//===--- 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; } /// isObjCObjectPointerType - Returns true if type is an Objective-C pointer /// to an object type. This includes "id" and "Class" (two 'special' pointers /// to struct), Interface* (pointer to ObjCInterfaceType) and id

(qualified /// ID type). bool Sema::isObjCObjectPointerType(QualType Ty) const { if (Ty->isObjCQualifiedIdType()) return true; if (!Ty->isPointerType()) return false; // Check to see if this is 'id' or 'Class', both of which are typedefs for // pointer types. This looks for the typedef specifically, not for the // underlying type. if (Ty == Context.getObjCIdType() || Ty == Context.getObjCClassType()) return true; // If this a pointer to an interface (e.g. NSString*), it is ok. return Ty->getAsPointerType()->getPointeeType()->isObjCInterfaceType(); } 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(Expr)) ImpCast->setType(Type); else Expr = new ImplicitCastExpr(Type, Expr); } void Sema::DeleteExpr(ExprTy *E) { delete static_cast(E); } void Sema::DeleteStmt(StmtTy *S) { delete static_cast(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(); }