1981 lines
70 KiB
C++
1981 lines
70 KiB
C++
//===--- Parser.cpp - C Language Family Parser ----------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Parser interfaces.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Parse/Parser.h"
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#include "RAIIObjectsForParser.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/Parse/ParseDiagnostic.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 "llvm/Support/raw_ostream.h"
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using namespace clang;
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namespace {
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/// \brief A comment handler that passes comments found by the preprocessor
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/// to the parser action.
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class ActionCommentHandler : public CommentHandler {
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Sema &S;
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public:
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explicit ActionCommentHandler(Sema &S) : S(S) { }
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bool HandleComment(Preprocessor &PP, SourceRange Comment) override {
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S.ActOnComment(Comment);
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return false;
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}
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};
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} // end anonymous namespace
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IdentifierInfo *Parser::getSEHExceptKeyword() {
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// __except is accepted as a (contextual) keyword
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if (!Ident__except && (getLangOpts().MicrosoftExt || getLangOpts().Borland))
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Ident__except = PP.getIdentifierInfo("__except");
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return Ident__except;
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}
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Parser::Parser(Preprocessor &pp, Sema &actions, bool skipFunctionBodies)
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: PP(pp), Actions(actions), Diags(PP.getDiagnostics()),
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GreaterThanIsOperator(true), ColonIsSacred(false),
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InMessageExpression(false), TemplateParameterDepth(0),
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ParsingInObjCContainer(false) {
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SkipFunctionBodies = pp.isCodeCompletionEnabled() || skipFunctionBodies;
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Tok.startToken();
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Tok.setKind(tok::eof);
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Actions.CurScope = nullptr;
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NumCachedScopes = 0;
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ParenCount = BracketCount = BraceCount = 0;
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CurParsedObjCImpl = nullptr;
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// Add #pragma handlers. These are removed and destroyed in the
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// destructor.
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initializePragmaHandlers();
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CommentSemaHandler.reset(new ActionCommentHandler(actions));
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PP.addCommentHandler(CommentSemaHandler.get());
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PP.setCodeCompletionHandler(*this);
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}
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DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) {
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return Diags.Report(Loc, DiagID);
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}
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DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
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return Diag(Tok.getLocation(), DiagID);
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}
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/// \brief Emits a diagnostic suggesting parentheses surrounding a
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/// given range.
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///
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/// \param Loc The location where we'll emit the diagnostic.
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/// \param DK The kind of diagnostic to emit.
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/// \param ParenRange Source range enclosing code that should be parenthesized.
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void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK,
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SourceRange ParenRange) {
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SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd());
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if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) {
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// We can't display the parentheses, so just dig the
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// warning/error and return.
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Diag(Loc, DK);
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return;
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}
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Diag(Loc, DK)
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<< FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
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<< FixItHint::CreateInsertion(EndLoc, ")");
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}
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static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok) {
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switch (ExpectedTok) {
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case tok::semi:
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return Tok.is(tok::colon) || Tok.is(tok::comma); // : or , for ;
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default: return false;
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}
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}
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bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID,
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const char *Msg) {
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if (Tok.is(ExpectedTok) || Tok.is(tok::code_completion)) {
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ConsumeAnyToken();
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return false;
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}
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// Detect common single-character typos and resume.
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if (IsCommonTypo(ExpectedTok, Tok)) {
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SourceLocation Loc = Tok.getLocation();
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{
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DiagnosticBuilder DB = Diag(Loc, DiagID);
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DB << FixItHint::CreateReplacement(
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SourceRange(Loc), tok::getPunctuatorSpelling(ExpectedTok));
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if (DiagID == diag::err_expected)
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DB << ExpectedTok;
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else if (DiagID == diag::err_expected_after)
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DB << Msg << ExpectedTok;
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else
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DB << Msg;
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}
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// Pretend there wasn't a problem.
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ConsumeAnyToken();
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return false;
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}
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SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
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const char *Spelling = nullptr;
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if (EndLoc.isValid())
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Spelling = tok::getPunctuatorSpelling(ExpectedTok);
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DiagnosticBuilder DB =
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Spelling
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? Diag(EndLoc, DiagID) << FixItHint::CreateInsertion(EndLoc, Spelling)
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: Diag(Tok, DiagID);
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if (DiagID == diag::err_expected)
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DB << ExpectedTok;
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else if (DiagID == diag::err_expected_after)
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DB << Msg << ExpectedTok;
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else
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DB << Msg;
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return true;
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}
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bool Parser::ExpectAndConsumeSemi(unsigned DiagID) {
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if (TryConsumeToken(tok::semi))
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return false;
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if (Tok.is(tok::code_completion)) {
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handleUnexpectedCodeCompletionToken();
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return false;
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}
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if ((Tok.is(tok::r_paren) || Tok.is(tok::r_square)) &&
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NextToken().is(tok::semi)) {
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Diag(Tok, diag::err_extraneous_token_before_semi)
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<< PP.getSpelling(Tok)
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<< FixItHint::CreateRemoval(Tok.getLocation());
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ConsumeAnyToken(); // The ')' or ']'.
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ConsumeToken(); // The ';'.
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return false;
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}
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return ExpectAndConsume(tok::semi, DiagID);
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}
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void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, unsigned TST) {
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if (!Tok.is(tok::semi)) return;
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bool HadMultipleSemis = false;
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SourceLocation StartLoc = Tok.getLocation();
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SourceLocation EndLoc = Tok.getLocation();
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ConsumeToken();
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while ((Tok.is(tok::semi) && !Tok.isAtStartOfLine())) {
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HadMultipleSemis = true;
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EndLoc = Tok.getLocation();
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ConsumeToken();
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}
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// C++11 allows extra semicolons at namespace scope, but not in any of the
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// other contexts.
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if (Kind == OutsideFunction && getLangOpts().CPlusPlus) {
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if (getLangOpts().CPlusPlus11)
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Diag(StartLoc, diag::warn_cxx98_compat_top_level_semi)
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<< FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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else
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Diag(StartLoc, diag::ext_extra_semi_cxx11)
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<< FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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return;
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}
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if (Kind != AfterMemberFunctionDefinition || HadMultipleSemis)
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Diag(StartLoc, diag::ext_extra_semi)
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<< Kind << DeclSpec::getSpecifierName((DeclSpec::TST)TST,
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Actions.getASTContext().getPrintingPolicy())
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<< FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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else
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// A single semicolon is valid after a member function definition.
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Diag(StartLoc, diag::warn_extra_semi_after_mem_fn_def)
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<< FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
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}
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//===----------------------------------------------------------------------===//
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// Error recovery.
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//===----------------------------------------------------------------------===//
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static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R) {
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return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
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}
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/// SkipUntil - Read tokens until we get to the specified token, then consume
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/// it (unless no flag StopBeforeMatch). Because we cannot guarantee that the
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/// token will ever occur, this skips to the next token, or to some likely
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/// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
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/// character.
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///
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/// If SkipUntil finds the specified token, it returns true, otherwise it
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/// returns false.
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bool Parser::SkipUntil(ArrayRef<tok::TokenKind> Toks, SkipUntilFlags Flags) {
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// We always want this function to skip at least one token if the first token
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// isn't T and if not at EOF.
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bool isFirstTokenSkipped = true;
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while (1) {
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// If we found one of the tokens, stop and return true.
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for (unsigned i = 0, NumToks = Toks.size(); i != NumToks; ++i) {
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if (Tok.is(Toks[i])) {
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if (HasFlagsSet(Flags, StopBeforeMatch)) {
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// Noop, don't consume the token.
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} else {
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ConsumeAnyToken();
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}
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return true;
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}
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}
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// Important special case: The caller has given up and just wants us to
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// skip the rest of the file. Do this without recursing, since we can
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// get here precisely because the caller detected too much recursion.
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if (Toks.size() == 1 && Toks[0] == tok::eof &&
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!HasFlagsSet(Flags, StopAtSemi) &&
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!HasFlagsSet(Flags, StopAtCodeCompletion)) {
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while (Tok.isNot(tok::eof))
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ConsumeAnyToken();
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return true;
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}
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switch (Tok.getKind()) {
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case tok::eof:
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// Ran out of tokens.
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return false;
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case tok::annot_pragma_openmp_end:
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// Stop before an OpenMP pragma boundary.
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case tok::annot_module_begin:
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case tok::annot_module_end:
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case tok::annot_module_include:
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// Stop before we change submodules. They generally indicate a "good"
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// place to pick up parsing again (except in the special case where
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// we're trying to skip to EOF).
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return false;
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case tok::code_completion:
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if (!HasFlagsSet(Flags, StopAtCodeCompletion))
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handleUnexpectedCodeCompletionToken();
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return false;
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case tok::l_paren:
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// Recursively skip properly-nested parens.
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ConsumeParen();
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if (HasFlagsSet(Flags, StopAtCodeCompletion))
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SkipUntil(tok::r_paren, StopAtCodeCompletion);
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else
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SkipUntil(tok::r_paren);
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break;
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case tok::l_square:
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// Recursively skip properly-nested square brackets.
