forked from OSchip/llvm-project
3710 lines
138 KiB
C++
3710 lines
138 KiB
C++
//===--- ParseExpr.cpp - Expression Parsing -------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// Provides the Expression parsing implementation.
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///
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/// Expressions in C99 basically consist of a bunch of binary operators with
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/// unary operators and other random stuff at the leaves.
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///
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/// In the C99 grammar, these unary operators bind tightest and are represented
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/// as the 'cast-expression' production. Everything else is either a binary
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/// operator (e.g. '/') or a ternary operator ("?:"). The unary leaves are
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/// handled by ParseCastExpression, the higher level pieces are handled by
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/// ParseBinaryExpression.
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///
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//===----------------------------------------------------------------------===//
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#include "clang/Parse/Parser.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ExprCXX.h"
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#include "clang/Basic/PrettyStackTrace.h"
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#include "clang/Parse/RAIIObjectsForParser.h"
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#include "clang/Sema/DeclSpec.h"
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#include "clang/Sema/ParsedTemplate.h"
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#include "clang/Sema/Scope.h"
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#include "clang/Sema/TypoCorrection.h"
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#include "llvm/ADT/SmallVector.h"
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using namespace clang;
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/// Simple precedence-based parser for binary/ternary operators.
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///
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/// Note: we diverge from the C99 grammar when parsing the assignment-expression
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/// production. C99 specifies that the LHS of an assignment operator should be
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/// parsed as a unary-expression, but consistency dictates that it be a
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/// conditional-expession. In practice, the important thing here is that the
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/// LHS of an assignment has to be an l-value, which productions between
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/// unary-expression and conditional-expression don't produce. Because we want
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/// consistency, we parse the LHS as a conditional-expression, then check for
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/// l-value-ness in semantic analysis stages.
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///
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/// \verbatim
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/// pm-expression: [C++ 5.5]
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/// cast-expression
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/// pm-expression '.*' cast-expression
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/// pm-expression '->*' cast-expression
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///
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/// multiplicative-expression: [C99 6.5.5]
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/// Note: in C++, apply pm-expression instead of cast-expression
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/// cast-expression
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/// multiplicative-expression '*' cast-expression
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/// multiplicative-expression '/' cast-expression
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/// multiplicative-expression '%' cast-expression
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///
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/// additive-expression: [C99 6.5.6]
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/// multiplicative-expression
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/// additive-expression '+' multiplicative-expression
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/// additive-expression '-' multiplicative-expression
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///
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/// shift-expression: [C99 6.5.7]
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/// additive-expression
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/// shift-expression '<<' additive-expression
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/// shift-expression '>>' additive-expression
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///
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/// compare-expression: [C++20 expr.spaceship]
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/// shift-expression
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/// compare-expression '<=>' shift-expression
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///
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/// relational-expression: [C99 6.5.8]
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/// compare-expression
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/// relational-expression '<' compare-expression
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/// relational-expression '>' compare-expression
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/// relational-expression '<=' compare-expression
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/// relational-expression '>=' compare-expression
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///
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/// equality-expression: [C99 6.5.9]
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/// relational-expression
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/// equality-expression '==' relational-expression
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/// equality-expression '!=' relational-expression
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///
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/// AND-expression: [C99 6.5.10]
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/// equality-expression
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/// AND-expression '&' equality-expression
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///
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/// exclusive-OR-expression: [C99 6.5.11]
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/// AND-expression
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/// exclusive-OR-expression '^' AND-expression
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///
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/// inclusive-OR-expression: [C99 6.5.12]
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/// exclusive-OR-expression
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/// inclusive-OR-expression '|' exclusive-OR-expression
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///
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/// logical-AND-expression: [C99 6.5.13]
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/// inclusive-OR-expression
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/// logical-AND-expression '&&' inclusive-OR-expression
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///
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/// logical-OR-expression: [C99 6.5.14]
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/// logical-AND-expression
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/// logical-OR-expression '||' logical-AND-expression
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///
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/// conditional-expression: [C99 6.5.15]
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/// logical-OR-expression
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/// logical-OR-expression '?' expression ':' conditional-expression
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/// [GNU] logical-OR-expression '?' ':' conditional-expression
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/// [C++] the third operand is an assignment-expression
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///
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/// assignment-expression: [C99 6.5.16]
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/// conditional-expression
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/// unary-expression assignment-operator assignment-expression
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/// [C++] throw-expression [C++ 15]
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///
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/// assignment-operator: one of
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/// = *= /= %= += -= <<= >>= &= ^= |=
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///
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/// expression: [C99 6.5.17]
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/// assignment-expression ...[opt]
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/// expression ',' assignment-expression ...[opt]
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/// \endverbatim
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ExprResult Parser::ParseExpression(TypeCastState isTypeCast) {
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ExprResult LHS(ParseAssignmentExpression(isTypeCast));
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return ParseRHSOfBinaryExpression(LHS, prec::Comma);
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}
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/// This routine is called when the '@' is seen and consumed.
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/// Current token is an Identifier and is not a 'try'. This
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/// routine is necessary to disambiguate \@try-statement from,
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/// for example, \@encode-expression.
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///
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ExprResult
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Parser::ParseExpressionWithLeadingAt(SourceLocation AtLoc) {
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ExprResult LHS(ParseObjCAtExpression(AtLoc));
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return ParseRHSOfBinaryExpression(LHS, prec::Comma);
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}
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/// This routine is called when a leading '__extension__' is seen and
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/// consumed. This is necessary because the token gets consumed in the
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/// process of disambiguating between an expression and a declaration.
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ExprResult
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Parser::ParseExpressionWithLeadingExtension(SourceLocation ExtLoc) {
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ExprResult LHS(true);
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{
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// Silence extension warnings in the sub-expression
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ExtensionRAIIObject O(Diags);
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LHS = ParseCastExpression(AnyCastExpr);
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}
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if (!LHS.isInvalid())
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LHS = Actions.ActOnUnaryOp(getCurScope(), ExtLoc, tok::kw___extension__,
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LHS.get());
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return ParseRHSOfBinaryExpression(LHS, prec::Comma);
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}
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/// Parse an expr that doesn't include (top-level) commas.
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ExprResult Parser::ParseAssignmentExpression(TypeCastState isTypeCast) {
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteExpression(getCurScope(),
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PreferredType.get(Tok.getLocation()));
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cutOffParsing();
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return ExprError();
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}
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if (Tok.is(tok::kw_throw))
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return ParseThrowExpression();
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if (Tok.is(tok::kw_co_yield))
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return ParseCoyieldExpression();
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ExprResult LHS = ParseCastExpression(AnyCastExpr,
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/*isAddressOfOperand=*/false,
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isTypeCast);
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return ParseRHSOfBinaryExpression(LHS, prec::Assignment);
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}
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/// Parse an assignment expression where part of an Objective-C message
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/// send has already been parsed.
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///
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/// In this case \p LBracLoc indicates the location of the '[' of the message
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/// send, and either \p ReceiverName or \p ReceiverExpr is non-null indicating
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/// the receiver of the message.
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///
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/// Since this handles full assignment-expression's, it handles postfix
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/// expressions and other binary operators for these expressions as well.
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ExprResult
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Parser::ParseAssignmentExprWithObjCMessageExprStart(SourceLocation LBracLoc,
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SourceLocation SuperLoc,
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ParsedType ReceiverType,
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Expr *ReceiverExpr) {
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ExprResult R
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= ParseObjCMessageExpressionBody(LBracLoc, SuperLoc,
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ReceiverType, ReceiverExpr);
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R = ParsePostfixExpressionSuffix(R);
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return ParseRHSOfBinaryExpression(R, prec::Assignment);
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}
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ExprResult
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Parser::ParseConstantExpressionInExprEvalContext(TypeCastState isTypeCast) {
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assert(Actions.ExprEvalContexts.back().Context ==
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Sema::ExpressionEvaluationContext::ConstantEvaluated &&
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"Call this function only if your ExpressionEvaluationContext is "
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"already ConstantEvaluated");
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ExprResult LHS(ParseCastExpression(AnyCastExpr, false, isTypeCast));
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ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional));
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return Actions.ActOnConstantExpression(Res);
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}
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ExprResult Parser::ParseConstantExpression(TypeCastState isTypeCast) {
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// C++03 [basic.def.odr]p2:
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// An expression is potentially evaluated unless it appears where an
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// integral constant expression is required (see 5.19) [...].
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// C++98 and C++11 have no such rule, but this is only a defect in C++98.
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EnterExpressionEvaluationContext ConstantEvaluated(
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Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
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return ParseConstantExpressionInExprEvalContext(isTypeCast);
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}
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ExprResult Parser::ParseCaseExpression(SourceLocation CaseLoc) {
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EnterExpressionEvaluationContext ConstantEvaluated(
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Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
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ExprResult LHS(ParseCastExpression(AnyCastExpr, false, NotTypeCast));
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ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional));
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return Actions.ActOnCaseExpr(CaseLoc, Res);
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}
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/// Parse a constraint-expression.
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///
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/// \verbatim
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/// constraint-expression: C++2a[temp.constr.decl]p1
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/// logical-or-expression
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/// \endverbatim
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ExprResult Parser::ParseConstraintExpression() {
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EnterExpressionEvaluationContext ConstantEvaluated(
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Actions, Sema::ExpressionEvaluationContext::Unevaluated);
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ExprResult LHS(ParseCastExpression(AnyCastExpr));
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ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::LogicalOr));
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if (Res.isUsable() && !Actions.CheckConstraintExpression(Res.get())) {
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Actions.CorrectDelayedTyposInExpr(Res);
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return ExprError();
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}
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return Res;
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}
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/// \brief Parse a constraint-logical-and-expression.
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///
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/// \verbatim
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/// C++2a[temp.constr.decl]p1
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/// constraint-logical-and-expression:
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/// primary-expression
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/// constraint-logical-and-expression '&&' primary-expression
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///
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/// \endverbatim
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ExprResult
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Parser::ParseConstraintLogicalAndExpression(bool IsTrailingRequiresClause) {
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EnterExpressionEvaluationContext ConstantEvaluated(
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Actions, Sema::ExpressionEvaluationContext::Unevaluated);
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bool NotPrimaryExpression = false;
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auto ParsePrimary = [&] () {
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ExprResult E = ParseCastExpression(PrimaryExprOnly,
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/*isAddressOfOperand=*/false,
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/*isTypeCast=*/NotTypeCast,
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/*isVectorLiteral=*/false,
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&NotPrimaryExpression);
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if (E.isInvalid())
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return ExprError();
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auto RecoverFromNonPrimary = [&] (ExprResult E, bool Note) {
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E = ParsePostfixExpressionSuffix(E);
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// Use InclusiveOr, the precedence just after '&&' to not parse the
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// next arguments to the logical and.
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E = ParseRHSOfBinaryExpression(E, prec::InclusiveOr);
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if (!E.isInvalid())
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Diag(E.get()->getExprLoc(),
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Note
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? diag::note_unparenthesized_non_primary_expr_in_requires_clause
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: diag::err_unparenthesized_non_primary_expr_in_requires_clause)
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<< FixItHint::CreateInsertion(E.get()->getBeginLoc(), "(")
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<< FixItHint::CreateInsertion(
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PP.getLocForEndOfToken(E.get()->getEndLoc()), ")")
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<< E.get()->getSourceRange();
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return E;
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};
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if (NotPrimaryExpression ||
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// Check if the following tokens must be a part of a non-primary
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// expression
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getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator,
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/*CPlusPlus11=*/true) > prec::LogicalAnd ||
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// Postfix operators other than '(' (which will be checked for in
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// CheckConstraintExpression).
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Tok.isOneOf(tok::period, tok::plusplus, tok::minusminus) ||
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(Tok.is(tok::l_square) && !NextToken().is(tok::l_square))) {
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E = RecoverFromNonPrimary(E, /*Note=*/false);
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if (E.isInvalid())
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return ExprError();
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NotPrimaryExpression = false;
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}
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bool PossibleNonPrimary;
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bool IsConstraintExpr =
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Actions.CheckConstraintExpression(E.get(), Tok, &PossibleNonPrimary,
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IsTrailingRequiresClause);
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if (!IsConstraintExpr || PossibleNonPrimary) {
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// Atomic constraint might be an unparenthesized non-primary expression
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// (such as a binary operator), in which case we might get here (e.g. in
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// 'requires 0 + 1 && true' we would now be at '+', and parse and ignore
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// the rest of the addition expression). Try to parse the rest of it here.
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if (PossibleNonPrimary)
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E = RecoverFromNonPrimary(E, /*Note=*/!IsConstraintExpr);
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Actions.CorrectDelayedTyposInExpr(E);
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return ExprError();
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}
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return E;
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};
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ExprResult LHS = ParsePrimary();
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if (LHS.isInvalid())
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return ExprError();
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while (Tok.is(tok::ampamp)) {
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SourceLocation LogicalAndLoc = ConsumeToken();
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ExprResult RHS = ParsePrimary();
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if (RHS.isInvalid()) {
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Actions.CorrectDelayedTyposInExpr(LHS);
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return ExprError();
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}
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ExprResult Op = Actions.ActOnBinOp(getCurScope(), LogicalAndLoc,
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tok::ampamp, LHS.get(), RHS.get());
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if (!Op.isUsable()) {
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Actions.CorrectDelayedTyposInExpr(RHS);
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Actions.CorrectDelayedTyposInExpr(LHS);
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return ExprError();
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}
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LHS = Op;
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}
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return LHS;
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}
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/// \brief Parse a constraint-logical-or-expression.
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///
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/// \verbatim
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/// C++2a[temp.constr.decl]p1
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/// constraint-logical-or-expression:
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/// constraint-logical-and-expression
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/// constraint-logical-or-expression '||'
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/// constraint-logical-and-expression
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///
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/// \endverbatim
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ExprResult
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Parser::ParseConstraintLogicalOrExpression(bool IsTrailingRequiresClause) {
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ExprResult LHS(ParseConstraintLogicalAndExpression(IsTrailingRequiresClause));
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if (!LHS.isUsable())
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return ExprError();
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while (Tok.is(tok::pipepipe)) {
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SourceLocation LogicalOrLoc = ConsumeToken();
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ExprResult RHS =
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ParseConstraintLogicalAndExpression(IsTrailingRequiresClause);
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if (!RHS.isUsable()) {
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Actions.CorrectDelayedTyposInExpr(LHS);
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return ExprError();
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}
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ExprResult Op = Actions.ActOnBinOp(getCurScope(), LogicalOrLoc,
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tok::pipepipe, LHS.get(), RHS.get());
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if (!Op.isUsable()) {
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Actions.CorrectDelayedTyposInExpr(RHS);
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Actions.CorrectDelayedTyposInExpr(LHS);
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return ExprError();
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}
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LHS = Op;
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}
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return LHS;
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}
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bool Parser::isNotExpressionStart() {
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tok::TokenKind K = Tok.getKind();
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if (K == tok::l_brace || K == tok::r_brace ||
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K == tok::kw_for || K == tok::kw_while ||
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K == tok::kw_if || K == tok::kw_else ||
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K == tok::kw_goto || K == tok::kw_try)
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return true;
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// If this is a decl-specifier, we can't be at the start of an expression.
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return isKnownToBeDeclarationSpecifier();
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}
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bool Parser::isFoldOperator(prec::Level Level) const {
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return Level > prec::Unknown && Level != prec::Conditional &&
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Level != prec::Spaceship;
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}
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bool Parser::isFoldOperator(tok::TokenKind Kind) const {
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return isFoldOperator(getBinOpPrecedence(Kind, GreaterThanIsOperator, true));
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}
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/// Parse a binary expression that starts with \p LHS and has a
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/// precedence of at least \p MinPrec.
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ExprResult
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Parser::ParseRHSOfBinaryExpression(ExprResult LHS, prec::Level MinPrec) {
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prec::Level NextTokPrec = getBinOpPrecedence(Tok.getKind(),
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GreaterThanIsOperator,
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getLangOpts().CPlusPlus11);
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SourceLocation ColonLoc;
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auto SavedType = PreferredType;
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while (1) {
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// Every iteration may rely on a preferred type for the whole expression.
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PreferredType = SavedType;
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// If this token has a lower precedence than we are allowed to parse (e.g.
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// because we are called recursively, or because the token is not a binop),
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// then we are done!
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if (NextTokPrec < MinPrec)
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return LHS;
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// Consume the operator, saving the operator token for error reporting.
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Token OpToken = Tok;
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ConsumeToken();
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if (OpToken.is(tok::caretcaret)) {
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return ExprError(Diag(Tok, diag::err_opencl_logical_exclusive_or));
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}
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// If we're potentially in a template-id, we may now be able to determine
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// whether we're actually in one or not.
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if (OpToken.isOneOf(tok::comma, tok::greater, tok::greatergreater,
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tok::greatergreatergreater) &&
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checkPotentialAngleBracketDelimiter(OpToken))
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return ExprError();
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// Bail out when encountering a comma followed by a token which can't
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// possibly be the start of an expression. For instance:
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// int f() { return 1, }
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// We can't do this before consuming the comma, because
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// isNotExpressionStart() looks at the token stream.
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if (OpToken.is(tok::comma) && isNotExpressionStart()) {
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PP.EnterToken(Tok, /*IsReinject*/true);
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Tok = OpToken;
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return LHS;
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}
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// If the next token is an ellipsis, then this is a fold-expression. Leave
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// it alone so we can handle it in the paren expression.
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if (isFoldOperator(NextTokPrec) && Tok.is(tok::ellipsis)) {
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// FIXME: We can't check this via lookahead before we consume the token
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// because that tickles a lexer bug.
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PP.EnterToken(Tok, /*IsReinject*/true);
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Tok = OpToken;
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return LHS;
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}
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// In Objective-C++, alternative operator tokens can be used as keyword args
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// in message expressions. Unconsume the token so that it can reinterpreted
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// as an identifier in ParseObjCMessageExpressionBody. i.e., we support:
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// [foo meth:0 and:0];
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// [foo not_eq];
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if (getLangOpts().ObjC && getLangOpts().CPlusPlus &&
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Tok.isOneOf(tok::colon, tok::r_square) &&
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OpToken.getIdentifierInfo() != nullptr) {
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PP.EnterToken(Tok, /*IsReinject*/true);
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Tok = OpToken;
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return LHS;
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}
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// Special case handling for the ternary operator.
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ExprResult TernaryMiddle(true);
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if (NextTokPrec == prec::Conditional) {
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if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
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// Parse a braced-init-list here for error recovery purposes.
