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//===--- Sema.cpp - AST Builder and Semantic Analysis Implementation ------===//
//
// 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 the actions class which performs semantic analysis and
// builds an AST out of a parse stream.
//
//===----------------------------------------------------------------------===//
#include "Sema.h"
#include "clang/AST/ASTContext.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/Diagnostic.h"
using namespace clang;
void Sema::ActOnTranslationUnitScope(SourceLocation Loc, Scope *S) {
TUScope = S;
}
/// GetObjcIdType - The following method assumes that "id" is imported
/// via <objc/objc.h>. This is the way GCC worked for almost 20 years.
/// In GCC 4.0, "id" is now a built-in type. Unfortunately, typedefs *cannot* be
/// redefined (even if they are identical). To allow a built-in types to coexist
/// with <objc/objc.h>, GCC has a special hack on decls (DECL_IN_SYSTEM_HEADER).
/// For now, we will *not* install id as a built-in. FIXME: reconsider this.
QualType Sema::GetObjcIdType(SourceLocation Loc) {
assert(TUScope && "GetObjcIdType(): Top-level scope is null");
if (!Context.getObjcIdType().isNull())
return Context.getObjcIdType();
IdentifierInfo *IdIdent = &Context.Idents.get("id");
ScopedDecl *IdDecl = LookupScopedDecl(IdIdent, Decl::IDNS_Ordinary,
SourceLocation(), TUScope);
TypedefDecl *ObjcIdTypedef = dyn_cast_or_null<TypedefDecl>(IdDecl);
if (!ObjcIdTypedef) {
Diag(Loc, diag::err_missing_id_definition);
return QualType();
}
Context.setObjcIdType(ObjcIdTypedef);
return Context.getObjcIdType();
}
/// GetObjcSelType - See comments for Sema::GetObjcIdType above; replace "id"
/// with "SEL".
QualType Sema::GetObjcSelType(SourceLocation Loc) {
assert(TUScope && "GetObjcSelType(): Top-level scope is null");
if (Context.getObjcSelType().isNull()) {
IdentifierInfo *SelIdent = &Context.Idents.get("SEL");
ScopedDecl *SelDecl = LookupScopedDecl(SelIdent, Decl::IDNS_Ordinary,
SourceLocation(), TUScope);
TypedefDecl *ObjcSelTypedef = dyn_cast_or_null<TypedefDecl>(SelDecl);
if (!ObjcSelTypedef) {
Diag(Loc, diag::err_missing_sel_definition);
return QualType();
}
Context.setObjcSelType(ObjcSelTypedef);
}
return Context.getObjcSelType();
}
/// GetObjcProtoType - See comments for Sema::GetObjcIdType above; replace "id"
/// with "Protocol".
QualType Sema::GetObjcProtoType(SourceLocation Loc) {
assert(TUScope && "GetObjcProtoType(): Top-level scope is null");
if (Context.getObjcProtoType().isNull()) {
IdentifierInfo *ProtoIdent = &Context.Idents.get("Protocol");
ScopedDecl *ProtoDecl = LookupScopedDecl(ProtoIdent, Decl::IDNS_Ordinary,
SourceLocation(), TUScope);
TypedefDecl *ObjcProtoTypedef = dyn_cast_or_null<TypedefDecl>(ProtoDecl);
if (!ObjcProtoTypedef) {
Diag(Loc, diag::err_missing_proto_definition);
return QualType();
}
Context.setObjcProtoType(ObjcProtoTypedef);
}
return Context.getObjcProtoType();
}
/// GetObjcClassType - See comments for Sema::GetObjcIdType above; replace "id"
/// with "Protocol".