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ConsumeBracket();
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if (HasFlagsSet(Flags, StopAtCodeCompletion))
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SkipUntil(tok::r_square, StopAtCodeCompletion);
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else
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SkipUntil(tok::r_square);
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break;
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case tok::l_brace:
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// Recursively skip properly-nested braces.
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ConsumeBrace();
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if (HasFlagsSet(Flags, StopAtCodeCompletion))
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SkipUntil(tok::r_brace, StopAtCodeCompletion);
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else
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SkipUntil(tok::r_brace);
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break;
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// Okay, we found a ']' or '}' or ')', which we think should be balanced.
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// Since the user wasn't looking for this token (if they were, it would
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// already be handled), this isn't balanced. If there is a LHS token at a
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// higher level, we will assume that this matches the unbalanced token
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// and return it. Otherwise, this is a spurious RHS token, which we skip.
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case tok::r_paren:
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if (ParenCount && !isFirstTokenSkipped)
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return false; // Matches something.
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ConsumeParen();
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break;
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case tok::r_square:
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if (BracketCount && !isFirstTokenSkipped)
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return false; // Matches something.
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ConsumeBracket();
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break;
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case tok::r_brace:
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if (BraceCount && !isFirstTokenSkipped)
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return false; // Matches something.
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ConsumeBrace();
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break;
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case tok::string_literal:
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case tok::wide_string_literal:
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case tok::utf8_string_literal:
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case tok::utf16_string_literal:
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case tok::utf32_string_literal:
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ConsumeStringToken();
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break;
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case tok::semi:
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if (HasFlagsSet(Flags, StopAtSemi))
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return false;
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// FALL THROUGH.
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default:
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// Skip this token.
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ConsumeToken();
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break;
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}
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isFirstTokenSkipped = false;
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}
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}
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//===----------------------------------------------------------------------===//
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// Scope manipulation
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//===----------------------------------------------------------------------===//
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/// EnterScope - Start a new scope.
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void Parser::EnterScope(unsigned ScopeFlags) {
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if (NumCachedScopes) {
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Scope *N = ScopeCache[--NumCachedScopes];
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N->Init(getCurScope(), ScopeFlags);
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Actions.CurScope = N;
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} else {
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Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
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}
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}
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/// ExitScope - Pop a scope off the scope stack.
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void Parser::ExitScope() {
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assert(getCurScope() && "Scope imbalance!");
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// Inform the actions module that this scope is going away if there are any
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// decls in it.
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Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
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Scope *OldScope = getCurScope();
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Actions.CurScope = OldScope->getParent();
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if (NumCachedScopes == ScopeCacheSize)
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delete OldScope;
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else
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ScopeCache[NumCachedScopes++] = OldScope;
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}
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/// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
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/// this object does nothing.
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Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
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bool ManageFlags)
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: CurScope(ManageFlags ? Self->getCurScope() : nullptr) {
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if (CurScope) {
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OldFlags = CurScope->getFlags();
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CurScope->setFlags(ScopeFlags);
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}
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}
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/// Restore the flags for the current scope to what they were before this
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/// object overrode them.
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Parser::ParseScopeFlags::~ParseScopeFlags() {
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if (CurScope)
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CurScope->setFlags(OldFlags);
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}
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//===----------------------------------------------------------------------===//
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// C99 6.9: External Definitions.
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//===----------------------------------------------------------------------===//
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Parser::~Parser() {
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// If we still have scopes active, delete the scope tree.
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delete getCurScope();
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Actions.CurScope = nullptr;
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// Free the scope cache.
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for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
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delete ScopeCache[i];
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resetPragmaHandlers();
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PP.removeCommentHandler(CommentSemaHandler.get());
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PP.clearCodeCompletionHandler();
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assert(TemplateIds.empty() && "Still alive TemplateIdAnnotations around?");
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}
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/// Initialize - Warm up the parser.
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///
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void Parser::Initialize() {
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// Create the translation unit scope. Install it as the current scope.
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assert(getCurScope() == nullptr && "A scope is already active?");
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EnterScope(Scope::DeclScope);
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Actions.ActOnTranslationUnitScope(getCurScope());
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// Initialization for Objective-C context sensitive keywords recognition.
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// Referenced in Parser::ParseObjCTypeQualifierList.
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if (getLangOpts().ObjC1) {
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ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
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ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
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ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
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ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
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ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
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ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
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}
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Ident_instancetype = nullptr;
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Ident_final = nullptr;
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Ident_sealed = nullptr;
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Ident_override = nullptr;
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Ident_super = &PP.getIdentifierTable().get("super");
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if (getLangOpts().AltiVec) {
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Ident_vector = &PP.getIdentifierTable().get("vector");
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Ident_pixel = &PP.getIdentifierTable().get("pixel");
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Ident_bool = &PP.getIdentifierTable().get("bool");
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}
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Ident_introduced = nullptr;
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Ident_deprecated = nullptr;
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Ident_obsoleted = nullptr;
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Ident_unavailable = nullptr;
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Ident__except = nullptr;
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Ident__exception_code = Ident__exception_info = nullptr;
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Ident__abnormal_termination = Ident___exception_code = nullptr;
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Ident___exception_info = Ident___abnormal_termination = nullptr;
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Ident_GetExceptionCode = Ident_GetExceptionInfo = nullptr;
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Ident_AbnormalTermination = nullptr;
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if(getLangOpts().Borland) {
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Ident__exception_info = PP.getIdentifierInfo("_exception_info");
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Ident___exception_info = PP.getIdentifierInfo("__exception_info");
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Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
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Ident__exception_code = PP.getIdentifierInfo("_exception_code");
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Ident___exception_code = PP.getIdentifierInfo("__exception_code");
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Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
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Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
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Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
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Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
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PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
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PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
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PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
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PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
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PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
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PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
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PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
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PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
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PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
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}
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Actions.Initialize();
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// Prime the lexer look-ahead.
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ConsumeToken();
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}
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namespace {
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/// \brief RAIIObject to destroy the contents of a SmallVector of
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/// TemplateIdAnnotation pointers and clear the vector.
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class DestroyTemplateIdAnnotationsRAIIObj {
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SmallVectorImpl<TemplateIdAnnotation *> &Container;
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public:
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DestroyTemplateIdAnnotationsRAIIObj(SmallVectorImpl<TemplateIdAnnotation *>
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&Container)
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: Container(Container) {}
|
|
|
|
~DestroyTemplateIdAnnotationsRAIIObj() {
|
|
for (SmallVectorImpl<TemplateIdAnnotation *>::iterator I =
|
|
Container.begin(), E = Container.end();
|
|
I != E; ++I)
|
|
(*I)->Destroy();
|
|
Container.clear();
|
|
}
|
|
};
|
|
}
|
|
|
|
/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
|
|
/// action tells us to. This returns true if the EOF was encountered.
|
|
bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) {
|
|
DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
|
|
|
|
// Skip over the EOF token, flagging end of previous input for incremental
|
|
// processing
|
|
if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
|
|
ConsumeToken();
|
|
|
|
Result = DeclGroupPtrTy();
|
|
switch (Tok.getKind()) {
|
|
case tok::annot_pragma_unused:
|
|
HandlePragmaUnused();
|
|
return false;
|
|
|
|
case tok::annot_module_include:
|
|
Actions.ActOnModuleInclude(Tok.getLocation(),
|
|
reinterpret_cast<Module *>(
|
|
Tok.getAnnotationValue()));
|
|
ConsumeToken();
|
|
return false;
|
|
|
|
case tok::annot_module_begin:
|
|
case tok::annot_module_end:
|
|
// FIXME: Update visibility based on the submodule we're in.
|
|
ConsumeToken();
|
|
return false;
|
|
|
|
case tok::eof:
|
|
// Late template parsing can begin.
|
|
if (getLangOpts().DelayedTemplateParsing)
|
|
Actions.SetLateTemplateParser(LateTemplateParserCallback, this);
|
|
if (!PP.isIncrementalProcessingEnabled())
|
|
Actions.ActOnEndOfTranslationUnit();
|
|
//else don't tell Sema that we ended parsing: more input might come.