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SourceLocation BraceLoc = Tok.getLocation();
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TernaryMiddle = ParseBraceInitializer();
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if (!TernaryMiddle.isInvalid()) {
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Diag(BraceLoc, diag::err_init_list_bin_op)
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<< /*RHS*/ 1 << PP.getSpelling(OpToken)
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<< Actions.getExprRange(TernaryMiddle.get());
|
|
TernaryMiddle = ExprError();
|
|
}
|
|
} else if (Tok.isNot(tok::colon)) {
|
|
// Don't parse FOO:BAR as if it were a typo for FOO::BAR.
|
|
ColonProtectionRAIIObject X(*this);
|
|
|
|
// Handle this production specially:
|
|
// logical-OR-expression '?' expression ':' conditional-expression
|
|
// In particular, the RHS of the '?' is 'expression', not
|
|
// 'logical-OR-expression' as we might expect.
|
|
TernaryMiddle = ParseExpression();
|
|
} else {
|
|
// Special case handling of "X ? Y : Z" where Y is empty:
|
|
// logical-OR-expression '?' ':' conditional-expression [GNU]
|
|
TernaryMiddle = nullptr;
|
|
Diag(Tok, diag::ext_gnu_conditional_expr);
|
|
}
|
|
|
|
if (TernaryMiddle.isInvalid()) {
|
|
Actions.CorrectDelayedTyposInExpr(LHS);
|
|
LHS = ExprError();
|
|
TernaryMiddle = nullptr;
|
|
}
|
|
|
|
if (!TryConsumeToken(tok::colon, ColonLoc)) {
|
|
// Otherwise, we're missing a ':'. Assume that this was a typo that
|
|
// the user forgot. If we're not in a macro expansion, we can suggest
|
|
// a fixit hint. If there were two spaces before the current token,
|
|
// suggest inserting the colon in between them, otherwise insert ": ".
|
|
SourceLocation FILoc = Tok.getLocation();
|
|
const char *FIText = ": ";
|
|
const SourceManager &SM = PP.getSourceManager();
|
|
if (FILoc.isFileID() || PP.isAtStartOfMacroExpansion(FILoc, &FILoc)) {
|
|
assert(FILoc.isFileID());
|
|
bool IsInvalid = false;
|
|
const char *SourcePtr =
|
|
SM.getCharacterData(FILoc.getLocWithOffset(-1), &IsInvalid);
|
|
if (!IsInvalid && *SourcePtr == ' ') {
|
|
SourcePtr =
|
|
SM.getCharacterData(FILoc.getLocWithOffset(-2), &IsInvalid);
|
|
if (!IsInvalid && *SourcePtr == ' ') {
|
|
FILoc = FILoc.getLocWithOffset(-1);
|
|
FIText = ":";
|
|
}
|
|
}
|
|
}
|
|
|
|
Diag(Tok, diag::err_expected)
|
|
<< tok::colon << FixItHint::CreateInsertion(FILoc, FIText);
|
|
Diag(OpToken, diag::note_matching) << tok::question;
|
|
ColonLoc = Tok.getLocation();
|
|
}
|
|
}
|
|
|
|
PreferredType.enterBinary(Actions, Tok.getLocation(), LHS.get(),
|
|
OpToken.getKind());
|
|
// Parse another leaf here for the RHS of the operator.
|
|
// ParseCastExpression works here because all RHS expressions in C have it
|
|
// as a prefix, at least. However, in C++, an assignment-expression could
|
|
// be a throw-expression, which is not a valid cast-expression.
|
|
// Therefore we need some special-casing here.
|
|
// Also note that the third operand of the conditional operator is
|
|
// an assignment-expression in C++, and in C++11, we can have a
|
|
// braced-init-list on the RHS of an assignment. For better diagnostics,
|
|
// parse as if we were allowed braced-init-lists everywhere, and check that
|
|
// they only appear on the RHS of assignments later.
|
|
ExprResult RHS;
|
|
bool RHSIsInitList = false;
|
|
if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
|
|
RHS = ParseBraceInitializer();
|
|
RHSIsInitList = true;
|
|
} else if (getLangOpts().CPlusPlus && NextTokPrec <= prec::Conditional)
|
|
RHS = ParseAssignmentExpression();
|
|
else
|
|
RHS = ParseCastExpression(AnyCastExpr);
|
|
|
|
if (RHS.isInvalid()) {
|
|
// FIXME: Errors generated by the delayed typo correction should be
|
|
// printed before errors from parsing the RHS, not after.
|
|
Actions.CorrectDelayedTyposInExpr(LHS);
|
|
if (TernaryMiddle.isUsable())
|
|
TernaryMiddle = Actions.CorrectDelayedTyposInExpr(TernaryMiddle);
|
|
LHS = ExprError();
|
|
}
|
|
|
|
// Remember the precedence of this operator and get the precedence of the
|
|
// operator immediately to the right of the RHS.
|
|
prec::Level ThisPrec = NextTokPrec;
|
|
NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator,
|
|
getLangOpts().CPlusPlus11);
|
|
|
|
// Assignment and conditional expressions are right-associative.
|
|
bool isRightAssoc = ThisPrec == prec::Conditional ||
|
|
ThisPrec == prec::Assignment;
|
|
|
|
// Get the precedence of the operator to the right of the RHS. If it binds
|
|
// more tightly with RHS than we do, evaluate it completely first.
|
|
if (ThisPrec < NextTokPrec ||
|
|
(ThisPrec == NextTokPrec && isRightAssoc)) {
|
|
if (!RHS.isInvalid() && RHSIsInitList) {
|
|
Diag(Tok, diag::err_init_list_bin_op)
|
|
<< /*LHS*/0 << PP.getSpelling(Tok) << Actions.getExprRange(RHS.get());
|
|
RHS = ExprError();
|
|
}
|
|
// If this is left-associative, only parse things on the RHS that bind
|
|
// more tightly than the current operator. If it is left-associative, it
|
|
// is okay, to bind exactly as tightly. For example, compile A=B=C=D as
|
|
// A=(B=(C=D)), where each paren is a level of recursion here.
|
|
// The function takes ownership of the RHS.
|
|
RHS = ParseRHSOfBinaryExpression(RHS,
|
|
static_cast<prec::Level>(ThisPrec + !isRightAssoc));
|
|
RHSIsInitList = false;
|
|
|
|
if (RHS.isInvalid()) {
|
|
// FIXME: Errors generated by the delayed typo correction should be
|
|
// printed before errors from ParseRHSOfBinaryExpression, not after.
|
|
Actions.CorrectDelayedTyposInExpr(LHS);
|
|
if (TernaryMiddle.isUsable())
|
|
TernaryMiddle = Actions.CorrectDelayedTyposInExpr(TernaryMiddle);
|
|
LHS = ExprError();
|
|
}
|
|
|
|
NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator,
|
|
getLangOpts().CPlusPlus11);
|
|
}
|
|
|
|
if (!RHS.isInvalid() && RHSIsInitList) {
|
|
if (ThisPrec == prec::Assignment) {
|
|
Diag(OpToken, diag::warn_cxx98_compat_generalized_initializer_lists)
|
|
<< Actions.getExprRange(RHS.get());
|
|
} else if (ColonLoc.isValid()) {
|
|
Diag(ColonLoc, diag::err_init_list_bin_op)
|
|
<< /*RHS*/1 << ":"
|
|
<< Actions.getExprRange(RHS.get());
|
|
LHS = ExprError();
|
|
} else {
|
|
Diag(OpToken, diag::err_init_list_bin_op)
|
|
<< /*RHS*/1 << PP.getSpelling(OpToken)
|
|
<< Actions.getExprRange(RHS.get());
|
|
LHS = ExprError();
|
|
}
|
|
}
|
|
|
|
ExprResult OrigLHS = LHS;
|
|
if (!LHS.isInvalid()) {
|
|
// Combine the LHS and RHS into the LHS (e.g. build AST).
|
|
if (TernaryMiddle.isInvalid()) {
|
|
// If we're using '>>' as an operator within a template
|
|
// argument list (in C++98), suggest the addition of
|
|
// parentheses so that the code remains well-formed in C++0x.
|
|
if (!GreaterThanIsOperator && OpToken.is(tok::greatergreater))
|
|
SuggestParentheses(OpToken.getLocation(),
|
|
diag::warn_cxx11_right_shift_in_template_arg,
|
|
SourceRange(Actions.getExprRange(LHS.get()).getBegin(),
|
|
Actions.getExprRange(RHS.get()).getEnd()));
|
|
|
|
ExprResult BinOp =
|
|
Actions.ActOnBinOp(getCurScope(), OpToken.getLocation(),
|
|
OpToken.getKind(), LHS.get(), RHS.get());
|
|
if (BinOp.isInvalid())
|
|
BinOp = Actions.CreateRecoveryExpr(LHS.get()->getBeginLoc(),
|
|
RHS.get()->getEndLoc(),
|
|
{LHS.get(), RHS.get()});
|
|
|
|
LHS = BinOp;
|
|
} else {
|
|
ExprResult CondOp = Actions.ActOnConditionalOp(
|
|
OpToken.getLocation(), ColonLoc, LHS.get(), TernaryMiddle.get(),
|
|
RHS.get());
|
|
if (CondOp.isInvalid()) {
|
|
std::vector<clang::Expr *> Args;
|
|
// TernaryMiddle can be null for the GNU conditional expr extension.
|
|
if (TernaryMiddle.get())
|
|
Args = {LHS.get(), TernaryMiddle.get(), RHS.get()};
|
|
else
|
|
Args = {LHS.get(), RHS.get()};
|
|
CondOp = Actions.CreateRecoveryExpr(LHS.get()->getBeginLoc(),
|
|
RHS.get()->getEndLoc(), Args);
|
|
}
|
|
|
|
LHS = CondOp;
|
|
}
|
|
// In this case, ActOnBinOp or ActOnConditionalOp performed the
|
|
// CorrectDelayedTyposInExpr check.
|
|
if (!getLangOpts().CPlusPlus)
|
|
continue;
|
|
}
|
|
|
|
// Ensure potential typos aren't left undiagnosed.
|
|
if (LHS.isInvalid()) {
|
|
Actions.CorrectDelayedTyposInExpr(OrigLHS);
|
|
Actions.CorrectDelayedTyposInExpr(TernaryMiddle);
|
|
Actions.CorrectDelayedTyposInExpr(RHS);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Parse a cast-expression, unary-expression or primary-expression, based
|
|
/// on \p ExprType.
|
|
///
|
|
/// \p isAddressOfOperand exists because an id-expression that is the
|
|
/// operand of address-of gets special treatment due to member pointers.
|
|
///
|
|
ExprResult Parser::ParseCastExpression(CastParseKind ParseKind,
|
|
bool isAddressOfOperand,
|
|
TypeCastState isTypeCast,
|
|
bool isVectorLiteral,
|
|
bool *NotPrimaryExpression) {
|
|
bool NotCastExpr;
|
|
ExprResult Res = ParseCastExpression(ParseKind,
|
|
isAddressOfOperand,
|
|
NotCastExpr,
|
|
isTypeCast,
|
|
isVectorLiteral,
|
|
NotPrimaryExpression);
|
|
if (NotCastExpr)
|
|
Diag(Tok, diag::err_expected_expression);
|
|
return Res;
|
|
}
|
|
|
|
namespace {
|
|
class CastExpressionIdValidator final : public CorrectionCandidateCallback {
|
|
public:
|
|
CastExpressionIdValidator(Token Next, bool AllowTypes, bool AllowNonTypes)
|
|
: NextToken(Next), AllowNonTypes(AllowNonTypes) {
|
|
WantTypeSpecifiers = WantFunctionLikeCasts = AllowTypes;
|
|
}
|
|
|
|
bool ValidateCandidate(const TypoCorrection &candidate) override {
|
|
NamedDecl *ND = candidate.getCorrectionDecl();
|
|
if (!ND)
|
|
return candidate.isKeyword();
|
|
|
|
if (isa<TypeDecl>(ND))
|
|
return WantTypeSpecifiers;
|
|
|
|
if (!AllowNonTypes || !CorrectionCandidateCallback::ValidateCandidate(candidate))
|
|
return false;
|
|
|
|
if (!NextToken.isOneOf(tok::equal, tok::arrow, tok::period))
|
|
return true;
|
|
|
|
for (auto *C : candidate) {
|
|
NamedDecl *ND = C->getUnderlyingDecl();
|
|
if (isa<ValueDecl>(ND) && !isa<FunctionDecl>(ND))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
std::unique_ptr<CorrectionCandidateCallback> clone() override {
|
|
return std::make_unique<CastExpressionIdValidator>(*this);
|
|
}
|
|
|
|
private:
|
|
Token NextToken;
|
|
bool AllowNonTypes;
|
|
};
|
|
}
|
|
|
|
/// Parse a cast-expression, or, if \pisUnaryExpression is true, parse
|
|
/// a unary-expression.
|
|
///
|
|
/// \p isAddressOfOperand exists because an id-expression that is the operand
|
|
/// of address-of gets special treatment due to member pointers. NotCastExpr
|
|
/// is set to true if the token is not the start of a cast-expression, and no
|
|
/// diagnostic is emitted in this case and no tokens are consumed.
|
|
///
|
|
/// \verbatim
|
|
/// cast-expression: [C99 6.5.4]
|
|
/// unary-expression
|
|
/// '(' type-name ')' cast-expression
|
|
///
|
|
/// unary-expression: [C99 6.5.3]
|
|
/// postfix-expression
|
|
/// '++' unary-expression
|
|
/// '--' unary-expression
|
|
/// [Coro] 'co_await' cast-expression
|
|
/// unary-operator cast-expression
|
|
/// 'sizeof' unary-expression
|
|
/// 'sizeof' '(' type-name ')'
|
|
/// [C++11] 'sizeof' '...' '(' identifier ')'
|
|
/// [GNU] '__alignof' unary-expression
|
|
/// [GNU] '__alignof' '(' type-name ')'
|
|
/// [C11] '_Alignof' '(' type-name ')'
|
|
/// [C++11] 'alignof' '(' type-id ')'
|
|
/// [GNU] '&&' identifier
|
|
/// [C++11] 'noexcept' '(' expression ')' [C++11 5.3.7]
|
|
/// [C++] new-expression
|
|
/// [C++] delete-expression
|
|
///
|
|
/// unary-operator: one of
|
|
/// '&' '*' '+' '-' '~' '!'
|
|
/// [GNU] '__extension__' '__real' '__imag'
|
|
///
|
|
/// primary-expression: [C99 6.5.1]
|
|
/// [C99] identifier
|
|
/// [C++] id-expression
|
|
/// constant
|
|
/// string-literal
|
|
/// [C++] boolean-literal [C++ 2.13.5]
|
|
/// [C++11] 'nullptr' [C++11 2.14.7]
|
|
/// [C++11] user-defined-literal
|
|
/// '(' expression ')'
|
|
/// [C11] generic-selection
|
|
/// [C++2a] requires-expression
|
|
/// '__func__' [C99 6.4.2.2]
|
|
/// [GNU] '__FUNCTION__'
|
|
/// [MS] '__FUNCDNAME__'
|
|
/// [MS] 'L__FUNCTION__'
|
|
/// [MS] '__FUNCSIG__'
|
|
/// [MS] 'L__FUNCSIG__'
|
|
/// [GNU] '__PRETTY_FUNCTION__'
|
|
/// [GNU] '(' compound-statement ')'
|
|
/// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')'
|
|
/// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')'
|
|
/// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
|
|
/// assign-expr ')'
|
|
/// [GNU] '__builtin_FILE' '(' ')'
|
|
/// [GNU] '__builtin_FUNCTION' '(' ')'
|
|
/// [GNU] '__builtin_LINE' '(' ')'
|
|
/// [CLANG] '__builtin_COLUMN' '(' ')'
|
|
/// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
|
|
/// [GNU] '__null'
|
|
/// [OBJC] '[' objc-message-expr ']'
|
|
/// [OBJC] '\@selector' '(' objc-selector-arg ')'
|
|
/// [OBJC] '\@protocol' '(' identifier ')'
|
|
/// [OBJC] '\@encode' '(' type-name ')'
|
|
/// [OBJC] objc-string-literal
|
|
/// [C++] simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3]
|
|
/// [C++11] simple-type-specifier braced-init-list [C++11 5.2.3]
|
|
/// [C++] typename-specifier '(' expression-list[opt] ')' [C++ 5.2.3]
|
|
/// [C++11] typename-specifier braced-init-list [C++11 5.2.3]
|
|
/// [C++] 'const_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
|
|
/// [C++] 'dynamic_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
|
|
/// [C++] 'reinterpret_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
|
|
/// [C++] 'static_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
|
|
/// [C++] 'typeid' '(' expression ')' [C++ 5.2p1]
|
|
/// [C++] 'typeid' '(' type-id ')' [C++ 5.2p1]
|
|
/// [C++] 'this' [C++ 9.3.2]
|
|
/// [G++] unary-type-trait '(' type-id ')'
|
|
/// [G++] binary-type-trait '(' type-id ',' type-id ')' [TODO]
|
|
/// [EMBT] array-type-trait '(' type-id ',' integer ')'
|
|
/// [clang] '^' block-literal
|
|
///
|
|
/// constant: [C99 6.4.4]
|
|
/// integer-constant
|
|
/// floating-constant
|
|
/// enumeration-constant -> identifier
|
|
/// character-constant
|
|
///
|
|
/// id-expression: [C++ 5.1]
|
|
/// unqualified-id
|
|
/// qualified-id
|
|
///
|
|
/// unqualified-id: [C++ 5.1]
|
|
/// identifier
|
|
/// operator-function-id
|
|
/// conversion-function-id
|
|
/// '~' class-name
|
|
/// template-id
|
|
///
|
|
/// new-expression: [C++ 5.3.4]
|
|
/// '::'[opt] 'new' new-placement[opt] new-type-id
|
|
/// new-initializer[opt]
|
|
/// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
|
|
/// new-initializer[opt]
|
|
///
|
|
/// delete-expression: [C++ 5.3.5]
|
|
/// '::'[opt] 'delete' cast-expression
|
|
/// '::'[opt] 'delete' '[' ']' cast-expression
|
|
///
|
|
/// [GNU/Embarcadero] unary-type-trait:
|
|
/// '__is_arithmetic'
|
|
/// '__is_floating_point'
|
|
/// '__is_integral'
|
|
/// '__is_lvalue_expr'
|
|
/// '__is_rvalue_expr'
|
|
/// '__is_complete_type'
|
|
/// '__is_void'
|
|
/// '__is_array'
|
|
/// '__is_function'
|
|
/// '__is_reference'
|
|
/// '__is_lvalue_reference'
|
|
/// '__is_rvalue_reference'
|
|
/// '__is_fundamental'
|
|
/// '__is_object'
|
|
/// '__is_scalar'
|
|
/// '__is_compound'
|
|
/// '__is_pointer'
|
|
/// '__is_member_object_pointer'
|
|
/// '__is_member_function_pointer'
|
|
/// '__is_member_pointer'
|
|
/// '__is_const'
|
|
/// '__is_volatile'
|
|
/// '__is_trivial'
|
|
/// '__is_standard_layout'
|
|
/// '__is_signed'
|
|
/// '__is_unsigned'
|
|
///
|
|
/// [GNU] unary-type-trait:
|
|
/// '__has_nothrow_assign'
|
|
/// '__has_nothrow_copy'
|
|
/// '__has_nothrow_constructor'
|
|
/// '__has_trivial_assign' [TODO]
|
|
/// '__has_trivial_copy' [TODO]
|
|
/// '__has_trivial_constructor'
|
|
/// '__has_trivial_destructor'
|
|
/// '__has_virtual_destructor'
|
|
/// '__is_abstract' [TODO]
|
|
/// '__is_class'
|
|
/// '__is_empty' [TODO]
|
|
/// '__is_enum'
|
|
/// '__is_final'
|
|
/// '__is_pod'
|
|
/// '__is_polymorphic'
|
|
/// '__is_sealed' [MS]
|
|
/// '__is_trivial'
|
|
/// '__is_union'
|
|
/// '__has_unique_object_representations'
|
|
///
|
|
/// [Clang] unary-type-trait:
|
|
/// '__is_aggregate'
|
|
/// '__trivially_copyable'
|
|
///
|
|
/// binary-type-trait:
|
|
/// [GNU] '__is_base_of'
|
|
/// [MS] '__is_convertible_to'
|
|
/// '__is_convertible'
|
|
/// '__is_same'
|
|
///
|
|
/// [Embarcadero] array-type-trait:
|
|
/// '__array_rank'
|
|
/// '__array_extent'
|
|
///
|
|
/// [Embarcadero] expression-trait:
|
|
/// '__is_lvalue_expr'
|
|
/// '__is_rvalue_expr'
|
|
/// \endverbatim
|
|
///
|
|
ExprResult Parser::ParseCastExpression(CastParseKind ParseKind,
|
|
bool isAddressOfOperand,
|
|
bool &NotCastExpr,
|
|
TypeCastState isTypeCast,
|
|
bool isVectorLiteral,
|
|
bool *NotPrimaryExpression) {
|
|
ExprResult Res;
|
|
tok::TokenKind SavedKind = Tok.getKind();
|
|
auto SavedType = PreferredType;
|
|
NotCastExpr = false;
|
|
|
|
// Are postfix-expression suffix operators permitted after this
|
|
// cast-expression? If not, and we find some, we'll parse them anyway and
|
|
// diagnose them.
