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//===--- SemaType.cpp - Semantic Analysis for Types -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Chris Lattner and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements type-related semantic analysis.
//
//===----------------------------------------------------------------------===//
#include "Sema.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
using namespace llvm;
using namespace clang;
namespace {
/// BuiltinType - This class is used for builtin types like 'int'. Builtin
/// types are always canonical and have a literal name field.
class BuiltinType : public Type {
const char *Name;
public:
BuiltinType(const char *name) : Name(name) {}
virtual void dump() const;
};
}
// FIXME: REMOVE
#include <iostream>
void BuiltinType::dump() const {
std::cerr << Name;
}
void Sema::InitializeBuiltinTypes() {
assert(Context.VoidTy.isNull() && "Context reinitialized?");
// C99 6.2.5p19.
Context.VoidTy = new BuiltinType("void");
// C99 6.2.5p2.
Context.BoolTy = new BuiltinType("_Bool");
// C99 6.2.5p3.
Context.CharTy = new BuiltinType("char");
// C99 6.2.5p4.
Context.SignedCharTy = new BuiltinType("signed char");
Context.ShortTy = new BuiltinType("short");
Context.IntTy = new BuiltinType("int");
Context.LongTy = new BuiltinType("long");
Context.LongLongTy = new BuiltinType("long long");
// C99 6.2.5p6.
Context.UnsignedCharTy = new BuiltinType("unsigned char");
Context.UnsignedShortTy = new BuiltinType("unsigned short");
Context.UnsignedIntTy = new BuiltinType("unsigned int");
Context.UnsignedLongTy = new BuiltinType("unsigned long");
Context.UnsignedLongLongTy = new BuiltinType("unsigned long long");
// C99 6.2.5p10.
Context.FloatTy = new BuiltinType("float");
Context.DoubleTy = new BuiltinType("double");
Context.LongDoubleTy = new BuiltinType("long double");
// C99 6.2.5p11.
Context.FloatComplexTy = new BuiltinType("float _Complex");
Context.DoubleComplexTy = new BuiltinType("double _Complex");
Context.LongDoubleComplexTy = new BuiltinType("long double _Complex");
}
/// ConvertDeclSpecToType - Convert the specified declspec to the appropriate
/// type object. This returns null on error.
static TypeRef ConvertDeclSpecToType(const DeclSpec &DS, ASTContext &Ctx) {
// FIXME: Should move the logic from DeclSpec::Finish to here for validity
// checking.
switch (DS.TypeSpecType) {
default: return TypeRef(); // FIXME: Handle unimp cases!
case DeclSpec::TST_void: return Ctx.VoidTy;
case DeclSpec::TST_char:
if (DS.TypeSpecSign == DeclSpec::TSS_unspecified)
return Ctx.CharTy;
else if (DS.TypeSpecSign == DeclSpec::TSS_signed)
return Ctx.SignedCharTy;
else {
assert(DS.TypeSpecSign == DeclSpec::TSS_unsigned && "Unknown TSS value");
return Ctx.UnsignedCharTy;
}
case DeclSpec::TST_int:
if (DS.TypeSpecSign != DeclSpec::TSS_unsigned) {
switch (DS.TypeSpecWidth) {
case DeclSpec::TSW_unspecified: return Ctx.IntTy;
case DeclSpec::TSW_short: return Ctx.ShortTy;
case DeclSpec::TSW_long: return Ctx.LongTy;
case DeclSpec::TSW_longlong: return Ctx.LongLongTy;
}
} else {
switch (DS.TypeSpecWidth) {
case DeclSpec::TSW_unspecified: return Ctx.UnsignedIntTy;
case DeclSpec::TSW_short: return Ctx.UnsignedShortTy;
case DeclSpec::TSW_long: return Ctx.UnsignedLongTy;
case DeclSpec::TSW_longlong: return Ctx.UnsignedLongLongTy;
}
}
case DeclSpec::TST_float:
if (DS.TypeSpecComplex == DeclSpec::TSC_unspecified)
return Ctx.FloatTy;
assert(DS.TypeSpecComplex == DeclSpec::TSC_complex &&
"FIXME: imaginary types not supported yet!");
return Ctx.FloatComplexTy;
case DeclSpec::TST_double: {
bool isLong = DS.TypeSpecWidth == DeclSpec::TSW_long;
if (DS.TypeSpecComplex == DeclSpec::TSC_unspecified)
return isLong ? Ctx.LongDoubleTy : Ctx.DoubleTy;
assert(DS.TypeSpecComplex == DeclSpec::TSC_complex &&
"FIXME: imaginary types not supported yet!");
return isLong ? Ctx.LongDoubleComplexTy : Ctx.DoubleComplexTy;
}
case DeclSpec::TST_bool: // _Bool
return Ctx.BoolTy;
case DeclSpec::TST_decimal32: // _Decimal32
case DeclSpec::TST_decimal64: // _Decimal64
case DeclSpec::TST_decimal128: // _Decimal128
assert(0 && "FIXME: GNU decimal extensions not supported yet!");
//DeclSpec::TST_enum:
//DeclSpec::TST_union:
//DeclSpec::TST_struct:
//DeclSpec::TST_typedef:
}
}
/// GetTypeForDeclarator - Convert the type for the specified declarator to Type
/// instances.
TypeRef Sema::GetTypeForDeclarator(Declarator &D, Scope *S) {
TypeRef T = ConvertDeclSpecToType(D.getDeclSpec(), Context);
// Apply const/volatile/restrict qualifiers to T.
T = T.getQualifiedType(D.getDeclSpec().TypeQualifiers);
return T;
return TypeRef();
}
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