forked from OSchip/llvm-project
3277 lines
128 KiB
C++
3277 lines
128 KiB
C++
//===--- SemaExprObjC.cpp - Semantic Analysis for ObjC Expressions --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements semantic analysis for Objective-C expressions.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Sema/SemaInternal.h"
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#include "clang/Sema/Lookup.h"
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#include "clang/Sema/Scope.h"
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#include "clang/Sema/ScopeInfo.h"
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#include "clang/Sema/Initialization.h"
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#include "clang/Analysis/DomainSpecific/CocoaConventions.h"
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#include "clang/Edit/Rewriters.h"
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#include "clang/Edit/Commit.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/ExprObjC.h"
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#include "clang/AST/StmtVisitor.h"
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#include "clang/AST/TypeLoc.h"
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#include "llvm/ADT/SmallString.h"
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#include "clang/Lex/Preprocessor.h"
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using namespace clang;
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using namespace sema;
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using llvm::makeArrayRef;
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ExprResult Sema::ParseObjCStringLiteral(SourceLocation *AtLocs,
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Expr **strings,
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unsigned NumStrings) {
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StringLiteral **Strings = reinterpret_cast<StringLiteral**>(strings);
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// Most ObjC strings are formed out of a single piece. However, we *can*
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// have strings formed out of multiple @ strings with multiple pptokens in
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// each one, e.g. @"foo" "bar" @"baz" "qux" which need to be turned into one
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// StringLiteral for ObjCStringLiteral to hold onto.
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StringLiteral *S = Strings[0];
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// If we have a multi-part string, merge it all together.
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if (NumStrings != 1) {
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// Concatenate objc strings.
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SmallString<128> StrBuf;
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SmallVector<SourceLocation, 8> StrLocs;
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for (unsigned i = 0; i != NumStrings; ++i) {
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S = Strings[i];
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// ObjC strings can't be wide or UTF.
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if (!S->isAscii()) {
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Diag(S->getLocStart(), diag::err_cfstring_literal_not_string_constant)
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<< S->getSourceRange();
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return true;
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}
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// Append the string.
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StrBuf += S->getString();
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// Get the locations of the string tokens.
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StrLocs.append(S->tokloc_begin(), S->tokloc_end());
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}
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// Create the aggregate string with the appropriate content and location
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// information.
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S = StringLiteral::Create(Context, StrBuf,
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StringLiteral::Ascii, /*Pascal=*/false,
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Context.getPointerType(Context.CharTy),
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&StrLocs[0], StrLocs.size());
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}
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return BuildObjCStringLiteral(AtLocs[0], S);
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}
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ExprResult Sema::BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S){
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// Verify that this composite string is acceptable for ObjC strings.
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if (CheckObjCString(S))
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return true;
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// Initialize the constant string interface lazily. This assumes
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// the NSString interface is seen in this translation unit. Note: We
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// don't use NSConstantString, since the runtime team considers this
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// interface private (even though it appears in the header files).
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QualType Ty = Context.getObjCConstantStringInterface();
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if (!Ty.isNull()) {
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Ty = Context.getObjCObjectPointerType(Ty);
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} else if (getLangOpts().NoConstantCFStrings) {
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IdentifierInfo *NSIdent=0;
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std::string StringClass(getLangOpts().ObjCConstantStringClass);
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if (StringClass.empty())
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NSIdent = &Context.Idents.get("NSConstantString");
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else
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NSIdent = &Context.Idents.get(StringClass);
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NamedDecl *IF = LookupSingleName(TUScope, NSIdent, AtLoc,
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LookupOrdinaryName);
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if (ObjCInterfaceDecl *StrIF = dyn_cast_or_null<ObjCInterfaceDecl>(IF)) {
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Context.setObjCConstantStringInterface(StrIF);
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Ty = Context.getObjCConstantStringInterface();
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Ty = Context.getObjCObjectPointerType(Ty);
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} else {
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// If there is no NSConstantString interface defined then treat this
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// as error and recover from it.
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Diag(S->getLocStart(), diag::err_no_nsconstant_string_class) << NSIdent
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<< S->getSourceRange();
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Ty = Context.getObjCIdType();
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}
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} else {
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IdentifierInfo *NSIdent = NSAPIObj->getNSClassId(NSAPI::ClassId_NSString);
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NamedDecl *IF = LookupSingleName(TUScope, NSIdent, AtLoc,
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LookupOrdinaryName);
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if (ObjCInterfaceDecl *StrIF = dyn_cast_or_null<ObjCInterfaceDecl>(IF)) {
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Context.setObjCConstantStringInterface(StrIF);
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Ty = Context.getObjCConstantStringInterface();
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Ty = Context.getObjCObjectPointerType(Ty);
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} else {
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// If there is no NSString interface defined, implicitly declare
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// a @class NSString; and use that instead. This is to make sure
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// type of an NSString literal is represented correctly, instead of
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// being an 'id' type.
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Ty = Context.getObjCNSStringType();
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if (Ty.isNull()) {
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ObjCInterfaceDecl *NSStringIDecl =
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ObjCInterfaceDecl::Create (Context,
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Context.getTranslationUnitDecl(),
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SourceLocation(), NSIdent,
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0, SourceLocation());
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Ty = Context.getObjCInterfaceType(NSStringIDecl);
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Context.setObjCNSStringType(Ty);
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}
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Ty = Context.getObjCObjectPointerType(Ty);
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}
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}
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return new (Context) ObjCStringLiteral(S, Ty, AtLoc);
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}
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/// \brief Emits an error if the given method does not exist, or if the return
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/// type is not an Objective-C object.
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static bool validateBoxingMethod(Sema &S, SourceLocation Loc,
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const ObjCInterfaceDecl *Class,
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Selector Sel, const ObjCMethodDecl *Method) {
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if (!Method) {
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// FIXME: Is there a better way to avoid quotes than using getName()?
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S.Diag(Loc, diag::err_undeclared_boxing_method) << Sel << Class->getName();
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return false;
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}
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// Make sure the return type is reasonable.
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QualType ReturnType = Method->getResultType();
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if (!ReturnType->isObjCObjectPointerType()) {
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S.Diag(Loc, diag::err_objc_literal_method_sig)
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<< Sel;
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S.Diag(Method->getLocation(), diag::note_objc_literal_method_return)
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<< ReturnType;
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return false;
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}
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return true;
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}
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/// \brief Retrieve the NSNumber factory method that should be used to create
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/// an Objective-C literal for the given type.
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static ObjCMethodDecl *getNSNumberFactoryMethod(Sema &S, SourceLocation Loc,
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QualType NumberType,
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bool isLiteral = false,
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SourceRange R = SourceRange()) {
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llvm::Optional<NSAPI::NSNumberLiteralMethodKind> Kind
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= S.NSAPIObj->getNSNumberFactoryMethodKind(NumberType);
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if (!Kind) {
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if (isLiteral) {
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S.Diag(Loc, diag::err_invalid_nsnumber_type)
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<< NumberType << R;
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}
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return 0;
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}
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// If we already looked up this method, we're done.
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if (S.NSNumberLiteralMethods[*Kind])
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return S.NSNumberLiteralMethods[*Kind];
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Selector Sel = S.NSAPIObj->getNSNumberLiteralSelector(*Kind,
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/*Instance=*/false);
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ASTContext &CX = S.Context;
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// Look up the NSNumber class, if we haven't done so already. It's cached
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// in the Sema instance.
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if (!S.NSNumberDecl) {
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IdentifierInfo *NSNumberId =
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S.NSAPIObj->getNSClassId(NSAPI::ClassId_NSNumber);
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NamedDecl *IF = S.LookupSingleName(S.TUScope, NSNumberId,
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Loc, Sema::LookupOrdinaryName);
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S.NSNumberDecl = dyn_cast_or_null<ObjCInterfaceDecl>(IF);
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if (!S.NSNumberDecl) {
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if (S.getLangOpts().DebuggerObjCLiteral) {
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// Create a stub definition of NSNumber.
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S.NSNumberDecl = ObjCInterfaceDecl::Create(CX,
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CX.getTranslationUnitDecl(),
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SourceLocation(), NSNumberId,
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0, SourceLocation());
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} else {
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// Otherwise, require a declaration of NSNumber.
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S.Diag(Loc, diag::err_undeclared_nsnumber);
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return 0;
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}
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} else if (!S.NSNumberDecl->hasDefinition()) {
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S.Diag(Loc, diag::err_undeclared_nsnumber);
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return 0;
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}
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// generate the pointer to NSNumber type.
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QualType NSNumberObject = CX.getObjCInterfaceType(S.NSNumberDecl);
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S.NSNumberPointer = CX.getObjCObjectPointerType(NSNumberObject);
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}
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// Look for the appropriate method within NSNumber.
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ObjCMethodDecl *Method = S.NSNumberDecl->lookupClassMethod(Sel);
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if (!Method && S.getLangOpts().DebuggerObjCLiteral) {
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// create a stub definition this NSNumber factory method.
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TypeSourceInfo *ResultTInfo = 0;
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Method = ObjCMethodDecl::Create(CX, SourceLocation(), SourceLocation(), Sel,
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S.NSNumberPointer, ResultTInfo,
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S.NSNumberDecl,
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/*isInstance=*/false, /*isVariadic=*/false,
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/*isSynthesized=*/false,
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/*isImplicitlyDeclared=*/true,
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/*isDefined=*/false,
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ObjCMethodDecl::Required,
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/*HasRelatedResultType=*/false);
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ParmVarDecl *value = ParmVarDecl::Create(S.Context, Method,
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SourceLocation(), SourceLocation(),
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&CX.Idents.get("value"),
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NumberType, /*TInfo=*/0, SC_None,
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SC_None, 0);
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Method->setMethodParams(S.Context, value, ArrayRef<SourceLocation>());
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}
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if (!validateBoxingMethod(S, Loc, S.NSNumberDecl, Sel, Method))
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return 0;
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// Note: if the parameter type is out-of-line, we'll catch it later in the
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// implicit conversion.
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S.NSNumberLiteralMethods[*Kind] = Method;
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return Method;
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}
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/// BuildObjCNumericLiteral - builds an ObjCBoxedExpr AST node for the
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/// numeric literal expression. Type of the expression will be "NSNumber *".
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ExprResult Sema::BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number) {
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// Determine the type of the literal.
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QualType NumberType = Number->getType();
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if (CharacterLiteral *Char = dyn_cast<CharacterLiteral>(Number)) {
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// In C, character literals have type 'int'. That's not the type we want
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// to use to determine the Objective-c literal kind.
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switch (Char->getKind()) {
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case CharacterLiteral::Ascii:
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NumberType = Context.CharTy;
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break;
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case CharacterLiteral::Wide:
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NumberType = Context.getWCharType();
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break;
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case CharacterLiteral::UTF16:
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NumberType = Context.Char16Ty;
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break;
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case CharacterLiteral::UTF32:
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NumberType = Context.Char32Ty;
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break;
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}
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}
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// Look for the appropriate method within NSNumber.
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// Construct the literal.
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SourceRange NR(Number->getSourceRange());
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ObjCMethodDecl *Method = getNSNumberFactoryMethod(*this, AtLoc, NumberType,
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true, NR);
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if (!Method)
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return ExprError();
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// Convert the number to the type that the parameter expects.
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ParmVarDecl *ParamDecl = Method->param_begin()[0];
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InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
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ParamDecl);
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ExprResult ConvertedNumber = PerformCopyInitialization(Entity,
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SourceLocation(),
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Owned(Number));
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if (ConvertedNumber.isInvalid())
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return ExprError();
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Number = ConvertedNumber.get();
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// Use the effective source range of the literal, including the leading '@'.
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return MaybeBindToTemporary(
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new (Context) ObjCBoxedExpr(Number, NSNumberPointer, Method,
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SourceRange(AtLoc, NR.getEnd())));
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}
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ExprResult Sema::ActOnObjCBoolLiteral(SourceLocation AtLoc,
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SourceLocation ValueLoc,
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bool Value) {
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ExprResult Inner;
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if (getLangOpts().CPlusPlus) {
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Inner = ActOnCXXBoolLiteral(ValueLoc, Value? tok::kw_true : tok::kw_false);
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} else {
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// C doesn't actually have a way to represent literal values of type
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// _Bool. So, we'll use 0/1 and implicit cast to _Bool.
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Inner = ActOnIntegerConstant(ValueLoc, Value? 1 : 0);
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Inner = ImpCastExprToType(Inner.get(), Context.BoolTy,
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CK_IntegralToBoolean);
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}
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return BuildObjCNumericLiteral(AtLoc, Inner.get());
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}
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/// \brief Check that the given expression is a valid element of an Objective-C
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/// collection literal.
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static ExprResult CheckObjCCollectionLiteralElement(Sema &S, Expr *Element,
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QualType T) {
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// If the expression is type-dependent, there's nothing for us to do.
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if (Element->isTypeDependent())
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return Element;
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ExprResult Result = S.CheckPlaceholderExpr(Element);
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if (Result.isInvalid())
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return ExprError();
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Element = Result.get();
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// In C++, check for an implicit conversion to an Objective-C object pointer
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// type.
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if (S.getLangOpts().CPlusPlus && Element->getType()->isRecordType()) {
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InitializedEntity Entity
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= InitializedEntity::InitializeParameter(S.Context, T,
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/*Consumed=*/false);
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InitializationKind Kind
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= InitializationKind::CreateCopy(Element->getLocStart(),
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SourceLocation());
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InitializationSequence Seq(S, Entity, Kind, &Element, 1);
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if (!Seq.Failed())
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return Seq.Perform(S, Entity, Kind, MultiExprArg(S, &Element, 1));
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}
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Expr *OrigElement = Element;
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// Perform lvalue-to-rvalue conversion.
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Result = S.DefaultLvalueConversion(Element);
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if (Result.isInvalid())
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return ExprError();
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Element = Result.get();
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// Make sure that we have an Objective-C pointer type or block.
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if (!Element->getType()->isObjCObjectPointerType() &&
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!Element->getType()->isBlockPointerType()) {
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bool Recovered = false;
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// If this is potentially an Objective-C numeric literal, add the '@'.
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if (isa<IntegerLiteral>(OrigElement) ||
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isa<CharacterLiteral>(OrigElement) ||
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isa<FloatingLiteral>(OrigElement) ||
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isa<ObjCBoolLiteralExpr>(OrigElement) ||
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isa<CXXBoolLiteralExpr>(OrigElement)) {
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if (S.NSAPIObj->getNSNumberFactoryMethodKind(OrigElement->getType())) {
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int Which = isa<CharacterLiteral>(OrigElement) ? 1
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: (isa<CXXBoolLiteralExpr>(OrigElement) ||
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isa<ObjCBoolLiteralExpr>(OrigElement)) ? 2
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: 3;
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S.Diag(OrigElement->getLocStart(), diag::err_box_literal_collection)
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<< Which << OrigElement->getSourceRange()
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<< FixItHint::CreateInsertion(OrigElement->getLocStart(), "@");
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Result = S.BuildObjCNumericLiteral(OrigElement->getLocStart(),
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OrigElement);
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if (Result.isInvalid())
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return ExprError();
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Element = Result.get();
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Recovered = true;
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}
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}
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// If this is potentially an Objective-C string literal, add the '@'.
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else if (StringLiteral *String = dyn_cast<StringLiteral>(OrigElement)) {
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if (String->isAscii()) {
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S.Diag(OrigElement->getLocStart(), diag::err_box_literal_collection)
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<< 0 << OrigElement->getSourceRange()
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<< FixItHint::CreateInsertion(OrigElement->getLocStart(), "@");
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Result = S.BuildObjCStringLiteral(OrigElement->getLocStart(), String);
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if (Result.isInvalid())
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return ExprError();
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Element = Result.get();
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Recovered = true;
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}
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}
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if (!Recovered) {
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S.Diag(Element->getLocStart(), diag::err_invalid_collection_element)
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<< Element->getType();
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return ExprError();
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}
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}
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// Make sure that the element has the type that the container factory
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// function expects.
