forked from OSchip/llvm-project
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
//===--- SemaStmtAttr.cpp - Statement Attribute Handling ------------------===//
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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 stmt-related attribute processing.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Sema/SemaInternal.h"
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#include "TargetAttributesSema.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Lex/Lexer.h"
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#include "clang/Sema/DelayedDiagnostic.h"
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#include "clang/Sema/Lookup.h"
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#include "clang/Sema/ScopeInfo.h"
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#include "llvm/ADT/StringExtras.h"
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using namespace clang;
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using namespace sema;
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static Attr *handleFallThroughAttr(Sema &S, Stmt *St, const AttributeList &A,
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SourceRange Range) {
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if (!isa<NullStmt>(St)) {
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S.Diag(A.getRange().getBegin(), diag::err_fallthrough_attr_wrong_target)
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<< St->getLocStart();
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if (isa<SwitchCase>(St)) {
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SourceLocation L = Lexer::getLocForEndOfToken(Range.getEnd(), 0,
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S.getSourceManager(), S.getLangOpts());
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S.Diag(L, diag::note_fallthrough_insert_semi_fixit)
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<< FixItHint::CreateInsertion(L, ";");
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}
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return 0;
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}
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if (S.getCurFunction()->SwitchStack.empty()) {
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S.Diag(A.getRange().getBegin(), diag::err_fallthrough_attr_outside_switch);
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return 0;
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}
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return ::new (S.Context) FallThroughAttr(A.getRange(), S.Context);
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}
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static Attr *ProcessStmtAttribute(Sema &S, Stmt *St, const AttributeList &A,
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SourceRange Range) {
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switch (A.getKind()) {
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case AttributeList::UnknownAttribute:
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S.Diag(A.getLoc(), A.isDeclspecAttribute() ?
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diag::warn_unhandled_ms_attribute_ignored :
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diag::warn_unknown_attribute_ignored) << A.getName();
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return 0;
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case AttributeList::AT_FallThrough:
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return handleFallThroughAttr(S, St, A, Range);
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default:
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// if we're here, then we parsed a known attribute, but didn't recognize
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// it as a statement attribute => it is declaration attribute
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S.Diag(A.getRange().getBegin(), diag::err_attribute_invalid_on_stmt)
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<< A.getName() << St->getLocStart();
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return 0;
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}
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}
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StmtResult Sema::ProcessStmtAttributes(Stmt *S, AttributeList *AttrList,
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SourceRange Range) {
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SmallVector<const Attr*, 8> Attrs;
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for (const AttributeList* l = AttrList; l; l = l->getNext()) {
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if (Attr *a = ProcessStmtAttribute(*this, S, *l, Range))
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Attrs.push_back(a);
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}
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if (Attrs.empty())
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return S;
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return ActOnAttributedStmt(Range.getBegin(), Attrs, S);
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}
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