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