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return S.PerformCopyInitialization(
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InitializedEntity::InitializeParameter(S.Context, T,
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/*Consumed=*/false),
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Element->getLocStart(), Element);
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}
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ExprResult Sema::BuildObjCBoxedExpr(SourceRange SR, Expr *ValueExpr) {
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if (ValueExpr->isTypeDependent()) {
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ObjCBoxedExpr *BoxedExpr =
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new (Context) ObjCBoxedExpr(ValueExpr, Context.DependentTy, NULL, SR);
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return Owned(BoxedExpr);
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}
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ObjCMethodDecl *BoxingMethod = NULL;
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QualType BoxedType;
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// Convert the expression to an RValue, so we can check for pointer types...
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ExprResult RValue = DefaultFunctionArrayLvalueConversion(ValueExpr);
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if (RValue.isInvalid()) {
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return ExprError();
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}
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ValueExpr = RValue.get();
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QualType ValueType(ValueExpr->getType());
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if (const PointerType *PT = ValueType->getAs<PointerType>()) {
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QualType PointeeType = PT->getPointeeType();
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if (Context.hasSameUnqualifiedType(PointeeType, Context.CharTy)) {
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if (!NSStringDecl) {
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IdentifierInfo *NSStringId =
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NSAPIObj->getNSClassId(NSAPI::ClassId_NSString);
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NamedDecl *Decl = LookupSingleName(TUScope, NSStringId,
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SR.getBegin(), LookupOrdinaryName);
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NSStringDecl = dyn_cast_or_null<ObjCInterfaceDecl>(Decl);
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if (!NSStringDecl) {
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if (getLangOpts().DebuggerObjCLiteral) {
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// Support boxed expressions in the debugger w/o NSString declaration.
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DeclContext *TU = Context.getTranslationUnitDecl();
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NSStringDecl = ObjCInterfaceDecl::Create(Context, TU,
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SourceLocation(),
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NSStringId,
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0, SourceLocation());
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} else {
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Diag(SR.getBegin(), diag::err_undeclared_nsstring);
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return ExprError();
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}
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} else if (!NSStringDecl->hasDefinition()) {
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Diag(SR.getBegin(), diag::err_undeclared_nsstring);
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return ExprError();
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}
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assert(NSStringDecl && "NSStringDecl should not be NULL");
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QualType NSStringObject = Context.getObjCInterfaceType(NSStringDecl);
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NSStringPointer = Context.getObjCObjectPointerType(NSStringObject);
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}
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if (!StringWithUTF8StringMethod) {
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IdentifierInfo *II = &Context.Idents.get("stringWithUTF8String");
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Selector stringWithUTF8String = Context.Selectors.getUnarySelector(II);
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// Look for the appropriate method within NSString.
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BoxingMethod = NSStringDecl->lookupClassMethod(stringWithUTF8String);
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if (!BoxingMethod && getLangOpts().DebuggerObjCLiteral) {
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// Debugger needs to work even if NSString hasn't been defined.
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TypeSourceInfo *ResultTInfo = 0;
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ObjCMethodDecl *M =
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ObjCMethodDecl::Create(Context, SourceLocation(), SourceLocation(),
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stringWithUTF8String, NSStringPointer,
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ResultTInfo, NSStringDecl,
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/*isInstance=*/false, /*isVariadic=*/false,
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/*isSynthesized=*/false,
|
|
/*isImplicitlyDeclared=*/true,
|
|
/*isDefined=*/false,
|
|
ObjCMethodDecl::Required,
|
|
/*HasRelatedResultType=*/false);
|
|
QualType ConstCharType = Context.CharTy.withConst();
|
|
ParmVarDecl *value =
|
|
ParmVarDecl::Create(Context, M,
|
|
SourceLocation(), SourceLocation(),
|
|
&Context.Idents.get("value"),
|
|
Context.getPointerType(ConstCharType),
|
|
/*TInfo=*/0,
|
|
SC_None, SC_None, 0);
|
|
M->setMethodParams(Context, value, ArrayRef<SourceLocation>());
|
|
BoxingMethod = M;
|
|
}
|
|
|
|
if (!validateBoxingMethod(*this, SR.getBegin(), NSStringDecl,
|
|
stringWithUTF8String, BoxingMethod))
|
|
return ExprError();
|
|
|
|
StringWithUTF8StringMethod = BoxingMethod;
|
|
}
|
|
|
|
BoxingMethod = StringWithUTF8StringMethod;
|
|
BoxedType = NSStringPointer;
|
|
}
|
|
} else if (ValueType->isBuiltinType()) {
|
|
// The other types we support are numeric, char and BOOL/bool. We could also
|
|
// provide limited support for structure types, such as NSRange, NSRect, and
|
|
// NSSize. See NSValue (NSValueGeometryExtensions) in <Foundation/NSGeometry.h>
|
|
// for more details.
|
|
|
|
// Check for a top-level character literal.
|
|
if (const CharacterLiteral *Char =
|
|
dyn_cast<CharacterLiteral>(ValueExpr->IgnoreParens())) {
|
|
// In C, character literals have type 'int'. That's not the type we want
|
|
// to use to determine the Objective-c literal kind.
|
|
switch (Char->getKind()) {
|
|
case CharacterLiteral::Ascii:
|
|
ValueType = Context.CharTy;
|
|
break;
|
|
|
|
case CharacterLiteral::Wide:
|
|
ValueType = Context.getWCharType();
|
|
break;
|
|
|
|
case CharacterLiteral::UTF16:
|
|
ValueType = Context.Char16Ty;
|
|
break;
|
|
|
|
case CharacterLiteral::UTF32:
|
|
ValueType = Context.Char32Ty;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// FIXME: Do I need to do anything special with BoolTy expressions?
|
|
|
|
// Look for the appropriate method within NSNumber.
|
|
BoxingMethod = getNSNumberFactoryMethod(*this, SR.getBegin(), ValueType);
|
|
BoxedType = NSNumberPointer;
|
|
|
|
} else if (const EnumType *ET = ValueType->getAs<EnumType>()) {
|
|
if (!ET->getDecl()->isComplete()) {
|
|
Diag(SR.getBegin(), diag::err_objc_incomplete_boxed_expression_type)
|
|
<< ValueType << ValueExpr->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
BoxingMethod = getNSNumberFactoryMethod(*this, SR.getBegin(),
|
|
ET->getDecl()->getIntegerType());
|
|
BoxedType = NSNumberPointer;
|
|
}
|
|
|
|
if (!BoxingMethod) {
|
|
Diag(SR.getBegin(), diag::err_objc_illegal_boxed_expression_type)
|
|
<< ValueType << ValueExpr->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
// Convert the expression to the type that the parameter requires.
|
|
ParmVarDecl *ParamDecl = BoxingMethod->param_begin()[0];
|
|
InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
|
|
ParamDecl);
|
|
ExprResult ConvertedValueExpr = PerformCopyInitialization(Entity,
|
|
SourceLocation(),
|
|
Owned(ValueExpr));
|
|
if (ConvertedValueExpr.isInvalid())
|
|
return ExprError();
|
|
ValueExpr = ConvertedValueExpr.get();
|
|
|
|
ObjCBoxedExpr *BoxedExpr =
|
|
new (Context) ObjCBoxedExpr(ValueExpr, BoxedType,
|
|
BoxingMethod, SR);
|
|
return MaybeBindToTemporary(BoxedExpr);
|
|
}
|
|
|
|
ExprResult Sema::BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr,
|
|
Expr *IndexExpr,
|
|
ObjCMethodDecl *getterMethod,
|
|
ObjCMethodDecl *setterMethod) {
|
|
// Subscripting is only supported in the non-fragile ABI.
|
|
if (LangOpts.ObjCRuntime.isFragile())
|
|
return ExprError();
|
|
|
|
// If the expression is type-dependent, there's nothing for us to do.
|
|
assert ((!BaseExpr->isTypeDependent() && !IndexExpr->isTypeDependent()) &&
|
|
"base or index cannot have dependent type here");
|
|
ExprResult Result = CheckPlaceholderExpr(IndexExpr);
|
|
if (Result.isInvalid())
|
|
return ExprError();
|
|
IndexExpr = Result.get();
|
|
|
|
// Perform lvalue-to-rvalue conversion.
|
|
Result = DefaultLvalueConversion(BaseExpr);
|
|
if (Result.isInvalid())
|
|
return ExprError();
|
|
BaseExpr = Result.get();
|
|
return Owned(ObjCSubscriptRefExpr::Create(Context,
|
|
BaseExpr,
|
|
IndexExpr,
|
|
Context.PseudoObjectTy,
|
|
getterMethod,
|
|
setterMethod, RB));
|
|
|
|
}
|
|
|
|
ExprResult Sema::BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements) {
|
|
// Look up the NSArray class, if we haven't done so already.
|
|
if (!NSArrayDecl) {
|
|
NamedDecl *IF = LookupSingleName(TUScope,
|
|
NSAPIObj->getNSClassId(NSAPI::ClassId_NSArray),
|
|
SR.getBegin(),
|
|
LookupOrdinaryName);
|
|
NSArrayDecl = dyn_cast_or_null<ObjCInterfaceDecl>(IF);
|
|
if (!NSArrayDecl && getLangOpts().DebuggerObjCLiteral)
|
|
NSArrayDecl = ObjCInterfaceDecl::Create (Context,
|
|
Context.getTranslationUnitDecl(),
|
|
SourceLocation(),
|
|
NSAPIObj->getNSClassId(NSAPI::ClassId_NSArray),
|
|
0, SourceLocation());
|
|
|
|
if (!NSArrayDecl) {
|
|
Diag(SR.getBegin(), diag::err_undeclared_nsarray);
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
// Find the arrayWithObjects:count: method, if we haven't done so already.
|
|
QualType IdT = Context.getObjCIdType();
|
|
if (!ArrayWithObjectsMethod) {
|
|
Selector
|
|
Sel = NSAPIObj->getNSArraySelector(NSAPI::NSArr_arrayWithObjectsCount);
|
|
ObjCMethodDecl *Method = NSArrayDecl->lookupClassMethod(Sel);
|
|
if (!Method && getLangOpts().DebuggerObjCLiteral) {
|
|
TypeSourceInfo *ResultTInfo = 0;
|
|
Method = ObjCMethodDecl::Create(Context,
|
|
SourceLocation(), SourceLocation(), Sel,
|
|
IdT,
|
|
ResultTInfo,
|
|
Context.getTranslationUnitDecl(),
|
|
false /*Instance*/, false/*isVariadic*/,
|
|
/*isSynthesized=*/false,
|
|
/*isImplicitlyDeclared=*/true, /*isDefined=*/false,
|
|
ObjCMethodDecl::Required,
|
|
false);
|
|
SmallVector<ParmVarDecl *, 2> Params;
|
|
ParmVarDecl *objects = ParmVarDecl::Create(Context, Method,
|
|
SourceLocation(),
|
|
SourceLocation(),
|
|
&Context.Idents.get("objects"),
|
|
Context.getPointerType(IdT),
|
|
/*TInfo=*/0, SC_None, SC_None,
|
|
0);
|
|
Params.push_back(objects);
|
|
ParmVarDecl *cnt = ParmVarDecl::Create(Context, Method,
|
|
SourceLocation(),
|
|
SourceLocation(),
|
|
&Context.Idents.get("cnt"),
|
|
Context.UnsignedLongTy,
|
|
/*TInfo=*/0, SC_None, SC_None,
|
|
0);
|
|
Params.push_back(cnt);
|
|
Method->setMethodParams(Context, Params, ArrayRef<SourceLocation>());
|
|
}
|
|
|
|
if (!validateBoxingMethod(*this, SR.getBegin(), NSArrayDecl, Sel, Method))
|
|
return ExprError();
|
|
|
|
// Dig out the type that all elements should be converted to.
|
|
QualType T = Method->param_begin()[0]->getType();
|
|
const PointerType *PtrT = T->getAs<PointerType>();
|
|
if (!PtrT ||
|
|
!Context.hasSameUnqualifiedType(PtrT->getPointeeType(), IdT)) {
|
|
Diag(SR.getBegin(), diag::err_objc_literal_method_sig)
|
|
<< Sel;
|
|
Diag(Method->param_begin()[0]->getLocation(),
|
|
diag::note_objc_literal_method_param)
|
|
<< 0 << T
|
|
<< Context.getPointerType(IdT.withConst());
|
|
return ExprError();
|
|
}
|
|
|
|
// Check that the 'count' parameter is integral.
|
|
if (!Method->param_begin()[1]->getType()->isIntegerType()) {
|
|
Diag(SR.getBegin(), diag::err_objc_literal_method_sig)
|
|
<< Sel;
|
|
Diag(Method->param_begin()[1]->getLocation(),
|
|
diag::note_objc_literal_method_param)
|
|
<< 1
|
|
<< Method->param_begin()[1]->getType()
|
|
<< "integral";
|
|
return ExprError();
|
|
}
|
|
|
|
// We've found a good +arrayWithObjects:count: method. Save it!
|
|
ArrayWithObjectsMethod = Method;
|
|
}
|
|
|
|
QualType ObjectsType = ArrayWithObjectsMethod->param_begin()[0]->getType();
|
|
QualType RequiredType = ObjectsType->castAs<PointerType>()->getPointeeType();
|
|
|
|
// Check that each of the elements provided is valid in a collection literal,
|
|
// performing conversions as necessary.
|
|
Expr **ElementsBuffer = Elements.get();
|
|
for (unsigned I = 0, N = Elements.size(); I != N; ++I) {
|
|
ExprResult Converted = CheckObjCCollectionLiteralElement(*this,
|
|
ElementsBuffer[I],
|
|
RequiredType);
|
|
if (Converted.isInvalid())
|
|
return ExprError();
|
|
|
|
ElementsBuffer[I] = Converted.get();
|
|
}
|
|
|
|
QualType Ty
|
|
= Context.getObjCObjectPointerType(
|
|
Context.getObjCInterfaceType(NSArrayDecl));
|
|
|
|
return MaybeBindToTemporary(
|
|
ObjCArrayLiteral::Create(Context,
|
|
llvm::makeArrayRef(Elements.get(),
|
|
Elements.size()),
|
|
Ty, ArrayWithObjectsMethod, SR));
|
|
}
|
|
|
|
ExprResult Sema::BuildObjCDictionaryLiteral(SourceRange SR,
|
|
ObjCDictionaryElement *Elements,
|
|
unsigned NumElements) {
|
|
// Look up the NSDictionary class, if we haven't done so already.
|
|
if (!NSDictionaryDecl) {
|
|
NamedDecl *IF = LookupSingleName(TUScope,
|
|
NSAPIObj->getNSClassId(NSAPI::ClassId_NSDictionary),
|
|
SR.getBegin(), LookupOrdinaryName);
|
|
NSDictionaryDecl = dyn_cast_or_null<ObjCInterfaceDecl>(IF);
|
|
if (!NSDictionaryDecl && getLangOpts().DebuggerObjCLiteral)
|
|
NSDictionaryDecl = ObjCInterfaceDecl::Create (Context,
|
|
Context.getTranslationUnitDecl(),
|
|
SourceLocation(),
|
|
NSAPIObj->getNSClassId(NSAPI::ClassId_NSDictionary),
|
|
0, SourceLocation());
|
|
|
|
if (!NSDictionaryDecl) {
|
|
Diag(SR.getBegin(), diag::err_undeclared_nsdictionary);
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
// Find the dictionaryWithObjects:forKeys:count: method, if we haven't done
|
|
// so already.