|
|
return true;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ParsedAttributesWithRange attrs(AttrFactory);
|
|
MaybeParseCXX11Attributes(attrs);
|
|
MaybeParseMicrosoftAttributes(attrs);
|
|
|
|
Result = ParseExternalDeclaration(attrs);
|
|
return false;
|
|
}
|
|
|
|
/// ParseExternalDeclaration:
|
|
///
|
|
/// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
|
|
/// function-definition
|
|
/// declaration
|
|
/// [GNU] asm-definition
|
|
/// [GNU] __extension__ external-declaration
|
|
/// [OBJC] objc-class-definition
|
|
/// [OBJC] objc-class-declaration
|
|
/// [OBJC] objc-alias-declaration
|
|
/// [OBJC] objc-protocol-definition
|
|
/// [OBJC] objc-method-definition
|
|
/// [OBJC] @end
|
|
/// [C++] linkage-specification
|
|
/// [GNU] asm-definition:
|
|
/// simple-asm-expr ';'
|
|
/// [C++11] empty-declaration
|
|
/// [C++11] attribute-declaration
|
|
///
|
|
/// [C++11] empty-declaration:
|
|
/// ';'
|
|
///
|
|
/// [C++0x/GNU] 'extern' 'template' declaration
|
|
Parser::DeclGroupPtrTy
|
|
Parser::ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
|
|
ParsingDeclSpec *DS) {
|
|
DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
|
|
ParenBraceBracketBalancer BalancerRAIIObj(*this);
|
|
|
|
if (PP.isCodeCompletionReached()) {
|
|
cutOffParsing();
|
|
return DeclGroupPtrTy();
|
|
}
|
|
|
|
Decl *SingleDecl = nullptr;
|
|
switch (Tok.getKind()) {
|
|
case tok::annot_pragma_vis:
|
|
HandlePragmaVisibility();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_pack:
|
|
HandlePragmaPack();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_msstruct:
|
|
HandlePragmaMSStruct();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_align:
|
|
HandlePragmaAlign();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_weak:
|
|
HandlePragmaWeak();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_weakalias:
|
|
HandlePragmaWeakAlias();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_redefine_extname:
|
|
HandlePragmaRedefineExtname();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_fp_contract:
|
|
HandlePragmaFPContract();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_opencl_extension:
|
|
HandlePragmaOpenCLExtension();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_openmp:
|
|
ParseOpenMPDeclarativeDirective();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_ms_pointers_to_members:
|
|
HandlePragmaMSPointersToMembers();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_ms_vtordisp:
|
|
HandlePragmaMSVtorDisp();
|
|
return DeclGroupPtrTy();
|
|
case tok::annot_pragma_ms_pragma:
|
|
HandlePragmaMSPragma();
|
|
return DeclGroupPtrTy();
|
|
case tok::semi:
|
|
// Either a C++11 empty-declaration or attribute-declaration.
|
|
SingleDecl = Actions.ActOnEmptyDeclaration(getCurScope(),
|
|
attrs.getList(),
|
|
Tok.getLocation());
|
|
ConsumeExtraSemi(OutsideFunction);
|
|
break;
|
|
case tok::r_brace:
|
|
Diag(Tok, diag::err_extraneous_closing_brace);
|
|
ConsumeBrace();
|
|
return DeclGroupPtrTy();
|
|
case tok::eof:
|
|
Diag(Tok, diag::err_expected_external_declaration);
|
|
return DeclGroupPtrTy();
|
|
case tok::kw___extension__: {
|
|
// __extension__ silences extension warnings in the subexpression.
|
|
ExtensionRAIIObject O(Diags); // Use RAII to do this.
|
|
ConsumeToken();
|
|
return ParseExternalDeclaration(attrs);
|
|
}
|
|
case tok::kw_asm: {
|
|
ProhibitAttributes(attrs);
|
|
|
|
SourceLocation StartLoc = Tok.getLocation();
|
|
SourceLocation EndLoc;
|
|
ExprResult Result(ParseSimpleAsm(&EndLoc));
|
|
|
|
ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
"top-level asm block");
|
|
|
|
if (Result.isInvalid())
|
|
return DeclGroupPtrTy();
|
|
SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
|
|
break;
|
|
}
|
|
case tok::at:
|
|
return ParseObjCAtDirectives();
|
|
case tok::minus:
|
|
case tok::plus:
|
|
if (!getLangOpts().ObjC1) {
|
|
Diag(Tok, diag::err_expected_external_declaration);
|
|
ConsumeToken();
|
|
return DeclGroupPtrTy();
|
|
}
|
|
SingleDecl = ParseObjCMethodDefinition();
|
|
break;
|
|
case tok::code_completion:
|
|
Actions.CodeCompleteOrdinaryName(getCurScope(),
|
|
CurParsedObjCImpl? Sema::PCC_ObjCImplementation
|
|
: Sema::PCC_Namespace);
|
|
cutOffParsing();
|
|
return DeclGroupPtrTy();
|
|
case tok::kw_using:
|
|
case tok::kw_namespace:
|
|
case tok::kw_typedef:
|
|
case tok::kw_template:
|
|
case tok::kw_export: // As in 'export template'
|
|
case tok::kw_static_assert:
|
|
case tok::kw__Static_assert:
|
|
// A function definition cannot start with any of these keywords.
|
|
{
|
|
SourceLocation DeclEnd;
|
|
StmtVector Stmts;
|
|
return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
|
|
}
|
|
|
|
case tok::kw_static:
|
|
// Parse (then ignore) 'static' prior to a template instantiation. This is
|
|
// a GCC extension that we intentionally do not support.
|
|
if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
|
|
Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
|
|
<< 0;
|
|
SourceLocation DeclEnd;
|
|
StmtVector Stmts;
|
|
return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
|
|
}
|
|
goto dont_know;
|
|
|
|
case tok::kw_inline:
|
|
if (getLangOpts().CPlusPlus) {
|
|
tok::TokenKind NextKind = NextToken().getKind();
|
|
|
|
// Inline namespaces. Allowed as an extension even in C++03.
|
|
if (NextKind == tok::kw_namespace) {
|
|
SourceLocation DeclEnd;
|
|
StmtVector Stmts;
|
|
return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
|
|
}
|
|
|
|
// Parse (then ignore) 'inline' prior to a template instantiation. This is
|
|
// a GCC extension that we intentionally do not support.
|
|
if (NextKind == tok::kw_template) {
|
|
Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
|
|
<< 1;
|
|
SourceLocation DeclEnd;
|
|
StmtVector Stmts;
|
|
return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
|
|
}
|
|
}
|
|
goto dont_know;
|
|
|
|
case tok::kw_extern:
|
|
if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
|
|
// Extern templates
|
|
SourceLocation ExternLoc = ConsumeToken();
|
|
SourceLocation TemplateLoc = ConsumeToken();
|
|
Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
|
|
diag::warn_cxx98_compat_extern_template :
|
|
diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
|
|
SourceLocation DeclEnd;
|
|
return Actions.ConvertDeclToDeclGroup(
|
|
ParseExplicitInstantiation(Declarator::FileContext,
|
|
ExternLoc, TemplateLoc, DeclEnd));
|
|
}
|
|
goto dont_know;
|
|
|
|
case tok::kw___if_exists:
|
|
case tok::kw___if_not_exists:
|
|
ParseMicrosoftIfExistsExternalDeclaration();
|
|
return DeclGroupPtrTy();
|
|
|
|
default:
|
|
dont_know:
|
|
// We can't tell whether this is a function-definition or declaration yet.
|
|
return ParseDeclarationOrFunctionDefinition(attrs, DS);
|
|
}
|
|
|
|
// This routine returns a DeclGroup, if the thing we parsed only contains a
|
|
// single decl, convert it now.
|
|
return Actions.ConvertDeclToDeclGroup(SingleDecl);
|
|
}
|
|
|
|
/// \brief Determine whether the current token, if it occurs after a
|
|
/// declarator, continues a declaration or declaration list.
|
|
bool Parser::isDeclarationAfterDeclarator() {
|
|
// Check for '= delete' or '= default'
|
|
if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
|
|
const Token &KW = NextToken();
|
|
if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
|
|
return false;
|
|
}
|
|
|
|
return Tok.is(tok::equal) || // int X()= -> not a function def
|
|
Tok.is(tok::comma) || // int X(), -> not a function def
|
|
Tok.is(tok::semi) || // int X(); -> not a function def
|
|
Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
|
|
Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
|
|
(getLangOpts().CPlusPlus &&
|
|
Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
|
|
}
|
|
|
|
/// \brief Determine whether the current token, if it occurs after a
|
|
/// declarator, indicates the start of a function definition.
|
|
bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
|
|
assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
|
|
if (Tok.is(tok::l_brace)) // int X() {}
|
|
return true;
|
|
|
|
// Handle K&R C argument lists: int X(f) int f; {}
|
|
if (!getLangOpts().CPlusPlus &&
|
|
Declarator.getFunctionTypeInfo().isKNRPrototype())
|
|
return isDeclarationSpecifier();
|
|
|
|
if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
|
|
const Token &KW = NextToken();
|
|
return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
|
|
}
|
|
|
|
return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
|
|
Tok.is(tok::kw_try); // X() try { ... }
|
|
}
|
|
|
|
/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or
|
|
/// a declaration. We can't tell which we have until we read up to the
|
|
/// compound-statement in function-definition. TemplateParams, if
|
|
/// non-NULL, provides the template parameters when we're parsing a
|
|
/// C++ template-declaration.
|
|
///
|
|
/// function-definition: [C99 6.9.1]
|
|
/// decl-specs declarator declaration-list[opt] compound-statement
|
|
/// [C90] function-definition: [C99 6.7.1] - implicit int result
|
|
/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
|
|
///
|
|
/// declaration: [C99 6.7]
|
|
/// declaration-specifiers init-declarator-list[opt] ';'
|
|
/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
|
|
/// [OMP] threadprivate-directive [TODO]
|
|
///
|
|
Parser::DeclGroupPtrTy
|
|
Parser::ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
|
|
ParsingDeclSpec &DS,
|
|
AccessSpecifier AS) {
|
|
// Parse the common declaration-specifiers piece.
