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//===--- Sema.cpp - AST Builder and Semantic Analysis Implementation ------===//
//
// The LLVM Compiler Infrastructure
//
// This file 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 || strcmp(typeName, "Protocol") == 0;
}
void Sema::ActOnTranslationUnitScope(SourceLocation Loc, Scope *S) {
TUScope = S;
CurContext = Context.getTranslationUnitDecl();
if (!PP.getLangOptions().ObjC1) return;
// Synthesize "typedef struct objc_selector *SEL;"
RecordDecl *SelTag = RecordDecl::Create(Context, TagDecl::TK_struct,
CurContext,
SourceLocation(),
&Context.Idents.get("objc_selector"),
0);
PushOnScopeChains(SelTag, TUScope);
QualType SelT = Context.getPointerType(Context.getTagDeclType(SelTag));
TypedefDecl *SelTypedef = TypedefDecl::Create(Context, CurContext,
SourceLocation(),
&Context.Idents.get("SEL"),
SelT, 0);
PushOnScopeChains(SelTypedef, TUScope);
Context.setObjCSelType(SelTypedef);
// FIXME: Make sure these don't leak!
RecordDecl *ClassTag = RecordDecl::Create(Context, TagDecl::TK_struct,
CurContext,
SourceLocation(),
&Context.Idents.get("objc_class"),
0);
QualType ClassT = Context.getPointerType(Context.getTagDeclType(ClassTag));
TypedefDecl *ClassTypedef =
TypedefDecl::Create(Context, CurContext, SourceLocation(),
&Context.Idents.get("Class"), ClassT, 0);
PushOnScopeChains(ClassTag, TUScope);
PushOnScopeChains(ClassTypedef, TUScope);
Context.setObjCClassType(ClassTypedef);
// Synthesize "@class Protocol;
ObjCInterfaceDecl *ProtocolDecl =
ObjCInterfaceDecl::Create(Context, SourceLocation(),
&Context.Idents.get("Protocol"),
SourceLocation(), true);
Context.setObjCProtoType(Context.getObjCInterfaceType(ProtocolDecl));
PushOnScopeChains(ProtocolDecl, TUScope);
// Synthesize "typedef struct objc_object { Class isa; } *id;"
RecordDecl *ObjectTag =
RecordDecl::Create(Context, TagDecl::TK_struct, CurContext,
SourceLocation(),
&Context.Idents.get("objc_object"), 0);
QualType ObjT = Context.getPointerType(Context.getTagDeclType(ObjectTag));
PushOnScopeChains(ObjectTag, TUScope);
TypedefDecl *IdTypedef = TypedefDecl::Create(Context, CurContext,
SourceLocation(),
&Context.Idents.get("id"),
ObjT, 0);
PushOnScopeChains(IdTypedef, TUScope);
Context.setObjCIdType(IdTypedef);
}
Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer)
: PP(pp), Context(ctxt), Consumer(consumer), CurContext(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_NSLog] = &IT.get("NSLog");
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;
if (getLangOptions().CPlusPlus)
FieldCollector.reset(new CXXFieldCollector());
}
/// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast.
/// If there is already an implicit cast, merge into the existing one.
void Sema::ImpCastExprToType(Expr *&Expr, QualType Type) {
if (Expr->getType().getCanonicalType() == Type.getCanonicalType()) return;
if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(Expr))
ImpCast->setType(Type);
else
Expr = new ImplicitCastExpr(Type, Expr);
}
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(PP.getFullLoc(Loc), DiagID);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg) {
PP.getDiagnostics().Report(PP.getFullLoc(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(PP.getFullLoc(Loc), DiagID, MsgArr, 2);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, SourceRange Range) {
PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, 0, 0, &Range,1);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg,
SourceRange Range) {
PP.getDiagnostics().Report(PP.getFullLoc(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(PP.getFullLoc(Loc), DiagID, MsgArr, 2, &Range, 1);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg1,
const std::string &Msg2, const std::string &Msg3,
SourceRange R1) {
std::string MsgArr[] = { Msg1, Msg2, Msg3 };
PP.getDiagnostics().Report(PP.getFullLoc(Loc), DiagID, MsgArr, 3, &R1, 1);
return true;
}
bool Sema::Diag(SourceLocation Loc, unsigned DiagID,
SourceRange R1, SourceRange R2) {
SourceRange RangeArr[] = { R1, R2 };
PP.getDiagnostics().Report(PP.getFullLoc(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(PP.getFullLoc(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(PP.getFullLoc(Range),DiagID, MsgArr,2,RangeArr, 2);
return true;
}
const LangOptions &Sema::getLangOptions() const {
return PP.getLangOptions();
}
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