|
|
QualType IdT = Context.getObjCIdType();
|
|
if (!DictionaryWithObjectsMethod) {
|
|
Selector Sel = NSAPIObj->getNSDictionarySelector(
|
|
NSAPI::NSDict_dictionaryWithObjectsForKeysCount);
|
|
ObjCMethodDecl *Method = NSDictionaryDecl->lookupClassMethod(Sel);
|
|
if (!Method && getLangOpts().DebuggerObjCLiteral) {
|
|
Method = ObjCMethodDecl::Create(Context,
|
|
SourceLocation(), SourceLocation(), Sel,
|
|
IdT,
|
|
0 /*TypeSourceInfo */,
|
|
Context.getTranslationUnitDecl(),
|
|
false /*Instance*/, false/*isVariadic*/,
|
|
/*isSynthesized=*/false,
|
|
/*isImplicitlyDeclared=*/true, /*isDefined=*/false,
|
|
ObjCMethodDecl::Required,
|
|
false);
|
|
SmallVector<ParmVarDecl *, 3> Params;
|
|
ParmVarDecl *objects = ParmVarDecl::Create(Context, Method,
|
|
SourceLocation(),
|
|
SourceLocation(),
|
|
&Context.Idents.get("objects"),
|
|
Context.getPointerType(IdT),
|
|
/*TInfo=*/0, SC_None, SC_None,
|
|
0);
|
|
Params.push_back(objects);
|
|
ParmVarDecl *keys = ParmVarDecl::Create(Context, Method,
|
|
SourceLocation(),
|
|
SourceLocation(),
|
|
&Context.Idents.get("keys"),
|
|
Context.getPointerType(IdT),
|
|
/*TInfo=*/0, SC_None, SC_None,
|
|
0);
|
|
Params.push_back(keys);
|
|
ParmVarDecl *cnt = ParmVarDecl::Create(Context, Method,
|
|
SourceLocation(),
|
|
SourceLocation(),
|
|
&Context.Idents.get("cnt"),
|
|
Context.UnsignedLongTy,
|
|
/*TInfo=*/0, SC_None, SC_None,
|
|
0);
|
|
Params.push_back(cnt);
|
|
Method->setMethodParams(Context, Params, ArrayRef<SourceLocation>());
|
|
}
|
|
|
|
if (!validateBoxingMethod(*this, SR.getBegin(), NSDictionaryDecl, Sel,
|
|
Method))
|
|
return ExprError();
|
|
|
|
// Dig out the type that all values should be converted to.
|
|
QualType ValueT = Method->param_begin()[0]->getType();
|
|
const PointerType *PtrValue = ValueT->getAs<PointerType>();
|
|
if (!PtrValue ||
|
|
!Context.hasSameUnqualifiedType(PtrValue->getPointeeType(), IdT)) {
|
|
Diag(SR.getBegin(), diag::err_objc_literal_method_sig)
|
|
<< Sel;
|
|
Diag(Method->param_begin()[0]->getLocation(),
|
|
diag::note_objc_literal_method_param)
|
|
<< 0 << ValueT
|
|
<< Context.getPointerType(IdT.withConst());
|
|
return ExprError();
|
|
}
|
|
|
|
// Dig out the type that all keys should be converted to.
|
|
QualType KeyT = Method->param_begin()[1]->getType();
|
|
const PointerType *PtrKey = KeyT->getAs<PointerType>();
|
|
if (!PtrKey ||
|
|
!Context.hasSameUnqualifiedType(PtrKey->getPointeeType(),
|
|
IdT)) {
|
|
bool err = true;
|
|
if (PtrKey) {
|
|
if (QIDNSCopying.isNull()) {
|
|
// key argument of selector is id<NSCopying>?
|
|
if (ObjCProtocolDecl *NSCopyingPDecl =
|
|
LookupProtocol(&Context.Idents.get("NSCopying"), SR.getBegin())) {
|
|
ObjCProtocolDecl *PQ[] = {NSCopyingPDecl};
|
|
QIDNSCopying =
|
|
Context.getObjCObjectType(Context.ObjCBuiltinIdTy,
|
|
(ObjCProtocolDecl**) PQ,1);
|
|
QIDNSCopying = Context.getObjCObjectPointerType(QIDNSCopying);
|
|
}
|
|
}
|
|
if (!QIDNSCopying.isNull())
|
|
err = !Context.hasSameUnqualifiedType(PtrKey->getPointeeType(),
|
|
QIDNSCopying);
|
|
}
|
|
|
|
if (err) {
|
|
Diag(SR.getBegin(), diag::err_objc_literal_method_sig)
|
|
<< Sel;
|
|
Diag(Method->param_begin()[1]->getLocation(),
|
|
diag::note_objc_literal_method_param)
|
|
<< 1 << KeyT
|
|
<< Context.getPointerType(IdT.withConst());
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
// Check that the 'count' parameter is integral.
|
|
QualType CountType = Method->param_begin()[2]->getType();
|
|
if (!CountType->isIntegerType()) {
|
|
Diag(SR.getBegin(), diag::err_objc_literal_method_sig)
|
|
<< Sel;
|
|
Diag(Method->param_begin()[2]->getLocation(),
|
|
diag::note_objc_literal_method_param)
|
|
<< 2 << CountType
|
|
<< "integral";
|
|
return ExprError();
|
|
}
|
|
|
|
// We've found a good +dictionaryWithObjects:keys:count: method; save it!
|
|
DictionaryWithObjectsMethod = Method;
|
|
}
|
|
|
|
QualType ValuesT = DictionaryWithObjectsMethod->param_begin()[0]->getType();
|
|
QualType ValueT = ValuesT->castAs<PointerType>()->getPointeeType();
|
|
QualType KeysT = DictionaryWithObjectsMethod->param_begin()[1]->getType();
|
|
QualType KeyT = KeysT->castAs<PointerType>()->getPointeeType();
|
|
|
|
// Check that each of the keys and values provided is valid in a collection
|
|
// literal, performing conversions as necessary.
|
|
bool HasPackExpansions = false;
|
|
for (unsigned I = 0, N = NumElements; I != N; ++I) {
|
|
// Check the key.
|
|
ExprResult Key = CheckObjCCollectionLiteralElement(*this, Elements[I].Key,
|
|
KeyT);
|
|
if (Key.isInvalid())
|
|
return ExprError();
|
|
|
|
// Check the value.
|
|
ExprResult Value
|
|
= CheckObjCCollectionLiteralElement(*this, Elements[I].Value, ValueT);
|
|
if (Value.isInvalid())
|
|
return ExprError();
|
|
|
|
Elements[I].Key = Key.get();
|
|
Elements[I].Value = Value.get();
|
|
|
|
if (Elements[I].EllipsisLoc.isInvalid())
|
|
continue;
|
|
|
|
if (!Elements[I].Key->containsUnexpandedParameterPack() &&
|
|
!Elements[I].Value->containsUnexpandedParameterPack()) {
|
|
Diag(Elements[I].EllipsisLoc,
|
|
diag::err_pack_expansion_without_parameter_packs)
|
|
<< SourceRange(Elements[I].Key->getLocStart(),
|
|
Elements[I].Value->getLocEnd());
|
|
return ExprError();
|
|
}
|
|
|
|
HasPackExpansions = true;
|
|
}
|
|
|
|
|
|
QualType Ty
|
|
= Context.getObjCObjectPointerType(
|
|
Context.getObjCInterfaceType(NSDictionaryDecl));
|
|
return MaybeBindToTemporary(
|
|
ObjCDictionaryLiteral::Create(Context,
|
|
llvm::makeArrayRef(Elements,
|
|
NumElements),
|
|
HasPackExpansions,
|
|
Ty,
|
|
DictionaryWithObjectsMethod, SR));
|
|
}
|
|
|
|
ExprResult Sema::BuildObjCEncodeExpression(SourceLocation AtLoc,
|
|
TypeSourceInfo *EncodedTypeInfo,
|
|
SourceLocation RParenLoc) {
|
|
QualType EncodedType = EncodedTypeInfo->getType();
|
|
QualType StrTy;
|
|
if (EncodedType->isDependentType())
|
|
StrTy = Context.DependentTy;
|
|
else {
|
|
if (!EncodedType->getAsArrayTypeUnsafe() && //// Incomplete array is handled.
|
|
!EncodedType->isVoidType()) // void is handled too.
|
|
if (RequireCompleteType(AtLoc, EncodedType,
|
|
diag::err_incomplete_type_objc_at_encode,
|
|
EncodedTypeInfo->getTypeLoc()))
|
|
return ExprError();
|
|
|
|
std::string Str;
|
|
Context.getObjCEncodingForType(EncodedType, Str);
|
|
|
|
// The type of @encode is the same as the type of the corresponding string,
|
|
// which is an array type.
|
|
StrTy = Context.CharTy;
|
|
// A C++ string literal has a const-qualified element type (C++ 2.13.4p1).
|
|
if (getLangOpts().CPlusPlus || getLangOpts().ConstStrings)
|
|
StrTy.addConst();
|
|
StrTy = Context.getConstantArrayType(StrTy, llvm::APInt(32, Str.size()+1),
|
|
ArrayType::Normal, 0);
|
|
}
|
|
|
|
return new (Context) ObjCEncodeExpr(StrTy, EncodedTypeInfo, AtLoc, RParenLoc);
|
|
}
|
|
|
|
ExprResult Sema::ParseObjCEncodeExpression(SourceLocation AtLoc,
|
|
SourceLocation EncodeLoc,
|
|
SourceLocation LParenLoc,
|
|
ParsedType ty,
|
|
SourceLocation RParenLoc) {
|
|
// FIXME: Preserve type source info ?
|
|
TypeSourceInfo *TInfo;
|
|
QualType EncodedType = GetTypeFromParser(ty, &TInfo);
|
|
if (!TInfo)
|
|
TInfo = Context.getTrivialTypeSourceInfo(EncodedType,
|
|
PP.getLocForEndOfToken(LParenLoc));
|
|
|
|
return BuildObjCEncodeExpression(AtLoc, TInfo, RParenLoc);
|
|
}
|
|
|
|
ExprResult Sema::ParseObjCSelectorExpression(Selector Sel,
|
|
SourceLocation AtLoc,
|
|
SourceLocation SelLoc,
|
|
SourceLocation LParenLoc,
|
|
SourceLocation RParenLoc) {
|
|
ObjCMethodDecl *Method = LookupInstanceMethodInGlobalPool(Sel,
|
|
SourceRange(LParenLoc, RParenLoc), false, false);
|
|
if (!Method)
|
|
Method = LookupFactoryMethodInGlobalPool(Sel,
|
|
SourceRange(LParenLoc, RParenLoc));
|
|
if (!Method)
|
|
Diag(SelLoc, diag::warn_undeclared_selector) << Sel;
|
|
|
|
if (!Method ||
|
|
Method->getImplementationControl() != ObjCMethodDecl::Optional) {
|
|
llvm::DenseMap<Selector, SourceLocation>::iterator Pos
|
|
= ReferencedSelectors.find(Sel);
|
|
if (Pos == ReferencedSelectors.end())
|
|
ReferencedSelectors.insert(std::make_pair(Sel, SelLoc));
|
|
}
|
|
|
|
// In ARC, forbid the user from using @selector for
|
|
// retain/release/autorelease/dealloc/retainCount.
|
|
if (getLangOpts().ObjCAutoRefCount) {
|
|
switch (Sel.getMethodFamily()) {
|
|
case OMF_retain:
|
|
case OMF_release:
|
|
case OMF_autorelease:
|
|
case OMF_retainCount:
|
|
case OMF_dealloc:
|
|
Diag(AtLoc, diag::err_arc_illegal_selector) <<
|
|
Sel << SourceRange(LParenLoc, RParenLoc);
|
|
break;
|
|
|
|
case OMF_None:
|
|
case OMF_alloc:
|
|
case OMF_copy:
|
|
case OMF_finalize:
|
|
case OMF_init:
|
|
case OMF_mutableCopy:
|
|
case OMF_new:
|
|
case OMF_self:
|
|
case OMF_performSelector:
|
|
break;
|
|
}
|
|
}
|
|
QualType Ty = Context.getObjCSelType();
|
|
return new (Context) ObjCSelectorExpr(Ty, Sel, AtLoc, RParenLoc);
|
|
}
|
|
|
|
ExprResult Sema::ParseObjCProtocolExpression(IdentifierInfo *ProtocolId,
|
|
SourceLocation AtLoc,
|
|
SourceLocation ProtoLoc,
|
|
SourceLocation LParenLoc,
|
|
SourceLocation ProtoIdLoc,
|
|
SourceLocation RParenLoc) {
|
|
ObjCProtocolDecl* PDecl = LookupProtocol(ProtocolId, ProtoIdLoc);
|
|
if (!PDecl) {
|
|
Diag(ProtoLoc, diag::err_undeclared_protocol) << ProtocolId;
|
|
return true;
|
|
}
|
|
|
|
QualType Ty = Context.getObjCProtoType();
|
|
if (Ty.isNull())
|
|
return true;
|
|
Ty = Context.getObjCObjectPointerType(Ty);
|
|
return new (Context) ObjCProtocolExpr(Ty, PDecl, AtLoc, ProtoIdLoc, RParenLoc);
|
|
}
|
|
|
|
/// Try to capture an implicit reference to 'self'.
|
|
ObjCMethodDecl *Sema::tryCaptureObjCSelf(SourceLocation Loc) {
|
|
DeclContext *DC = getFunctionLevelDeclContext();
|
|
|
|
// If we're not in an ObjC method, error out. Note that, unlike the
|
|
// C++ case, we don't require an instance method --- class methods
|
|
// still have a 'self', and we really do still need to capture it!
|
|
ObjCMethodDecl *method = dyn_cast<ObjCMethodDecl>(DC);
|
|
if (!method)
|
|
return 0;
|
|
|
|
tryCaptureVariable(method->getSelfDecl(), Loc);
|
|
|
|
return method;
|
|
}
|
|
|
|
static QualType stripObjCInstanceType(ASTContext &Context, QualType T) {
|
|
if (T == Context.getObjCInstanceType())
|
|
return Context.getObjCIdType();
|
|
|
|
return T;
|
|
}
|
|
|
|
QualType Sema::getMessageSendResultType(QualType ReceiverType,
|
|
ObjCMethodDecl *Method,
|
|
bool isClassMessage, bool isSuperMessage) {
|
|
assert(Method && "Must have a method");
|
|
if (!Method->hasRelatedResultType())
|
|
return Method->getSendResultType();
|
|
|
|
// If a method has a related return type:
|
|
// - if the method found is an instance method, but the message send
|
|
// was a class message send, T is the declared return type of the method
|
|
// found
|
|
if (Method->isInstanceMethod() && isClassMessage)
|
|
return stripObjCInstanceType(Context, Method->getSendResultType());
|
|
|
|
// - if the receiver is super, T is a pointer to the class of the
|
|
// enclosing method definition
|
|
if (isSuperMessage) {
|
|
if (ObjCMethodDecl *CurMethod = getCurMethodDecl())
|
|
if (ObjCInterfaceDecl *Class = CurMethod->getClassInterface())
|
|
return Context.getObjCObjectPointerType(
|
|
Context.getObjCInterfaceType(Class));
|
|
}
|
|
|
|
// - if the receiver is the name of a class U, T is a pointer to U
|
|
if (ReceiverType->getAs<ObjCInterfaceType>() ||
|
|
ReceiverType->isObjCQualifiedInterfaceType())
|
|
return Context.getObjCObjectPointerType(ReceiverType);
|
|
// - if the receiver is of type Class or qualified Class type,
|
|
// T is the declared return type of the method.
|
|
if (ReceiverType->isObjCClassType() ||
|
|
ReceiverType->isObjCQualifiedClassType())
|
|
return stripObjCInstanceType(Context, Method->getSendResultType());
|
|
|
|
// - if the receiver is id, qualified id, Class, or qualified Class, T
|
|
// is the receiver type, otherwise
|
|
// - T is the type of the receiver expression.
|
|
return ReceiverType;
|
|
}
|
|
|
|
void Sema::EmitRelatedResultTypeNote(const Expr *E) {
|
|
E = E->IgnoreParenImpCasts();
|
|
const ObjCMessageExpr *MsgSend = dyn_cast<ObjCMessageExpr>(E);
|
|
if (!MsgSend)
|
|
return;
|
|
|
|
const ObjCMethodDecl *Method = MsgSend->getMethodDecl();
|
|
if (!Method)
|
|
return;
|
|
|
|
if (!Method->hasRelatedResultType())
|
|
return;
|
|
|
|
if (Context.hasSameUnqualifiedType(Method->getResultType()
|
|
.getNonReferenceType(),
|
|
MsgSend->getType()))
|
|
return;
|
|
|
|
if (!Context.hasSameUnqualifiedType(Method->getResultType(),
|
|
Context.getObjCInstanceType()))
|
|
return;
|
|
|
|
Diag(Method->getLocation(), diag::note_related_result_type_inferred)
|
|
<< Method->isInstanceMethod() << Method->getSelector()
|
|
<< MsgSend->getType();
|
|
}
|
|
|
|
bool Sema::CheckMessageArgumentTypes(QualType ReceiverType,
|
|
Expr **Args, unsigned NumArgs,
|
|
Selector Sel, ObjCMethodDecl *Method,
|
|
bool isClassMessage, bool isSuperMessage,
|
|
SourceLocation lbrac, SourceLocation rbrac,
|
|
QualType &ReturnType, ExprValueKind &VK) {
|
|
if (!Method) {
|
|
// Apply default argument promotion as for (C99 6.5.2.2p6).