|
|
ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC_top_level);
|
|
|
|
// If we had a free-standing type definition with a missing semicolon, we
|
|
// may get this far before the problem becomes obvious.
|
|
if (DS.hasTagDefinition() &&
|
|
DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_top_level))
|
|
return DeclGroupPtrTy();
|
|
|
|
// C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
|
|
// declaration-specifiers init-declarator-list[opt] ';'
|
|
if (Tok.is(tok::semi)) {
|
|
ProhibitAttributes(attrs);
|
|
ConsumeToken();
|
|
Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS);
|
|
DS.complete(TheDecl);
|
|
return Actions.ConvertDeclToDeclGroup(TheDecl);
|
|
}
|
|
|
|
DS.takeAttributesFrom(attrs);
|
|
|
|
// ObjC2 allows prefix attributes on class interfaces and protocols.
|
|
// FIXME: This still needs better diagnostics. We should only accept
|
|
// attributes here, no types, etc.
|
|
if (getLangOpts().ObjC2 && Tok.is(tok::at)) {
|
|
SourceLocation AtLoc = ConsumeToken(); // the "@"
|
|
if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
|
|
!Tok.isObjCAtKeyword(tok::objc_protocol)) {
|
|
Diag(Tok, diag::err_objc_unexpected_attr);
|
|
SkipUntil(tok::semi); // FIXME: better skip?
|
|
return DeclGroupPtrTy();
|
|
}
|
|
|
|
DS.abort();
|
|
|
|
const char *PrevSpec = nullptr;
|
|
unsigned DiagID;
|
|
if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID,
|
|
Actions.getASTContext().getPrintingPolicy()))
|
|
Diag(AtLoc, DiagID) << PrevSpec;
|
|
|
|
if (Tok.isObjCAtKeyword(tok::objc_protocol))
|
|
return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
|
|
|
|
return Actions.ConvertDeclToDeclGroup(
|
|
ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
|
|
}
|
|
|
|
// If the declspec consisted only of 'extern' and we have a string
|
|
// literal following it, this must be a C++ linkage specifier like
|
|
// 'extern "C"'.
|
|
if (getLangOpts().CPlusPlus && isTokenStringLiteral() &&
|
|
DS.getStorageClassSpec() == DeclSpec::SCS_extern &&
|
|
DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) {
|
|
Decl *TheDecl = ParseLinkage(DS, Declarator::FileContext);
|
|
return Actions.ConvertDeclToDeclGroup(TheDecl);
|
|
}
|
|
|
|
return ParseDeclGroup(DS, Declarator::FileContext, true);
|
|
}
|
|
|
|
Parser::DeclGroupPtrTy
|
|
Parser::ParseDeclarationOrFunctionDefinition(ParsedAttributesWithRange &attrs,
|
|
ParsingDeclSpec *DS,
|
|
AccessSpecifier AS) {
|
|
if (DS) {
|
|
return ParseDeclOrFunctionDefInternal(attrs, *DS, AS);
|
|
} else {
|
|
ParsingDeclSpec PDS(*this);
|
|
// Must temporarily exit the objective-c container scope for
|
|
// parsing c constructs and re-enter objc container scope
|
|
// afterwards.
|
|
ObjCDeclContextSwitch ObjCDC(*this);
|
|
|
|
return ParseDeclOrFunctionDefInternal(attrs, PDS, AS);
|
|
}
|
|
}
|
|
|
|
/// ParseFunctionDefinition - We parsed and verified that the specified
|
|
/// Declarator is well formed. If this is a K&R-style function, read the
|
|
/// parameters declaration-list, then start the compound-statement.
|
|
///
|
|
/// function-definition: [C99 6.9.1]
|
|
/// decl-specs declarator declaration-list[opt] compound-statement
|
|
/// [C90] function-definition: [C99 6.7.1] - implicit int result
|
|
/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
|
|
/// [C++] function-definition: [C++ 8.4]
|
|
/// decl-specifier-seq[opt] declarator ctor-initializer[opt]
|
|
/// function-body
|
|
/// [C++] function-definition: [C++ 8.4]
|
|
/// decl-specifier-seq[opt] declarator function-try-block
|
|
///
|
|
Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
|
|
const ParsedTemplateInfo &TemplateInfo,
|
|
LateParsedAttrList *LateParsedAttrs) {
|
|
// Poison the SEH identifiers so they are flagged as illegal in function bodies
|
|
PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
|
|
const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
|
|
|
|
// If this is C90 and the declspecs were completely missing, fudge in an
|
|
// implicit int. We do this here because this is the only place where
|
|
// declaration-specifiers are completely optional in the grammar.
|
|
if (getLangOpts().ImplicitInt && D.getDeclSpec().isEmpty()) {
|
|
const char *PrevSpec;
|
|
unsigned DiagID;
|
|
const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
|
|
D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int,
|
|
D.getIdentifierLoc(),
|
|
PrevSpec, DiagID,
|
|
Policy);
|
|
D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin());
|
|
}
|
|
|
|
// If this declaration was formed with a K&R-style identifier list for the
|
|
// arguments, parse declarations for all of the args next.
|
|
// int foo(a,b) int a; float b; {}
|
|
if (FTI.isKNRPrototype())
|
|
ParseKNRParamDeclarations(D);
|
|
|
|
// We should have either an opening brace or, in a C++ constructor,
|
|
// we may have a colon.
|
|
if (Tok.isNot(tok::l_brace) &&
|
|
(!getLangOpts().CPlusPlus ||
|
|
(Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
|
|
Tok.isNot(tok::equal)))) {
|
|
Diag(Tok, diag::err_expected_fn_body);
|
|
|
|
// Skip over garbage, until we get to '{'. Don't eat the '{'.
|
|
SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
|
|
|
|
// If we didn't find the '{', bail out.
|
|
if (Tok.isNot(tok::l_brace))
|
|
return nullptr;
|
|
}
|
|
|
|
// Check to make sure that any normal attributes are allowed to be on
|
|
// a definition. Late parsed attributes are checked at the end.
|
|
if (Tok.isNot(tok::equal)) {
|
|
AttributeList *DtorAttrs = D.getAttributes();
|
|
while (DtorAttrs) {
|
|
if (DtorAttrs->isKnownToGCC() &&
|
|
!DtorAttrs->isCXX11Attribute()) {
|
|
Diag(DtorAttrs->getLoc(), diag::warn_attribute_on_function_definition)
|
|
<< DtorAttrs->getName();
|
|
}
|
|
DtorAttrs = DtorAttrs->getNext();
|
|
}
|
|
}
|
|
|
|
// In delayed template parsing mode, for function template we consume the
|
|
// tokens and store them for late parsing at the end of the translation unit.
|
|
if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
|
|
TemplateInfo.Kind == ParsedTemplateInfo::Template &&
|
|
Actions.canDelayFunctionBody(D)) {
|
|
MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
|
|
|
|
ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
|
|
Scope *ParentScope = getCurScope()->getParent();
|
|
|
|
D.setFunctionDefinitionKind(FDK_Definition);
|
|
Decl *DP = Actions.HandleDeclarator(ParentScope, D,
|
|
TemplateParameterLists);
|
|
D.complete(DP);
|
|
D.getMutableDeclSpec().abort();
|
|
|
|
CachedTokens Toks;
|
|
LexTemplateFunctionForLateParsing(Toks);
|
|
|
|
if (DP) {
|
|
FunctionDecl *FnD = DP->getAsFunction();
|
|
Actions.CheckForFunctionRedefinition(FnD);
|
|
Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
|
|
}
|
|
return DP;
|
|
}
|
|
else if (CurParsedObjCImpl &&
|
|
!TemplateInfo.TemplateParams &&
|
|
(Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
|
|
Tok.is(tok::colon)) &&
|
|
Actions.CurContext->isTranslationUnit()) {
|
|
ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
|
|
Scope *ParentScope = getCurScope()->getParent();
|
|
|
|
D.setFunctionDefinitionKind(FDK_Definition);
|
|
Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
|
|
MultiTemplateParamsArg());
|
|
D.complete(FuncDecl);
|
|
D.getMutableDeclSpec().abort();
|
|
if (FuncDecl) {
|
|
// Consume the tokens and store them for later parsing.
|
|
StashAwayMethodOrFunctionBodyTokens(FuncDecl);
|
|
CurParsedObjCImpl->HasCFunction = true;
|
|
return FuncDecl;
|
|
}
|
|
// FIXME: Should we really fall through here?
|
|
}
|
|
|
|
// Enter a scope for the function body.
|
|
ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
|
|
|
|
// Tell the actions module that we have entered a function definition with the
|
|
// specified Declarator for the function.
|
|
Decl *Res = TemplateInfo.TemplateParams?
|
|
Actions.ActOnStartOfFunctionTemplateDef(getCurScope(),
|
|
*TemplateInfo.TemplateParams, D)
|
|
: Actions.ActOnStartOfFunctionDef(getCurScope(), D);
|
|
|
|
// Break out of the ParsingDeclarator context before we parse the body.
|
|
D.complete(Res);
|
|
|
|
// Break out of the ParsingDeclSpec context, too. This const_cast is
|
|
// safe because we're always the sole owner.