|
|
bool AllowSuffix = true;
|
|
|
|
// This handles all of cast-expression, unary-expression, postfix-expression,
|
|
// and primary-expression. We handle them together like this for efficiency
|
|
// and to simplify handling of an expression starting with a '(' token: which
|
|
// may be one of a parenthesized expression, cast-expression, compound literal
|
|
// expression, or statement expression.
|
|
//
|
|
// If the parsed tokens consist of a primary-expression, the cases below
|
|
// break out of the switch; at the end we call ParsePostfixExpressionSuffix
|
|
// to handle the postfix expression suffixes. Cases that cannot be followed
|
|
// by postfix exprs should set AllowSuffix to false.
|
|
switch (SavedKind) {
|
|
case tok::l_paren: {
|
|
// If this expression is limited to being a unary-expression, the paren can
|
|
// not start a cast expression.
|
|
ParenParseOption ParenExprType;
|
|
switch (ParseKind) {
|
|
case CastParseKind::UnaryExprOnly:
|
|
if (!getLangOpts().CPlusPlus)
|
|
ParenExprType = CompoundLiteral;
|
|
LLVM_FALLTHROUGH;
|
|
case CastParseKind::AnyCastExpr:
|
|
ParenExprType = ParenParseOption::CastExpr;
|
|
break;
|
|
case CastParseKind::PrimaryExprOnly:
|
|
ParenExprType = FoldExpr;
|
|
break;
|
|
}
|
|
ParsedType CastTy;
|
|
SourceLocation RParenLoc;
|
|
Res = ParseParenExpression(ParenExprType, false/*stopIfCastExr*/,
|
|
isTypeCast == IsTypeCast, CastTy, RParenLoc);
|
|
|
|
// FIXME: What should we do if a vector literal is followed by a
|
|
// postfix-expression suffix? Usually postfix operators are permitted on
|
|
// literals.
|
|
if (isVectorLiteral)
|
|
return Res;
|
|
|
|
switch (ParenExprType) {
|
|
case SimpleExpr: break; // Nothing else to do.
|
|
case CompoundStmt: break; // Nothing else to do.
|
|
case CompoundLiteral:
|
|
// We parsed '(' type-name ')' '{' ... '}'. If any suffixes of
|
|
// postfix-expression exist, parse them now.
|
|
break;
|
|
case CastExpr:
|
|
// We have parsed the cast-expression and no postfix-expr pieces are
|
|
// following.
|
|
return Res;
|
|
case FoldExpr:
|
|
// We only parsed a fold-expression. There might be postfix-expr pieces
|
|
// afterwards; parse them now.
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
// primary-expression
|
|
case tok::numeric_constant:
|
|
// constant: integer-constant
|
|
// constant: floating-constant
|
|
|
|
Res = Actions.ActOnNumericConstant(Tok, /*UDLScope*/getCurScope());
|
|
ConsumeToken();
|
|
break;
|
|
|
|
case tok::kw_true:
|
|
case tok::kw_false:
|
|
Res = ParseCXXBoolLiteral();
|
|
break;
|
|
|
|
case tok::kw___objc_yes:
|
|
case tok::kw___objc_no:
|
|
Res = ParseObjCBoolLiteral();
|
|
break;
|
|
|
|
case tok::kw_nullptr:
|
|
Diag(Tok, diag::warn_cxx98_compat_nullptr);
|
|
Res = Actions.ActOnCXXNullPtrLiteral(ConsumeToken());
|
|
break;
|
|
|
|
case tok::annot_uneval_primary_expr:
|
|
case tok::annot_primary_expr:
|
|
Res = getExprAnnotation(Tok);
|
|
if (SavedKind == tok::annot_uneval_primary_expr) {
|
|
if (Expr *E = Res.get()) {
|
|
if (!E->isTypeDependent() && !E->containsErrors()) {
|
|
// TransformToPotentiallyEvaluated expects that it will still be in a
|
|
// (temporary) unevaluated context and then looks through that context
|
|
// to build it in the surrounding context. So we need to push an
|
|
// unevaluated context to balance things out.
|
|
EnterExpressionEvaluationContext Unevaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::Unevaluated,
|
|
Sema::ReuseLambdaContextDecl);
|
|
Res = Actions.TransformToPotentiallyEvaluated(Res.get());
|
|
}
|
|
}
|
|
}
|
|
ConsumeAnnotationToken();
|
|
if (!Res.isInvalid() && Tok.is(tok::less))
|
|
checkPotentialAngleBracket(Res);
|
|
break;
|
|
|
|
case tok::annot_non_type:
|
|
case tok::annot_non_type_dependent:
|
|
case tok::annot_non_type_undeclared: {
|
|
CXXScopeSpec SS;
|
|
Token Replacement;
|
|
Res = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement);
|
|
assert(!Res.isUnset() &&
|
|
"should not perform typo correction on annotation token");
|
|
break;
|
|
}
|
|
|
|
case tok::kw___super:
|
|
case tok::kw_decltype:
|
|
// Annotate the token and tail recurse.
|
|
if (TryAnnotateTypeOrScopeToken())
|
|
return ExprError();
|
|
assert(Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super));
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast,
|
|
isVectorLiteral, NotPrimaryExpression);
|
|
|
|
case tok::identifier: { // primary-expression: identifier
|
|
// unqualified-id: identifier
|
|
// constant: enumeration-constant
|
|
// Turn a potentially qualified name into a annot_typename or
|
|
// annot_cxxscope if it would be valid. This handles things like x::y, etc.
|
|
if (getLangOpts().CPlusPlus) {
|
|
// Avoid the unnecessary parse-time lookup in the common case
|
|
// where the syntax forbids a type.
|
|
const Token &Next = NextToken();
|
|
|
|
// If this identifier was reverted from a token ID, and the next token
|
|
// is a parenthesis, this is likely to be a use of a type trait. Check
|
|
// those tokens.
|
|
if (Next.is(tok::l_paren) &&
|
|
Tok.is(tok::identifier) &&
|
|
Tok.getIdentifierInfo()->hasRevertedTokenIDToIdentifier()) {
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
// Build up the mapping of revertible type traits, for future use.
|
|
if (RevertibleTypeTraits.empty()) {
|
|
#define RTT_JOIN(X,Y) X##Y
|
|
#define REVERTIBLE_TYPE_TRAIT(Name) \
|
|
RevertibleTypeTraits[PP.getIdentifierInfo(#Name)] \
|
|
= RTT_JOIN(tok::kw_,Name)
|
|
|
|
REVERTIBLE_TYPE_TRAIT(__is_abstract);
|
|
REVERTIBLE_TYPE_TRAIT(__is_aggregate);
|
|
REVERTIBLE_TYPE_TRAIT(__is_arithmetic);
|
|
REVERTIBLE_TYPE_TRAIT(__is_array);
|
|
REVERTIBLE_TYPE_TRAIT(__is_assignable);
|
|
REVERTIBLE_TYPE_TRAIT(__is_base_of);
|
|
REVERTIBLE_TYPE_TRAIT(__is_class);
|
|
REVERTIBLE_TYPE_TRAIT(__is_complete_type);
|
|
REVERTIBLE_TYPE_TRAIT(__is_compound);
|
|
REVERTIBLE_TYPE_TRAIT(__is_const);
|
|
REVERTIBLE_TYPE_TRAIT(__is_constructible);
|
|
REVERTIBLE_TYPE_TRAIT(__is_convertible);
|
|
REVERTIBLE_TYPE_TRAIT(__is_convertible_to);
|
|
REVERTIBLE_TYPE_TRAIT(__is_destructible);
|
|
REVERTIBLE_TYPE_TRAIT(__is_empty);
|
|
REVERTIBLE_TYPE_TRAIT(__is_enum);
|
|
REVERTIBLE_TYPE_TRAIT(__is_floating_point);
|
|
REVERTIBLE_TYPE_TRAIT(__is_final);
|
|
REVERTIBLE_TYPE_TRAIT(__is_function);
|
|
REVERTIBLE_TYPE_TRAIT(__is_fundamental);
|
|
REVERTIBLE_TYPE_TRAIT(__is_integral);
|
|
REVERTIBLE_TYPE_TRAIT(__is_interface_class);
|
|
REVERTIBLE_TYPE_TRAIT(__is_literal);
|
|
REVERTIBLE_TYPE_TRAIT(__is_lvalue_expr);
|
|
REVERTIBLE_TYPE_TRAIT(__is_lvalue_reference);
|
|
REVERTIBLE_TYPE_TRAIT(__is_member_function_pointer);
|
|
REVERTIBLE_TYPE_TRAIT(__is_member_object_pointer);
|
|
REVERTIBLE_TYPE_TRAIT(__is_member_pointer);
|
|
REVERTIBLE_TYPE_TRAIT(__is_nothrow_assignable);
|
|
REVERTIBLE_TYPE_TRAIT(__is_nothrow_constructible);
|
|
REVERTIBLE_TYPE_TRAIT(__is_nothrow_destructible);
|
|
REVERTIBLE_TYPE_TRAIT(__is_object);
|
|
REVERTIBLE_TYPE_TRAIT(__is_pod);
|
|
REVERTIBLE_TYPE_TRAIT(__is_pointer);
|
|
REVERTIBLE_TYPE_TRAIT(__is_polymorphic);
|
|
REVERTIBLE_TYPE_TRAIT(__is_reference);
|
|
REVERTIBLE_TYPE_TRAIT(__is_rvalue_expr);
|
|
REVERTIBLE_TYPE_TRAIT(__is_rvalue_reference);
|
|
REVERTIBLE_TYPE_TRAIT(__is_same);
|
|
REVERTIBLE_TYPE_TRAIT(__is_scalar);
|
|
REVERTIBLE_TYPE_TRAIT(__is_sealed);
|
|
REVERTIBLE_TYPE_TRAIT(__is_signed);
|
|
REVERTIBLE_TYPE_TRAIT(__is_standard_layout);
|
|
REVERTIBLE_TYPE_TRAIT(__is_trivial);
|
|
REVERTIBLE_TYPE_TRAIT(__is_trivially_assignable);
|
|
REVERTIBLE_TYPE_TRAIT(__is_trivially_constructible);
|
|
REVERTIBLE_TYPE_TRAIT(__is_trivially_copyable);
|
|
REVERTIBLE_TYPE_TRAIT(__is_union);
|
|
REVERTIBLE_TYPE_TRAIT(__is_unsigned);
|
|
REVERTIBLE_TYPE_TRAIT(__is_void);
|
|
REVERTIBLE_TYPE_TRAIT(__is_volatile);
|
|
#undef REVERTIBLE_TYPE_TRAIT
|
|
#undef RTT_JOIN
|
|
}
|
|
|
|
// If we find that this is in fact the name of a type trait,
|
|
// update the token kind in place and parse again to treat it as
|
|
// the appropriate kind of type trait.
|
|
llvm::SmallDenseMap<IdentifierInfo *, tok::TokenKind>::iterator Known
|
|
= RevertibleTypeTraits.find(II);
|
|
if (Known != RevertibleTypeTraits.end()) {
|
|
Tok.setKind(Known->second);
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand,
|
|
NotCastExpr, isTypeCast,
|
|
isVectorLiteral, NotPrimaryExpression);
|
|
}
|
|
}
|
|
|
|
if ((!ColonIsSacred && Next.is(tok::colon)) ||
|
|
Next.isOneOf(tok::coloncolon, tok::less, tok::l_paren,
|
|
tok::l_brace)) {
|
|
// If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
|
|
if (TryAnnotateTypeOrScopeToken())
|
|
return ExprError();
|
|
if (!Tok.is(tok::identifier))
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand,
|
|
NotCastExpr, isTypeCast,
|
|
isVectorLiteral,
|
|
NotPrimaryExpression);
|
|
}
|
|
}
|
|
|
|
// Consume the identifier so that we can see if it is followed by a '(' or
|
|
// '.'.
|
|
IdentifierInfo &II = *Tok.getIdentifierInfo();
|
|
SourceLocation ILoc = ConsumeToken();
|
|
|
|
// Support 'Class.property' and 'super.property' notation.
|
|
if (getLangOpts().ObjC && Tok.is(tok::period) &&
|
|
(Actions.getTypeName(II, ILoc, getCurScope()) ||
|
|
// Allow the base to be 'super' if in an objc-method.
|
|
(&II == Ident_super && getCurScope()->isInObjcMethodScope()))) {
|
|
ConsumeToken();
|
|
|
|
if (Tok.is(tok::code_completion) && &II != Ident_super) {
|
|
Actions.CodeCompleteObjCClassPropertyRefExpr(
|
|
getCurScope(), II, ILoc, ExprStatementTokLoc == ILoc);
|
|
cutOffParsing();
|
|
return ExprError();
|
|
}
|
|
// Allow either an identifier or the keyword 'class' (in C++).
|
|
if (Tok.isNot(tok::identifier) &&
|
|
!(getLangOpts().CPlusPlus && Tok.is(tok::kw_class))) {
|
|
Diag(Tok, diag::err_expected_property_name);
|
|
return ExprError();
|
|
}
|
|
IdentifierInfo &PropertyName = *Tok.getIdentifierInfo();
|
|
SourceLocation PropertyLoc = ConsumeToken();
|
|
|
|
Res = Actions.ActOnClassPropertyRefExpr(II, PropertyName,
|
|
ILoc, PropertyLoc);
|
|
break;
|
|
}
|
|
|
|
// In an Objective-C method, if we have "super" followed by an identifier,
|
|
// the token sequence is ill-formed. However, if there's a ':' or ']' after
|
|
// that identifier, this is probably a message send with a missing open
|
|
// bracket. Treat it as such.
|
|
if (getLangOpts().ObjC && &II == Ident_super && !InMessageExpression &&
|
|
getCurScope()->isInObjcMethodScope() &&
|
|
((Tok.is(tok::identifier) &&
|
|
(NextToken().is(tok::colon) || NextToken().is(tok::r_square))) ||
|
|
Tok.is(tok::code_completion))) {
|
|
Res = ParseObjCMessageExpressionBody(SourceLocation(), ILoc, nullptr,
|
|
nullptr);
|
|
break;
|
|
}
|
|
|
|
// If we have an Objective-C class name followed by an identifier
|
|
// and either ':' or ']', this is an Objective-C class message
|
|
// send that's missing the opening '['. Recovery
|
|
// appropriately. Also take this path if we're performing code
|
|
// completion after an Objective-C class name.
|
|
if (getLangOpts().ObjC &&
|
|
((Tok.is(tok::identifier) && !InMessageExpression) ||
|
|
Tok.is(tok::code_completion))) {
|
|
const Token& Next = NextToken();
|
|
if (Tok.is(tok::code_completion) ||
|
|
Next.is(tok::colon) || Next.is(tok::r_square))
|
|
if (ParsedType Typ = Actions.getTypeName(II, ILoc, getCurScope()))
|
|
if (Typ.get()->isObjCObjectOrInterfaceType()) {
|
|
// Fake up a Declarator to use with ActOnTypeName.
|
|
DeclSpec DS(AttrFactory);
|
|
DS.SetRangeStart(ILoc);
|
|
DS.SetRangeEnd(ILoc);
|
|
const char *PrevSpec = nullptr;
|
|
unsigned DiagID;
|
|
DS.SetTypeSpecType(TST_typename, ILoc, PrevSpec, DiagID, Typ,
|
|
Actions.getASTContext().getPrintingPolicy());
|
|
|
|
Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext);
|
|
TypeResult Ty = Actions.ActOnTypeName(getCurScope(),
|
|
DeclaratorInfo);
|
|
if (Ty.isInvalid())
|
|
break;
|
|
|
|
Res = ParseObjCMessageExpressionBody(SourceLocation(),
|
|
SourceLocation(),
|
|
Ty.get(), nullptr);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Make sure to pass down the right value for isAddressOfOperand.
|
|
if (isAddressOfOperand && isPostfixExpressionSuffixStart())
|
|
isAddressOfOperand = false;
|
|
|
|
// Function designators are allowed to be undeclared (C99 6.5.1p2), so we
|
|
// need to know whether or not this identifier is a function designator or
|
|
// not.
|
|
UnqualifiedId Name;
|
|
CXXScopeSpec ScopeSpec;
|
|
SourceLocation TemplateKWLoc;
|
|
Token Replacement;
|
|
CastExpressionIdValidator Validator(
|
|
/*Next=*/Tok,
|
|
/*AllowTypes=*/isTypeCast != NotTypeCast,
|
|
/*AllowNonTypes=*/isTypeCast != IsTypeCast);
|
|
Validator.IsAddressOfOperand = isAddressOfOperand;
|
|
if (Tok.isOneOf(tok::periodstar, tok::arrowstar)) {
|
|
Validator.WantExpressionKeywords = false;
|
|
Validator.WantRemainingKeywords = false;
|
|
} else {
|
|
Validator.WantRemainingKeywords = Tok.isNot(tok::r_paren);
|
|
}
|
|
Name.setIdentifier(&II, ILoc);
|
|
Res = Actions.ActOnIdExpression(
|
|
getCurScope(), ScopeSpec, TemplateKWLoc, Name, Tok.is(tok::l_paren),
|
|
isAddressOfOperand, &Validator,
|
|
/*IsInlineAsmIdentifier=*/false,
|
|
Tok.is(tok::r_paren) ? nullptr : &Replacement);
|
|
if (!Res.isInvalid() && Res.isUnset()) {
|
|
UnconsumeToken(Replacement);
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand,
|
|
NotCastExpr, isTypeCast,
|
|
/*isVectorLiteral=*/false,
|
|
NotPrimaryExpression);
|
|
}
|
|
if (!Res.isInvalid() && Tok.is(tok::less))
|
|
checkPotentialAngleBracket(Res);
|
|
break;
|
|
}
|
|
case tok::char_constant: // constant: character-constant
|
|
case tok::wide_char_constant:
|
|
case tok::utf8_char_constant:
|
|
case tok::utf16_char_constant:
|
|
case tok::utf32_char_constant:
|
|
Res = Actions.ActOnCharacterConstant(Tok, /*UDLScope*/getCurScope());
|
|
ConsumeToken();
|
|
break;
|
|
case tok::kw___func__: // primary-expression: __func__ [C99 6.4.2.2]
|
|
case tok::kw___FUNCTION__: // primary-expression: __FUNCTION__ [GNU]
|
|
case tok::kw___FUNCDNAME__: // primary-expression: __FUNCDNAME__ [MS]
|
|
case tok::kw___FUNCSIG__: // primary-expression: __FUNCSIG__ [MS]
|
|
case tok::kw_L__FUNCTION__: // primary-expression: L__FUNCTION__ [MS]
|
|
case tok::kw_L__FUNCSIG__: // primary-expression: L__FUNCSIG__ [MS]
|
|
case tok::kw___PRETTY_FUNCTION__: // primary-expression: __P..Y_F..N__ [GNU]
|
|
Res = Actions.ActOnPredefinedExpr(Tok.getLocation(), SavedKind);
|
|
ConsumeToken();
|
|
break;
|
|
case tok::string_literal: // primary-expression: string-literal
|
|
case tok::wide_string_literal:
|
|
case tok::utf8_string_literal:
|
|
case tok::utf16_string_literal:
|
|
case tok::utf32_string_literal:
|
|
Res = ParseStringLiteralExpression(true);
|
|
break;
|
|
case tok::kw__Generic: // primary-expression: generic-selection [C11 6.5.1]
|
|
Res = ParseGenericSelectionExpression();
|
|
break;
|
|
case tok::kw___builtin_available:
|
|
Res = ParseAvailabilityCheckExpr(Tok.getLocation());
|
|
break;
|
|
case tok::kw___builtin_va_arg:
|
|
case tok::kw___builtin_offsetof:
|
|
case tok::kw___builtin_choose_expr:
|
|
case tok::kw___builtin_astype: // primary-expression: [OCL] as_type()
|
|
case tok::kw___builtin_convertvector:
|
|
case tok::kw___builtin_COLUMN:
|
|
case tok::kw___builtin_FILE:
|
|
case tok::kw___builtin_FUNCTION:
|
|
case tok::kw___builtin_LINE:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
// This parses the complete suffix; we can return early.