|
|
for (unsigned i = 0; i != NumArgs; i++) {
|
|
if (Args[i]->isTypeDependent())
|
|
continue;
|
|
|
|
ExprResult Result = DefaultArgumentPromotion(Args[i]);
|
|
if (Result.isInvalid())
|
|
return true;
|
|
Args[i] = Result.take();
|
|
}
|
|
|
|
unsigned DiagID;
|
|
if (getLangOpts().ObjCAutoRefCount)
|
|
DiagID = diag::err_arc_method_not_found;
|
|
else
|
|
DiagID = isClassMessage ? diag::warn_class_method_not_found
|
|
: diag::warn_inst_method_not_found;
|
|
if (!getLangOpts().DebuggerSupport)
|
|
Diag(lbrac, DiagID)
|
|
<< Sel << isClassMessage << SourceRange(lbrac, rbrac);
|
|
|
|
// In debuggers, we want to use __unknown_anytype for these
|
|
// results so that clients can cast them.
|
|
if (getLangOpts().DebuggerSupport) {
|
|
ReturnType = Context.UnknownAnyTy;
|
|
} else {
|
|
ReturnType = Context.getObjCIdType();
|
|
}
|
|
VK = VK_RValue;
|
|
return false;
|
|
}
|
|
|
|
ReturnType = getMessageSendResultType(ReceiverType, Method, isClassMessage,
|
|
isSuperMessage);
|
|
VK = Expr::getValueKindForType(Method->getResultType());
|
|
|
|
unsigned NumNamedArgs = Sel.getNumArgs();
|
|
// Method might have more arguments than selector indicates. This is due
|
|
// to addition of c-style arguments in method.
|
|
if (Method->param_size() > Sel.getNumArgs())
|
|
NumNamedArgs = Method->param_size();
|
|
// FIXME. This need be cleaned up.
|
|
if (NumArgs < NumNamedArgs) {
|
|
Diag(lbrac, diag::err_typecheck_call_too_few_args)
|
|
<< 2 << NumNamedArgs << NumArgs;
|
|
return false;
|
|
}
|
|
|
|
bool IsError = false;
|
|
for (unsigned i = 0; i < NumNamedArgs; i++) {
|
|
// We can't do any type-checking on a type-dependent argument.
|
|
if (Args[i]->isTypeDependent())
|
|
continue;
|
|
|
|
Expr *argExpr = Args[i];
|
|
|
|
ParmVarDecl *param = Method->param_begin()[i];
|
|
assert(argExpr && "CheckMessageArgumentTypes(): missing expression");
|
|
|
|
// Strip the unbridged-cast placeholder expression off unless it's
|
|
// a consumed argument.
|
|
if (argExpr->hasPlaceholderType(BuiltinType::ARCUnbridgedCast) &&
|
|
!param->hasAttr<CFConsumedAttr>())
|
|
argExpr = stripARCUnbridgedCast(argExpr);
|
|
|
|
if (RequireCompleteType(argExpr->getSourceRange().getBegin(),
|
|
param->getType(),
|
|
diag::err_call_incomplete_argument, argExpr))
|
|
return true;
|
|
|
|
InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
|
|
param);
|
|
ExprResult ArgE = PerformCopyInitialization(Entity, lbrac, Owned(argExpr));
|
|
if (ArgE.isInvalid())
|
|
IsError = true;
|
|
else
|
|
Args[i] = ArgE.takeAs<Expr>();
|
|
}
|
|
|
|
// Promote additional arguments to variadic methods.
|
|
if (Method->isVariadic()) {
|
|
for (unsigned i = NumNamedArgs; i < NumArgs; ++i) {
|
|
if (Args[i]->isTypeDependent())
|
|
continue;
|
|
|
|
ExprResult Arg = DefaultVariadicArgumentPromotion(Args[i], VariadicMethod,
|
|
0);
|
|
IsError |= Arg.isInvalid();
|
|
Args[i] = Arg.take();
|
|
}
|
|
} else {
|
|
// Check for extra arguments to non-variadic methods.
|
|
if (NumArgs != NumNamedArgs) {
|
|
Diag(Args[NumNamedArgs]->getLocStart(),
|
|
diag::err_typecheck_call_too_many_args)
|
|
<< 2 /*method*/ << NumNamedArgs << NumArgs
|
|
<< Method->getSourceRange()
|
|
<< SourceRange(Args[NumNamedArgs]->getLocStart(),
|
|
Args[NumArgs-1]->getLocEnd());
|
|
}
|
|
}
|
|
|
|
DiagnoseSentinelCalls(Method, lbrac, Args, NumArgs);
|
|
|
|
// Do additional checkings on method.
|
|
IsError |= CheckObjCMethodCall(Method, lbrac, Args, NumArgs);
|
|
|
|
return IsError;
|
|
}
|
|
|
|
bool Sema::isSelfExpr(Expr *receiver) {
|
|
// 'self' is objc 'self' in an objc method only.
|
|
ObjCMethodDecl *method =
|
|
dyn_cast<ObjCMethodDecl>(CurContext->getNonClosureAncestor());
|
|
if (!method) return false;
|
|
|
|
receiver = receiver->IgnoreParenLValueCasts();
|
|
if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(receiver))
|
|
if (DRE->getDecl() == method->getSelfDecl())
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// Helper method for ActOnClassMethod/ActOnInstanceMethod.
|
|
// Will search "local" class/category implementations for a method decl.
|
|
// If failed, then we search in class's root for an instance method.
|
|
// Returns 0 if no method is found.
|
|
ObjCMethodDecl *Sema::LookupPrivateClassMethod(Selector Sel,
|
|
ObjCInterfaceDecl *ClassDecl) {
|
|
ObjCMethodDecl *Method = 0;
|
|
// lookup in class and all superclasses
|
|
while (ClassDecl && !Method) {
|
|
if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
|
|
Method = ImpDecl->getClassMethod(Sel);
|
|
|
|
// Look through local category implementations associated with the class.
|
|
if (!Method)
|
|
Method = ClassDecl->getCategoryClassMethod(Sel);
|
|
|
|
// Before we give up, check if the selector is an instance method.
|
|
// But only in the root. This matches gcc's behaviour and what the
|
|
// runtime expects.
|
|
if (!Method && !ClassDecl->getSuperClass()) {
|
|
Method = ClassDecl->lookupInstanceMethod(Sel);
|
|
// Look through local category implementations associated
|
|
// with the root class.
|
|
if (!Method)
|
|
Method = LookupPrivateInstanceMethod(Sel, ClassDecl);
|
|
}
|
|
|
|
ClassDecl = ClassDecl->getSuperClass();
|
|
}
|
|
return Method;
|
|
}
|
|
|
|
ObjCMethodDecl *Sema::LookupPrivateInstanceMethod(Selector Sel,
|
|
ObjCInterfaceDecl *ClassDecl) {
|
|
if (!ClassDecl->hasDefinition())
|
|
return 0;
|
|
|
|
ObjCMethodDecl *Method = 0;
|
|
while (ClassDecl && !Method) {
|
|
// If we have implementations in scope, check "private" methods.
|
|
if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
|
|
Method = ImpDecl->getInstanceMethod(Sel);
|
|
|
|
// Look through local category implementations associated with the class.
|
|
if (!Method)
|
|
Method = ClassDecl->getCategoryInstanceMethod(Sel);
|
|
ClassDecl = ClassDecl->getSuperClass();
|
|
}
|
|
return Method;
|
|
}
|
|
|
|
/// LookupMethodInType - Look up a method in an ObjCObjectType.
|
|
ObjCMethodDecl *Sema::LookupMethodInObjectType(Selector sel, QualType type,
|
|
bool isInstance) {
|
|
const ObjCObjectType *objType = type->castAs<ObjCObjectType>();
|
|
if (ObjCInterfaceDecl *iface = objType->getInterface()) {
|
|
// Look it up in the main interface (and categories, etc.)
|
|
if (ObjCMethodDecl *method = iface->lookupMethod(sel, isInstance))
|
|
return method;
|
|
|
|
// Okay, look for "private" methods declared in any
|
|
// @implementations we've seen.
|
|
if (isInstance) {
|
|
if (ObjCMethodDecl *method = LookupPrivateInstanceMethod(sel, iface))
|
|
return method;
|
|
} else {
|
|
if (ObjCMethodDecl *method = LookupPrivateClassMethod(sel, iface))
|
|
return method;
|
|
}
|
|
}
|
|
|
|
// Check qualifiers.
|
|
for (ObjCObjectType::qual_iterator
|
|
i = objType->qual_begin(), e = objType->qual_end(); i != e; ++i)
|
|
if (ObjCMethodDecl *method = (*i)->lookupMethod(sel, isInstance))
|
|
return method;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// LookupMethodInQualifiedType - Lookups up a method in protocol qualifier
|
|
/// list of a qualified objective pointer type.
|
|
ObjCMethodDecl *Sema::LookupMethodInQualifiedType(Selector Sel,
|
|
const ObjCObjectPointerType *OPT,
|
|
bool Instance)
|
|
{
|
|
ObjCMethodDecl *MD = 0;
|
|
for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(),
|
|
E = OPT->qual_end(); I != E; ++I) {
|
|
ObjCProtocolDecl *PROTO = (*I);
|
|
if ((MD = PROTO->lookupMethod(Sel, Instance))) {
|
|
return MD;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void DiagnoseARCUseOfWeakReceiver(Sema &S, Expr *Receiver) {
|
|
if (!Receiver)
|
|
return;
|
|
|
|
if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Receiver))
|
|
Receiver = OVE->getSourceExpr();
|
|
|
|
Expr *RExpr = Receiver->IgnoreParenImpCasts();
|
|
SourceLocation Loc = RExpr->getLocStart();
|
|
QualType T = RExpr->getType();
|
|
ObjCPropertyDecl *PDecl = 0;
|
|
ObjCMethodDecl *GDecl = 0;
|
|
if (PseudoObjectExpr *POE = dyn_cast<PseudoObjectExpr>(RExpr)) {
|
|
RExpr = POE->getSyntacticForm();
|
|
if (ObjCPropertyRefExpr *PRE = dyn_cast<ObjCPropertyRefExpr>(RExpr)) {
|
|
if (PRE->isImplicitProperty()) {
|
|
GDecl = PRE->getImplicitPropertyGetter();
|
|
if (GDecl) {
|
|
T = GDecl->getResultType();
|
|
}
|
|
}
|
|
else {
|
|
PDecl = PRE->getExplicitProperty();
|
|
if (PDecl) {
|
|
T = PDecl->getType();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(RExpr)) {
|
|
// See if receiver is a method which envokes a synthesized getter
|
|
// backing a 'weak' property.
|
|
ObjCMethodDecl *Method = ME->getMethodDecl();
|
|
if (Method && Method->isSynthesized()) {
|
|
Selector Sel = Method->getSelector();
|
|
if (Sel.getNumArgs() == 0) {
|
|
const DeclContext *Container = Method->getDeclContext();
|
|
PDecl =
|
|
S.LookupPropertyDecl(cast<ObjCContainerDecl>(Container),
|
|
Sel.getIdentifierInfoForSlot(0));
|
|
}
|
|
if (PDecl)
|
|
T = PDecl->getType();
|
|
}
|
|
}
|
|
|
|
if (T.getObjCLifetime() == Qualifiers::OCL_Weak) {
|
|
S.Diag(Loc, diag::warn_receiver_is_weak)
|
|
<< ((!PDecl && !GDecl) ? 0 : (PDecl ? 1 : 2));
|
|
if (PDecl)
|
|
S.Diag(PDecl->getLocation(), diag::note_property_declare);
|
|
else if (GDecl)
|
|
S.Diag(GDecl->getLocation(), diag::note_method_declared_at) << GDecl;
|
|
return;
|
|
}
|
|
|
|
if (PDecl &&
|
|
(PDecl->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_weak)) {
|
|
S.Diag(Loc, diag::warn_receiver_is_weak) << 1;
|
|
S.Diag(PDecl->getLocation(), diag::note_property_declare);
|
|
}
|
|
}
|
|
|
|
/// HandleExprPropertyRefExpr - Handle foo.bar where foo is a pointer to an
|
|
/// objective C interface. This is a property reference expression.
|
|
ExprResult Sema::
|
|
HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT,
|
|
Expr *BaseExpr, SourceLocation OpLoc,
|
|
DeclarationName MemberName,
|
|
SourceLocation MemberLoc,
|
|
SourceLocation SuperLoc, QualType SuperType,
|
|
bool Super) {
|
|
const ObjCInterfaceType *IFaceT = OPT->getInterfaceType();
|
|
ObjCInterfaceDecl *IFace = IFaceT->getDecl();
|
|
|
|
if (!MemberName.isIdentifier()) {
|
|
Diag(MemberLoc, diag::err_invalid_property_name)
|
|
<< MemberName << QualType(OPT, 0);
|
|
return ExprError();
|
|
}
|
|
|
|
IdentifierInfo *Member = MemberName.getAsIdentifierInfo();
|
|
|
|
SourceRange BaseRange = Super? SourceRange(SuperLoc)
|
|
: BaseExpr->getSourceRange();
|
|
if (RequireCompleteType(MemberLoc, OPT->getPointeeType(),
|
|
diag::err_property_not_found_forward_class,
|
|
MemberName, BaseRange))
|
|
return ExprError();
|
|
|
|
// Search for a declared property first.
|
|
if (ObjCPropertyDecl *PD = IFace->FindPropertyDeclaration(Member)) {
|
|
// Check whether we can reference this property.
|
|
if (DiagnoseUseOfDecl(PD, MemberLoc))
|
|
return ExprError();
|
|
if (Super)
|
|
return Owned(new (Context) ObjCPropertyRefExpr(PD, Context.PseudoObjectTy,
|
|
VK_LValue, OK_ObjCProperty,
|
|
MemberLoc,
|
|
SuperLoc, SuperType));
|
|
else
|
|
return Owned(new (Context) ObjCPropertyRefExpr(PD, Context.PseudoObjectTy,
|
|
VK_LValue, OK_ObjCProperty,
|
|
MemberLoc, BaseExpr));
|
|
}
|
|
// Check protocols on qualified interfaces.
|
|
for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(),
|
|
E = OPT->qual_end(); I != E; ++I)
|
|
if (ObjCPropertyDecl *PD = (*I)->FindPropertyDeclaration(Member)) {
|
|
// Check whether we can reference this property.
|
|
if (DiagnoseUseOfDecl(PD, MemberLoc))
|
|
return ExprError();
|
|
|
|
if (Super)
|
|
return Owned(new (Context) ObjCPropertyRefExpr(PD,
|
|
Context.PseudoObjectTy,
|
|
VK_LValue,
|
|
OK_ObjCProperty,
|
|
MemberLoc,
|
|
SuperLoc, SuperType));
|
|
else
|
|
return Owned(new (Context) ObjCPropertyRefExpr(PD,
|
|
Context.PseudoObjectTy,
|
|
VK_LValue,
|
|
OK_ObjCProperty,
|
|
MemberLoc,
|
|
BaseExpr));
|
|
}
|
|
// If that failed, look for an "implicit" property by seeing if the nullary
|
|
// selector is implemented.
|
|
|
|
// FIXME: The logic for looking up nullary and unary selectors should be
|
|
// shared with the code in ActOnInstanceMessage.
|
|
|
|
Selector Sel = PP.getSelectorTable().getNullarySelector(Member);
|
|
ObjCMethodDecl *Getter = IFace->lookupInstanceMethod(Sel);
|
|
|
|
// May be founf in property's qualified list.
|
|
if (!Getter)
|
|
Getter = LookupMethodInQualifiedType(Sel, OPT, true);
|
|
|
|
// If this reference is in an @implementation, check for 'private' methods.