|
|
D.getMutableDeclSpec().abort();
|
|
|
|
if (TryConsumeToken(tok::equal)) {
|
|
assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
|
|
Actions.ActOnFinishFunctionBody(Res, nullptr, false);
|
|
|
|
bool Delete = false;
|
|
SourceLocation KWLoc;
|
|
if (TryConsumeToken(tok::kw_delete, KWLoc)) {
|
|
Diag(KWLoc, getLangOpts().CPlusPlus11
|
|
? diag::warn_cxx98_compat_deleted_function
|
|
: diag::ext_deleted_function);
|
|
Actions.SetDeclDeleted(Res, KWLoc);
|
|
Delete = true;
|
|
} else if (TryConsumeToken(tok::kw_default, KWLoc)) {
|
|
Diag(KWLoc, getLangOpts().CPlusPlus11
|
|
? diag::warn_cxx98_compat_defaulted_function
|
|
: diag::ext_defaulted_function);
|
|
Actions.SetDeclDefaulted(Res, KWLoc);
|
|
} else {
|
|
llvm_unreachable("function definition after = not 'delete' or 'default'");
|
|
}
|
|
|
|
if (Tok.is(tok::comma)) {
|
|
Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
|
|
<< Delete;
|
|
SkipUntil(tok::semi);
|
|
} else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
Delete ? "delete" : "default")) {
|
|
SkipUntil(tok::semi);
|
|
}
|
|
|
|
return Res;
|
|
}
|
|
|
|
if (Tok.is(tok::kw_try))
|
|
return ParseFunctionTryBlock(Res, BodyScope);
|
|
|
|
// If we have a colon, then we're probably parsing a C++
|
|
// ctor-initializer.
|
|
if (Tok.is(tok::colon)) {
|
|
ParseConstructorInitializer(Res);
|
|
|
|
// Recover from error.
|
|
if (!Tok.is(tok::l_brace)) {
|
|
BodyScope.Exit();
|
|
Actions.ActOnFinishFunctionBody(Res, nullptr);
|
|
return Res;
|
|
}
|
|
} else
|
|
Actions.ActOnDefaultCtorInitializers(Res);
|
|
|
|
// Late attributes are parsed in the same scope as the function body.
|
|
if (LateParsedAttrs)
|
|
ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
|
|
|
|
return ParseFunctionStatementBody(Res, BodyScope);
|
|
}
|
|
|
|
/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
|
|
/// types for a function with a K&R-style identifier list for arguments.
|
|
void Parser::ParseKNRParamDeclarations(Declarator &D) {
|
|
// We know that the top-level of this declarator is a function.
|
|
DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
|
|
|
|
// Enter function-declaration scope, limiting any declarators to the
|
|
// function prototype scope, including parameter declarators.
|
|
ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
|
|
Scope::FunctionDeclarationScope | Scope::DeclScope);
|
|
|
|
// Read all the argument declarations.
|
|
while (isDeclarationSpecifier()) {
|
|
SourceLocation DSStart = Tok.getLocation();
|
|
|
|
// Parse the common declaration-specifiers piece.
|
|
DeclSpec DS(AttrFactory);
|
|
ParseDeclarationSpecifiers(DS);
|
|
|
|
// C99 6.9.1p6: 'each declaration in the declaration list shall have at
|
|
// least one declarator'.
|
|
// NOTE: GCC just makes this an ext-warn. It's not clear what it does with
|
|
// the declarations though. It's trivial to ignore them, really hard to do
|
|
// anything else with them.
|
|
if (TryConsumeToken(tok::semi)) {
|
|
Diag(DSStart, diag::err_declaration_does_not_declare_param);
|
|
continue;
|
|
}
|
|
|
|
// C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
|
|
// than register.
|
|
if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified &&
|
|
DS.getStorageClassSpec() != DeclSpec::SCS_register) {
|
|
Diag(DS.getStorageClassSpecLoc(),
|
|
diag::err_invalid_storage_class_in_func_decl);
|
|
DS.ClearStorageClassSpecs();
|
|
}
|
|
if (DS.getThreadStorageClassSpec() != DeclSpec::TSCS_unspecified) {
|
|
Diag(DS.getThreadStorageClassSpecLoc(),
|
|
diag::err_invalid_storage_class_in_func_decl);
|
|
DS.ClearStorageClassSpecs();
|
|
}
|
|
|
|
// Parse the first declarator attached to this declspec.
|
|
Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext);
|
|
ParseDeclarator(ParmDeclarator);
|
|
|
|
// Handle the full declarator list.
|
|
while (1) {
|
|
// If attributes are present, parse them.
|
|
MaybeParseGNUAttributes(ParmDeclarator);
|
|
|
|
// Ask the actions module to compute the type for this declarator.
|
|
Decl *Param =
|
|
Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
|
|
|
|
if (Param &&
|
|
// A missing identifier has already been diagnosed.
|
|
ParmDeclarator.getIdentifier()) {
|
|
|
|
// Scan the argument list looking for the correct param to apply this
|
|
// type.
|
|
for (unsigned i = 0; ; ++i) {
|
|
// C99 6.9.1p6: those declarators shall declare only identifiers from
|
|
// the identifier list.
|
|
if (i == FTI.NumParams) {
|
|
Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
|
|
<< ParmDeclarator.getIdentifier();
|
|
break;
|
|
}
|
|
|
|
if (FTI.Params[i].Ident == ParmDeclarator.getIdentifier()) {
|
|
// Reject redefinitions of parameters.
|
|
if (FTI.Params[i].Param) {
|
|
Diag(ParmDeclarator.getIdentifierLoc(),
|
|
diag::err_param_redefinition)
|
|
<< ParmDeclarator.getIdentifier();
|
|
} else {
|
|
FTI.Params[i].Param = Param;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If we don't have a comma, it is either the end of the list (a ';') or
|
|
// an error, bail out.
|
|
if (Tok.isNot(tok::comma))
|
|
break;
|
|
|
|
ParmDeclarator.clear();
|
|
|
|
// Consume the comma.
|
|
ParmDeclarator.setCommaLoc(ConsumeToken());
|
|
|
|
// Parse the next declarator.
|
|
ParseDeclarator(ParmDeclarator);
|
|
}
|
|
|
|
// Consume ';' and continue parsing.
|
|
if (!ExpectAndConsumeSemi(diag::err_expected_semi_declaration))
|
|
continue;
|
|
|
|
// Otherwise recover by skipping to next semi or mandatory function body.
|
|
if (SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch))
|
|
break;
|
|
TryConsumeToken(tok::semi);
|
|
}
|
|
|
|
// The actions module must verify that all arguments were declared.
|
|
Actions.ActOnFinishKNRParamDeclarations(getCurScope(), D, Tok.getLocation());
|
|
}
|
|
|
|
|
|
/// ParseAsmStringLiteral - This is just a normal string-literal, but is not
|
|
/// allowed to be a wide string, and is not subject to character translation.
|
|
///
|
|
/// [GNU] asm-string-literal:
|
|
/// string-literal
|
|
///
|
|
Parser::ExprResult Parser::ParseAsmStringLiteral() {
|
|
switch (Tok.getKind()) {
|
|
case tok::string_literal:
|
|
break;
|
|
case tok::utf8_string_literal:
|
|
case tok::utf16_string_literal:
|
|
case tok::utf32_string_literal:
|
|
case tok::wide_string_literal: {
|
|
SourceLocation L = Tok.getLocation();
|
|
Diag(Tok, diag::err_asm_operand_wide_string_literal)
|
|
<< (Tok.getKind() == tok::wide_string_literal)
|
|
<< SourceRange(L, L);
|
|
return ExprError();
|
|
}
|
|
default:
|
|
Diag(Tok, diag::err_expected_string_literal)
|
|
<< /*Source='in...'*/0 << "'asm'";
|
|
return ExprError();
|
|
}
|
|
|
|
return ParseStringLiteralExpression();
|
|
}
|
|
|
|
/// ParseSimpleAsm
|
|
///
|
|
/// [GNU] simple-asm-expr:
|
|
/// 'asm' '(' asm-string-literal ')'
|
|
///
|
|
Parser::ExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) {
|
|
assert(Tok.is(tok::kw_asm) && "Not an asm!");
|
|
SourceLocation Loc = ConsumeToken();
|
|
|
|
if (Tok.is(tok::kw_volatile)) {
|
|
// Remove from the end of 'asm' to the end of 'volatile'.
|
|
SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
|
|
PP.getLocForEndOfToken(Tok.getLocation()));
|
|
|
|
Diag(Tok, diag::warn_file_asm_volatile)
|
|
<< FixItHint::CreateRemoval(RemovalRange);
|
|
ConsumeToken();
|
|
}
|
|
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.consumeOpen()) {
|
|
Diag(Tok, diag::err_expected_lparen_after) << "asm";
|
|
return ExprError();
|
|
}
|
|
|
|
ExprResult Result(ParseAsmStringLiteral());
|
|
|
|
if (!Result.isInvalid()) {
|
|
// Close the paren and get the location of the end bracket
|
|
T.consumeClose();
|
|
if (EndLoc)
|
|
*EndLoc = T.getCloseLocation();
|
|
} else if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
|
|
if (EndLoc)
|
|
*EndLoc = Tok.getLocation();
|
|
ConsumeParen();
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
/// \brief Get the TemplateIdAnnotation from the token and put it in the
|
|
/// cleanup pool so that it gets destroyed when parsing the current top level
|
|
/// declaration is finished.