|
|
return ParseBuiltinPrimaryExpression();
|
|
case tok::kw___null:
|
|
Res = Actions.ActOnGNUNullExpr(ConsumeToken());
|
|
break;
|
|
|
|
case tok::plusplus: // unary-expression: '++' unary-expression [C99]
|
|
case tok::minusminus: { // unary-expression: '--' unary-expression [C99]
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
// C++ [expr.unary] has:
|
|
// unary-expression:
|
|
// ++ cast-expression
|
|
// -- cast-expression
|
|
Token SavedTok = Tok;
|
|
ConsumeToken();
|
|
|
|
PreferredType.enterUnary(Actions, Tok.getLocation(), SavedTok.getKind(),
|
|
SavedTok.getLocation());
|
|
// One special case is implicitly handled here: if the preceding tokens are
|
|
// an ambiguous cast expression, such as "(T())++", then we recurse to
|
|
// determine whether the '++' is prefix or postfix.
|
|
Res = ParseCastExpression(getLangOpts().CPlusPlus ?
|
|
UnaryExprOnly : AnyCastExpr,
|
|
/*isAddressOfOperand*/false, NotCastExpr,
|
|
NotTypeCast);
|
|
if (NotCastExpr) {
|
|
// If we return with NotCastExpr = true, we must not consume any tokens,
|
|
// so put the token back where we found it.
|
|
assert(Res.isInvalid());
|
|
UnconsumeToken(SavedTok);
|
|
return ExprError();
|
|
}
|
|
if (!Res.isInvalid()) {
|
|
Expr *Arg = Res.get();
|
|
Res = Actions.ActOnUnaryOp(getCurScope(), SavedTok.getLocation(),
|
|
SavedKind, Arg);
|
|
if (Res.isInvalid())
|
|
Res = Actions.CreateRecoveryExpr(SavedTok.getLocation(),
|
|
Arg->getEndLoc(), Arg);
|
|
}
|
|
return Res;
|
|
}
|
|
case tok::amp: { // unary-expression: '&' cast-expression
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
// Special treatment because of member pointers
|
|
SourceLocation SavedLoc = ConsumeToken();
|
|
PreferredType.enterUnary(Actions, Tok.getLocation(), tok::amp, SavedLoc);
|
|
Res = ParseCastExpression(AnyCastExpr, true);
|
|
if (!Res.isInvalid()) {
|
|
Expr *Arg = Res.get();
|
|
Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg);
|
|
if (Res.isInvalid())
|
|
Res = Actions.CreateRecoveryExpr(Tok.getLocation(), Arg->getEndLoc(),
|
|
Arg);
|
|
}
|
|
return Res;
|
|
}
|
|
|
|
case tok::star: // unary-expression: '*' cast-expression
|
|
case tok::plus: // unary-expression: '+' cast-expression
|
|
case tok::minus: // unary-expression: '-' cast-expression
|
|
case tok::tilde: // unary-expression: '~' cast-expression
|
|
case tok::exclaim: // unary-expression: '!' cast-expression
|
|
case tok::kw___real: // unary-expression: '__real' cast-expression [GNU]
|
|
case tok::kw___imag: { // unary-expression: '__imag' cast-expression [GNU]
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
SourceLocation SavedLoc = ConsumeToken();
|
|
PreferredType.enterUnary(Actions, Tok.getLocation(), SavedKind, SavedLoc);
|
|
Res = ParseCastExpression(AnyCastExpr);
|
|
if (!Res.isInvalid()) {
|
|
Expr *Arg = Res.get();
|
|
Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg);
|
|
if (Res.isInvalid())
|
|
Res = Actions.CreateRecoveryExpr(SavedLoc, Arg->getEndLoc(), Arg);
|
|
}
|
|
return Res;
|
|
}
|
|
|
|
case tok::kw_co_await: { // unary-expression: 'co_await' cast-expression
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
SourceLocation CoawaitLoc = ConsumeToken();
|
|
Res = ParseCastExpression(AnyCastExpr);
|
|
if (!Res.isInvalid())
|
|
Res = Actions.ActOnCoawaitExpr(getCurScope(), CoawaitLoc, Res.get());
|
|
return Res;
|
|
}
|
|
|
|
case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU]
|
|
// __extension__ silences extension warnings in the subexpression.
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
ExtensionRAIIObject O(Diags); // Use RAII to do this.
|
|
SourceLocation SavedLoc = ConsumeToken();
|
|
Res = ParseCastExpression(AnyCastExpr);
|
|
if (!Res.isInvalid())
|
|
Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get());
|
|
return Res;
|
|
}
|
|
case tok::kw__Alignof: // unary-expression: '_Alignof' '(' type-name ')'
|
|
if (!getLangOpts().C11)
|
|
Diag(Tok, diag::ext_c11_feature) << Tok.getName();
|
|
LLVM_FALLTHROUGH;
|
|
case tok::kw_alignof: // unary-expression: 'alignof' '(' type-id ')'
|
|
case tok::kw___alignof: // unary-expression: '__alignof' unary-expression
|
|
// unary-expression: '__alignof' '(' type-name ')'
|
|
case tok::kw_sizeof: // unary-expression: 'sizeof' unary-expression
|
|
// unary-expression: 'sizeof' '(' type-name ')'
|
|
case tok::kw_vec_step: // unary-expression: OpenCL 'vec_step' expression
|
|
// unary-expression: '__builtin_omp_required_simd_align' '(' type-name ')'
|
|
case tok::kw___builtin_omp_required_simd_align:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
AllowSuffix = false;
|
|
Res = ParseUnaryExprOrTypeTraitExpression();
|
|
break;
|
|
case tok::ampamp: { // unary-expression: '&&' identifier
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
SourceLocation AmpAmpLoc = ConsumeToken();
|
|
if (Tok.isNot(tok::identifier))
|
|
return ExprError(Diag(Tok, diag::err_expected) << tok::identifier);
|
|
|
|
if (getCurScope()->getFnParent() == nullptr)
|
|
return ExprError(Diag(Tok, diag::err_address_of_label_outside_fn));
|
|
|
|
Diag(AmpAmpLoc, diag::ext_gnu_address_of_label);
|
|
LabelDecl *LD = Actions.LookupOrCreateLabel(Tok.getIdentifierInfo(),
|
|
Tok.getLocation());
|
|
Res = Actions.ActOnAddrLabel(AmpAmpLoc, Tok.getLocation(), LD);
|
|
ConsumeToken();
|
|
AllowSuffix = false;
|
|
break;
|
|
}
|
|
case tok::kw_const_cast:
|
|
case tok::kw_dynamic_cast:
|
|
case tok::kw_reinterpret_cast:
|
|
case tok::kw_static_cast:
|
|
case tok::kw_addrspace_cast:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseCXXCasts();
|
|
break;
|
|
case tok::kw___builtin_bit_cast:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseBuiltinBitCast();
|
|
break;
|
|
case tok::kw_typeid:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseCXXTypeid();
|
|
break;
|
|
case tok::kw___uuidof:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseCXXUuidof();
|
|
break;
|
|
case tok::kw_this:
|
|
Res = ParseCXXThis();
|
|
break;
|
|
case tok::kw___builtin_unique_stable_name:
|
|
Res = ParseUniqueStableNameExpression();
|
|
break;
|
|
case tok::annot_typename:
|
|
if (isStartOfObjCClassMessageMissingOpenBracket()) {
|
|
TypeResult Type = getTypeAnnotation(Tok);
|
|
|
|
// Fake up a Declarator to use with ActOnTypeName.
|
|
DeclSpec DS(AttrFactory);
|
|
DS.SetRangeStart(Tok.getLocation());
|
|
DS.SetRangeEnd(Tok.getLastLoc());
|
|
|
|
const char *PrevSpec = nullptr;
|
|
unsigned DiagID;
|
|
DS.SetTypeSpecType(TST_typename, Tok.getAnnotationEndLoc(),
|
|
PrevSpec, DiagID, Type,
|
|
Actions.getASTContext().getPrintingPolicy());
|
|
|
|
Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext);
|
|
TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
|
|
if (Ty.isInvalid())
|
|
break;
|
|
|
|
ConsumeAnnotationToken();
|
|
Res = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(),
|
|
Ty.get(), nullptr);
|
|
break;
|
|
}
|
|
LLVM_FALLTHROUGH;
|
|
|
|
case tok::annot_decltype:
|
|
case tok::kw_char:
|
|
case tok::kw_wchar_t:
|
|
case tok::kw_char8_t:
|
|
case tok::kw_char16_t:
|
|
case tok::kw_char32_t:
|
|
case tok::kw_bool:
|
|
case tok::kw_short:
|
|
case tok::kw_int:
|
|
case tok::kw_long:
|
|
case tok::kw___int64:
|
|
case tok::kw___int128:
|
|
case tok::kw__ExtInt:
|
|
case tok::kw_signed:
|
|
case tok::kw_unsigned:
|
|
case tok::kw_half:
|
|
case tok::kw_float:
|
|
case tok::kw_double:
|
|
case tok::kw___bf16:
|
|
case tok::kw__Float16:
|
|
case tok::kw___float128:
|
|
case tok::kw_void:
|
|
case tok::kw_typename:
|
|
case tok::kw_typeof:
|
|
case tok::kw___vector:
|
|
#define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
|
|
#include "clang/Basic/OpenCLImageTypes.def"
|
|
{
|
|
if (!getLangOpts().CPlusPlus) {
|
|
Diag(Tok, diag::err_expected_expression);
|
|
return ExprError();
|
|
}
|
|
|
|
// Everything henceforth is a postfix-expression.
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
|
|
if (SavedKind == tok::kw_typename) {
|
|
// postfix-expression: typename-specifier '(' expression-list[opt] ')'
|
|
// typename-specifier braced-init-list
|
|
if (TryAnnotateTypeOrScopeToken())
|
|
return ExprError();
|
|
|
|
if (!Actions.isSimpleTypeSpecifier(Tok.getKind()))
|
|
// We are trying to parse a simple-type-specifier but might not get such
|
|
// a token after error recovery.
|
|
return ExprError();
|
|
}
|
|
|
|
// postfix-expression: simple-type-specifier '(' expression-list[opt] ')'
|
|
// simple-type-specifier braced-init-list
|
|
//
|
|
DeclSpec DS(AttrFactory);
|
|
|
|
ParseCXXSimpleTypeSpecifier(DS);
|
|
if (Tok.isNot(tok::l_paren) &&
|
|
(!getLangOpts().CPlusPlus11 || Tok.isNot(tok::l_brace)))
|
|
return ExprError(Diag(Tok, diag::err_expected_lparen_after_type)
|
|
<< DS.getSourceRange());
|
|
|
|
if (Tok.is(tok::l_brace))
|
|
Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
|
|
|
|
Res = ParseCXXTypeConstructExpression(DS);
|
|
break;
|
|
}
|
|
|
|
case tok::annot_cxxscope: { // [C++] id-expression: qualified-id
|
|
// If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
|
|
// (We can end up in this situation after tentative parsing.)
|
|
if (TryAnnotateTypeOrScopeToken())
|
|
return ExprError();
|
|
if (!Tok.is(tok::annot_cxxscope))
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
|
|
isTypeCast, isVectorLiteral,
|
|
NotPrimaryExpression);
|
|
|
|
Token Next = NextToken();
|
|
if (Next.is(tok::annot_template_id)) {
|
|
TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
|
|
if (TemplateId->Kind == TNK_Type_template) {
|
|
// We have a qualified template-id that we know refers to a
|
|
// type, translate it into a type and continue parsing as a
|
|
// cast expression.
|
|
CXXScopeSpec SS;
|
|
ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false,
|
|
/*EnteringContext=*/false);
|
|
AnnotateTemplateIdTokenAsType(SS);
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
|
|
isTypeCast, isVectorLiteral,
|
|
NotPrimaryExpression);
|
|
}
|
|
}
|
|
|
|
// Parse as an id-expression.
|
|
Res = ParseCXXIdExpression(isAddressOfOperand);
|
|
break;
|
|
}
|
|
|
|
case tok::annot_template_id: { // [C++] template-id
|
|
TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
|
|
if (TemplateId->Kind == TNK_Type_template) {
|
|
// We have a template-id that we know refers to a type,
|
|
// translate it into a type and continue parsing as a cast
|
|
// expression.
|
|
CXXScopeSpec SS;
|
|
AnnotateTemplateIdTokenAsType(SS);
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand,
|
|
NotCastExpr, isTypeCast, isVectorLiteral,
|
|
NotPrimaryExpression);
|
|
}
|
|
|
|
// Fall through to treat the template-id as an id-expression.
|
|
LLVM_FALLTHROUGH;
|
|
}
|
|
|
|
case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id
|
|
Res = ParseCXXIdExpression(isAddressOfOperand);
|
|
break;
|
|
|
|
case tok::coloncolon: {
|
|
// ::foo::bar -> global qualified name etc. If TryAnnotateTypeOrScopeToken
|
|
// annotates the token, tail recurse.
|
|
if (TryAnnotateTypeOrScopeToken())
|
|
return ExprError();
|
|
if (!Tok.is(tok::coloncolon))
|
|
return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast,
|
|
isVectorLiteral, NotPrimaryExpression);
|
|
|
|
// ::new -> [C++] new-expression
|
|
// ::delete -> [C++] delete-expression
|
|
SourceLocation CCLoc = ConsumeToken();
|
|
if (Tok.is(tok::kw_new)) {
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseCXXNewExpression(true, CCLoc);
|
|
AllowSuffix = false;
|
|
break;
|
|
}
|
|
if (Tok.is(tok::kw_delete)) {
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseCXXDeleteExpression(true, CCLoc);
|
|
AllowSuffix = false;
|
|
break;
|
|
}
|
|
|
|
// This is not a type name or scope specifier, it is an invalid expression.
|
|
Diag(CCLoc, diag::err_expected_expression);
|
|
return ExprError();
|
|
}
|
|
|
|
case tok::kw_new: // [C++] new-expression
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseCXXNewExpression(false, Tok.getLocation());
|
|
AllowSuffix = false;
|
|
break;
|
|
|
|
case tok::kw_delete: // [C++] delete-expression
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseCXXDeleteExpression(false, Tok.getLocation());
|
|
AllowSuffix = false;
|
|
break;
|
|
|
|
case tok::kw_requires: // [C++2a] requires-expression
|
|
Res = ParseRequiresExpression();
|
|
AllowSuffix = false;
|
|
break;
|
|
|
|
case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')'
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Diag(Tok, diag::warn_cxx98_compat_noexcept_expr);
|
|
SourceLocation KeyLoc = ConsumeToken();
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
|
|
if (T.expectAndConsume(diag::err_expected_lparen_after, "noexcept"))
|
|
return ExprError();
|
|
// C++11 [expr.unary.noexcept]p1:
|
|
// The noexcept operator determines whether the evaluation of its operand,
|
|
// which is an unevaluated operand, can throw an exception.
|
|
EnterExpressionEvaluationContext Unevaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::Unevaluated);
|
|
Res = ParseExpression();
|
|
|
|
T.consumeClose();
|
|
|
|
if (!Res.isInvalid())
|
|
Res = Actions.ActOnNoexceptExpr(KeyLoc, T.getOpenLocation(), Res.get(),
|
|
T.getCloseLocation());
|
|
AllowSuffix = false;
|
|
break;
|
|
}
|
|
|
|
#define TYPE_TRAIT(N,Spelling,K) \
|
|
case tok::kw_##Spelling:
|
|
#include "clang/Basic/TokenKinds.def"
|
|
Res = ParseTypeTrait();
|
|
break;
|
|
|
|
case tok::kw___array_rank:
|
|
case tok::kw___array_extent:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseArrayTypeTrait();
|
|
break;
|
|
|
|
case tok::kw___is_lvalue_expr:
|
|
case tok::kw___is_rvalue_expr:
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseExpressionTrait();
|
|
break;
|
|
|
|
case tok::at: {
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
SourceLocation AtLoc = ConsumeToken();
|
|
return ParseObjCAtExpression(AtLoc);
|
|
}
|
|
case tok::caret:
|
|
Res = ParseBlockLiteralExpression();
|
|
break;
|
|
case tok::code_completion: {
|
|
Actions.CodeCompleteExpression(getCurScope(),
|
|
PreferredType.get(Tok.getLocation()));
|
|
cutOffParsing();
|
|
return ExprError();
|
|
}
|
|
case tok::l_square:
|
|
if (getLangOpts().CPlusPlus11) {
|
|
if (getLangOpts().ObjC) {
|
|
// C++11 lambda expressions and Objective-C message sends both start with a
|
|
// square bracket. There are three possibilities here:
|
|
// we have a valid lambda expression, we have an invalid lambda
|
|
// expression, or we have something that doesn't appear to be a lambda.
|
|
// If we're in the last case, we fall back to ParseObjCMessageExpression.
|
|
Res = TryParseLambdaExpression();
|
|
if (!Res.isInvalid() && !Res.get()) {
|
|
// We assume Objective-C++ message expressions are not
|
|
// primary-expressions.
|
|
if (NotPrimaryExpression)
|
|
*NotPrimaryExpression = true;
|
|
Res = ParseObjCMessageExpression();
|
|
}
|
|
break;
|
|
}
|
|
Res = ParseLambdaExpression();
|
|
break;
|
|
}
|
|
if (getLangOpts().ObjC) {
|
|
Res = ParseObjCMessageExpression();
|
|
break;
|
|
}
|
|
LLVM_FALLTHROUGH;
|
|
default:
|
|
NotCastExpr = true;
|
|
return ExprError();
|
|
}
|
|
|
|
// Check to see whether Res is a function designator only. If it is and we
|
|
// are compiling for OpenCL, we need to return an error as this implies
|
|
// that the address of the function is being taken, which is illegal in CL.
|
|
|
|
if (ParseKind == PrimaryExprOnly)
|
|
// This is strictly a primary-expression - no postfix-expr pieces should be
|
|
// parsed.
|
|
return Res;
|
|
|
|
if (!AllowSuffix) {
|
|
// FIXME: Don't parse a primary-expression suffix if we encountered a parse
|
|
// error already.