|
|
if (!Getter)
|
|
Getter = IFace->lookupPrivateMethod(Sel);
|
|
|
|
// Look through local category implementations associated with the class.
|
|
if (!Getter)
|
|
Getter = IFace->getCategoryInstanceMethod(Sel);
|
|
if (Getter) {
|
|
// Check if we can reference this property.
|
|
if (DiagnoseUseOfDecl(Getter, MemberLoc))
|
|
return ExprError();
|
|
}
|
|
// If we found a getter then this may be a valid dot-reference, we
|
|
// will look for the matching setter, in case it is needed.
|
|
Selector SetterSel =
|
|
SelectorTable::constructSetterName(PP.getIdentifierTable(),
|
|
PP.getSelectorTable(), Member);
|
|
ObjCMethodDecl *Setter = IFace->lookupInstanceMethod(SetterSel);
|
|
|
|
// May be founf in property's qualified list.
|
|
if (!Setter)
|
|
Setter = LookupMethodInQualifiedType(SetterSel, OPT, true);
|
|
|
|
if (!Setter) {
|
|
// If this reference is in an @implementation, also check for 'private'
|
|
// methods.
|
|
Setter = IFace->lookupPrivateMethod(SetterSel);
|
|
}
|
|
// Look through local category implementations associated with the class.
|
|
if (!Setter)
|
|
Setter = IFace->getCategoryInstanceMethod(SetterSel);
|
|
|
|
if (Setter && DiagnoseUseOfDecl(Setter, MemberLoc))
|
|
return ExprError();
|
|
|
|
if (Getter || Setter) {
|
|
if (Super)
|
|
return Owned(new (Context) ObjCPropertyRefExpr(Getter, Setter,
|
|
Context.PseudoObjectTy,
|
|
VK_LValue, OK_ObjCProperty,
|
|
MemberLoc,
|
|
SuperLoc, SuperType));
|
|
else
|
|
return Owned(new (Context) ObjCPropertyRefExpr(Getter, Setter,
|
|
Context.PseudoObjectTy,
|
|
VK_LValue, OK_ObjCProperty,
|
|
MemberLoc, BaseExpr));
|
|
|
|
}
|
|
|
|
// Attempt to correct for typos in property names.
|
|
DeclFilterCCC<ObjCPropertyDecl> Validator;
|
|
if (TypoCorrection Corrected = CorrectTypo(
|
|
DeclarationNameInfo(MemberName, MemberLoc), LookupOrdinaryName, NULL,
|
|
NULL, Validator, IFace, false, OPT)) {
|
|
ObjCPropertyDecl *Property =
|
|
Corrected.getCorrectionDeclAs<ObjCPropertyDecl>();
|
|
DeclarationName TypoResult = Corrected.getCorrection();
|
|
Diag(MemberLoc, diag::err_property_not_found_suggest)
|
|
<< MemberName << QualType(OPT, 0) << TypoResult
|
|
<< FixItHint::CreateReplacement(MemberLoc, TypoResult.getAsString());
|
|
Diag(Property->getLocation(), diag::note_previous_decl)
|
|
<< Property->getDeclName();
|
|
return HandleExprPropertyRefExpr(OPT, BaseExpr, OpLoc,
|
|
TypoResult, MemberLoc,
|
|
SuperLoc, SuperType, Super);
|
|
}
|
|
ObjCInterfaceDecl *ClassDeclared;
|
|
if (ObjCIvarDecl *Ivar =
|
|
IFace->lookupInstanceVariable(Member, ClassDeclared)) {
|
|
QualType T = Ivar->getType();
|
|
if (const ObjCObjectPointerType * OBJPT =
|
|
T->getAsObjCInterfacePointerType()) {
|
|
if (RequireCompleteType(MemberLoc, OBJPT->getPointeeType(),
|
|
diag::err_property_not_as_forward_class,
|
|
MemberName, BaseExpr))
|
|
return ExprError();
|
|
}
|
|
Diag(MemberLoc,
|
|
diag::err_ivar_access_using_property_syntax_suggest)
|
|
<< MemberName << QualType(OPT, 0) << Ivar->getDeclName()
|
|
<< FixItHint::CreateReplacement(OpLoc, "->");
|
|
return ExprError();
|
|
}
|
|
|
|
Diag(MemberLoc, diag::err_property_not_found)
|
|
<< MemberName << QualType(OPT, 0);
|
|
if (Setter)
|
|
Diag(Setter->getLocation(), diag::note_getter_unavailable)
|
|
<< MemberName << BaseExpr->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
|
|
|
|
ExprResult Sema::
|
|
ActOnClassPropertyRefExpr(IdentifierInfo &receiverName,
|
|
IdentifierInfo &propertyName,
|
|
SourceLocation receiverNameLoc,
|
|
SourceLocation propertyNameLoc) {
|
|
|
|
IdentifierInfo *receiverNamePtr = &receiverName;
|
|
ObjCInterfaceDecl *IFace = getObjCInterfaceDecl(receiverNamePtr,
|
|
receiverNameLoc);
|
|
|
|
bool IsSuper = false;
|
|
if (IFace == 0) {
|
|
// If the "receiver" is 'super' in a method, handle it as an expression-like
|
|
// property reference.
|
|
if (receiverNamePtr->isStr("super")) {
|
|
IsSuper = true;
|
|
|
|
if (ObjCMethodDecl *CurMethod = tryCaptureObjCSelf(receiverNameLoc)) {
|
|
if (CurMethod->isInstanceMethod()) {
|
|
QualType T =
|
|
Context.getObjCInterfaceType(CurMethod->getClassInterface());
|
|
T = Context.getObjCObjectPointerType(T);
|
|
|
|
return HandleExprPropertyRefExpr(T->getAsObjCInterfacePointerType(),
|
|
/*BaseExpr*/0,
|
|
SourceLocation()/*OpLoc*/,
|
|
&propertyName,
|
|
propertyNameLoc,
|
|
receiverNameLoc, T, true);
|
|
}
|
|
|
|
// Otherwise, if this is a class method, try dispatching to our
|
|
// superclass.
|
|
IFace = CurMethod->getClassInterface()->getSuperClass();
|
|
}
|
|
}
|
|
|
|
if (IFace == 0) {
|
|
Diag(receiverNameLoc, diag::err_expected_ident_or_lparen);
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
// Search for a declared property first.
|
|
Selector Sel = PP.getSelectorTable().getNullarySelector(&propertyName);
|
|
ObjCMethodDecl *Getter = IFace->lookupClassMethod(Sel);
|
|
|
|
// If this reference is in an @implementation, check for 'private' methods.
|
|
if (!Getter)
|
|
if (ObjCMethodDecl *CurMeth = getCurMethodDecl())
|
|
if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface())
|
|
if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
|
|
Getter = ImpDecl->getClassMethod(Sel);
|
|
|
|
if (Getter) {
|
|
// FIXME: refactor/share with ActOnMemberReference().
|
|
// Check if we can reference this property.
|
|
if (DiagnoseUseOfDecl(Getter, propertyNameLoc))
|
|
return ExprError();
|
|
}
|
|
|
|
// Look for the matching setter, in case it is needed.
|
|
Selector SetterSel =
|
|
SelectorTable::constructSetterName(PP.getIdentifierTable(),
|
|
PP.getSelectorTable(), &propertyName);
|
|
|
|
ObjCMethodDecl *Setter = IFace->lookupClassMethod(SetterSel);
|
|
if (!Setter) {
|
|
// If this reference is in an @implementation, also check for 'private'
|
|
// methods.
|
|
if (ObjCMethodDecl *CurMeth = getCurMethodDecl())
|
|
if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface())
|
|
if (ObjCImplementationDecl *ImpDecl = ClassDecl->getImplementation())
|
|
Setter = ImpDecl->getClassMethod(SetterSel);
|
|
}
|
|
// Look through local category implementations associated with the class.
|
|
if (!Setter)
|
|
Setter = IFace->getCategoryClassMethod(SetterSel);
|
|
|
|
if (Setter && DiagnoseUseOfDecl(Setter, propertyNameLoc))
|
|
return ExprError();
|
|
|
|
if (Getter || Setter) {
|
|
if (IsSuper)
|
|
return Owned(new (Context) ObjCPropertyRefExpr(Getter, Setter,
|
|
Context.PseudoObjectTy,
|
|
VK_LValue, OK_ObjCProperty,
|
|
propertyNameLoc,
|
|
receiverNameLoc,
|
|
Context.getObjCInterfaceType(IFace)));
|
|
|
|
return Owned(new (Context) ObjCPropertyRefExpr(Getter, Setter,
|
|
Context.PseudoObjectTy,
|
|
VK_LValue, OK_ObjCProperty,
|
|
propertyNameLoc,
|
|
receiverNameLoc, IFace));
|
|
}
|
|
return ExprError(Diag(propertyNameLoc, diag::err_property_not_found)
|
|
<< &propertyName << Context.getObjCInterfaceType(IFace));
|
|
}
|
|
|
|
namespace {
|
|
|
|
class ObjCInterfaceOrSuperCCC : public CorrectionCandidateCallback {
|
|
public:
|
|
ObjCInterfaceOrSuperCCC(ObjCMethodDecl *Method) {
|
|
// Determine whether "super" is acceptable in the current context.
|
|
if (Method && Method->getClassInterface())
|
|
WantObjCSuper = Method->getClassInterface()->getSuperClass();
|
|
}
|
|
|
|
virtual bool ValidateCandidate(const TypoCorrection &candidate) {
|
|
return candidate.getCorrectionDeclAs<ObjCInterfaceDecl>() ||
|
|
candidate.isKeyword("super");
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
Sema::ObjCMessageKind Sema::getObjCMessageKind(Scope *S,
|
|
IdentifierInfo *Name,
|
|
SourceLocation NameLoc,
|
|
bool IsSuper,
|
|
bool HasTrailingDot,
|
|
ParsedType &ReceiverType) {
|
|
ReceiverType = ParsedType();
|
|
|
|
// If the identifier is "super" and there is no trailing dot, we're
|
|
// messaging super. If the identifier is "super" and there is a
|
|
// trailing dot, it's an instance message.
|
|
if (IsSuper && S->isInObjcMethodScope())
|
|
return HasTrailingDot? ObjCInstanceMessage : ObjCSuperMessage;
|
|
|
|
LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName);
|
|
LookupName(Result, S);
|
|
|
|
switch (Result.getResultKind()) {
|
|
case LookupResult::NotFound:
|
|
// Normal name lookup didn't find anything. If we're in an
|
|
// Objective-C method, look for ivars. If we find one, we're done!
|
|
// FIXME: This is a hack. Ivar lookup should be part of normal
|
|
// lookup.
|
|
if (ObjCMethodDecl *Method = getCurMethodDecl()) {
|
|
if (!Method->getClassInterface()) {
|
|
// Fall back: let the parser try to parse it as an instance message.
|
|
return ObjCInstanceMessage;
|
|
}
|
|
|
|
ObjCInterfaceDecl *ClassDeclared;
|
|
if (Method->getClassInterface()->lookupInstanceVariable(Name,
|
|
ClassDeclared))
|
|
return ObjCInstanceMessage;
|
|
}
|
|
|
|
// Break out; we'll perform typo correction below.
|
|
break;
|
|
|
|
case LookupResult::NotFoundInCurrentInstantiation:
|
|
case LookupResult::FoundOverloaded:
|
|
case LookupResult::FoundUnresolvedValue:
|
|
case LookupResult::Ambiguous:
|
|
Result.suppressDiagnostics();
|
|
return ObjCInstanceMessage;
|
|
|
|
case LookupResult::Found: {
|
|
// If the identifier is a class or not, and there is a trailing dot,
|
|
// it's an instance message.
|
|
if (HasTrailingDot)
|
|
return ObjCInstanceMessage;
|
|
// We found something. If it's a type, then we have a class
|
|
// message. Otherwise, it's an instance message.
|
|
NamedDecl *ND = Result.getFoundDecl();
|
|
QualType T;
|
|
if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(ND))
|
|
T = Context.getObjCInterfaceType(Class);
|
|
else if (TypeDecl *Type = dyn_cast<TypeDecl>(ND))
|
|
T = Context.getTypeDeclType(Type);
|
|
else
|
|
return ObjCInstanceMessage;
|
|
|
|
// We have a class message, and T is the type we're
|
|
// messaging. Build source-location information for it.
|
|
TypeSourceInfo *TSInfo = Context.getTrivialTypeSourceInfo(T, NameLoc);
|
|
ReceiverType = CreateParsedType(T, TSInfo);
|
|
return ObjCClassMessage;
|
|
}
|
|
}
|
|
|
|
ObjCInterfaceOrSuperCCC Validator(getCurMethodDecl());
|
|
if (TypoCorrection Corrected = CorrectTypo(Result.getLookupNameInfo(),
|
|
Result.getLookupKind(), S, NULL,
|
|
Validator)) {
|
|
if (Corrected.isKeyword()) {
|
|
// If we've found the keyword "super" (the only keyword that would be
|
|
// returned by CorrectTypo), this is a send to super.
|
|
Diag(NameLoc, diag::err_unknown_receiver_suggest)
|
|
<< Name << Corrected.getCorrection()
|
|
<< FixItHint::CreateReplacement(SourceRange(NameLoc), "super");
|
|
return ObjCSuperMessage;
|
|
} else if (ObjCInterfaceDecl *Class =
|
|
Corrected.getCorrectionDeclAs<ObjCInterfaceDecl>()) {
|
|
// If we found a declaration, correct when it refers to an Objective-C
|
|
// class.
|
|
Diag(NameLoc, diag::err_unknown_receiver_suggest)
|
|
<< Name << Corrected.getCorrection()
|
|
<< FixItHint::CreateReplacement(SourceRange(NameLoc),
|
|
Class->getNameAsString());
|
|
Diag(Class->getLocation(), diag::note_previous_decl)
|
|
<< Corrected.getCorrection();
|
|
|
|
QualType T = Context.getObjCInterfaceType(Class);
|
|
TypeSourceInfo *TSInfo = Context.getTrivialTypeSourceInfo(T, NameLoc);
|
|
ReceiverType = CreateParsedType(T, TSInfo);
|
|
return ObjCClassMessage;
|
|
}
|
|
}
|
|
|
|
// Fall back: let the parser try to parse it as an instance message.
|
|
return ObjCInstanceMessage;
|
|
}
|
|
|
|
ExprResult Sema::ActOnSuperMessage(Scope *S,
|
|
SourceLocation SuperLoc,
|
|
Selector Sel,
|
|
SourceLocation LBracLoc,
|
|
ArrayRef<SourceLocation> SelectorLocs,
|
|
SourceLocation RBracLoc,
|
|
MultiExprArg Args) {
|
|
// Determine whether we are inside a method or not.
|
|
ObjCMethodDecl *Method = tryCaptureObjCSelf(SuperLoc);
|
|
if (!Method) {
|
|
Diag(SuperLoc, diag::err_invalid_receiver_to_message_super);
|
|
return ExprError();
|
|
}
|
|
|
|
ObjCInterfaceDecl *Class = Method->getClassInterface();
|
|
if (!Class) {
|
|
Diag(SuperLoc, diag::error_no_super_class_message)
|
|
<< Method->getDeclName();
|
|
return ExprError();
|
|
}
|
|
|
|
ObjCInterfaceDecl *Super = Class->getSuperClass();
|
|
if (!Super) {
|
|
// The current class does not have a superclass.
|
|
Diag(SuperLoc, diag::error_root_class_cannot_use_super)
|
|
<< Class->getIdentifier();
|
|
return ExprError();
|
|
}
|
|
|
|
// We are in a method whose class has a superclass, so 'super'
|
|
// is acting as a keyword.
|
|
if (Method->isInstanceMethod()) {
|
|
if (Sel.getMethodFamily() == OMF_dealloc)
|
|
ObjCShouldCallSuperDealloc = false;
|
|
if (Sel.getMethodFamily() == OMF_finalize)
|
|
ObjCShouldCallSuperFinalize = false;
|
|
|
|
// Since we are in an instance method, this is an instance
|
|
// message to the superclass instance.
