forked from OSchip/llvm-project
70 lines
2.5 KiB
C++
70 lines
2.5 KiB
C++
//===--- SemaExprCXX.cpp - Semantic Analysis for Expressions --------------===//
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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 semantic analysis for C++ expressions.
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//
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//===----------------------------------------------------------------------===//
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#include "Sema.h"
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#include "clang/AST/ExprCXX.h"
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#include "clang/AST/ASTContext.h"
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using namespace clang;
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/// ActOnCXXCasts - Parse {dynamic,static,reinterpret,const}_cast's.
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Action::ExprResult
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Sema::ActOnCXXCasts(SourceLocation OpLoc, tok::TokenKind Kind,
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SourceLocation LAngleBracketLoc, TypeTy *Ty,
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SourceLocation RAngleBracketLoc,
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SourceLocation LParenLoc, ExprTy *E,
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SourceLocation RParenLoc) {
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CXXCastExpr::Opcode Op;
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switch (Kind) {
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default: assert(0 && "Unknown C++ cast!");
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case tok::kw_const_cast: Op = CXXCastExpr::ConstCast; break;
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case tok::kw_dynamic_cast: Op = CXXCastExpr::DynamicCast; break;
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case tok::kw_reinterpret_cast: Op = CXXCastExpr::ReinterpretCast; break;
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case tok::kw_static_cast: Op = CXXCastExpr::StaticCast; break;
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}
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return new CXXCastExpr(Op, QualType::getFromOpaquePtr(Ty), (Expr*)E, OpLoc);
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}
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/// ActOnCXXBoolLiteral - Parse {true,false} literals.
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Action::ExprResult
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Sema::ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) {
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assert((Kind != tok::kw_true || Kind != tok::kw_false) &&
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"Unknown C++ Boolean value!");
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return new CXXBoolLiteralExpr(Kind == tok::kw_true, Context.BoolTy, OpLoc);
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}
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/// ActOnCXXThrow - Parse throw expressions.
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Action::ExprResult
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Sema::ActOnCXXThrow(SourceLocation OpLoc, ExprTy *E) {
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return new CXXThrowExpr((Expr*)E, Context.VoidTy, OpLoc);
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}
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Action::ExprResult Sema::ActOnCXXThis(SourceLocation ThisLoc) {
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/// C++ 9.3.2: In the body of a non-static member function, the keyword this
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/// is a non-lvalue expression whose value is the address of the object for
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/// which the function is called.
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if (!isa<FunctionDecl>(CurContext)) {
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Diag(ThisLoc, diag::err_invalid_this_use);
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return ExprResult(true);
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}
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if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(CurContext))
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if (MD->isInstance())
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return new PreDefinedExpr(ThisLoc, MD->getThisType(Context),
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PreDefinedExpr::CXXThis);
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return Diag(ThisLoc, diag::err_invalid_this_use);
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}
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