|
|
if (Res.isInvalid())
|
|
return Res;
|
|
|
|
switch (Tok.getKind()) {
|
|
case tok::l_square:
|
|
case tok::l_paren:
|
|
case tok::plusplus:
|
|
case tok::minusminus:
|
|
// "expected ';'" or similar is probably the right diagnostic here. Let
|
|
// the caller decide what to do.
|
|
if (Tok.isAtStartOfLine())
|
|
return Res;
|
|
|
|
LLVM_FALLTHROUGH;
|
|
case tok::period:
|
|
case tok::arrow:
|
|
break;
|
|
|
|
default:
|
|
return Res;
|
|
}
|
|
|
|
// This was a unary-expression for which a postfix-expression suffix is
|
|
// not permitted by the grammar (eg, a sizeof expression or
|
|
// new-expression or similar). Diagnose but parse the suffix anyway.
|
|
Diag(Tok.getLocation(), diag::err_postfix_after_unary_requires_parens)
|
|
<< Tok.getKind() << Res.get()->getSourceRange()
|
|
<< FixItHint::CreateInsertion(Res.get()->getBeginLoc(), "(")
|
|
<< FixItHint::CreateInsertion(PP.getLocForEndOfToken(PrevTokLocation),
|
|
")");
|
|
}
|
|
|
|
// These can be followed by postfix-expr pieces.
|
|
PreferredType = SavedType;
|
|
Res = ParsePostfixExpressionSuffix(Res);
|
|
if (getLangOpts().OpenCL)
|
|
if (Expr *PostfixExpr = Res.get()) {
|
|
QualType Ty = PostfixExpr->getType();
|
|
if (!Ty.isNull() && Ty->isFunctionType()) {
|
|
Diag(PostfixExpr->getExprLoc(),
|
|
diag::err_opencl_taking_function_address_parser);
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
return Res;
|
|
}
|
|
|
|
/// Once the leading part of a postfix-expression is parsed, this
|
|
/// method parses any suffixes that apply.
|
|
///
|
|
/// \verbatim
|
|
/// postfix-expression: [C99 6.5.2]
|
|
/// primary-expression
|
|
/// postfix-expression '[' expression ']'
|
|
/// postfix-expression '[' braced-init-list ']'
|
|
/// postfix-expression '(' argument-expression-list[opt] ')'
|
|
/// postfix-expression '.' identifier
|
|
/// postfix-expression '->' identifier
|
|
/// postfix-expression '++'
|
|
/// postfix-expression '--'
|
|
/// '(' type-name ')' '{' initializer-list '}'
|
|
/// '(' type-name ')' '{' initializer-list ',' '}'
|
|
///
|
|
/// argument-expression-list: [C99 6.5.2]
|
|
/// argument-expression ...[opt]
|
|
/// argument-expression-list ',' assignment-expression ...[opt]
|
|
/// \endverbatim
|
|
ExprResult
|
|
Parser::ParsePostfixExpressionSuffix(ExprResult LHS) {
|
|
// Now that the primary-expression piece of the postfix-expression has been
|
|
// parsed, see if there are any postfix-expression pieces here.
|
|
SourceLocation Loc;
|
|
auto SavedType = PreferredType;
|
|
while (1) {
|
|
// Each iteration relies on preferred type for the whole expression.
|
|
PreferredType = SavedType;
|
|
switch (Tok.getKind()) {
|
|
case tok::code_completion:
|
|
if (InMessageExpression)
|
|
return LHS;
|
|
|
|
Actions.CodeCompletePostfixExpression(
|
|
getCurScope(), LHS, PreferredType.get(Tok.getLocation()));
|
|
cutOffParsing();
|
|
return ExprError();
|
|
|
|
case tok::identifier:
|
|
// If we see identifier: after an expression, and we're not already in a
|
|
// message send, then this is probably a message send with a missing
|
|
// opening bracket '['.
|
|
if (getLangOpts().ObjC && !InMessageExpression &&
|
|
(NextToken().is(tok::colon) || NextToken().is(tok::r_square))) {
|
|
LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(),
|
|
nullptr, LHS.get());
|
|
break;
|
|
}
|
|
// Fall through; this isn't a message send.
|
|
LLVM_FALLTHROUGH;
|
|
|
|
default: // Not a postfix-expression suffix.
|
|
return LHS;
|
|
case tok::l_square: { // postfix-expression: p-e '[' expression ']'
|
|
// If we have a array postfix expression that starts on a new line and
|
|
// Objective-C is enabled, it is highly likely that the user forgot a
|
|
// semicolon after the base expression and that the array postfix-expr is
|
|
// actually another message send. In this case, do some look-ahead to see
|
|
// if the contents of the square brackets are obviously not a valid
|
|
// expression and recover by pretending there is no suffix.
|
|
if (getLangOpts().ObjC && Tok.isAtStartOfLine() &&
|
|
isSimpleObjCMessageExpression())
|
|
return LHS;
|
|
|
|
// Reject array indices starting with a lambda-expression. '[[' is
|
|
// reserved for attributes.
|
|
if (CheckProhibitedCXX11Attribute()) {
|
|
(void)Actions.CorrectDelayedTyposInExpr(LHS);
|
|
return ExprError();
|
|
}
|
|
|
|
BalancedDelimiterTracker T(*this, tok::l_square);
|
|
T.consumeOpen();
|
|
Loc = T.getOpenLocation();
|
|
ExprResult Idx, Length, Stride;
|
|
SourceLocation ColonLocFirst, ColonLocSecond;
|
|
PreferredType.enterSubscript(Actions, Tok.getLocation(), LHS.get());
|
|
if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
|
|
Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
|
|
Idx = ParseBraceInitializer();
|
|
} else if (getLangOpts().OpenMP) {
|
|
ColonProtectionRAIIObject RAII(*this);
|
|
// Parse [: or [ expr or [ expr :
|
|
if (!Tok.is(tok::colon)) {
|
|
// [ expr
|
|
Idx = ParseExpression();
|
|
}
|
|
if (Tok.is(tok::colon)) {
|
|
// Consume ':'
|
|
ColonLocFirst = ConsumeToken();
|
|
if (Tok.isNot(tok::r_square) &&
|
|
(getLangOpts().OpenMP < 50 ||
|
|
((Tok.isNot(tok::colon) && getLangOpts().OpenMP >= 50))))
|
|
Length = ParseExpression();
|
|
}
|
|
if (getLangOpts().OpenMP >= 50 &&
|
|
(OMPClauseKind == llvm::omp::Clause::OMPC_to ||
|
|
OMPClauseKind == llvm::omp::Clause::OMPC_from) &&
|
|
Tok.is(tok::colon)) {
|
|
// Consume ':'
|
|
ColonLocSecond = ConsumeToken();
|
|
if (Tok.isNot(tok::r_square)) {
|
|
Stride = ParseExpression();
|
|
}
|
|
}
|
|
} else
|
|
Idx = ParseExpression();
|
|
|
|
SourceLocation RLoc = Tok.getLocation();
|
|
|
|
LHS = Actions.CorrectDelayedTyposInExpr(LHS);
|
|
Idx = Actions.CorrectDelayedTyposInExpr(Idx);
|
|
Length = Actions.CorrectDelayedTyposInExpr(Length);
|
|
if (!LHS.isInvalid() && !Idx.isInvalid() && !Length.isInvalid() &&
|
|
!Stride.isInvalid() && Tok.is(tok::r_square)) {
|
|
if (ColonLocFirst.isValid() || ColonLocSecond.isValid()) {
|
|
LHS = Actions.ActOnOMPArraySectionExpr(
|
|
LHS.get(), Loc, Idx.get(), ColonLocFirst, ColonLocSecond,
|
|
Length.get(), Stride.get(), RLoc);
|
|
} else {
|
|
LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.get(), Loc,
|
|
Idx.get(), RLoc);
|
|
}
|
|
} else {
|
|
LHS = ExprError();
|
|
Idx = ExprError();
|
|
}
|
|
|
|
// Match the ']'.
|
|
T.consumeClose();
|
|
break;
|
|
}
|
|
|
|
case tok::l_paren: // p-e: p-e '(' argument-expression-list[opt] ')'
|
|
case tok::lesslessless: { // p-e: p-e '<<<' argument-expression-list '>>>'
|
|
// '(' argument-expression-list[opt] ')'
|
|
tok::TokenKind OpKind = Tok.getKind();
|
|
InMessageExpressionRAIIObject InMessage(*this, false);
|
|
|
|
Expr *ExecConfig = nullptr;
|
|
|
|
BalancedDelimiterTracker PT(*this, tok::l_paren);
|
|
|
|
if (OpKind == tok::lesslessless) {
|
|
ExprVector ExecConfigExprs;
|
|
CommaLocsTy ExecConfigCommaLocs;
|
|
SourceLocation OpenLoc = ConsumeToken();
|
|
|
|
if (ParseSimpleExpressionList(ExecConfigExprs, ExecConfigCommaLocs)) {
|
|
(void)Actions.CorrectDelayedTyposInExpr(LHS);
|
|
LHS = ExprError();
|
|
}
|
|
|
|
SourceLocation CloseLoc;
|
|
if (TryConsumeToken(tok::greatergreatergreater, CloseLoc)) {
|
|
} else if (LHS.isInvalid()) {
|
|
SkipUntil(tok::greatergreatergreater, StopAtSemi);
|
|
} else {
|
|
// There was an error closing the brackets
|
|
Diag(Tok, diag::err_expected) << tok::greatergreatergreater;
|
|
Diag(OpenLoc, diag::note_matching) << tok::lesslessless;
|
|
SkipUntil(tok::greatergreatergreater, StopAtSemi);
|
|
LHS = ExprError();
|
|
}
|
|
|
|
if (!LHS.isInvalid()) {
|
|
if (ExpectAndConsume(tok::l_paren))
|
|
LHS = ExprError();
|
|
else
|
|
Loc = PrevTokLocation;
|
|
}
|
|
|
|
if (!LHS.isInvalid()) {
|
|
ExprResult ECResult = Actions.ActOnCUDAExecConfigExpr(getCurScope(),
|
|
OpenLoc,
|
|
ExecConfigExprs,
|
|
CloseLoc);
|
|
if (ECResult.isInvalid())
|
|
LHS = ExprError();
|
|
else
|
|
ExecConfig = ECResult.get();
|
|
}
|
|
} else {
|
|
PT.consumeOpen();
|
|
Loc = PT.getOpenLocation();
|
|
}
|
|
|
|
ExprVector ArgExprs;
|
|
CommaLocsTy CommaLocs;
|
|
auto RunSignatureHelp = [&]() -> QualType {
|
|
QualType PreferredType = Actions.ProduceCallSignatureHelp(
|
|
getCurScope(), LHS.get(), ArgExprs, PT.getOpenLocation());
|
|
CalledSignatureHelp = true;
|
|
return PreferredType;
|
|
};
|
|
if (OpKind == tok::l_paren || !LHS.isInvalid()) {
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
if (ParseExpressionList(ArgExprs, CommaLocs, [&] {
|
|
PreferredType.enterFunctionArgument(Tok.getLocation(),
|
|
RunSignatureHelp);
|
|
})) {
|
|
(void)Actions.CorrectDelayedTyposInExpr(LHS);
|
|
// If we got an error when parsing expression list, we don't call
|
|
// the CodeCompleteCall handler inside the parser. So call it here
|
|
// to make sure we get overload suggestions even when we are in the
|
|
// middle of a parameter.
|
|
if (PP.isCodeCompletionReached() && !CalledSignatureHelp)
|
|
RunSignatureHelp();
|
|
LHS = ExprError();
|
|
} else if (LHS.isInvalid()) {
|
|
for (auto &E : ArgExprs)
|
|
Actions.CorrectDelayedTyposInExpr(E);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Match the ')'.
|
|
if (LHS.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
} else if (Tok.isNot(tok::r_paren)) {
|
|
bool HadDelayedTypo = false;
|
|
if (Actions.CorrectDelayedTyposInExpr(LHS).get() != LHS.get())
|
|
HadDelayedTypo = true;
|
|
for (auto &E : ArgExprs)
|
|
if (Actions.CorrectDelayedTyposInExpr(E).get() != E)
|
|
HadDelayedTypo = true;
|
|
// If there were delayed typos in the LHS or ArgExprs, call SkipUntil
|
|
// instead of PT.consumeClose() to avoid emitting extra diagnostics for
|
|
// the unmatched l_paren.
|
|
if (HadDelayedTypo)
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
else
|
|
PT.consumeClose();
|
|
LHS = ExprError();
|
|
} else {
|
|
assert(
|
|
(ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) &&
|
|
"Unexpected number of commas!");
|
|
Expr *Fn = LHS.get();
|
|
SourceLocation RParLoc = Tok.getLocation();
|
|
LHS = Actions.ActOnCallExpr(getCurScope(), Fn, Loc, ArgExprs, RParLoc,
|
|
ExecConfig);
|
|
if (LHS.isInvalid()) {
|
|
ArgExprs.insert(ArgExprs.begin(), Fn);
|
|
LHS =
|
|
Actions.CreateRecoveryExpr(Fn->getBeginLoc(), RParLoc, ArgExprs);
|
|
}
|
|
PT.consumeClose();
|
|
}
|
|
|
|
break;
|
|
}
|
|
case tok::arrow:
|
|
case tok::period: {
|
|
// postfix-expression: p-e '->' template[opt] id-expression
|
|
// postfix-expression: p-e '.' template[opt] id-expression
|
|
tok::TokenKind OpKind = Tok.getKind();
|
|
SourceLocation OpLoc = ConsumeToken(); // Eat the "." or "->" token.
|
|
|
|
CXXScopeSpec SS;
|
|
ParsedType ObjectType;
|
|
bool MayBePseudoDestructor = false;
|
|
Expr* OrigLHS = !LHS.isInvalid() ? LHS.get() : nullptr;
|
|
|
|
PreferredType.enterMemAccess(Actions, Tok.getLocation(), OrigLHS);
|
|
|
|
if (getLangOpts().CPlusPlus && !LHS.isInvalid()) {
|
|
Expr *Base = OrigLHS;
|
|
const Type* BaseType = Base->getType().getTypePtrOrNull();
|
|
if (BaseType && Tok.is(tok::l_paren) &&
|
|
(BaseType->isFunctionType() ||
|
|
BaseType->isSpecificPlaceholderType(BuiltinType::BoundMember))) {
|
|
Diag(OpLoc, diag::err_function_is_not_record)
|
|
<< OpKind << Base->getSourceRange()
|
|
<< FixItHint::CreateRemoval(OpLoc);
|
|
return ParsePostfixExpressionSuffix(Base);
|
|
}
|
|
|
|
LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), Base, OpLoc,
|
|
OpKind, ObjectType,
|
|
MayBePseudoDestructor);
|
|
if (LHS.isInvalid()) {
|
|
// Clang will try to perform expression based completion as a
|
|
// fallback, which is confusing in case of member references. So we
|
|
// stop here without any completions.
|
|
if (Tok.is(tok::code_completion)) {
|
|
cutOffParsing();
|
|
return ExprError();
|
|
}
|
|
break;
|
|
}
|
|
ParseOptionalCXXScopeSpecifier(
|
|
SS, ObjectType, LHS.get() && LHS.get()->containsErrors(),
|
|
/*EnteringContext=*/false, &MayBePseudoDestructor);
|
|
if (SS.isNotEmpty())
|
|
ObjectType = nullptr;
|
|
}
|
|
|
|
if (Tok.is(tok::code_completion)) {
|
|
tok::TokenKind CorrectedOpKind =
|
|
OpKind == tok::arrow ? tok::period : tok::arrow;
|
|
ExprResult CorrectedLHS(/*Invalid=*/true);
|
|
if (getLangOpts().CPlusPlus && OrigLHS) {
|
|
// FIXME: Creating a TentativeAnalysisScope from outside Sema is a
|
|
// hack.
|
|
Sema::TentativeAnalysisScope Trap(Actions);
|
|
CorrectedLHS = Actions.ActOnStartCXXMemberReference(
|
|
getCurScope(), OrigLHS, OpLoc, CorrectedOpKind, ObjectType,
|
|
MayBePseudoDestructor);
|
|
}
|
|
|
|
Expr *Base = LHS.get();
|
|
Expr *CorrectedBase = CorrectedLHS.get();
|
|
if (!CorrectedBase && !getLangOpts().CPlusPlus)
|
|
CorrectedBase = Base;
|
|
|
|
// Code completion for a member access expression.
|
|
Actions.CodeCompleteMemberReferenceExpr(
|
|
getCurScope(), Base, CorrectedBase, OpLoc, OpKind == tok::arrow,
|
|
Base && ExprStatementTokLoc == Base->getBeginLoc(),
|
|
PreferredType.get(Tok.getLocation()));
|
|
|
|
cutOffParsing();
|
|
return ExprError();
|
|
}
|
|
|
|
if (MayBePseudoDestructor && !LHS.isInvalid()) {
|
|
LHS = ParseCXXPseudoDestructor(LHS.get(), OpLoc, OpKind, SS,
|
|
ObjectType);
|
|
break;
|
|
}
|
|
|
|
// Either the action has told us that this cannot be a
|
|
// pseudo-destructor expression (based on the type of base
|
|
// expression), or we didn't see a '~' in the right place. We
|
|
// can still parse a destructor name here, but in that case it
|
|
// names a real destructor.
|
|
// Allow explicit constructor calls in Microsoft mode.
|
|
// FIXME: Add support for explicit call of template constructor.
|
|
SourceLocation TemplateKWLoc;
|
|
UnqualifiedId Name;
|
|
if (getLangOpts().ObjC && OpKind == tok::period &&
|
|
Tok.is(tok::kw_class)) {
|
|
// Objective-C++:
|
|
// After a '.' in a member access expression, treat the keyword
|
|
// 'class' as if it were an identifier.
|
|
//
|
|
// This hack allows property access to the 'class' method because it is
|
|
// such a common method name. For other C++ keywords that are
|
|
// Objective-C method names, one must use the message send syntax.
|
|
IdentifierInfo *Id = Tok.getIdentifierInfo();
|
|
SourceLocation Loc = ConsumeToken();
|
|
Name.setIdentifier(Id, Loc);
|
|
} else if (ParseUnqualifiedId(
|
|
SS, ObjectType, LHS.get() && LHS.get()->containsErrors(),
|
|
/*EnteringContext=*/false,
|
|
/*AllowDestructorName=*/true,
|
|
/*AllowConstructorName=*/
|
|
getLangOpts().MicrosoftExt && SS.isNotEmpty(),
|
|
/*AllowDeductionGuide=*/false, &TemplateKWLoc, Name)) {
|
|
(void)Actions.CorrectDelayedTyposInExpr(LHS);
|
|
LHS = ExprError();
|
|
}
|
|
|
|
if (!LHS.isInvalid())
|
|
LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.get(), OpLoc,
|
|
OpKind, SS, TemplateKWLoc, Name,
|
|
CurParsedObjCImpl ? CurParsedObjCImpl->Dcl
|
|
: nullptr);
|
|
if (!LHS.isInvalid()) {
|
|
if (Tok.is(tok::less))
|
|
checkPotentialAngleBracket(LHS);
|
|
} else if (OrigLHS && Name.isValid()) {
|
|
// Preserve the LHS if the RHS is an invalid member.
|
|
LHS = Actions.CreateRecoveryExpr(OrigLHS->getBeginLoc(),
|
|
Name.getEndLoc(), {OrigLHS});
|
|
}
|
|
break;
|
|
}
|
|
case tok::plusplus: // postfix-expression: postfix-expression '++'
|
|
case tok::minusminus: // postfix-expression: postfix-expression '--'
|
|
if (!LHS.isInvalid()) {
|
|
Expr *Arg = LHS.get();
|
|
LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(),
|
|
Tok.getKind(), Arg);
|
|
if (LHS.isInvalid())
|
|
LHS = Actions.CreateRecoveryExpr(Arg->getBeginLoc(),
|
|
Tok.getLocation(), Arg);
|
|
}
|
|
ConsumeToken();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseExprAfterUnaryExprOrTypeTrait - We parsed a typeof/sizeof/alignof/
|
|
/// vec_step and we are at the start of an expression or a parenthesized
|
|
/// type-id. OpTok is the operand token (typeof/sizeof/alignof). Returns the
|
|
/// expression (isCastExpr == false) or the type (isCastExpr == true).
|
|
///
|
|
/// \verbatim
|
|
/// unary-expression: [C99 6.5.3]
|
|
/// 'sizeof' unary-expression
|
|
/// 'sizeof' '(' type-name ')'
|
|
/// [GNU] '__alignof' unary-expression
|
|
/// [GNU] '__alignof' '(' type-name ')'
|
|
/// [C11] '_Alignof' '(' type-name ')'
|
|
/// [C++0x] 'alignof' '(' type-id ')'
|
|
///
|
|
/// [GNU] typeof-specifier:
|
|
/// typeof ( expressions )
|
|
/// typeof ( type-name )
|
|
/// [GNU/C++] typeof unary-expression
|
|
///
|
|
/// [OpenCL 1.1 6.11.12] vec_step built-in function:
|
|
/// vec_step ( expressions )
|
|
/// vec_step ( type-name )
|
|
/// \endverbatim
|
|
ExprResult
|
|
Parser::ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok,
|
|
bool &isCastExpr,
|
|
ParsedType &CastTy,
|
|
SourceRange &CastRange) {
|
|
|
|
assert(OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof,
|
|
tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step,
|
|
tok::kw___builtin_omp_required_simd_align) &&
|
|
"Not a typeof/sizeof/alignof/vec_step expression!");
|
|
|
|
ExprResult Operand;
|
|
|
|
// If the operand doesn't start with an '(', it must be an expression.