QualType Sema::GetObjcClassType(SourceLocation Loc) {
assert(TUScope && "GetObjcClassType(): Top-level scope is null");
if (!Context.getObjcClassType().isNull())
return Context.getObjcClassType();
IdentifierInfo *ClassIdent = &Context.Idents.get("Class");
ScopedDecl *ClassDecl = LookupScopedDecl(ClassIdent, Decl::IDNS_Ordinary,
SourceLocation(), TUScope);
TypedefDecl *ObjcClassTypedef = dyn_cast_or_null<TypedefDecl>(ClassDecl);
if (!ObjcClassTypedef) {
Diag(Loc, diag::err_missing_class_definition);
return QualType();
}
Context.setObjcClassType(ObjcClassTypedef);
return Context.getObjcClassType();
}
Sema::Sema(Preprocessor &pp, ASTContext &ctxt, std::vector<Decl*> &prevInGroup)
: PP(pp), Context(ctxt), CurFunctionDecl(0), LastInGroupList(prevInGroup) {
// Get IdentifierInfo objects for known functions for which we
// do extra checking.
IdentifierTable& IT = PP.getIdentifierTable();
KnownFunctionIDs[ id_printf ] = &IT.get("printf");
KnownFunctionIDs[ id_fprintf ] = &IT.get("fprintf");
KnownFunctionIDs[ id_sprintf ] = &IT.get("sprintf");
KnownFunctionIDs[ id_snprintf ] = &IT.get("snprintf");
KnownFunctionIDs[ id_asprintf ] = &IT.get("asprintf");
KnownFunctionIDs[ id_vsnprintf ] = &IT.get("vsnprintf");
KnownFunctionIDs[ id_vasprintf ] = &IT.get("vasprintf");
KnownFunctionIDs[ id_vfprintf ] = &IT.get("vfprintf");
KnownFunctionIDs[ id_vsprintf ] = &IT.get("vsprintf");
KnownFunctionIDs[ id_vprintf ] = &IT.get("vprintf");
TUScope = 0;
}
void Sema::DeleteExpr(ExprTy *E) {
delete static_cast<Expr*>(E);
}
void Sema::DeleteStmt(StmtTy *S) {
delete static_cast<Stmt*>(S);
}
//===----------------------------------------------------------------------===//
// Helper functions.
//===----------------------------------------------------------------------===//
bool Sema::Diag(SourceLocation Loc, unsigned DiagID) {
PP.getDiagnostics().Report(Loc, DiagID);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg) {
PP.getDiagnostics().Report(Loc, DiagID, &Msg, 1);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
const std::string &Msg2) {
std::string MsgArr[] = { Msg1, Msg2 };
PP.getDiagnostics().Report(Loc, DiagID, MsgArr, 2);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, SourceRange Range) {
PP.getDiagnostics().Report(Loc, DiagID, 0, 0, &Range, 1);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
SourceRange Range) {
PP.getDiagnostics().Report(Loc, DiagID, &Msg, 1, &Range, 1);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
const std::string &Msg2, SourceRange Range) {
std::string MsgArr[] = { Msg1, Msg2 };
PP.getDiagnostics().Report(Loc, DiagID, MsgArr, 2, &Range, 1);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID,
SourceRange R1, SourceRange R2) {
SourceRange RangeArr[] = { R1, R2 };
PP.getDiagnostics().Report(Loc, DiagID, 0, 0, RangeArr, 2);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
SourceRange R1, SourceRange R2) {
SourceRange RangeArr[] = { R1, R2 };
PP.getDiagnostics().Report(Loc, DiagID, &Msg, 1, RangeArr, 2);
return true;
}
bool Sema::Diag(SourceLocation Range, unsigned DiagID, const std::string &Msg1,
const std::string &Msg2, SourceRange R1, SourceRange R2) {
std::string MsgArr[] = { Msg1, Msg2 };
SourceRange RangeArr[] = { R1, R2 };
PP.getDiagnostics().Report(Range, DiagID, MsgArr, 2, RangeArr, 2);
return true;
}
const LangOptions &Sema::getLangOptions() const {
return PP.getLangOptions();
}
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