|
|
QualType SuperTy = Context.getObjCInterfaceType(Super);
|
|
SuperTy = Context.getObjCObjectPointerType(SuperTy);
|
|
return BuildInstanceMessage(0, SuperTy, SuperLoc,
|
|
Sel, /*Method=*/0,
|
|
LBracLoc, SelectorLocs, RBracLoc, move(Args));
|
|
}
|
|
|
|
// Since we are in a class method, this is a class message to
|
|
// the superclass.
|
|
return BuildClassMessage(/*ReceiverTypeInfo=*/0,
|
|
Context.getObjCInterfaceType(Super),
|
|
SuperLoc, Sel, /*Method=*/0,
|
|
LBracLoc, SelectorLocs, RBracLoc, move(Args));
|
|
}
|
|
|
|
|
|
ExprResult Sema::BuildClassMessageImplicit(QualType ReceiverType,
|
|
bool isSuperReceiver,
|
|
SourceLocation Loc,
|
|
Selector Sel,
|
|
ObjCMethodDecl *Method,
|
|
MultiExprArg Args) {
|
|
TypeSourceInfo *receiverTypeInfo = 0;
|
|
if (!ReceiverType.isNull())
|
|
receiverTypeInfo = Context.getTrivialTypeSourceInfo(ReceiverType);
|
|
|
|
return BuildClassMessage(receiverTypeInfo, ReceiverType,
|
|
/*SuperLoc=*/isSuperReceiver ? Loc : SourceLocation(),
|
|
Sel, Method, Loc, Loc, Loc, Args,
|
|
/*isImplicit=*/true);
|
|
|
|
}
|
|
|
|
static void applyCocoaAPICheck(Sema &S, const ObjCMessageExpr *Msg,
|
|
unsigned DiagID,
|
|
bool (*refactor)(const ObjCMessageExpr *,
|
|
const NSAPI &, edit::Commit &)) {
|
|
SourceLocation MsgLoc = Msg->getExprLoc();
|
|
if (S.Diags.getDiagnosticLevel(DiagID, MsgLoc) == DiagnosticsEngine::Ignored)
|
|
return;
|
|
|
|
SourceManager &SM = S.SourceMgr;
|
|
edit::Commit ECommit(SM, S.LangOpts);
|
|
if (refactor(Msg,*S.NSAPIObj, ECommit)) {
|
|
DiagnosticBuilder Builder = S.Diag(MsgLoc, DiagID)
|
|
<< Msg->getSelector() << Msg->getSourceRange();
|
|
// FIXME: Don't emit diagnostic at all if fixits are non-commitable.
|
|
if (!ECommit.isCommitable())
|
|
return;
|
|
for (edit::Commit::edit_iterator
|
|
I = ECommit.edit_begin(), E = ECommit.edit_end(); I != E; ++I) {
|
|
const edit::Commit::Edit &Edit = *I;
|
|
switch (Edit.Kind) {
|
|
case edit::Commit::Act_Insert:
|
|
Builder.AddFixItHint(FixItHint::CreateInsertion(Edit.OrigLoc,
|
|
Edit.Text,
|
|
Edit.BeforePrev));
|
|
break;
|
|
case edit::Commit::Act_InsertFromRange:
|
|
Builder.AddFixItHint(
|
|
FixItHint::CreateInsertionFromRange(Edit.OrigLoc,
|
|
Edit.getInsertFromRange(SM),
|
|
Edit.BeforePrev));
|
|
break;
|
|
case edit::Commit::Act_Remove:
|
|
Builder.AddFixItHint(FixItHint::CreateRemoval(Edit.getFileRange(SM)));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void checkCocoaAPI(Sema &S, const ObjCMessageExpr *Msg) {
|
|
applyCocoaAPICheck(S, Msg, diag::warn_objc_redundant_literal_use,
|
|
edit::rewriteObjCRedundantCallWithLiteral);
|
|
}
|
|
|
|
/// \brief Build an Objective-C class message expression.
|
|
///
|
|
/// This routine takes care of both normal class messages and
|
|
/// class messages to the superclass.
|
|
///
|
|
/// \param ReceiverTypeInfo Type source information that describes the
|
|
/// receiver of this message. This may be NULL, in which case we are
|
|
/// sending to the superclass and \p SuperLoc must be a valid source
|
|
/// location.
|
|
|
|
/// \param ReceiverType The type of the object receiving the
|
|
/// message. When \p ReceiverTypeInfo is non-NULL, this is the same
|
|
/// type as that refers to. For a superclass send, this is the type of
|
|
/// the superclass.
|
|
///
|
|
/// \param SuperLoc The location of the "super" keyword in a
|
|
/// superclass message.
|
|
///
|
|
/// \param Sel The selector to which the message is being sent.
|
|
///
|
|
/// \param Method The method that this class message is invoking, if
|
|
/// already known.
|
|
///
|
|
/// \param LBracLoc The location of the opening square bracket ']'.
|
|
///
|
|
/// \param RBracLoc The location of the closing square bracket ']'.
|
|
///
|
|
/// \param ArgsIn The message arguments.
|
|
ExprResult Sema::BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
|
|
QualType ReceiverType,
|
|
SourceLocation SuperLoc,
|
|
Selector Sel,
|
|
ObjCMethodDecl *Method,
|
|
SourceLocation LBracLoc,
|
|
ArrayRef<SourceLocation> SelectorLocs,
|
|
SourceLocation RBracLoc,
|
|
MultiExprArg ArgsIn,
|
|
bool isImplicit) {
|
|
SourceLocation Loc = SuperLoc.isValid()? SuperLoc
|
|
: ReceiverTypeInfo->getTypeLoc().getSourceRange().getBegin();
|
|
if (LBracLoc.isInvalid()) {
|
|
Diag(Loc, diag::err_missing_open_square_message_send)
|
|
<< FixItHint::CreateInsertion(Loc, "[");
|
|
LBracLoc = Loc;
|
|
}
|
|
|
|
if (ReceiverType->isDependentType()) {
|
|
// If the receiver type is dependent, we can't type-check anything
|
|
// at this point. Build a dependent expression.
|
|
unsigned NumArgs = ArgsIn.size();
|
|
Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
|
|
assert(SuperLoc.isInvalid() && "Message to super with dependent type");
|
|
return Owned(ObjCMessageExpr::Create(Context, ReceiverType,
|
|
VK_RValue, LBracLoc, ReceiverTypeInfo,
|
|
Sel, SelectorLocs, /*Method=*/0,
|
|
makeArrayRef(Args, NumArgs),RBracLoc,
|
|
isImplicit));
|
|
}
|
|
|
|
// Find the class to which we are sending this message.
|
|
ObjCInterfaceDecl *Class = 0;
|
|
const ObjCObjectType *ClassType = ReceiverType->getAs<ObjCObjectType>();
|
|
if (!ClassType || !(Class = ClassType->getInterface())) {
|
|
Diag(Loc, diag::err_invalid_receiver_class_message)
|
|
<< ReceiverType;
|
|
return ExprError();
|
|
}
|
|
assert(Class && "We don't know which class we're messaging?");
|
|
// objc++ diagnoses during typename annotation.
|
|
if (!getLangOpts().CPlusPlus)
|
|
(void)DiagnoseUseOfDecl(Class, Loc);
|
|
// Find the method we are messaging.
|
|
if (!Method) {
|
|
SourceRange TypeRange
|
|
= SuperLoc.isValid()? SourceRange(SuperLoc)
|
|
: ReceiverTypeInfo->getTypeLoc().getSourceRange();
|
|
if (RequireCompleteType(Loc, Context.getObjCInterfaceType(Class),
|
|
(getLangOpts().ObjCAutoRefCount
|
|
? diag::err_arc_receiver_forward_class
|
|
: diag::warn_receiver_forward_class),
|
|
TypeRange)) {
|
|
// A forward class used in messaging is treated as a 'Class'
|
|
Method = LookupFactoryMethodInGlobalPool(Sel,
|
|
SourceRange(LBracLoc, RBracLoc));
|
|
if (Method && !getLangOpts().ObjCAutoRefCount)
|
|
Diag(Method->getLocation(), diag::note_method_sent_forward_class)
|
|
<< Method->getDeclName();
|
|
}
|
|
if (!Method)
|
|
Method = Class->lookupClassMethod(Sel);
|
|
|
|
// If we have an implementation in scope, check "private" methods.
|
|
if (!Method)
|
|
Method = LookupPrivateClassMethod(Sel, Class);
|
|
|
|
if (Method && DiagnoseUseOfDecl(Method, Loc))
|
|
return ExprError();
|
|
}
|
|
|
|
// Check the argument types and determine the result type.
|
|
QualType ReturnType;
|
|
ExprValueKind VK = VK_RValue;
|
|
|
|
unsigned NumArgs = ArgsIn.size();
|
|
Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
|
|
if (CheckMessageArgumentTypes(ReceiverType, Args, NumArgs, Sel, Method, true,
|
|
SuperLoc.isValid(), LBracLoc, RBracLoc,
|
|
ReturnType, VK))
|
|
return ExprError();
|
|
|
|
if (Method && !Method->getResultType()->isVoidType() &&
|
|
RequireCompleteType(LBracLoc, Method->getResultType(),
|
|
diag::err_illegal_message_expr_incomplete_type))
|
|
return ExprError();
|
|
|
|
// Construct the appropriate ObjCMessageExpr.
|
|
ObjCMessageExpr *Result;
|
|
if (SuperLoc.isValid())
|
|
Result = ObjCMessageExpr::Create(Context, ReturnType, VK, LBracLoc,
|
|
SuperLoc, /*IsInstanceSuper=*/false,
|
|
ReceiverType, Sel, SelectorLocs,
|
|
Method, makeArrayRef(Args, NumArgs),
|
|
RBracLoc, isImplicit);
|
|
else {
|
|
Result = ObjCMessageExpr::Create(Context, ReturnType, VK, LBracLoc,
|
|
ReceiverTypeInfo, Sel, SelectorLocs,
|
|
Method, makeArrayRef(Args, NumArgs),
|
|
RBracLoc, isImplicit);
|
|
if (!isImplicit)
|
|
checkCocoaAPI(*this, Result);
|
|
}
|
|
return MaybeBindToTemporary(Result);
|
|
}
|
|
|
|
// ActOnClassMessage - used for both unary and keyword messages.
|
|
// ArgExprs is optional - if it is present, the number of expressions
|
|
// is obtained from Sel.getNumArgs().
|
|
ExprResult Sema::ActOnClassMessage(Scope *S,
|
|
ParsedType Receiver,
|
|
Selector Sel,
|
|
SourceLocation LBracLoc,
|
|
ArrayRef<SourceLocation> SelectorLocs,
|
|
SourceLocation RBracLoc,
|
|
MultiExprArg Args) {
|
|
TypeSourceInfo *ReceiverTypeInfo;
|
|
QualType ReceiverType = GetTypeFromParser(Receiver, &ReceiverTypeInfo);
|
|
if (ReceiverType.isNull())
|
|
return ExprError();
|
|
|
|
|
|
if (!ReceiverTypeInfo)
|
|
ReceiverTypeInfo = Context.getTrivialTypeSourceInfo(ReceiverType, LBracLoc);
|
|
|
|
return BuildClassMessage(ReceiverTypeInfo, ReceiverType,
|
|
/*SuperLoc=*/SourceLocation(), Sel, /*Method=*/0,
|
|
LBracLoc, SelectorLocs, RBracLoc, move(Args));
|
|
}
|
|
|
|
ExprResult Sema::BuildInstanceMessageImplicit(Expr *Receiver,
|
|
QualType ReceiverType,
|
|
SourceLocation Loc,
|
|
Selector Sel,
|
|
ObjCMethodDecl *Method,
|
|
MultiExprArg Args) {
|
|
return BuildInstanceMessage(Receiver, ReceiverType,
|
|
/*SuperLoc=*/!Receiver ? Loc : SourceLocation(),
|
|
Sel, Method, Loc, Loc, Loc, Args,
|
|
/*isImplicit=*/true);
|
|
}
|
|
|
|
/// \brief Build an Objective-C instance message expression.
|
|
///
|
|
/// This routine takes care of both normal instance messages and
|
|
/// instance messages to the superclass instance.
|
|
///
|
|
/// \param Receiver The expression that computes the object that will
|
|
/// receive this message. This may be empty, in which case we are
|
|
/// sending to the superclass instance and \p SuperLoc must be a valid
|
|
/// source location.
|
|
///
|
|
/// \param ReceiverType The (static) type of the object receiving the
|
|
/// message. When a \p Receiver expression is provided, this is the
|
|
/// same type as that expression. For a superclass instance send, this
|
|
/// is a pointer to the type of the superclass.
|
|
///
|
|
/// \param SuperLoc The location of the "super" keyword in a
|
|
/// superclass instance message.
|
|
///
|
|
/// \param Sel The selector to which the message is being sent.
|
|
///
|
|
/// \param Method The method that this instance message is invoking, if
|
|
/// already known.
|
|
///
|
|
/// \param LBracLoc The location of the opening square bracket ']'.
|
|
///
|
|
/// \param RBracLoc The location of the closing square bracket ']'.
|
|
///
|
|
/// \param ArgsIn The message arguments.
|
|
ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
|
|
QualType ReceiverType,
|
|
SourceLocation SuperLoc,
|
|
Selector Sel,
|
|
ObjCMethodDecl *Method,
|
|
SourceLocation LBracLoc,
|
|
ArrayRef<SourceLocation> SelectorLocs,
|
|
SourceLocation RBracLoc,
|
|
MultiExprArg ArgsIn,
|
|
bool isImplicit) {
|
|
// The location of the receiver.
|
|
SourceLocation Loc = SuperLoc.isValid()? SuperLoc : Receiver->getLocStart();
|
|
|
|
if (LBracLoc.isInvalid()) {
|
|
Diag(Loc, diag::err_missing_open_square_message_send)
|
|
<< FixItHint::CreateInsertion(Loc, "[");
|
|
LBracLoc = Loc;
|
|
}
|
|
|
|
// If we have a receiver expression, perform appropriate promotions
|
|
// and determine receiver type.
|
|
if (Receiver) {
|
|
if (Receiver->hasPlaceholderType()) {
|
|
ExprResult Result;
|
|
if (Receiver->getType() == Context.UnknownAnyTy)
|
|
Result = forceUnknownAnyToType(Receiver, Context.getObjCIdType());
|
|
else
|
|
Result = CheckPlaceholderExpr(Receiver);
|
|
if (Result.isInvalid()) return ExprError();
|
|
Receiver = Result.take();
|
|
}
|
|
|
|
if (Receiver->isTypeDependent()) {
|
|
// If the receiver is type-dependent, we can't type-check anything
|
|
// at this point. Build a dependent expression.
|
|
unsigned NumArgs = ArgsIn.size();
|
|
Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
|
|
assert(SuperLoc.isInvalid() && "Message to super with dependent type");
|
|
return Owned(ObjCMessageExpr::Create(Context, Context.DependentTy,
|
|
VK_RValue, LBracLoc, Receiver, Sel,
|
|
SelectorLocs, /*Method=*/0,
|
|
makeArrayRef(Args, NumArgs),
|
|
RBracLoc, isImplicit));
|
|
}
|
|
|
|
// If necessary, apply function/array conversion to the receiver.
|
|
// C99 6.7.5.3p[7,8].
|
|
ExprResult Result = DefaultFunctionArrayLvalueConversion(Receiver);
|
|
if (Result.isInvalid())
|
|
return ExprError();
|
|
Receiver = Result.take();
|
|
ReceiverType = Receiver->getType();
|
|
}
|
|
|
|
if (!Method) {
|
|
// Handle messages to id.
|
|
bool receiverIsId = ReceiverType->isObjCIdType();
|
|
if (receiverIsId || ReceiverType->isBlockPointerType() ||
|
|
(Receiver && Context.isObjCNSObjectType(Receiver->getType()))) {
|
|
Method = LookupInstanceMethodInGlobalPool(Sel,
|
|
SourceRange(LBracLoc, RBracLoc),
|
|
receiverIsId);
|
|
if (!Method)
|
|
Method = LookupFactoryMethodInGlobalPool(Sel,
|
|
SourceRange(LBracLoc,RBracLoc),
|
|
receiverIsId);
|
|
} else if (ReceiverType->isObjCClassType() ||
|
|
ReceiverType->isObjCQualifiedClassType()) {
|
|
// Handle messages to Class.