|
|
TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
|
|
assert(tok.is(tok::annot_template_id) && "Expected template-id token");
|
|
TemplateIdAnnotation *
|
|
Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
|
|
return Id;
|
|
}
|
|
|
|
void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
|
|
// Push the current token back into the token stream (or revert it if it is
|
|
// cached) and use an annotation scope token for current token.
|
|
if (PP.isBacktrackEnabled())
|
|
PP.RevertCachedTokens(1);
|
|
else
|
|
PP.EnterToken(Tok);
|
|
Tok.setKind(tok::annot_cxxscope);
|
|
Tok.setAnnotationValue(Actions.SaveNestedNameSpecifierAnnotation(SS));
|
|
Tok.setAnnotationRange(SS.getRange());
|
|
|
|
// In case the tokens were cached, have Preprocessor replace them
|
|
// with the annotation token. We don't need to do this if we've
|
|
// just reverted back to a prior state.
|
|
if (IsNewAnnotation)
|
|
PP.AnnotateCachedTokens(Tok);
|
|
}
|
|
|
|
/// \brief Attempt to classify the name at the current token position. This may
|
|
/// form a type, scope or primary expression annotation, or replace the token
|
|
/// with a typo-corrected keyword. This is only appropriate when the current
|
|
/// name must refer to an entity which has already been declared.
|
|
///
|
|
/// \param IsAddressOfOperand Must be \c true if the name is preceded by an '&'
|
|
/// and might possibly have a dependent nested name specifier.
|
|
/// \param CCC Indicates how to perform typo-correction for this name. If NULL,
|
|
/// no typo correction will be performed.
|
|
Parser::AnnotatedNameKind
|
|
Parser::TryAnnotateName(bool IsAddressOfOperand,
|
|
CorrectionCandidateCallback *CCC) {
|
|
assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
|
|
|
|
const bool EnteringContext = false;
|
|
const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
|
|
|
|
CXXScopeSpec SS;
|
|
if (getLangOpts().CPlusPlus &&
|
|
ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
|
|
return ANK_Error;
|
|
|
|
if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
|
|
if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
|
|
!WasScopeAnnotation))
|
|
return ANK_Error;
|
|
return ANK_Unresolved;
|
|
}
|
|
|
|
IdentifierInfo *Name = Tok.getIdentifierInfo();
|
|
SourceLocation NameLoc = Tok.getLocation();
|
|
|
|
// FIXME: Move the tentative declaration logic into ClassifyName so we can
|
|
// typo-correct to tentatively-declared identifiers.
|
|
if (isTentativelyDeclared(Name)) {
|
|
// Identifier has been tentatively declared, and thus cannot be resolved as
|
|
// an expression. Fall back to annotating it as a type.
|
|
if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
|
|
!WasScopeAnnotation))
|
|
return ANK_Error;
|
|
return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
|
|
}
|
|
|
|
Token Next = NextToken();
|
|
|
|
// Look up and classify the identifier. We don't perform any typo-correction
|
|
// after a scope specifier, because in general we can't recover from typos
|
|
// there (eg, after correcting 'A::tempalte B<X>::C' [sic], we would need to
|
|
// jump back into scope specifier parsing).
|
|
Sema::NameClassification Classification
|
|
= Actions.ClassifyName(getCurScope(), SS, Name, NameLoc, Next,
|
|
IsAddressOfOperand, SS.isEmpty() ? CCC : nullptr);
|
|
|
|
switch (Classification.getKind()) {
|
|
case Sema::NC_Error:
|
|
return ANK_Error;
|
|
|
|
case Sema::NC_Keyword:
|
|
// The identifier was typo-corrected to a keyword.
|
|
Tok.setIdentifierInfo(Name);
|
|
Tok.setKind(Name->getTokenID());
|
|
PP.TypoCorrectToken(Tok);
|
|
if (SS.isNotEmpty())
|
|
AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
// We've "annotated" this as a keyword.
|
|
return ANK_Success;
|
|
|
|
case Sema::NC_Unknown:
|
|
// It's not something we know about. Leave it unannotated.
|
|
break;
|
|
|
|
case Sema::NC_Type:
|
|
Tok.setKind(tok::annot_typename);
|
|
setTypeAnnotation(Tok, Classification.getType());
|
|
Tok.setAnnotationEndLoc(NameLoc);
|
|
if (SS.isNotEmpty())
|
|
Tok.setLocation(SS.getBeginLoc());
|
|
PP.AnnotateCachedTokens(Tok);
|
|
return ANK_Success;
|
|
|
|
case Sema::NC_Expression:
|
|
Tok.setKind(tok::annot_primary_expr);
|
|
setExprAnnotation(Tok, Classification.getExpression());
|
|
Tok.setAnnotationEndLoc(NameLoc);
|
|
if (SS.isNotEmpty())
|
|
Tok.setLocation(SS.getBeginLoc());
|
|
PP.AnnotateCachedTokens(Tok);
|
|
return ANK_Success;
|
|
|
|
case Sema::NC_TypeTemplate:
|
|
if (Next.isNot(tok::less)) {
|
|
// This may be a type template being used as a template template argument.
|
|
if (SS.isNotEmpty())
|
|
AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
return ANK_TemplateName;
|
|
}
|
|
// Fall through.
|
|
case Sema::NC_VarTemplate:
|
|
case Sema::NC_FunctionTemplate: {
|
|
// We have a type, variable or function template followed by '<'.
|
|
ConsumeToken();
|
|
UnqualifiedId Id;
|
|
Id.setIdentifier(Name, NameLoc);
|
|
if (AnnotateTemplateIdToken(
|
|
TemplateTy::make(Classification.getTemplateName()),
|
|
Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
|
|
return ANK_Error;
|
|
return ANK_Success;
|
|
}
|
|
|
|
case Sema::NC_NestedNameSpecifier:
|
|
llvm_unreachable("already parsed nested name specifier");
|
|
}
|
|
|
|
// Unable to classify the name, but maybe we can annotate a scope specifier.
|
|
if (SS.isNotEmpty())
|
|
AnnotateScopeToken(SS, !WasScopeAnnotation);
|
|
return ANK_Unresolved;
|
|
}
|
|
|
|
bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
|
|
assert(!Tok.is(tok::identifier) && !Tok.isAnnotation());
|
|
Diag(Tok, diag::ext_keyword_as_ident)
|
|
<< PP.getSpelling(Tok)
|
|
<< DisableKeyword;
|
|
if (DisableKeyword) {
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
ContextualKeywords[II] = Tok.getKind();
|
|
II->RevertTokenIDToIdentifier();
|
|
}
|
|
Tok.setKind(tok::identifier);
|
|
return true;
|
|
}
|
|
|
|
bool Parser::TryIdentKeywordUpgrade() {
|
|
assert(Tok.is(tok::identifier));
|
|
const IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
assert(II->hasRevertedTokenIDToIdentifier());
|
|
// 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<const IdentifierInfo *, tok::TokenKind>::iterator Known =
|
|
ContextualKeywords.find(II);
|
|
if (Known == ContextualKeywords.end())
|
|
return false;
|
|
Tok.setKind(Known->second);
|
|
return true;
|
|
}
|
|
|
|
/// TryAnnotateTypeOrScopeToken - If the current token position is on a
|
|
/// typename (possibly qualified in C++) or a C++ scope specifier not followed
|
|
/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
|
|
/// with a single annotation token representing the typename or C++ scope
|
|
/// respectively.
|
|
/// This simplifies handling of C++ scope specifiers and allows efficient
|
|
/// backtracking without the need to re-parse and resolve nested-names and
|
|
/// typenames.
|
|
/// It will mainly be called when we expect to treat identifiers as typenames
|
|
/// (if they are typenames). For example, in C we do not expect identifiers
|
|
/// inside expressions to be treated as typenames so it will not be called
|
|
/// for expressions in C.
|
|
/// The benefit for C/ObjC is that a typename will be annotated and
|
|
/// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
|
|
/// will not be called twice, once to check whether we have a declaration
|
|
/// specifier, and another one to get the actual type inside
|
|
/// ParseDeclarationSpecifiers).
|
|
///
|
|
/// This returns true if an error occurred.
|
|
///
|
|
/// Note that this routine emits an error if you call it with ::new or ::delete
|
|
/// as the current tokens, so only call it in contexts where these are invalid.