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
// If construct allows a form without parenthesis, user may forget to put
|
|
// pathenthesis around type name.
|
|
if (OpTok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
|
|
tok::kw__Alignof)) {
|
|
if (isTypeIdUnambiguously()) {
|
|
DeclSpec DS(AttrFactory);
|
|
ParseSpecifierQualifierList(DS);
|
|
Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext);
|
|
ParseDeclarator(DeclaratorInfo);
|
|
|
|
SourceLocation LParenLoc = PP.getLocForEndOfToken(OpTok.getLocation());
|
|
SourceLocation RParenLoc = PP.getLocForEndOfToken(PrevTokLocation);
|
|
Diag(LParenLoc, diag::err_expected_parentheses_around_typename)
|
|
<< OpTok.getName()
|
|
<< FixItHint::CreateInsertion(LParenLoc, "(")
|
|
<< FixItHint::CreateInsertion(RParenLoc, ")");
|
|
isCastExpr = true;
|
|
return ExprEmpty();
|
|
}
|
|
}
|
|
|
|
isCastExpr = false;
|
|
if (OpTok.is(tok::kw_typeof) && !getLangOpts().CPlusPlus) {
|
|
Diag(Tok, diag::err_expected_after) << OpTok.getIdentifierInfo()
|
|
<< tok::l_paren;
|
|
return ExprError();
|
|
}
|
|
|
|
Operand = ParseCastExpression(UnaryExprOnly);
|
|
} else {
|
|
// If it starts with a '(', we know that it is either a parenthesized
|
|
// type-name, or it is a unary-expression that starts with a compound
|
|
// literal, or starts with a primary-expression that is a parenthesized
|
|
// expression.
|
|
ParenParseOption ExprType = CastExpr;
|
|
SourceLocation LParenLoc = Tok.getLocation(), RParenLoc;
|
|
|
|
Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/,
|
|
false, CastTy, RParenLoc);
|
|
CastRange = SourceRange(LParenLoc, RParenLoc);
|
|
|
|
// If ParseParenExpression parsed a '(typename)' sequence only, then this is
|
|
// a type.
|
|
if (ExprType == CastExpr) {
|
|
isCastExpr = true;
|
|
return ExprEmpty();
|
|
}
|
|
|
|
if (getLangOpts().CPlusPlus || OpTok.isNot(tok::kw_typeof)) {
|
|
// GNU typeof in C requires the expression to be parenthesized. Not so for
|
|
// sizeof/alignof or in C++. Therefore, the parenthesized expression is
|
|
// the start of a unary-expression, but doesn't include any postfix
|
|
// pieces. Parse these now if present.
|
|
if (!Operand.isInvalid())
|
|
Operand = ParsePostfixExpressionSuffix(Operand.get());
|
|
}
|
|
}
|
|
|
|
// If we get here, the operand to the typeof/sizeof/alignof was an expression.
|
|
isCastExpr = false;
|
|
return Operand;
|
|
}
|
|
|
|
|
|
ExprResult Parser::ParseUniqueStableNameExpression() {
|
|
assert(Tok.is(tok::kw___builtin_unique_stable_name) &&
|
|
"Not __bulitin_unique_stable_name");
|
|
|
|
SourceLocation OpLoc = ConsumeToken();
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
|
|
// typeid expressions are always parenthesized.
|
|
if (T.expectAndConsume(diag::err_expected_lparen_after,
|
|
"__builtin_unique_stable_name"))
|
|
return ExprError();
|
|
|
|
if (isTypeIdInParens()) {
|
|
TypeResult Ty = ParseTypeName();
|
|
T.consumeClose();
|
|
|
|
if (Ty.isInvalid())
|
|
return ExprError();
|
|
|
|
return Actions.ActOnUniqueStableNameExpr(OpLoc, T.getOpenLocation(),
|
|
T.getCloseLocation(), Ty.get());
|
|
}
|
|
|
|
EnterExpressionEvaluationContext Unevaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::Unevaluated);
|
|
ExprResult Result = ParseExpression();
|
|
|
|
if (Result.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return Result;
|
|
}
|
|
|
|
T.consumeClose();
|
|
return Actions.ActOnUniqueStableNameExpr(OpLoc, T.getOpenLocation(),
|
|
T.getCloseLocation(), Result.get());
|
|
}
|
|
|
|
/// Parse a sizeof or alignof expression.
|
|
///
|
|
/// \verbatim
|
|
/// unary-expression: [C99 6.5.3]
|
|
/// 'sizeof' unary-expression
|
|
/// 'sizeof' '(' type-name ')'
|
|
/// [C++11] 'sizeof' '...' '(' identifier ')'
|
|
/// [GNU] '__alignof' unary-expression
|
|
/// [GNU] '__alignof' '(' type-name ')'
|
|
/// [C11] '_Alignof' '(' type-name ')'
|
|
/// [C++11] 'alignof' '(' type-id ')'
|
|
/// \endverbatim
|
|
ExprResult Parser::ParseUnaryExprOrTypeTraitExpression() {
|
|
assert(Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
|
|
tok::kw__Alignof, tok::kw_vec_step,
|
|
tok::kw___builtin_omp_required_simd_align) &&
|
|
"Not a sizeof/alignof/vec_step expression!");
|
|
Token OpTok = Tok;
|
|
ConsumeToken();
|
|
|
|
// [C++11] 'sizeof' '...' '(' identifier ')'
|
|
if (Tok.is(tok::ellipsis) && OpTok.is(tok::kw_sizeof)) {
|
|
SourceLocation EllipsisLoc = ConsumeToken();
|
|
SourceLocation LParenLoc, RParenLoc;
|
|
IdentifierInfo *Name = nullptr;
|
|
SourceLocation NameLoc;
|
|
if (Tok.is(tok::l_paren)) {
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
T.consumeOpen();
|
|
LParenLoc = T.getOpenLocation();
|
|
if (Tok.is(tok::identifier)) {
|
|
Name = Tok.getIdentifierInfo();
|
|
NameLoc = ConsumeToken();
|
|
T.consumeClose();
|
|
RParenLoc = T.getCloseLocation();
|
|
if (RParenLoc.isInvalid())
|
|
RParenLoc = PP.getLocForEndOfToken(NameLoc);
|
|
} else {
|
|
Diag(Tok, diag::err_expected_parameter_pack);
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
}
|
|
} else if (Tok.is(tok::identifier)) {
|
|
Name = Tok.getIdentifierInfo();
|
|
NameLoc = ConsumeToken();
|
|
LParenLoc = PP.getLocForEndOfToken(EllipsisLoc);
|
|
RParenLoc = PP.getLocForEndOfToken(NameLoc);
|
|
Diag(LParenLoc, diag::err_paren_sizeof_parameter_pack)
|
|
<< Name
|
|
<< FixItHint::CreateInsertion(LParenLoc, "(")
|
|
<< FixItHint::CreateInsertion(RParenLoc, ")");
|
|
} else {
|
|
Diag(Tok, diag::err_sizeof_parameter_pack);
|
|
}
|
|
|
|
if (!Name)
|
|
return ExprError();
|
|
|
|
EnterExpressionEvaluationContext Unevaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::Unevaluated,
|
|
Sema::ReuseLambdaContextDecl);
|
|
|
|
return Actions.ActOnSizeofParameterPackExpr(getCurScope(),
|
|
OpTok.getLocation(),
|
|
*Name, NameLoc,
|
|
RParenLoc);
|
|
}
|
|
|
|
if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
|
|
Diag(OpTok, diag::warn_cxx98_compat_alignof);
|
|
|
|
EnterExpressionEvaluationContext Unevaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::Unevaluated,
|
|
Sema::ReuseLambdaContextDecl);
|
|
|
|
bool isCastExpr;
|
|
ParsedType CastTy;
|
|
SourceRange CastRange;
|
|
ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok,
|
|
isCastExpr,
|
|
CastTy,
|
|
CastRange);
|
|
|
|
UnaryExprOrTypeTrait ExprKind = UETT_SizeOf;
|
|
if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
|
|
ExprKind = UETT_AlignOf;
|
|
else if (OpTok.is(tok::kw___alignof))
|
|
ExprKind = UETT_PreferredAlignOf;
|
|
else if (OpTok.is(tok::kw_vec_step))
|
|
ExprKind = UETT_VecStep;
|
|
else if (OpTok.is(tok::kw___builtin_omp_required_simd_align))
|
|
ExprKind = UETT_OpenMPRequiredSimdAlign;
|
|
|
|
if (isCastExpr)
|
|
return Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(),
|
|
ExprKind,
|
|
/*IsType=*/true,
|
|
CastTy.getAsOpaquePtr(),
|
|
CastRange);
|
|
|
|
if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
|
|
Diag(OpTok, diag::ext_alignof_expr) << OpTok.getIdentifierInfo();
|
|
|
|
// If we get here, the operand to the sizeof/alignof was an expression.
|
|
if (!Operand.isInvalid())
|
|
Operand = Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(),
|
|
ExprKind,
|
|
/*IsType=*/false,
|
|
Operand.get(),
|
|
CastRange);
|
|
return Operand;
|
|
}
|
|
|
|
/// ParseBuiltinPrimaryExpression
|
|
///
|
|
/// \verbatim
|
|
/// primary-expression: [C99 6.5.1]
|
|
/// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')'
|
|
/// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')'
|
|
/// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
|
|
/// assign-expr ')'
|
|
/// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
|
|
/// [GNU] '__builtin_FILE' '(' ')'
|
|
/// [GNU] '__builtin_FUNCTION' '(' ')'
|
|
/// [GNU] '__builtin_LINE' '(' ')'
|
|
/// [CLANG] '__builtin_COLUMN' '(' ')'
|
|
/// [OCL] '__builtin_astype' '(' assignment-expression ',' type-name ')'
|
|
///
|
|
/// [GNU] offsetof-member-designator:
|
|
/// [GNU] identifier
|
|
/// [GNU] offsetof-member-designator '.' identifier
|
|
/// [GNU] offsetof-member-designator '[' expression ']'
|
|
/// \endverbatim
|
|
ExprResult Parser::ParseBuiltinPrimaryExpression() {
|
|
ExprResult Res;
|
|
const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo();
|
|
|
|
tok::TokenKind T = Tok.getKind();
|
|
SourceLocation StartLoc = ConsumeToken(); // Eat the builtin identifier.
|
|
|
|
// All of these start with an open paren.
|
|
if (Tok.isNot(tok::l_paren))
|
|
return ExprError(Diag(Tok, diag::err_expected_after) << BuiltinII
|
|
<< tok::l_paren);
|
|
|
|
BalancedDelimiterTracker PT(*this, tok::l_paren);
|
|
PT.consumeOpen();
|
|
|
|
// TODO: Build AST.
|
|
|
|
switch (T) {
|
|
default: llvm_unreachable("Not a builtin primary expression!");
|
|
case tok::kw___builtin_va_arg: {
|
|
ExprResult Expr(ParseAssignmentExpression());
|
|
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
Expr = ExprError();
|
|
}
|
|
|
|
TypeResult Ty = ParseTypeName();
|
|
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok, diag::err_expected) << tok::r_paren;
|
|
Expr = ExprError();
|
|
}
|
|
|
|
if (Expr.isInvalid() || Ty.isInvalid())
|
|
Res = ExprError();
|
|
else
|
|
Res = Actions.ActOnVAArg(StartLoc, Expr.get(), Ty.get(), ConsumeParen());
|
|
break;
|
|
}
|
|
case tok::kw___builtin_offsetof: {
|
|
SourceLocation TypeLoc = Tok.getLocation();
|
|
TypeResult Ty = ParseTypeName();
|
|
if (Ty.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
// We must have at least one identifier here.
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected) << tok::identifier;
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
// Keep track of the various subcomponents we see.
|
|
SmallVector<Sema::OffsetOfComponent, 4> Comps;
|
|
|
|
Comps.push_back(Sema::OffsetOfComponent());
|
|
Comps.back().isBrackets = false;
|
|
Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
|
|
Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken();
|
|
|
|
// FIXME: This loop leaks the index expressions on error.
|
|
while (1) {
|
|
if (Tok.is(tok::period)) {
|
|
// offsetof-member-designator: offsetof-member-designator '.' identifier
|
|
Comps.push_back(Sema::OffsetOfComponent());
|
|
Comps.back().isBrackets = false;
|
|
Comps.back().LocStart = ConsumeToken();
|
|
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected) << tok::identifier;
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
|
|
Comps.back().LocEnd = ConsumeToken();
|
|
|
|
} else if (Tok.is(tok::l_square)) {
|
|
if (CheckProhibitedCXX11Attribute())
|
|
return ExprError();
|
|
|
|
// offsetof-member-designator: offsetof-member-design '[' expression ']'
|
|
Comps.push_back(Sema::OffsetOfComponent());
|
|
Comps.back().isBrackets = true;
|
|
BalancedDelimiterTracker ST(*this, tok::l_square);
|
|
ST.consumeOpen();
|
|
Comps.back().LocStart = ST.getOpenLocation();
|
|
Res = ParseExpression();
|
|
if (Res.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return Res;
|
|
}
|
|
Comps.back().U.E = Res.get();
|
|
|
|
ST.consumeClose();
|
|
Comps.back().LocEnd = ST.getCloseLocation();
|
|
} else {
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
PT.consumeClose();
|
|
Res = ExprError();
|
|
} else if (Ty.isInvalid()) {
|
|
Res = ExprError();
|
|
} else {
|
|
PT.consumeClose();
|
|
Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc,
|
|
Ty.get(), Comps,
|
|
PT.getCloseLocation());
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case tok::kw___builtin_choose_expr: {
|
|
ExprResult Cond(ParseAssignmentExpression());
|
|
if (Cond.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return Cond;
|
|
}
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
ExprResult Expr1(ParseAssignmentExpression());
|
|
if (Expr1.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return Expr1;
|
|
}
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
ExprResult Expr2(ParseAssignmentExpression());
|
|
if (Expr2.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return Expr2;
|
|
}
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok, diag::err_expected) << tok::r_paren;
|
|
return ExprError();
|
|
}
|
|
Res = Actions.ActOnChooseExpr(StartLoc, Cond.get(), Expr1.get(),
|
|
Expr2.get(), ConsumeParen());
|
|
break;
|
|
}
|
|
case tok::kw___builtin_astype: {
|
|
// The first argument is an expression to be converted, followed by a comma.
|
|
ExprResult Expr(ParseAssignmentExpression());
|
|
if (Expr.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
// Second argument is the type to bitcast to.
|
|
TypeResult DestTy = ParseTypeName();
|
|
if (DestTy.isInvalid())
|
|
return ExprError();
|
|
|
|
// Attempt to consume the r-paren.
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok, diag::err_expected) << tok::r_paren;
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
Res = Actions.ActOnAsTypeExpr(Expr.get(), DestTy.get(), StartLoc,
|
|
ConsumeParen());
|
|
break;
|
|
}
|
|
case tok::kw___builtin_convertvector: {
|
|
// The first argument is an expression to be converted, followed by a comma.
|
|
ExprResult Expr(ParseAssignmentExpression());
|
|
if (Expr.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
// Second argument is the type to bitcast to.
|
|
TypeResult DestTy = ParseTypeName();
|
|
if (DestTy.isInvalid())
|
|
return ExprError();
|
|
|
|
// Attempt to consume the r-paren.
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok, diag::err_expected) << tok::r_paren;
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
Res = Actions.ActOnConvertVectorExpr(Expr.get(), DestTy.get(), StartLoc,
|
|
ConsumeParen());
|
|
break;
|
|
}
|
|
case tok::kw___builtin_COLUMN:
|
|
case tok::kw___builtin_FILE:
|
|
case tok::kw___builtin_FUNCTION:
|
|
case tok::kw___builtin_LINE: {
|
|
// Attempt to consume the r-paren.