|
|
// We allow sending a message to a qualified Class ("Class<foo>"), which
|
|
// is ok as long as one of the protocols implements the selector (if not, warn).
|
|
if (const ObjCObjectPointerType *QClassTy
|
|
= ReceiverType->getAsObjCQualifiedClassType()) {
|
|
// Search protocols for class methods.
|
|
Method = LookupMethodInQualifiedType(Sel, QClassTy, false);
|
|
if (!Method) {
|
|
Method = LookupMethodInQualifiedType(Sel, QClassTy, true);
|
|
// warn if instance method found for a Class message.
|
|
if (Method) {
|
|
Diag(Loc, diag::warn_instance_method_on_class_found)
|
|
<< Method->getSelector() << Sel;
|
|
Diag(Method->getLocation(), diag::note_method_declared_at)
|
|
<< Method->getDeclName();
|
|
}
|
|
}
|
|
} else {
|
|
if (ObjCMethodDecl *CurMeth = getCurMethodDecl()) {
|
|
if (ObjCInterfaceDecl *ClassDecl = CurMeth->getClassInterface()) {
|
|
// First check the public methods in the class interface.
|
|
Method = ClassDecl->lookupClassMethod(Sel);
|
|
|
|
if (!Method)
|
|
Method = LookupPrivateClassMethod(Sel, ClassDecl);
|
|
}
|
|
if (Method && DiagnoseUseOfDecl(Method, Loc))
|
|
return ExprError();
|
|
}
|
|
if (!Method) {
|
|
// If not messaging 'self', look for any factory method named 'Sel'.
|
|
if (!Receiver || !isSelfExpr(Receiver)) {
|
|
Method = LookupFactoryMethodInGlobalPool(Sel,
|
|
SourceRange(LBracLoc, RBracLoc),
|
|
true);
|
|
if (!Method) {
|
|
// If no class (factory) method was found, check if an _instance_
|
|
// method of the same name exists in the root class only.
|
|
Method = LookupInstanceMethodInGlobalPool(Sel,
|
|
SourceRange(LBracLoc, RBracLoc),
|
|
true);
|
|
if (Method)
|
|
if (const ObjCInterfaceDecl *ID =
|
|
dyn_cast<ObjCInterfaceDecl>(Method->getDeclContext())) {
|
|
if (ID->getSuperClass())
|
|
Diag(Loc, diag::warn_root_inst_method_not_found)
|
|
<< Sel << SourceRange(LBracLoc, RBracLoc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
ObjCInterfaceDecl* ClassDecl = 0;
|
|
|
|
// We allow sending a message to a qualified ID ("id<foo>"), which is ok as
|
|
// long as one of the protocols implements the selector (if not, warn).
|
|
// And as long as message is not deprecated/unavailable (warn if it is).
|
|
if (const ObjCObjectPointerType *QIdTy
|
|
= ReceiverType->getAsObjCQualifiedIdType()) {
|
|
// Search protocols for instance methods.
|
|
Method = LookupMethodInQualifiedType(Sel, QIdTy, true);
|
|
if (!Method)
|
|
Method = LookupMethodInQualifiedType(Sel, QIdTy, false);
|
|
if (Method && DiagnoseUseOfDecl(Method, Loc))
|
|
return ExprError();
|
|
} else if (const ObjCObjectPointerType *OCIType
|
|
= ReceiverType->getAsObjCInterfacePointerType()) {
|
|
// We allow sending a message to a pointer to an interface (an object).
|
|
ClassDecl = OCIType->getInterfaceDecl();
|
|
|
|
// Try to complete the type. Under ARC, this is a hard error from which
|
|
// we don't try to recover.
|
|
const ObjCInterfaceDecl *forwardClass = 0;
|
|
if (RequireCompleteType(Loc, OCIType->getPointeeType(),
|
|
getLangOpts().ObjCAutoRefCount
|
|
? diag::err_arc_receiver_forward_instance
|
|
: diag::warn_receiver_forward_instance,
|
|
Receiver? Receiver->getSourceRange()
|
|
: SourceRange(SuperLoc))) {
|
|
if (getLangOpts().ObjCAutoRefCount)
|
|
return ExprError();
|
|
|
|
forwardClass = OCIType->getInterfaceDecl();
|
|
Diag(Receiver ? Receiver->getLocStart()
|
|
: SuperLoc, diag::note_receiver_is_id);
|
|
Method = 0;
|
|
} else {
|
|
Method = ClassDecl->lookupInstanceMethod(Sel);
|
|
}
|
|
|
|
if (!Method)
|
|
// Search protocol qualifiers.
|
|
Method = LookupMethodInQualifiedType(Sel, OCIType, true);
|
|
|
|
if (!Method) {
|
|
// If we have implementations in scope, check "private" methods.
|
|
Method = LookupPrivateInstanceMethod(Sel, ClassDecl);
|
|
|
|
if (!Method && getLangOpts().ObjCAutoRefCount) {
|
|
Diag(Loc, diag::err_arc_may_not_respond)
|
|
<< OCIType->getPointeeType() << Sel;
|
|
return ExprError();
|
|
}
|
|
|
|
if (!Method && (!Receiver || !isSelfExpr(Receiver))) {
|
|
// If we still haven't found a method, look in the global pool. This
|
|
// behavior isn't very desirable, however we need it for GCC
|
|
// compatibility. FIXME: should we deviate??
|
|
if (OCIType->qual_empty()) {
|
|
Method = LookupInstanceMethodInGlobalPool(Sel,
|
|
SourceRange(LBracLoc, RBracLoc));
|
|
if (Method && !forwardClass)
|
|
Diag(Loc, diag::warn_maynot_respond)
|
|
<< OCIType->getInterfaceDecl()->getIdentifier() << Sel;
|
|
}
|
|
}
|
|
}
|
|
if (Method && DiagnoseUseOfDecl(Method, Loc, forwardClass))
|
|
return ExprError();
|
|
} else if (!getLangOpts().ObjCAutoRefCount &&
|
|
!Context.getObjCIdType().isNull() &&
|
|
(ReceiverType->isPointerType() ||
|
|
ReceiverType->isIntegerType())) {
|
|
// Implicitly convert integers and pointers to 'id' but emit a warning.
|
|
// But not in ARC.
|
|
Diag(Loc, diag::warn_bad_receiver_type)
|
|
<< ReceiverType
|
|
<< Receiver->getSourceRange();
|
|
if (ReceiverType->isPointerType())
|
|
Receiver = ImpCastExprToType(Receiver, Context.getObjCIdType(),
|
|
CK_CPointerToObjCPointerCast).take();
|
|
else {
|
|
// TODO: specialized warning on null receivers?
|
|
bool IsNull = Receiver->isNullPointerConstant(Context,
|
|
Expr::NPC_ValueDependentIsNull);
|
|
CastKind Kind = IsNull ? CK_NullToPointer : CK_IntegralToPointer;
|
|
Receiver = ImpCastExprToType(Receiver, Context.getObjCIdType(),
|
|
Kind).take();
|
|
}
|
|
ReceiverType = Receiver->getType();
|
|
} else {
|
|
ExprResult ReceiverRes;
|
|
if (getLangOpts().CPlusPlus)
|
|
ReceiverRes = PerformContextuallyConvertToObjCPointer(Receiver);
|
|
if (ReceiverRes.isUsable()) {
|
|
Receiver = ReceiverRes.take();
|
|
return BuildInstanceMessage(Receiver,
|
|
ReceiverType,
|
|
SuperLoc,
|
|
Sel,
|
|
Method,
|
|
LBracLoc,
|
|
SelectorLocs,
|
|
RBracLoc,
|
|
move(ArgsIn));
|
|
} else {
|
|
// Reject other random receiver types (e.g. structs).
|
|
Diag(Loc, diag::err_bad_receiver_type)
|
|
<< ReceiverType << Receiver->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check the message arguments.
|
|
unsigned NumArgs = ArgsIn.size();
|
|
Expr **Args = reinterpret_cast<Expr **>(ArgsIn.release());
|
|
QualType ReturnType;
|
|
ExprValueKind VK = VK_RValue;
|
|
bool ClassMessage = (ReceiverType->isObjCClassType() ||
|
|
ReceiverType->isObjCQualifiedClassType());
|
|
if (CheckMessageArgumentTypes(ReceiverType, Args, NumArgs, Sel, Method,
|
|
ClassMessage, SuperLoc.isValid(),
|
|
LBracLoc, RBracLoc, ReturnType, VK))
|
|
return ExprError();
|
|
|
|
if (Method && !Method->getResultType()->isVoidType() &&
|
|
RequireCompleteType(LBracLoc, Method->getResultType(),
|
|
diag::err_illegal_message_expr_incomplete_type))
|
|
return ExprError();
|
|
|
|
SourceLocation SelLoc = SelectorLocs.front();
|
|
|
|
// In ARC, forbid the user from sending messages to
|
|
// retain/release/autorelease/dealloc/retainCount explicitly.
|
|
if (getLangOpts().ObjCAutoRefCount) {
|
|
ObjCMethodFamily family =
|
|
(Method ? Method->getMethodFamily() : Sel.getMethodFamily());
|
|
switch (family) {
|
|
case OMF_init:
|
|
if (Method)
|
|
checkInitMethod(Method, ReceiverType);
|
|
|
|
case OMF_None:
|
|
case OMF_alloc:
|
|
case OMF_copy:
|
|
case OMF_finalize:
|
|
case OMF_mutableCopy:
|
|
case OMF_new:
|
|
case OMF_self:
|
|
break;
|
|
|
|
case OMF_dealloc:
|
|
case OMF_retain:
|
|
case OMF_release:
|
|
case OMF_autorelease:
|
|
case OMF_retainCount:
|
|
Diag(Loc, diag::err_arc_illegal_explicit_message)
|
|
<< Sel << SelLoc;
|
|
break;
|
|
|
|
case OMF_performSelector:
|
|
if (Method && NumArgs >= 1) {
|
|
if (ObjCSelectorExpr *SelExp = dyn_cast<ObjCSelectorExpr>(Args[0])) {
|
|
Selector ArgSel = SelExp->getSelector();
|
|
ObjCMethodDecl *SelMethod =
|
|
LookupInstanceMethodInGlobalPool(ArgSel,
|
|
SelExp->getSourceRange());
|
|
if (!SelMethod)
|
|
SelMethod =
|
|
LookupFactoryMethodInGlobalPool(ArgSel,
|
|
SelExp->getSourceRange());
|
|
if (SelMethod) {
|
|
ObjCMethodFamily SelFamily = SelMethod->getMethodFamily();
|
|
switch (SelFamily) {
|
|
case OMF_alloc:
|
|
case OMF_copy:
|
|
case OMF_mutableCopy:
|
|
case OMF_new:
|
|
case OMF_self:
|
|
case OMF_init:
|
|
// Issue error, unless ns_returns_not_retained.
|
|
if (!SelMethod->hasAttr<NSReturnsNotRetainedAttr>()) {
|
|
// selector names a +1 method
|
|
Diag(SelLoc,
|
|
diag::err_arc_perform_selector_retains);
|
|
Diag(SelMethod->getLocation(), diag::note_method_declared_at)
|
|
<< SelMethod->getDeclName();
|
|
}
|
|
break;
|
|
default:
|
|
// +0 call. OK. unless ns_returns_retained.
|
|
if (SelMethod->hasAttr<NSReturnsRetainedAttr>()) {
|
|
// selector names a +1 method
|
|
Diag(SelLoc,
|
|
diag::err_arc_perform_selector_retains);
|
|
Diag(SelMethod->getLocation(), diag::note_method_declared_at)
|
|
<< SelMethod->getDeclName();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
// error (may leak).
|
|
Diag(SelLoc, diag::warn_arc_perform_selector_leaks);
|
|
Diag(Args[0]->getExprLoc(), diag::note_used_here);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Construct the appropriate ObjCMessageExpr instance.
|
|
ObjCMessageExpr *Result;
|
|
if (SuperLoc.isValid())
|
|
Result = ObjCMessageExpr::Create(Context, ReturnType, VK, LBracLoc,
|
|
SuperLoc, /*IsInstanceSuper=*/true,
|
|
ReceiverType, Sel, SelectorLocs, Method,
|
|
makeArrayRef(Args, NumArgs), RBracLoc,
|
|
isImplicit);
|
|
else {
|
|
Result = ObjCMessageExpr::Create(Context, ReturnType, VK, LBracLoc,
|
|
Receiver, Sel, SelectorLocs, Method,
|
|
makeArrayRef(Args, NumArgs), RBracLoc,
|
|
isImplicit);
|
|
if (!isImplicit)
|
|
checkCocoaAPI(*this, Result);
|
|
}
|
|
|
|
if (getLangOpts().ObjCAutoRefCount) {
|
|
DiagnoseARCUseOfWeakReceiver(*this, Receiver);
|
|
|
|
// In ARC, annotate delegate init calls.
|
|
if (Result->getMethodFamily() == OMF_init &&
|
|
(SuperLoc.isValid() || isSelfExpr(Receiver))) {
|
|
// Only consider init calls *directly* in init implementations,
|
|
// not within blocks.
|
|
ObjCMethodDecl *method = dyn_cast<ObjCMethodDecl>(CurContext);
|
|
if (method && method->getMethodFamily() == OMF_init) {
|
|
// The implicit assignment to self means we also don't want to
|
|
// consume the result.
|
|
Result->setDelegateInitCall(true);
|
|
return Owned(Result);
|
|
}
|
|
}
|
|
|
|
// In ARC, check for message sends which are likely to introduce
|
|
// retain cycles.
|
|
checkRetainCycles(Result);
|
|
}
|
|
|
|
return MaybeBindToTemporary(Result);
|
|
}
|
|
|
|
// ActOnInstanceMessage - used for both unary and keyword messages.
|
|
// ArgExprs is optional - if it is present, the number of expressions
|
|
// is obtained from Sel.getNumArgs().
|
|
ExprResult Sema::ActOnInstanceMessage(Scope *S,
|
|
Expr *Receiver,
|
|
Selector Sel,
|
|
SourceLocation LBracLoc,
|
|
ArrayRef<SourceLocation> SelectorLocs,
|
|
SourceLocation RBracLoc,
|
|
MultiExprArg Args) {
|
|
if (!Receiver)
|
|
return ExprError();
|
|
|
|
return BuildInstanceMessage(Receiver, Receiver->getType(),
|
|
/*SuperLoc=*/SourceLocation(), Sel, /*Method=*/0,
|
|
LBracLoc, SelectorLocs, RBracLoc, move(Args));
|
|
}
|
|
|
|
enum ARCConversionTypeClass {
|
|
/// int, void, struct A
|
|
ACTC_none,
|
|
|
|
/// id, void (^)()
|
|
ACTC_retainable,
|
|
|
|
/// id*, id***, void (^*)(),
|
|
ACTC_indirectRetainable,
|
|
|
|
/// void* might be a normal C type, or it might a CF type.
|
|
ACTC_voidPtr,
|
|
|
|
/// struct A*
|
|
ACTC_coreFoundation
|
|
};
|
|
static bool isAnyRetainable(ARCConversionTypeClass ACTC) {
|
|
return (ACTC == ACTC_retainable ||
|
|
ACTC == ACTC_coreFoundation ||
|
|
ACTC == ACTC_voidPtr);
|
|
}
|
|
static bool isAnyCLike(ARCConversionTypeClass ACTC) {
|
|
return ACTC == ACTC_none ||
|
|
ACTC == ACTC_voidPtr ||
|
|
ACTC == ACTC_coreFoundation;
|
|
}
|
|
|
|
static ARCConversionTypeClass classifyTypeForARCConversion(QualType type) {
|
|
bool isIndirect = false;
|
|
|
|
// Ignore an outermost reference type.
|
|
if (const ReferenceType *ref = type->getAs<ReferenceType>()) {
|
|
type = ref->getPointeeType();
|
|
isIndirect = true;
|
|
}
|
|
|
|
// Drill through pointers and arrays recursively.