|
|
bool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext, bool NeedType) {
|
|
assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)
|
|
|| Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope)
|
|
|| Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id))
|
|
&& "Cannot be a type or scope token!");
|
|
|
|
if (Tok.is(tok::kw_typename)) {
|
|
// MSVC lets you do stuff like:
|
|
// typename typedef T_::D D;
|
|
//
|
|
// We will consume the typedef token here and put it back after we have
|
|
// parsed the first identifier, transforming it into something more like:
|
|
// typename T_::D typedef D;
|
|
if (getLangOpts().MSVCCompat && NextToken().is(tok::kw_typedef)) {
|
|
Token TypedefToken;
|
|
PP.Lex(TypedefToken);
|
|
bool Result = TryAnnotateTypeOrScopeToken(EnteringContext, NeedType);
|
|
PP.EnterToken(Tok);
|
|
Tok = TypedefToken;
|
|
if (!Result)
|
|
Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
|
|
return Result;
|
|
}
|
|
|
|
// Parse a C++ typename-specifier, e.g., "typename T::type".
|
|
//
|
|
// typename-specifier:
|
|
// 'typename' '::' [opt] nested-name-specifier identifier
|
|
// 'typename' '::' [opt] nested-name-specifier template [opt]
|
|
// simple-template-id
|
|
SourceLocation TypenameLoc = ConsumeToken();
|
|
CXXScopeSpec SS;
|
|
if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/ParsedType(),
|
|
/*EnteringContext=*/false,
|
|
nullptr, /*IsTypename*/ true))
|
|
return true;
|
|
if (!SS.isSet()) {
|
|
if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
|
|
Tok.is(tok::annot_decltype)) {
|
|
// Attempt to recover by skipping the invalid 'typename'
|
|
if (Tok.is(tok::annot_decltype) ||
|
|
(!TryAnnotateTypeOrScopeToken(EnteringContext, NeedType) &&
|
|
Tok.isAnnotation())) {
|
|
unsigned DiagID = diag::err_expected_qualified_after_typename;
|
|
// MS compatibility: MSVC permits using known types with typename.
|
|
// e.g. "typedef typename T* pointer_type"
|
|
if (getLangOpts().MicrosoftExt)
|
|
DiagID = diag::warn_expected_qualified_after_typename;
|
|
Diag(Tok.getLocation(), DiagID);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
|
|
return true;
|
|
}
|
|
|
|
TypeResult Ty;
|
|
if (Tok.is(tok::identifier)) {
|
|
// FIXME: check whether the next token is '<', first!
|
|
Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
|
|
*Tok.getIdentifierInfo(),
|
|
Tok.getLocation());
|
|
} else if (Tok.is(tok::annot_template_id)) {
|
|
TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
|
|
if (TemplateId->Kind != TNK_Type_template &&
|
|
TemplateId->Kind != TNK_Dependent_template_name) {
|
|
Diag(Tok, diag::err_typename_refers_to_non_type_template)
|
|
<< Tok.getAnnotationRange();
|
|
return true;
|
|
}
|
|
|
|
ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
|
|
TemplateId->NumArgs);
|
|
|
|
Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
|
|
TemplateId->TemplateKWLoc,
|
|
TemplateId->Template,
|
|
TemplateId->TemplateNameLoc,
|
|
TemplateId->LAngleLoc,
|
|
TemplateArgsPtr,
|
|
TemplateId->RAngleLoc);
|
|
} else {
|
|
Diag(Tok, diag::err_expected_type_name_after_typename)
|
|
<< SS.getRange();
|
|
return true;
|
|
}
|
|
|
|
SourceLocation EndLoc = Tok.getLastLoc();
|
|
Tok.setKind(tok::annot_typename);
|
|
setTypeAnnotation(Tok, Ty.isInvalid() ? ParsedType() : Ty.get());
|
|
Tok.setAnnotationEndLoc(EndLoc);
|
|
Tok.setLocation(TypenameLoc);
|
|
PP.AnnotateCachedTokens(Tok);
|
|
return false;
|
|
}
|
|
|
|
// Remembers whether the token was originally a scope annotation.
|
|
bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
|
|
|
|
CXXScopeSpec SS;
|
|
if (getLangOpts().CPlusPlus)
|
|
if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
|
|
return true;
|
|
|
|
return TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, NeedType,
|
|
SS, !WasScopeAnnotation);
|
|
}
|
|
|
|
/// \brief Try to annotate a type or scope token, having already parsed an
|
|
/// optional scope specifier. \p IsNewScope should be \c true unless the scope
|
|
/// specifier was extracted from an existing tok::annot_cxxscope annotation.
|
|
bool Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(bool EnteringContext,
|
|
bool NeedType,
|
|
CXXScopeSpec &SS,
|
|
bool IsNewScope) {
|
|
if (Tok.is(tok::identifier)) {
|
|
IdentifierInfo *CorrectedII = nullptr;
|
|
// Determine whether the identifier is a type name.
|
|
if (ParsedType Ty = Actions.getTypeName(*Tok.getIdentifierInfo(),
|
|
Tok.getLocation(), getCurScope(),
|
|
&SS, false,
|
|
NextToken().is(tok::period),
|
|
ParsedType(),
|
|
/*IsCtorOrDtorName=*/false,
|
|
/*NonTrivialTypeSourceInfo*/ true,
|
|
NeedType ? &CorrectedII
|
|
: nullptr)) {
|
|
// A FixIt was applied as a result of typo correction
|
|
if (CorrectedII)
|
|
Tok.setIdentifierInfo(CorrectedII);
|
|
// This is a typename. Replace the current token in-place with an
|
|
// annotation type token.
|
|
Tok.setKind(tok::annot_typename);
|
|
setTypeAnnotation(Tok, Ty);
|
|
Tok.setAnnotationEndLoc(Tok.getLocation());
|
|
if (SS.isNotEmpty()) // it was a C++ qualified type name.
|
|
Tok.setLocation(SS.getBeginLoc());
|
|
|
|
// In case the tokens were cached, have Preprocessor replace
|
|
// them with the annotation token.
|
|
PP.AnnotateCachedTokens(Tok);
|
|
return false;
|
|
}
|
|
|
|
if (!getLangOpts().CPlusPlus) {
|
|
// If we're in C, we can't have :: tokens at all (the lexer won't return
|
|
// them). If the identifier is not a type, then it can't be scope either,
|
|
// just early exit.
|
|
return false;
|
|
}
|
|
|
|
// If this is a template-id, annotate with a template-id or type token.
|
|
if (NextToken().is(tok::less)) {
|
|
TemplateTy Template;
|
|
UnqualifiedId TemplateName;
|
|
TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
|
|
bool MemberOfUnknownSpecialization;
|
|
if (TemplateNameKind TNK
|
|
= Actions.isTemplateName(getCurScope(), SS,
|
|
/*hasTemplateKeyword=*/false, TemplateName,
|
|
/*ObjectType=*/ ParsedType(),
|
|
EnteringContext,
|
|
Template, MemberOfUnknownSpecialization)) {
|
|
// Consume the identifier.
|
|
ConsumeToken();
|
|
if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
|
|
TemplateName)) {
|
|
// If an unrecoverable error occurred, we need to return true here,
|
|
// because the token stream is in a damaged state. We may not return
|
|
// a valid identifier.
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// The current token, which is either an identifier or a
|
|
// template-id, is not part of the annotation. Fall through to
|
|
// push that token back into the stream and complete the C++ scope
|
|
// specifier annotation.
|
|
}
|
|
|
|
if (Tok.is(tok::annot_template_id)) {
|
|
TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
|
|
if (TemplateId->Kind == TNK_Type_template) {
|
|
// A template-id that refers to a type was parsed into a
|
|
// template-id annotation in a context where we weren't allowed
|
|
// to produce a type annotation token. Update the template-id
|
|
// annotation token to a type annotation token now.
|
|
AnnotateTemplateIdTokenAsType();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (SS.isEmpty())
|
|
return false;
|
|
|
|
// A C++ scope specifier that isn't followed by a typename.
|
|
AnnotateScopeToken(SS, IsNewScope);
|
|
return false;
|
|
}
|
|
|
|
/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
|
|
/// annotates C++ scope specifiers and template-ids. This returns
|
|
/// true if there was an error that could not be recovered from.
|
|
///
|
|
/// Note that this routine emits an error if you call it with ::new or ::delete
|
|
/// as the current tokens, so only call it in contexts where these are invalid.