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
Diag(Tok, diag::err_expected) << tok::r_paren;
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
SourceLocExpr::IdentKind Kind = [&] {
|
|
switch (T) {
|
|
case tok::kw___builtin_FILE:
|
|
return SourceLocExpr::File;
|
|
case tok::kw___builtin_FUNCTION:
|
|
return SourceLocExpr::Function;
|
|
case tok::kw___builtin_LINE:
|
|
return SourceLocExpr::Line;
|
|
case tok::kw___builtin_COLUMN:
|
|
return SourceLocExpr::Column;
|
|
default:
|
|
llvm_unreachable("invalid keyword");
|
|
}
|
|
}();
|
|
Res = Actions.ActOnSourceLocExpr(Kind, StartLoc, ConsumeParen());
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Res.isInvalid())
|
|
return ExprError();
|
|
|
|
// These can be followed by postfix-expr pieces because they are
|
|
// primary-expressions.
|
|
return ParsePostfixExpressionSuffix(Res.get());
|
|
}
|
|
|
|
bool Parser::tryParseOpenMPArrayShapingCastPart() {
|
|
assert(Tok.is(tok::l_square) && "Expected open bracket");
|
|
bool ErrorFound = true;
|
|
TentativeParsingAction TPA(*this);
|
|
do {
|
|
if (Tok.isNot(tok::l_square))
|
|
break;
|
|
// Consume '['
|
|
ConsumeBracket();
|
|
// Skip inner expression.
|
|
while (!SkipUntil(tok::r_square, tok::annot_pragma_openmp_end,
|
|
StopAtSemi | StopBeforeMatch))
|
|
;
|
|
if (Tok.isNot(tok::r_square))
|
|
break;
|
|
// Consume ']'
|
|
ConsumeBracket();
|
|
// Found ')' - done.
|
|
if (Tok.is(tok::r_paren)) {
|
|
ErrorFound = false;
|
|
break;
|
|
}
|
|
} while (Tok.isNot(tok::annot_pragma_openmp_end));
|
|
TPA.Revert();
|
|
return !ErrorFound;
|
|
}
|
|
|
|
/// ParseParenExpression - This parses the unit that starts with a '(' token,
|
|
/// based on what is allowed by ExprType. The actual thing parsed is returned
|
|
/// in ExprType. If stopIfCastExpr is true, it will only return the parsed type,
|
|
/// not the parsed cast-expression.
|
|
///
|
|
/// \verbatim
|
|
/// primary-expression: [C99 6.5.1]
|
|
/// '(' expression ')'
|
|
/// [GNU] '(' compound-statement ')' (if !ParenExprOnly)
|
|
/// postfix-expression: [C99 6.5.2]
|
|
/// '(' type-name ')' '{' initializer-list '}'
|
|
/// '(' type-name ')' '{' initializer-list ',' '}'
|
|
/// cast-expression: [C99 6.5.4]
|
|
/// '(' type-name ')' cast-expression
|
|
/// [ARC] bridged-cast-expression
|
|
/// [ARC] bridged-cast-expression:
|
|
/// (__bridge type-name) cast-expression
|
|
/// (__bridge_transfer type-name) cast-expression
|
|
/// (__bridge_retained type-name) cast-expression
|
|
/// fold-expression: [C++1z]
|
|
/// '(' cast-expression fold-operator '...' ')'
|
|
/// '(' '...' fold-operator cast-expression ')'
|
|
/// '(' cast-expression fold-operator '...'
|
|
/// fold-operator cast-expression ')'
|
|
/// [OPENMP] Array shaping operation
|
|
/// '(' '[' expression ']' { '[' expression ']' } cast-expression
|
|
/// \endverbatim
|
|
ExprResult
|
|
Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr,
|
|
bool isTypeCast, ParsedType &CastTy,
|
|
SourceLocation &RParenLoc) {
|
|
assert(Tok.is(tok::l_paren) && "Not a paren expr!");
|
|
ColonProtectionRAIIObject ColonProtection(*this, false);
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.consumeOpen())
|
|
return ExprError();
|
|
SourceLocation OpenLoc = T.getOpenLocation();
|
|
|
|
PreferredType.enterParenExpr(Tok.getLocation(), OpenLoc);
|
|
|
|
ExprResult Result(true);
|
|
bool isAmbiguousTypeId;
|
|
CastTy = nullptr;
|
|
|
|
if (Tok.is(tok::code_completion)) {
|
|
Actions.CodeCompleteExpression(
|
|
getCurScope(), PreferredType.get(Tok.getLocation()),
|
|
/*IsParenthesized=*/ExprType >= CompoundLiteral);
|
|
cutOffParsing();
|
|
return ExprError();
|
|
}
|
|
|
|
// Diagnose use of bridge casts in non-arc mode.
|
|
bool BridgeCast = (getLangOpts().ObjC &&
|
|
Tok.isOneOf(tok::kw___bridge,
|
|
tok::kw___bridge_transfer,
|
|
tok::kw___bridge_retained,
|
|
tok::kw___bridge_retain));
|
|
if (BridgeCast && !getLangOpts().ObjCAutoRefCount) {
|
|
if (!TryConsumeToken(tok::kw___bridge)) {
|
|
StringRef BridgeCastName = Tok.getName();
|
|
SourceLocation BridgeKeywordLoc = ConsumeToken();
|
|
if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
|
|
Diag(BridgeKeywordLoc, diag::warn_arc_bridge_cast_nonarc)
|
|
<< BridgeCastName
|
|
<< FixItHint::CreateReplacement(BridgeKeywordLoc, "");
|
|
}
|
|
BridgeCast = false;
|
|
}
|
|
|
|
// None of these cases should fall through with an invalid Result
|
|
// unless they've already reported an error.
|
|
if (ExprType >= CompoundStmt && Tok.is(tok::l_brace)) {
|
|
Diag(Tok, diag::ext_gnu_statement_expr);
|
|
|
|
if (!getCurScope()->getFnParent() && !getCurScope()->getBlockParent()) {
|
|
Result = ExprError(Diag(OpenLoc, diag::err_stmtexpr_file_scope));
|
|
} else {
|
|
// Find the nearest non-record decl context. Variables declared in a
|
|
// statement expression behave as if they were declared in the enclosing
|
|
// function, block, or other code construct.
|
|
DeclContext *CodeDC = Actions.CurContext;
|
|
while (CodeDC->isRecord() || isa<EnumDecl>(CodeDC)) {
|
|
CodeDC = CodeDC->getParent();
|
|
assert(CodeDC && !CodeDC->isFileContext() &&
|
|
"statement expr not in code context");
|
|
}
|
|
Sema::ContextRAII SavedContext(Actions, CodeDC, /*NewThisContext=*/false);
|
|
|
|
Actions.ActOnStartStmtExpr();
|
|
|
|
StmtResult Stmt(ParseCompoundStatement(true));
|
|
ExprType = CompoundStmt;
|
|
|
|
// If the substmt parsed correctly, build the AST node.
|
|
if (!Stmt.isInvalid()) {
|
|
Result = Actions.ActOnStmtExpr(getCurScope(), OpenLoc, Stmt.get(),
|
|
Tok.getLocation());
|
|
} else {
|
|
Actions.ActOnStmtExprError();
|
|
}
|
|
}
|
|
} else if (ExprType >= CompoundLiteral && BridgeCast) {
|
|
tok::TokenKind tokenKind = Tok.getKind();
|
|
SourceLocation BridgeKeywordLoc = ConsumeToken();
|
|
|
|
// Parse an Objective-C ARC ownership cast expression.
|
|
ObjCBridgeCastKind Kind;
|
|
if (tokenKind == tok::kw___bridge)
|
|
Kind = OBC_Bridge;
|
|
else if (tokenKind == tok::kw___bridge_transfer)
|
|
Kind = OBC_BridgeTransfer;
|
|
else if (tokenKind == tok::kw___bridge_retained)
|
|
Kind = OBC_BridgeRetained;
|
|
else {
|
|
// As a hopefully temporary workaround, allow __bridge_retain as
|
|
// a synonym for __bridge_retained, but only in system headers.
|
|
assert(tokenKind == tok::kw___bridge_retain);
|
|
Kind = OBC_BridgeRetained;
|
|
if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
|
|
Diag(BridgeKeywordLoc, diag::err_arc_bridge_retain)
|
|
<< FixItHint::CreateReplacement(BridgeKeywordLoc,
|
|
"__bridge_retained");
|
|
}
|
|
|
|
TypeResult Ty = ParseTypeName();
|
|
T.consumeClose();
|
|
ColonProtection.restore();
|
|
RParenLoc = T.getCloseLocation();
|
|
|
|
PreferredType.enterTypeCast(Tok.getLocation(), Ty.get().get());
|
|
ExprResult SubExpr = ParseCastExpression(AnyCastExpr);
|
|
|
|
if (Ty.isInvalid() || SubExpr.isInvalid())
|
|
return ExprError();
|
|
|
|
return Actions.ActOnObjCBridgedCast(getCurScope(), OpenLoc, Kind,
|
|
BridgeKeywordLoc, Ty.get(),
|
|
RParenLoc, SubExpr.get());
|
|
} else if (ExprType >= CompoundLiteral &&
|
|
isTypeIdInParens(isAmbiguousTypeId)) {
|
|
|
|
// Otherwise, this is a compound literal expression or cast expression.
|
|
|
|
// In C++, if the type-id is ambiguous we disambiguate based on context.
|
|
// If stopIfCastExpr is true the context is a typeof/sizeof/alignof
|
|
// in which case we should treat it as type-id.
|
|
// if stopIfCastExpr is false, we need to determine the context past the
|
|
// parens, so we defer to ParseCXXAmbiguousParenExpression for that.
|
|
if (isAmbiguousTypeId && !stopIfCastExpr) {
|
|
ExprResult res = ParseCXXAmbiguousParenExpression(ExprType, CastTy, T,
|
|
ColonProtection);
|
|
RParenLoc = T.getCloseLocation();
|
|
return res;
|
|
}
|
|
|
|
// Parse the type declarator.
|
|
DeclSpec DS(AttrFactory);
|
|
ParseSpecifierQualifierList(DS);
|
|
Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext);
|
|
ParseDeclarator(DeclaratorInfo);
|
|
|
|
// If our type is followed by an identifier and either ':' or ']', then
|
|
// this is probably an Objective-C message send where the leading '[' is
|
|
// missing. Recover as if that were the case.
|
|
if (!DeclaratorInfo.isInvalidType() && Tok.is(tok::identifier) &&
|
|
!InMessageExpression && getLangOpts().ObjC &&
|
|
(NextToken().is(tok::colon) || NextToken().is(tok::r_square))) {
|
|
TypeResult Ty;
|
|
{
|
|
InMessageExpressionRAIIObject InMessage(*this, false);
|
|
Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
|
|
}
|
|
Result = ParseObjCMessageExpressionBody(SourceLocation(),
|
|
SourceLocation(),
|
|
Ty.get(), nullptr);
|
|
} else {
|
|
// Match the ')'.
|
|
T.consumeClose();
|
|
ColonProtection.restore();
|
|
RParenLoc = T.getCloseLocation();
|
|
if (Tok.is(tok::l_brace)) {
|
|
ExprType = CompoundLiteral;
|
|
TypeResult Ty;
|
|
{
|
|
InMessageExpressionRAIIObject InMessage(*this, false);
|
|
Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
|
|
}
|
|
return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc);
|
|
}
|
|
|
|
if (Tok.is(tok::l_paren)) {
|
|
// This could be OpenCL vector Literals
|
|
if (getLangOpts().OpenCL)
|
|
{
|
|
TypeResult Ty;
|
|
{
|
|
InMessageExpressionRAIIObject InMessage(*this, false);
|
|
Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
|
|
}
|
|
if(Ty.isInvalid())
|
|
{
|
|
return ExprError();
|
|
}
|
|
QualType QT = Ty.get().get().getCanonicalType();
|
|
if (QT->isVectorType())
|
|
{
|
|
// We parsed '(' vector-type-name ')' followed by '('
|
|
|
|
// Parse the cast-expression that follows it next.
|
|
// isVectorLiteral = true will make sure we don't parse any
|
|
// Postfix expression yet
|
|
Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
|
|
/*isAddressOfOperand=*/false,
|
|
/*isTypeCast=*/IsTypeCast,
|
|
/*isVectorLiteral=*/true);
|
|
|
|
if (!Result.isInvalid()) {
|
|
Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
|
|
DeclaratorInfo, CastTy,
|
|
RParenLoc, Result.get());
|
|
}
|
|
|
|
// After we performed the cast we can check for postfix-expr pieces.
|
|
if (!Result.isInvalid()) {
|
|
Result = ParsePostfixExpressionSuffix(Result);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ExprType == CastExpr) {
|
|
// We parsed '(' type-name ')' and the thing after it wasn't a '{'.
|
|
|
|
if (DeclaratorInfo.isInvalidType())
|
|
return ExprError();
|
|
|
|
// Note that this doesn't parse the subsequent cast-expression, it just
|
|
// returns the parsed type to the callee.
|
|
if (stopIfCastExpr) {
|
|
TypeResult Ty;
|
|
{
|
|
InMessageExpressionRAIIObject InMessage(*this, false);
|
|
Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
|
|
}
|
|
CastTy = Ty.get();
|
|
return ExprResult();
|
|
}
|
|
|
|
// Reject the cast of super idiom in ObjC.
|
|
if (Tok.is(tok::identifier) && getLangOpts().ObjC &&
|
|
Tok.getIdentifierInfo() == Ident_super &&
|
|
getCurScope()->isInObjcMethodScope() &&
|
|
GetLookAheadToken(1).isNot(tok::period)) {
|
|
Diag(Tok.getLocation(), diag::err_illegal_super_cast)
|
|
<< SourceRange(OpenLoc, RParenLoc);
|
|
return ExprError();
|
|
}
|
|
|
|
PreferredType.enterTypeCast(Tok.getLocation(), CastTy.get());
|
|
// Parse the cast-expression that follows it next.
|
|
// TODO: For cast expression with CastTy.
|
|
Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
|
|
/*isAddressOfOperand=*/false,
|
|
/*isTypeCast=*/IsTypeCast);
|
|
if (!Result.isInvalid()) {
|
|
Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
|
|
DeclaratorInfo, CastTy,
|
|
RParenLoc, Result.get());
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
Diag(Tok, diag::err_expected_lbrace_in_compound_literal);
|
|
return ExprError();
|
|
}
|
|
} else if (ExprType >= FoldExpr && Tok.is(tok::ellipsis) &&
|
|
isFoldOperator(NextToken().getKind())) {
|
|
ExprType = FoldExpr;
|
|
return ParseFoldExpression(ExprResult(), T);
|
|
} else if (isTypeCast) {
|
|
// Parse the expression-list.
|
|
InMessageExpressionRAIIObject InMessage(*this, false);
|
|
|
|
ExprVector ArgExprs;
|
|
CommaLocsTy CommaLocs;
|
|
|
|
if (!ParseSimpleExpressionList(ArgExprs, CommaLocs)) {
|
|
// FIXME: If we ever support comma expressions as operands to
|
|
// fold-expressions, we'll need to allow multiple ArgExprs here.
|
|
if (ExprType >= FoldExpr && ArgExprs.size() == 1 &&
|
|
isFoldOperator(Tok.getKind()) && NextToken().is(tok::ellipsis)) {
|
|
ExprType = FoldExpr;
|
|
return ParseFoldExpression(ArgExprs[0], T);
|
|
}
|
|
|
|
ExprType = SimpleExpr;
|
|
Result = Actions.ActOnParenListExpr(OpenLoc, Tok.getLocation(),
|
|
ArgExprs);
|
|
}
|
|
} else if (getLangOpts().OpenMP >= 50 && OpenMPDirectiveParsing &&
|
|
ExprType == CastExpr && Tok.is(tok::l_square) &&
|
|
tryParseOpenMPArrayShapingCastPart()) {
|
|
bool ErrorFound = false;
|
|
SmallVector<Expr *, 4> OMPDimensions;
|
|
SmallVector<SourceRange, 4> OMPBracketsRanges;
|
|
do {
|
|
BalancedDelimiterTracker TS(*this, tok::l_square);
|
|
TS.consumeOpen();
|
|
ExprResult NumElements =
|
|
Actions.CorrectDelayedTyposInExpr(ParseExpression());
|
|
if (!NumElements.isUsable()) {
|
|
ErrorFound = true;
|
|
while (!SkipUntil(tok::r_square, tok::r_paren,
|
|
StopAtSemi | StopBeforeMatch))
|
|
;
|
|
}
|
|
TS.consumeClose();
|
|
OMPDimensions.push_back(NumElements.get());
|
|
OMPBracketsRanges.push_back(TS.getRange());
|
|
} while (Tok.isNot(tok::r_paren));
|
|
// Match the ')'.
|
|
T.consumeClose();
|
|
RParenLoc = T.getCloseLocation();
|
|
Result = Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
|
|
if (ErrorFound) {
|
|
Result = ExprError();
|
|
} else if (!Result.isInvalid()) {
|
|
Result = Actions.ActOnOMPArrayShapingExpr(
|
|
Result.get(), OpenLoc, RParenLoc, OMPDimensions, OMPBracketsRanges);
|
|
}
|
|
return Result;
|
|
} else {
|
|
InMessageExpressionRAIIObject InMessage(*this, false);
|
|
|
|
Result = ParseExpression(MaybeTypeCast);
|
|
if (!getLangOpts().CPlusPlus && MaybeTypeCast && Result.isUsable()) {
|
|
// Correct typos in non-C++ code earlier so that implicit-cast-like
|
|
// expressions are parsed correctly.
|
|
Result = Actions.CorrectDelayedTyposInExpr(Result);
|
|
}
|
|
|
|
if (ExprType >= FoldExpr && isFoldOperator(Tok.getKind()) &&
|
|
NextToken().is(tok::ellipsis)) {
|
|
ExprType = FoldExpr;
|
|
return ParseFoldExpression(Result, T);
|
|
}
|
|
ExprType = SimpleExpr;
|
|
|
|
// Don't build a paren expression unless we actually match a ')'.
|
|
if (!Result.isInvalid() && Tok.is(tok::r_paren))
|
|
Result =
|
|
Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.get());
|
|
}
|
|
|
|
// Match the ')'.
|
|
if (Result.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
T.consumeClose();
|
|
RParenLoc = T.getCloseLocation();
|
|
return Result;
|
|
}
|
|
|
|
/// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name
|
|
/// and we are at the left brace.
|
|
///
|
|
/// \verbatim
|
|
/// postfix-expression: [C99 6.5.2]
|
|
/// '(' type-name ')' '{' initializer-list '}'
|
|
/// '(' type-name ')' '{' initializer-list ',' '}'
|
|
/// \endverbatim
|
|
ExprResult
|
|
Parser::ParseCompoundLiteralExpression(ParsedType Ty,
|
|
SourceLocation LParenLoc,
|
|
SourceLocation RParenLoc) {
|
|
assert(Tok.is(tok::l_brace) && "Not a compound literal!");
|
|
if (!getLangOpts().C99) // Compound literals don't exist in C90.
|
|
Diag(LParenLoc, diag::ext_c99_compound_literal);
|
|
ExprResult Result = ParseInitializer();
|
|
if (!Result.isInvalid() && Ty)
|
|
return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.get());
|
|
return Result;
|
|
}
|
|
|
|
/// ParseStringLiteralExpression - This handles the various token types that
|
|
/// form string literals, and also handles string concatenation [C99 5.1.1.2,
|
|
/// translation phase #6].
|
|
///
|
|
/// \verbatim
|
|
/// primary-expression: [C99 6.5.1]
|
|
/// string-literal
|
|
/// \verbatim
|
|
ExprResult Parser::ParseStringLiteralExpression(bool AllowUserDefinedLiteral) {
|
|
assert(isTokenStringLiteral() && "Not a string literal!");
|
|
|
|
// String concat. Note that keywords like __func__ and __FUNCTION__ are not
|
|
// considered to be strings for concatenation purposes.
|
|
SmallVector<Token, 4> StringToks;
|
|
|
|
do {
|
|
StringToks.push_back(Tok);
|
|
ConsumeStringToken();
|
|
} while (isTokenStringLiteral());
|
|
|
|
// Pass the set of string tokens, ready for concatenation, to the actions.
|
|
return Actions.ActOnStringLiteral(StringToks,
|
|
AllowUserDefinedLiteral ? getCurScope()
|
|
: nullptr);
|
|
}
|
|
|
|
/// ParseGenericSelectionExpression - Parse a C11 generic-selection
|
|
/// [C11 6.5.1.1].
|
|
///
|
|
/// \verbatim
|
|
/// generic-selection:
|
|
/// _Generic ( assignment-expression , generic-assoc-list )
|
|
/// generic-assoc-list:
|
|
/// generic-association
|
|
/// generic-assoc-list , generic-association
|
|
/// generic-association:
|
|
/// type-name : assignment-expression
|
|
/// default : assignment-expression
|
|
/// \endverbatim
|
|
ExprResult Parser::ParseGenericSelectionExpression() {
|
|
assert(Tok.is(tok::kw__Generic) && "_Generic keyword expected");
|
|
if (!getLangOpts().C11)
|
|
Diag(Tok, diag::ext_c11_feature) << Tok.getName();
|
|
|
|
SourceLocation KeyLoc = ConsumeToken();
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.expectAndConsume())
|
|
return ExprError();
|
|
|
|
ExprResult ControllingExpr;
|
|
{
|
|
// C11 6.5.1.1p3 "The controlling expression of a generic selection is
|
|
// not evaluated."
