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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"
#include "clang/Parse/Scope.h"
using namespace clang;
bool Sema::isBuiltinObjcType(TypedefDecl *TD) {
const char *typeName = TD->getIdentifier()->getName();
return strcmp(typeName, "id") == 0 || strcmp(typeName, "Class") == 0 ||
strcmp(typeName, "SEL") == 0;
}
void Sema::ActOnTranslationUnitScope(SourceLocation Loc, Scope *S) {
TUScope = S;
if (PP.getLangOptions().ObjC1) {
TypedefType *t;
// Add the built-in ObjC types.
t = dyn_cast<TypedefType>(Context.getObjcIdType().getTypePtr());
t->getDecl()->getIdentifier()->setFETokenInfo(t->getDecl());
TUScope->AddDecl(t->getDecl());
t = dyn_cast<TypedefType>(Context.getObjcClassType().getTypePtr());
t->getDecl()->getIdentifier()->setFETokenInfo(t->getDecl());
TUScope->AddDecl(t->getDecl());
t = dyn_cast<TypedefType>(Context.getObjcSelType().getTypePtr());
t->getDecl()->getIdentifier()->setFETokenInfo(t->getDecl());
TUScope->AddDecl(t->getDecl());
}
}
/// FIXME: remove this.
/// 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();
}
Sema::Sema(Preprocessor &pp, ASTContext &ctxt)
: PP(pp), Context(ctxt), CurFunctionDecl(0), CurMethodDecl(0) {
// 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");
if (PP.getLangOptions().ObjC1) {
// Synthesize "typedef struct objc_class *Class;"
RecordDecl *ClassTag = new RecordDecl(Decl::Struct, SourceLocation(),
&IT.get("objc_class"), 0);
QualType ClassT = Context.getPointerType(Context.getTagDeclType(ClassTag));
TypedefDecl *ClassTypedef = new TypedefDecl(SourceLocation(),
&Context.Idents.get("Class"),
ClassT, 0);
Context.setObjcClassType(ClassTypedef);
// Synthesize "typedef struct objc_object { Class isa; } *id;"
RecordDecl *ObjectTag = new RecordDecl(Decl::Struct, SourceLocation(),
&IT.get("objc_object"), 0);
FieldDecl *IsaDecl = new FieldDecl(SourceLocation(), 0,
Context.getObjcClassType());
ObjectTag->defineBody(&IsaDecl, 1);
QualType ObjT = Context.getPointerType(Context.getTagDeclType(ObjectTag));
TypedefDecl *IdTypedef = new TypedefDecl(SourceLocation(),
&Context.Idents.get("id"),
ObjT, 0);
Context.setObjcIdType(IdTypedef);
// Synthesize "typedef struct objc_selector *SEL;"
RecordDecl *SelTag = new RecordDecl(Decl::Struct, SourceLocation(),
&IT.get("objc_selector"), 0);
QualType SelT = Context.getPointerType(Context.getTagDeclType(SelTag));
TypedefDecl *SelTypedef = new TypedefDecl(SourceLocation(),
&Context.Idents.get("SEL"),
SelT, 0);
Context.setObjcSelType(SelTypedef);
}
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();
}