|
|
bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
|
|
assert(getLangOpts().CPlusPlus &&
|
|
"Call sites of this function should be guarded by checking for C++");
|
|
assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
|
|
(Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) ||
|
|
Tok.is(tok::kw_decltype)) && "Cannot be a type or scope token!");
|
|
|
|
CXXScopeSpec SS;
|
|
if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
|
|
return true;
|
|
if (SS.isEmpty())
|
|
return false;
|
|
|
|
AnnotateScopeToken(SS, true);
|
|
return false;
|
|
}
|
|
|
|
bool Parser::isTokenEqualOrEqualTypo() {
|
|
tok::TokenKind Kind = Tok.getKind();
|
|
switch (Kind) {
|
|
default:
|
|
return false;
|
|
case tok::ampequal: // &=
|
|
case tok::starequal: // *=
|
|
case tok::plusequal: // +=
|
|
case tok::minusequal: // -=
|
|
case tok::exclaimequal: // !=
|
|
case tok::slashequal: // /=
|
|
case tok::percentequal: // %=
|
|
case tok::lessequal: // <=
|
|
case tok::lesslessequal: // <<=
|
|
case tok::greaterequal: // >=
|
|
case tok::greatergreaterequal: // >>=
|
|
case tok::caretequal: // ^=
|
|
case tok::pipeequal: // |=
|
|
case tok::equalequal: // ==
|
|
Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
|
|
<< Kind
|
|
<< FixItHint::CreateReplacement(SourceRange(Tok.getLocation()), "=");
|
|
case tok::equal:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
|
|
assert(Tok.is(tok::code_completion));
|
|
PrevTokLocation = Tok.getLocation();
|
|
|
|
for (Scope *S = getCurScope(); S; S = S->getParent()) {
|
|
if (S->getFlags() & Scope::FnScope) {
|
|
Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_RecoveryInFunction);
|
|
cutOffParsing();
|
|
return PrevTokLocation;
|
|
}
|
|
|
|
if (S->getFlags() & Scope::ClassScope) {
|
|
Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Class);
|
|
cutOffParsing();
|
|
return PrevTokLocation;
|
|
}
|
|
}
|
|
|
|
Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Namespace);
|
|
cutOffParsing();
|
|
return PrevTokLocation;
|
|
}
|
|
|
|
// Anchor the Parser::FieldCallback vtable to this translation unit.
|
|
// We use a spurious method instead of the destructor because
|
|
// destroying FieldCallbacks can actually be slightly
|
|
// performance-sensitive.
|
|
void Parser::FieldCallback::_anchor() {
|
|
}
|
|
|
|
// Code-completion pass-through functions
|
|
|
|
void Parser::CodeCompleteDirective(bool InConditional) {
|
|
Actions.CodeCompletePreprocessorDirective(InConditional);
|
|
}
|
|
|
|
void Parser::CodeCompleteInConditionalExclusion() {
|
|
Actions.CodeCompleteInPreprocessorConditionalExclusion(getCurScope());
|
|
}
|
|
|
|
void Parser::CodeCompleteMacroName(bool IsDefinition) {
|
|
Actions.CodeCompletePreprocessorMacroName(IsDefinition);
|
|
}
|
|
|
|
void Parser::CodeCompletePreprocessorExpression() {
|
|
Actions.CodeCompletePreprocessorExpression();
|
|
}
|
|
|
|
void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
|
|
MacroInfo *MacroInfo,
|
|
unsigned ArgumentIndex) {
|
|
Actions.CodeCompletePreprocessorMacroArgument(getCurScope(), Macro, MacroInfo,
|
|
ArgumentIndex);
|
|
}
|
|
|
|
void Parser::CodeCompleteNaturalLanguage() {
|
|
Actions.CodeCompleteNaturalLanguage();
|
|
}
|
|
|
|
bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
|
|
assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
|
|
"Expected '__if_exists' or '__if_not_exists'");
|
|
Result.IsIfExists = Tok.is(tok::kw___if_exists);
|
|
Result.KeywordLoc = ConsumeToken();
|
|
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.consumeOpen()) {
|
|
Diag(Tok, diag::err_expected_lparen_after)
|
|
<< (Result.IsIfExists? "__if_exists" : "__if_not_exists");
|
|
return true;
|
|
}
|
|
|
|
// Parse nested-name-specifier.
|
|
ParseOptionalCXXScopeSpecifier(Result.SS, ParsedType(),
|
|
/*EnteringContext=*/false);
|
|
|
|
// Check nested-name specifier.
|
|
if (Result.SS.isInvalid()) {
|
|
T.skipToEnd();
|
|
return true;
|
|
}
|
|
|
|
// Parse the unqualified-id.
|
|
SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
|
|
if (ParseUnqualifiedId(Result.SS, false, true, true, ParsedType(),
|
|
TemplateKWLoc, Result.Name)) {
|
|
T.skipToEnd();
|
|
return true;
|
|
}
|
|
|
|
if (T.consumeClose())
|
|
return true;
|
|
|
|
// Check if the symbol exists.
|
|
switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
|
|
Result.IsIfExists, Result.SS,
|
|
Result.Name)) {
|
|
case Sema::IER_Exists:
|
|
Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
|
|
break;
|
|
|
|
case Sema::IER_DoesNotExist:
|
|
Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
|
|
break;
|
|
|
|
case Sema::IER_Dependent:
|
|
Result.Behavior = IEB_Dependent;
|
|
break;
|
|
|
|
case Sema::IER_Error:
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
|
|
IfExistsCondition Result;
|
|
if (ParseMicrosoftIfExistsCondition(Result))
|
|
return;
|
|
|
|
BalancedDelimiterTracker Braces(*this, tok::l_brace);
|
|
if (Braces.consumeOpen()) {
|
|
Diag(Tok, diag::err_expected) << tok::l_brace;
|
|
return;
|
|
}
|
|
|
|
switch (Result.Behavior) {
|
|
case IEB_Parse:
|
|
// Parse declarations below.
|
|
break;
|
|
|
|
case IEB_Dependent:
|
|
llvm_unreachable("Cannot have a dependent external declaration");
|
|
|
|
case IEB_Skip:
|
|
Braces.skipToEnd();
|
|
return;
|
|
}
|
|
|
|
// Parse the declarations.
|
|
// FIXME: Support module import within __if_exists?
|
|
while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
|
|
ParsedAttributesWithRange attrs(AttrFactory);
|
|
MaybeParseCXX11Attributes(attrs);
|
|
MaybeParseMicrosoftAttributes(attrs);
|
|
DeclGroupPtrTy Result = ParseExternalDeclaration(attrs);
|
|
if (Result && !getCurScope()->getParent())
|
|
Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
|
|
}
|
|
Braces.consumeClose();
|
|
}
|
|
|
|
Parser::DeclGroupPtrTy Parser::ParseModuleImport(SourceLocation AtLoc) {
|
|
assert(Tok.isObjCAtKeyword(tok::objc_import) &&
|
|
"Improper start to module import");
|
|
SourceLocation ImportLoc = ConsumeToken();
|
|
|
|
SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
|
|
|
|
// Parse the module path.
|
|
do {
|
|
if (!Tok.is(tok::identifier)) {
|
|
if (Tok.is(tok::code_completion)) {
|
|
Actions.CodeCompleteModuleImport(ImportLoc, Path);
|
|
cutOffParsing();
|
|
return DeclGroupPtrTy();
|
|
}
|
|
|
|
Diag(Tok, diag::err_module_expected_ident);
|
|
SkipUntil(tok::semi);
|
|
return DeclGroupPtrTy();
|
|
}
|
|
|
|
// Record this part of the module path.
|
|
Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
|
|
ConsumeToken();
|
|
|
|
if (Tok.is(tok::period)) {
|
|
ConsumeToken();
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
} while (true);
|
|
|
|
if (PP.hadModuleLoaderFatalFailure()) {
|
|
// With a fatal failure in the module loader, we abort parsing.
|
|
cutOffParsing();
|
|
return DeclGroupPtrTy();
|
|
}
|
|
|
|
DeclResult Import = Actions.ActOnModuleImport(AtLoc, ImportLoc, Path);
|
|
ExpectAndConsumeSemi(diag::err_module_expected_semi);
|
|
if (Import.isInvalid())
|
|
return DeclGroupPtrTy();
|
|
|
|
return Actions.ConvertDeclToDeclGroup(Import.get());
|
|
}
|
|
|
|
bool BalancedDelimiterTracker::diagnoseOverflow() {
|
|
P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
|
|
<< P.getLangOpts().BracketDepth;
|
|
P.Diag(P.Tok, diag::note_bracket_depth);
|
|
P.cutOffParsing();
|
|
return true;
|
|
}
|
|
|
|
bool BalancedDelimiterTracker::expectAndConsume(unsigned DiagID,
|
|
const char *Msg,
|
|
tok::TokenKind SkipToTok) {
|
|
LOpen = P.Tok.getLocation();
|
|
if (P.ExpectAndConsume(Kind, DiagID, Msg)) {
|
|
if (SkipToTok != tok::unknown)
|
|
P.SkipUntil(SkipToTok, Parser::StopAtSemi);
|
|
return true;
|
|
}
|
|
|
|
if (getDepth() < MaxDepth)
|
|
return false;
|
|
|
|
return diagnoseOverflow();
|
|
}
|
|
|
|
bool BalancedDelimiterTracker::diagnoseMissingClose() {
|
|
assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
|
|
|
|
P.Diag(P.Tok, diag::err_expected) << Close;
|
|
P.Diag(LOpen, diag::note_matching) << Kind;
|
|
|
|
// If we're not already at some kind of closing bracket, skip to our closing
|
|
// token.
|
|
if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
|
|
P.Tok.isNot(tok::r_square) &&
|
|
P.SkipUntil(Close, FinalToken,
|
|
Parser::StopAtSemi | Parser::StopBeforeMatch) &&
|
|
P.Tok.is(Close))
|
|
LClose = P.ConsumeAnyToken();
|
|
return true;
|
|
}
|
|
|
|
void BalancedDelimiterTracker::skipToEnd() {
|
|
P.SkipUntil(Close, Parser::StopBeforeMatch);
|
|
consumeClose();
|
|
}
|