|
|
EnterExpressionEvaluationContext Unevaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::Unevaluated);
|
|
ControllingExpr =
|
|
Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
|
|
if (ControllingExpr.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
SourceLocation DefaultLoc;
|
|
TypeVector Types;
|
|
ExprVector Exprs;
|
|
do {
|
|
ParsedType Ty;
|
|
if (Tok.is(tok::kw_default)) {
|
|
// C11 6.5.1.1p2 "A generic selection shall have no more than one default
|
|
// generic association."
|
|
if (!DefaultLoc.isInvalid()) {
|
|
Diag(Tok, diag::err_duplicate_default_assoc);
|
|
Diag(DefaultLoc, diag::note_previous_default_assoc);
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
DefaultLoc = ConsumeToken();
|
|
Ty = nullptr;
|
|
} else {
|
|
ColonProtectionRAIIObject X(*this);
|
|
TypeResult TR = ParseTypeName();
|
|
if (TR.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
Ty = TR.get();
|
|
}
|
|
Types.push_back(Ty);
|
|
|
|
if (ExpectAndConsume(tok::colon)) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
// FIXME: These expressions should be parsed in a potentially potentially
|
|
// evaluated context.
|
|
ExprResult ER(
|
|
Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()));
|
|
if (ER.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
Exprs.push_back(ER.get());
|
|
} while (TryConsumeToken(tok::comma));
|
|
|
|
T.consumeClose();
|
|
if (T.getCloseLocation().isInvalid())
|
|
return ExprError();
|
|
|
|
return Actions.ActOnGenericSelectionExpr(KeyLoc, DefaultLoc,
|
|
T.getCloseLocation(),
|
|
ControllingExpr.get(),
|
|
Types, Exprs);
|
|
}
|
|
|
|
/// Parse A C++1z fold-expression after the opening paren and optional
|
|
/// left-hand-side expression.
|
|
///
|
|
/// \verbatim
|
|
/// fold-expression:
|
|
/// ( cast-expression fold-operator ... )
|
|
/// ( ... fold-operator cast-expression )
|
|
/// ( cast-expression fold-operator ... fold-operator cast-expression )
|
|
ExprResult Parser::ParseFoldExpression(ExprResult LHS,
|
|
BalancedDelimiterTracker &T) {
|
|
if (LHS.isInvalid()) {
|
|
T.skipToEnd();
|
|
return true;
|
|
}
|
|
|
|
tok::TokenKind Kind = tok::unknown;
|
|
SourceLocation FirstOpLoc;
|
|
if (LHS.isUsable()) {
|
|
Kind = Tok.getKind();
|
|
assert(isFoldOperator(Kind) && "missing fold-operator");
|
|
FirstOpLoc = ConsumeToken();
|
|
}
|
|
|
|
assert(Tok.is(tok::ellipsis) && "not a fold-expression");
|
|
SourceLocation EllipsisLoc = ConsumeToken();
|
|
|
|
ExprResult RHS;
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
if (!isFoldOperator(Tok.getKind()))
|
|
return Diag(Tok.getLocation(), diag::err_expected_fold_operator);
|
|
|
|
if (Kind != tok::unknown && Tok.getKind() != Kind)
|
|
Diag(Tok.getLocation(), diag::err_fold_operator_mismatch)
|
|
<< SourceRange(FirstOpLoc);
|
|
Kind = Tok.getKind();
|
|
ConsumeToken();
|
|
|
|
RHS = ParseExpression();
|
|
if (RHS.isInvalid()) {
|
|
T.skipToEnd();
|
|
return true;
|
|
}
|
|
}
|
|
|
|
Diag(EllipsisLoc, getLangOpts().CPlusPlus17
|
|
? diag::warn_cxx14_compat_fold_expression
|
|
: diag::ext_fold_expression);
|
|
|
|
T.consumeClose();
|
|
return Actions.ActOnCXXFoldExpr(T.getOpenLocation(), LHS.get(), Kind,
|
|
EllipsisLoc, RHS.get(), T.getCloseLocation());
|
|
}
|
|
|
|
/// ParseExpressionList - Used for C/C++ (argument-)expression-list.
|
|
///
|
|
/// \verbatim
|
|
/// argument-expression-list:
|
|
/// assignment-expression
|
|
/// argument-expression-list , assignment-expression
|
|
///
|
|
/// [C++] expression-list:
|
|
/// [C++] assignment-expression
|
|
/// [C++] expression-list , assignment-expression
|
|
///
|
|
/// [C++0x] expression-list:
|
|
/// [C++0x] initializer-list
|
|
///
|
|
/// [C++0x] initializer-list
|
|
/// [C++0x] initializer-clause ...[opt]
|
|
/// [C++0x] initializer-list , initializer-clause ...[opt]
|
|
///
|
|
/// [C++0x] initializer-clause:
|
|
/// [C++0x] assignment-expression
|
|
/// [C++0x] braced-init-list
|
|
/// \endverbatim
|
|
bool Parser::ParseExpressionList(SmallVectorImpl<Expr *> &Exprs,
|
|
SmallVectorImpl<SourceLocation> &CommaLocs,
|
|
llvm::function_ref<void()> ExpressionStarts) {
|
|
bool SawError = false;
|
|
while (1) {
|
|
if (ExpressionStarts)
|
|
ExpressionStarts();
|
|
|
|
ExprResult Expr;
|
|
if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
|
|
Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
|
|
Expr = ParseBraceInitializer();
|
|
} else
|
|
Expr = ParseAssignmentExpression();
|
|
|
|
if (Tok.is(tok::ellipsis))
|
|
Expr = Actions.ActOnPackExpansion(Expr.get(), ConsumeToken());
|
|
else if (Tok.is(tok::code_completion)) {
|
|
// There's nothing to suggest in here as we parsed a full expression.
|
|
// Instead fail and propogate the error since caller might have something
|
|
// the suggest, e.g. signature help in function call. Note that this is
|
|
// performed before pushing the \p Expr, so that signature help can report
|
|
// current argument correctly.
|
|
SawError = true;
|
|
cutOffParsing();
|
|
break;
|
|
}
|
|
if (Expr.isInvalid()) {
|
|
SkipUntil(tok::comma, tok::r_paren, StopBeforeMatch);
|
|
SawError = true;
|
|
} else {
|
|
Exprs.push_back(Expr.get());
|
|
}
|
|
|
|
if (Tok.isNot(tok::comma))
|
|
break;
|
|
// Move to the next argument, remember where the comma was.
|
|
Token Comma = Tok;
|
|
CommaLocs.push_back(ConsumeToken());
|
|
|
|
checkPotentialAngleBracketDelimiter(Comma);
|
|
}
|
|
if (SawError) {
|
|
// Ensure typos get diagnosed when errors were encountered while parsing the
|
|
// expression list.
|
|
for (auto &E : Exprs) {
|
|
ExprResult Expr = Actions.CorrectDelayedTyposInExpr(E);
|
|
if (Expr.isUsable()) E = Expr.get();
|
|
}
|
|
}
|
|
return SawError;
|
|
}
|
|
|
|
/// ParseSimpleExpressionList - A simple comma-separated list of expressions,
|
|
/// used for misc language extensions.
|
|
///
|
|
/// \verbatim
|
|
/// simple-expression-list:
|
|
/// assignment-expression
|
|
/// simple-expression-list , assignment-expression
|
|
/// \endverbatim
|
|
bool
|
|
Parser::ParseSimpleExpressionList(SmallVectorImpl<Expr*> &Exprs,
|
|
SmallVectorImpl<SourceLocation> &CommaLocs) {
|
|
while (1) {
|
|
ExprResult Expr = ParseAssignmentExpression();
|
|
if (Expr.isInvalid())
|
|
return true;
|
|
|
|
Exprs.push_back(Expr.get());
|
|
|
|
if (Tok.isNot(tok::comma))
|
|
return false;
|
|
|
|
// Move to the next argument, remember where the comma was.
|
|
Token Comma = Tok;
|
|
CommaLocs.push_back(ConsumeToken());
|
|
|
|
checkPotentialAngleBracketDelimiter(Comma);
|
|
}
|
|
}
|
|
|
|
/// ParseBlockId - Parse a block-id, which roughly looks like int (int x).
|
|
///
|
|
/// \verbatim
|
|
/// [clang] block-id:
|
|
/// [clang] specifier-qualifier-list block-declarator
|
|
/// \endverbatim
|
|
void Parser::ParseBlockId(SourceLocation CaretLoc) {
|
|
if (Tok.is(tok::code_completion)) {
|
|
Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Type);
|
|
return cutOffParsing();
|
|
}
|
|
|
|
// Parse the specifier-qualifier-list piece.
|
|
DeclSpec DS(AttrFactory);
|
|
ParseSpecifierQualifierList(DS);
|
|
|
|
// Parse the block-declarator.
|
|
Declarator DeclaratorInfo(DS, DeclaratorContext::BlockLiteralContext);
|
|
DeclaratorInfo.setFunctionDefinitionKind(FDK_Definition);
|
|
ParseDeclarator(DeclaratorInfo);
|
|
|
|
MaybeParseGNUAttributes(DeclaratorInfo);
|
|
|
|
// Inform sema that we are starting a block.
|
|
Actions.ActOnBlockArguments(CaretLoc, DeclaratorInfo, getCurScope());
|
|
}
|
|
|
|
/// ParseBlockLiteralExpression - Parse a block literal, which roughly looks
|
|
/// like ^(int x){ return x+1; }
|
|
///
|
|
/// \verbatim
|
|
/// block-literal:
|
|
/// [clang] '^' block-args[opt] compound-statement
|
|
/// [clang] '^' block-id compound-statement
|
|
/// [clang] block-args:
|
|
/// [clang] '(' parameter-list ')'
|
|
/// \endverbatim
|
|
ExprResult Parser::ParseBlockLiteralExpression() {
|
|
assert(Tok.is(tok::caret) && "block literal starts with ^");
|
|
SourceLocation CaretLoc = ConsumeToken();
|
|
|
|
PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc,
|
|
"block literal parsing");
|
|
|
|
// Enter a scope to hold everything within the block. This includes the
|
|
// argument decls, decls within the compound expression, etc. This also
|
|
// allows determining whether a variable reference inside the block is
|
|
// within or outside of the block.
|
|
ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope |
|
|
Scope::CompoundStmtScope | Scope::DeclScope);
|
|
|
|
// Inform sema that we are starting a block.
|
|
Actions.ActOnBlockStart(CaretLoc, getCurScope());
|
|
|
|
// Parse the return type if present.
|
|
DeclSpec DS(AttrFactory);
|
|
Declarator ParamInfo(DS, DeclaratorContext::BlockLiteralContext);
|
|
ParamInfo.setFunctionDefinitionKind(FDK_Definition);
|
|
// FIXME: Since the return type isn't actually parsed, it can't be used to
|
|
// fill ParamInfo with an initial valid range, so do it manually.
|
|
ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation()));
|
|
|
|
// If this block has arguments, parse them. There is no ambiguity here with
|
|
// the expression case, because the expression case requires a parameter list.
|
|
if (Tok.is(tok::l_paren)) {
|
|
ParseParenDeclarator(ParamInfo);
|
|
// Parse the pieces after the identifier as if we had "int(...)".
|
|
// SetIdentifier sets the source range end, but in this case we're past
|
|
// that location.
|
|
SourceLocation Tmp = ParamInfo.getSourceRange().getEnd();
|
|
ParamInfo.SetIdentifier(nullptr, CaretLoc);
|
|
ParamInfo.SetRangeEnd(Tmp);
|
|
if (ParamInfo.isInvalidType()) {
|
|
// If there was an error parsing the arguments, they may have
|
|
// tried to use ^(x+y) which requires an argument list. Just
|
|
// skip the whole block literal.
|
|
Actions.ActOnBlockError(CaretLoc, getCurScope());
|
|
return ExprError();
|
|
}
|
|
|
|
MaybeParseGNUAttributes(ParamInfo);
|
|
|
|
// Inform sema that we are starting a block.
|
|
Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
|
|
} else if (!Tok.is(tok::l_brace)) {
|
|
ParseBlockId(CaretLoc);
|
|
} else {
|
|
// Otherwise, pretend we saw (void).
|
|
SourceLocation NoLoc;
|
|
ParamInfo.AddTypeInfo(
|
|
DeclaratorChunk::getFunction(/*HasProto=*/true,
|
|
/*IsAmbiguous=*/false,
|
|
/*RParenLoc=*/NoLoc,
|
|
/*ArgInfo=*/nullptr,
|
|
/*NumParams=*/0,
|
|
/*EllipsisLoc=*/NoLoc,
|
|
/*RParenLoc=*/NoLoc,
|
|
/*RefQualifierIsLvalueRef=*/true,
|
|
/*RefQualifierLoc=*/NoLoc,
|
|
/*MutableLoc=*/NoLoc, EST_None,
|
|
/*ESpecRange=*/SourceRange(),
|
|
/*Exceptions=*/nullptr,
|
|
/*ExceptionRanges=*/nullptr,
|
|
/*NumExceptions=*/0,
|
|
/*NoexceptExpr=*/nullptr,
|
|
/*ExceptionSpecTokens=*/nullptr,
|
|
/*DeclsInPrototype=*/None, CaretLoc,
|
|
CaretLoc, ParamInfo),
|
|
CaretLoc);
|
|
|
|
MaybeParseGNUAttributes(ParamInfo);
|
|
|
|
// Inform sema that we are starting a block.
|
|
Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
|
|
}
|
|
|
|
|
|
ExprResult Result(true);
|
|
if (!Tok.is(tok::l_brace)) {
|
|
// Saw something like: ^expr
|
|
Diag(Tok, diag::err_expected_expression);
|
|
Actions.ActOnBlockError(CaretLoc, getCurScope());
|
|
return ExprError();
|
|
}
|
|
|
|
StmtResult Stmt(ParseCompoundStatementBody());
|
|
BlockScope.Exit();
|
|
if (!Stmt.isInvalid())
|
|
Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.get(), getCurScope());
|
|
else
|
|
Actions.ActOnBlockError(CaretLoc, getCurScope());
|
|
return Result;
|
|
}
|
|
|
|
/// ParseObjCBoolLiteral - This handles the objective-c Boolean literals.
|
|
///
|
|
/// '__objc_yes'
|
|
/// '__objc_no'
|
|
ExprResult Parser::ParseObjCBoolLiteral() {
|
|
tok::TokenKind Kind = Tok.getKind();
|
|
return Actions.ActOnObjCBoolLiteral(ConsumeToken(), Kind);
|
|
}
|
|
|
|
/// Validate availability spec list, emitting diagnostics if necessary. Returns
|
|
/// true if invalid.
|
|
static bool CheckAvailabilitySpecList(Parser &P,
|
|
ArrayRef<AvailabilitySpec> AvailSpecs) {
|
|
llvm::SmallSet<StringRef, 4> Platforms;
|
|
bool HasOtherPlatformSpec = false;
|
|
bool Valid = true;
|
|
for (const auto &Spec : AvailSpecs) {
|
|
if (Spec.isOtherPlatformSpec()) {
|
|
if (HasOtherPlatformSpec) {
|
|
P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_star);
|
|
Valid = false;
|
|
}
|
|
|
|
HasOtherPlatformSpec = true;
|
|
continue;
|
|
}
|
|
|
|
bool Inserted = Platforms.insert(Spec.getPlatform()).second;
|
|
if (!Inserted) {
|
|
// Rule out multiple version specs referring to the same platform.
|
|
// For example, we emit an error for:
|
|
// @available(macos 10.10, macos 10.11, *)
|
|
StringRef Platform = Spec.getPlatform();
|
|
P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_platform)
|
|
<< Spec.getEndLoc() << Platform;
|
|
Valid = false;
|
|
}
|
|
}
|
|
|
|
if (!HasOtherPlatformSpec) {
|
|
SourceLocation InsertWildcardLoc = AvailSpecs.back().getEndLoc();
|
|
P.Diag(InsertWildcardLoc, diag::err_availability_query_wildcard_required)
|
|
<< FixItHint::CreateInsertion(InsertWildcardLoc, ", *");
|
|
return true;
|
|
}
|
|
|
|
return !Valid;
|
|
}
|
|
|
|
/// Parse availability query specification.
|
|
///
|
|
/// availability-spec:
|
|
/// '*'
|
|
/// identifier version-tuple
|
|
Optional<AvailabilitySpec> Parser::ParseAvailabilitySpec() {
|
|
if (Tok.is(tok::star)) {
|
|
return AvailabilitySpec(ConsumeToken());
|
|
} else {
|
|
// Parse the platform name.
|
|
if (Tok.is(tok::code_completion)) {
|
|
Actions.CodeCompleteAvailabilityPlatformName();
|
|
cutOffParsing();
|
|
return None;
|
|
}
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_avail_query_expected_platform_name);
|
|
return None;
|
|
}
|
|
|
|
IdentifierLoc *PlatformIdentifier = ParseIdentifierLoc();
|
|
SourceRange VersionRange;
|
|
VersionTuple Version = ParseVersionTuple(VersionRange);
|
|
|
|
if (Version.empty())
|
|
return None;
|
|
|
|
StringRef GivenPlatform = PlatformIdentifier->Ident->getName();
|
|
StringRef Platform =
|
|
AvailabilityAttr::canonicalizePlatformName(GivenPlatform);
|
|
|
|
if (AvailabilityAttr::getPrettyPlatformName(Platform).empty()) {
|
|
Diag(PlatformIdentifier->Loc,
|
|
diag::err_avail_query_unrecognized_platform_name)
|
|
<< GivenPlatform;
|
|
return None;
|
|
}
|
|
|
|
return AvailabilitySpec(Version, Platform, PlatformIdentifier->Loc,
|
|
VersionRange.getEnd());
|
|
}
|
|
}
|
|
|
|
ExprResult Parser::ParseAvailabilityCheckExpr(SourceLocation BeginLoc) {
|
|
assert(Tok.is(tok::kw___builtin_available) ||
|
|
Tok.isObjCAtKeyword(tok::objc_available));
|
|
|
|
// Eat the available or __builtin_available.
|
|
ConsumeToken();
|
|
|
|
BalancedDelimiterTracker Parens(*this, tok::l_paren);
|
|
if (Parens.expectAndConsume())
|
|
return ExprError();
|
|
|
|
SmallVector<AvailabilitySpec, 4> AvailSpecs;
|
|
bool HasError = false;
|
|
while (true) {
|
|
Optional<AvailabilitySpec> Spec = ParseAvailabilitySpec();
|
|
if (!Spec)
|
|
HasError = true;
|
|
else
|
|
AvailSpecs.push_back(*Spec);
|
|
|
|
if (!TryConsumeToken(tok::comma))
|
|
break;
|
|
}
|
|
|
|
if (HasError) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return ExprError();
|
|
}
|
|
|
|
CheckAvailabilitySpecList(*this, AvailSpecs);
|
|
|
|
if (Parens.consumeClose())
|
|
return ExprError();
|
|
|
|
return Actions.ActOnObjCAvailabilityCheckExpr(AvailSpecs, BeginLoc,
|
|
Parens.getCloseLocation());
|
|
}
|