|
|
while (true) {
|
|
if (const PointerType *ptr = type->getAs<PointerType>()) {
|
|
type = ptr->getPointeeType();
|
|
|
|
// The first level of pointer may be the innermost pointer on a CF type.
|
|
if (!isIndirect) {
|
|
if (type->isVoidType()) return ACTC_voidPtr;
|
|
if (type->isRecordType()) return ACTC_coreFoundation;
|
|
}
|
|
} else if (const ArrayType *array = type->getAsArrayTypeUnsafe()) {
|
|
type = QualType(array->getElementType()->getBaseElementTypeUnsafe(), 0);
|
|
} else {
|
|
break;
|
|
}
|
|
isIndirect = true;
|
|
}
|
|
|
|
if (isIndirect) {
|
|
if (type->isObjCARCBridgableType())
|
|
return ACTC_indirectRetainable;
|
|
return ACTC_none;
|
|
}
|
|
|
|
if (type->isObjCARCBridgableType())
|
|
return ACTC_retainable;
|
|
|
|
return ACTC_none;
|
|
}
|
|
|
|
namespace {
|
|
/// A result from the cast checker.
|
|
enum ACCResult {
|
|
/// Cannot be casted.
|
|
ACC_invalid,
|
|
|
|
/// Can be safely retained or not retained.
|
|
ACC_bottom,
|
|
|
|
/// Can be casted at +0.
|
|
ACC_plusZero,
|
|
|
|
/// Can be casted at +1.
|
|
ACC_plusOne
|
|
};
|
|
ACCResult merge(ACCResult left, ACCResult right) {
|
|
if (left == right) return left;
|
|
if (left == ACC_bottom) return right;
|
|
if (right == ACC_bottom) return left;
|
|
return ACC_invalid;
|
|
}
|
|
|
|
/// A checker which white-lists certain expressions whose conversion
|
|
/// to or from retainable type would otherwise be forbidden in ARC.
|
|
class ARCCastChecker : public StmtVisitor<ARCCastChecker, ACCResult> {
|
|
typedef StmtVisitor<ARCCastChecker, ACCResult> super;
|
|
|
|
ASTContext &Context;
|
|
ARCConversionTypeClass SourceClass;
|
|
ARCConversionTypeClass TargetClass;
|
|
|
|
static bool isCFType(QualType type) {
|
|
// Someday this can use ns_bridged. For now, it has to do this.
|
|
return type->isCARCBridgableType();
|
|
}
|
|
|
|
public:
|
|
ARCCastChecker(ASTContext &Context, ARCConversionTypeClass source,
|
|
ARCConversionTypeClass target)
|
|
: Context(Context), SourceClass(source), TargetClass(target) {}
|
|
|
|
using super::Visit;
|
|
ACCResult Visit(Expr *e) {
|
|
return super::Visit(e->IgnoreParens());
|
|
}
|
|
|
|
ACCResult VisitStmt(Stmt *s) {
|
|
return ACC_invalid;
|
|
}
|
|
|
|
/// Null pointer constants can be casted however you please.
|
|
ACCResult VisitExpr(Expr *e) {
|
|
if (e->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNotNull))
|
|
return ACC_bottom;
|
|
return ACC_invalid;
|
|
}
|
|
|
|
/// Objective-C string literals can be safely casted.
|
|
ACCResult VisitObjCStringLiteral(ObjCStringLiteral *e) {
|
|
// If we're casting to any retainable type, go ahead. Global
|
|
// strings are immune to retains, so this is bottom.
|
|
if (isAnyRetainable(TargetClass)) return ACC_bottom;
|
|
|
|
return ACC_invalid;
|
|
}
|
|
|
|
/// Look through certain implicit and explicit casts.
|
|
ACCResult VisitCastExpr(CastExpr *e) {
|
|
switch (e->getCastKind()) {
|
|
case CK_NullToPointer:
|
|
return ACC_bottom;
|
|
|
|
case CK_NoOp:
|
|
case CK_LValueToRValue:
|
|
case CK_BitCast:
|
|
case CK_CPointerToObjCPointerCast:
|
|
case CK_BlockPointerToObjCPointerCast:
|
|
case CK_AnyPointerToBlockPointerCast:
|
|
return Visit(e->getSubExpr());
|
|
|
|
default:
|
|
return ACC_invalid;
|
|
}
|
|
}
|
|
|
|
/// Look through unary extension.
|
|
ACCResult VisitUnaryExtension(UnaryOperator *e) {
|
|
return Visit(e->getSubExpr());
|
|
}
|
|
|
|
/// Ignore the LHS of a comma operator.
|
|
ACCResult VisitBinComma(BinaryOperator *e) {
|
|
return Visit(e->getRHS());
|
|
}
|
|
|
|
/// Conditional operators are okay if both sides are okay.
|
|
ACCResult VisitConditionalOperator(ConditionalOperator *e) {
|
|
ACCResult left = Visit(e->getTrueExpr());
|
|
if (left == ACC_invalid) return ACC_invalid;
|
|
return merge(left, Visit(e->getFalseExpr()));
|
|
}
|
|
|
|
/// Look through pseudo-objects.
|
|
ACCResult VisitPseudoObjectExpr(PseudoObjectExpr *e) {
|
|
// If we're getting here, we should always have a result.
|
|
return Visit(e->getResultExpr());
|
|
}
|
|
|
|
/// Statement expressions are okay if their result expression is okay.
|
|
ACCResult VisitStmtExpr(StmtExpr *e) {
|
|
return Visit(e->getSubStmt()->body_back());
|
|
}
|
|
|
|
/// Some declaration references are okay.
|
|
ACCResult VisitDeclRefExpr(DeclRefExpr *e) {
|
|
// References to global constants from system headers are okay.
|
|
// These are things like 'kCFStringTransformToLatin'. They are
|
|
// can also be assumed to be immune to retains.
|
|
VarDecl *var = dyn_cast<VarDecl>(e->getDecl());
|
|
if (isAnyRetainable(TargetClass) &&
|
|
isAnyRetainable(SourceClass) &&
|
|
var &&
|
|
var->getStorageClass() == SC_Extern &&
|
|
var->getType().isConstQualified() &&
|
|
Context.getSourceManager().isInSystemHeader(var->getLocation())) {
|
|
return ACC_bottom;
|
|
}
|
|
|
|
// Nothing else.
|
|
return ACC_invalid;
|
|
}
|
|
|
|
/// Some calls are okay.
|
|
ACCResult VisitCallExpr(CallExpr *e) {
|
|
if (FunctionDecl *fn = e->getDirectCallee())
|
|
if (ACCResult result = checkCallToFunction(fn))
|
|
return result;
|
|
|
|
return super::VisitCallExpr(e);
|
|
}
|
|
|
|
ACCResult checkCallToFunction(FunctionDecl *fn) {
|
|
// Require a CF*Ref return type.
|
|
if (!isCFType(fn->getResultType()))
|
|
return ACC_invalid;
|
|
|
|
if (!isAnyRetainable(TargetClass))
|
|
return ACC_invalid;
|
|
|
|
// Honor an explicit 'not retained' attribute.
|
|
if (fn->hasAttr<CFReturnsNotRetainedAttr>())
|
|
return ACC_plusZero;
|
|
|
|
// Honor an explicit 'retained' attribute, except that for
|
|
// now we're not going to permit implicit handling of +1 results,
|
|
// because it's a bit frightening.
|
|
if (fn->hasAttr<CFReturnsRetainedAttr>())
|
|
return ACC_invalid; // ACC_plusOne if we start accepting this
|
|
|
|
// Recognize this specific builtin function, which is used by CFSTR.
|
|
unsigned builtinID = fn->getBuiltinID();
|
|
if (builtinID == Builtin::BI__builtin___CFStringMakeConstantString)
|
|
return ACC_bottom;
|
|
|
|
// Otherwise, don't do anything implicit with an unaudited function.
|
|
if (!fn->hasAttr<CFAuditedTransferAttr>())
|
|
return ACC_invalid;
|
|
|
|
// Otherwise, it's +0 unless it follows the create convention.
|
|
if (ento::coreFoundation::followsCreateRule(fn))
|
|
return ACC_invalid; // ACC_plusOne if we start accepting this
|
|
|
|
return ACC_plusZero;
|
|
}
|
|
|
|
ACCResult VisitObjCMessageExpr(ObjCMessageExpr *e) {
|
|
return checkCallToMethod(e->getMethodDecl());
|
|
}
|
|
|
|
ACCResult VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *e) {
|
|
ObjCMethodDecl *method;
|
|
if (e->isExplicitProperty())
|
|
method = e->getExplicitProperty()->getGetterMethodDecl();
|
|
else
|
|
method = e->getImplicitPropertyGetter();
|
|
return checkCallToMethod(method);
|
|
}
|
|
|
|
ACCResult checkCallToMethod(ObjCMethodDecl *method) {
|
|
if (!method) return ACC_invalid;
|
|
|
|
// Check for message sends to functions returning CF types. We
|
|
// just obey the Cocoa conventions with these, even though the
|
|
// return type is CF.
|
|
if (!isAnyRetainable(TargetClass) || !isCFType(method->getResultType()))
|
|
return ACC_invalid;
|
|
|
|
// If the method is explicitly marked not-retained, it's +0.
|
|
if (method->hasAttr<CFReturnsNotRetainedAttr>())
|
|
return ACC_plusZero;
|
|
|
|
// If the method is explicitly marked as returning retained, or its
|
|
// selector follows a +1 Cocoa convention, treat it as +1.
|
|
if (method->hasAttr<CFReturnsRetainedAttr>())
|
|
return ACC_plusOne;
|
|
|
|
switch (method->getSelector().getMethodFamily()) {
|
|
case OMF_alloc:
|
|
case OMF_copy:
|
|
case OMF_mutableCopy:
|
|
case OMF_new:
|
|
return ACC_plusOne;
|
|
|
|
default:
|
|
// Otherwise, treat it as +0.
|
|
return ACC_plusZero;
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
bool Sema::isKnownName(StringRef name) {
|
|
if (name.empty())
|
|
return false;
|
|
LookupResult R(*this, &Context.Idents.get(name), SourceLocation(),
|
|
Sema::LookupOrdinaryName);
|
|
return LookupName(R, TUScope, false);
|
|
}
|
|
|
|
static void addFixitForObjCARCConversion(Sema &S,
|
|
DiagnosticBuilder &DiagB,
|
|
Sema::CheckedConversionKind CCK,
|
|
SourceLocation afterLParen,
|
|
QualType castType,
|
|
Expr *castExpr,
|
|
const char *bridgeKeyword,
|
|
const char *CFBridgeName) {
|
|
// We handle C-style and implicit casts here.
|
|
switch (CCK) {
|
|
case Sema::CCK_ImplicitConversion:
|
|
case Sema::CCK_CStyleCast:
|
|
break;
|
|
case Sema::CCK_FunctionalCast:
|
|
case Sema::CCK_OtherCast:
|
|
return;
|
|
}
|
|
|
|
if (CFBridgeName) {
|
|
Expr *castedE = castExpr;
|
|
if (CStyleCastExpr *CCE = dyn_cast<CStyleCastExpr>(castedE))
|
|
castedE = CCE->getSubExpr();
|
|
castedE = castedE->IgnoreImpCasts();
|
|
SourceRange range = castedE->getSourceRange();
|
|
|
|
SmallString<32> BridgeCall;
|
|
|
|
SourceManager &SM = S.getSourceManager();
|
|
char PrevChar = *SM.getCharacterData(range.getBegin().getLocWithOffset(-1));
|
|
if (Lexer::isIdentifierBodyChar(PrevChar, S.getLangOpts()))
|
|
BridgeCall += ' ';
|
|
|
|
BridgeCall += CFBridgeName;
|
|
|
|
if (isa<ParenExpr>(castedE)) {
|
|
DiagB.AddFixItHint(FixItHint::CreateInsertion(range.getBegin(),
|
|
BridgeCall));
|
|
} else {
|
|
BridgeCall += '(';
|
|
DiagB.AddFixItHint(FixItHint::CreateInsertion(range.getBegin(),
|
|
BridgeCall));
|
|
DiagB.AddFixItHint(FixItHint::CreateInsertion(
|
|
S.PP.getLocForEndOfToken(range.getEnd()),
|
|
")"));
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (CCK == Sema::CCK_CStyleCast) {
|
|
DiagB.AddFixItHint(FixItHint::CreateInsertion(afterLParen, bridgeKeyword));
|
|
} else {
|
|
std::string castCode = "(";
|
|
castCode += bridgeKeyword;
|
|
castCode += castType.getAsString();
|
|
castCode += ")";
|
|
Expr *castedE = castExpr->IgnoreImpCasts();
|
|
SourceRange range = castedE->getSourceRange();
|
|
if (isa<ParenExpr>(castedE)) {
|
|
DiagB.AddFixItHint(FixItHint::CreateInsertion(range.getBegin(),
|
|
castCode));
|
|
} else {
|
|
castCode += "(";
|
|
DiagB.AddFixItHint(FixItHint::CreateInsertion(range.getBegin(),
|
|
castCode));
|
|
DiagB.AddFixItHint(FixItHint::CreateInsertion(
|
|
S.PP.getLocForEndOfToken(range.getEnd()),
|
|
")"));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
diagnoseObjCARCConversion(Sema &S, SourceRange castRange,
|
|
QualType castType, ARCConversionTypeClass castACTC,
|
|
Expr *castExpr, ARCConversionTypeClass exprACTC,
|
|
Sema::CheckedConversionKind CCK) {
|
|
SourceLocation loc =
|
|
(castRange.isValid() ? castRange.getBegin() : castExpr->getExprLoc());
|
|
|
|
if (S.makeUnavailableInSystemHeader(loc,
|
|
"converts between Objective-C and C pointers in -fobjc-arc"))
|
|
return;
|
|
|
|
QualType castExprType = castExpr->getType();
|
|
|
|
unsigned srcKind = 0;
|
|
switch (exprACTC) {
|
|
case ACTC_none:
|
|
case ACTC_coreFoundation:
|
|
case ACTC_voidPtr:
|
|
srcKind = (castExprType->isPointerType() ? 1 : 0);
|
|
break;
|
|
case ACTC_retainable:
|
|
srcKind = (castExprType->isBlockPointerType() ? 2 : 3);
|
|
break;
|
|
case ACTC_indirectRetainable:
|
|
srcKind = 4;
|
|
break;
|
|
}
|
|
|
|
// Check whether this could be fixed with a bridge cast.
|
|
SourceLocation afterLParen = S.PP.getLocForEndOfToken(castRange.getBegin());
|
|
SourceLocation noteLoc = afterLParen.isValid() ? afterLParen : loc;
|
|
|
|
// Bridge from an ARC type to a CF type.
|
|
if (castACTC == ACTC_retainable && isAnyRetainable(exprACTC)) {
|
|
|
|
S.Diag(loc, diag::err_arc_cast_requires_bridge)
|
|
<< unsigned(CCK == Sema::CCK_ImplicitConversion) // cast|implicit
|
|
<< 2 // of C pointer type
|
|
<< castExprType
|
|
<< unsigned(castType->isBlockPointerType()) // to ObjC|block type
|
|
<< castType
|
|
<< castRange
|
|
<< castExpr->getSourceRange();
|
|
bool br = S.isKnownName("CFBridgingRelease");
|
|
DiagnosticBuilder DiagB = S.Diag(br ? castExpr->getExprLoc() : noteLoc,
|
|
diag::note_arc_bridge_transfer)
|
|
<< castExprType << br;
|
|
addFixitForObjCARCConversion(S, DiagB, CCK, afterLParen,
|
|
castType, castExpr, "__bridge_transfer ",
|
|
br ? "CFBridgingRelease" : 0);
|
|
|
|
return;
|
|
}
|
|
|
|
// Bridge from a CF type to an ARC type.
|
|
if (exprACTC == ACTC_retainable && isAnyRetainable(castACTC)) {
|
|
bool br = S.isKnownName("CFBridgingRetain");
|
|
S.Diag(loc, diag::err_arc_cast_requires_bridge)
|
|
<< unsigned(CCK == Sema::CCK_ImplicitConversion) // cast|implicit
|
|
<< unsigned(castExprType->isBlockPointerType()) // of ObjC|block type
|
|
<< castExprType
|
|
<< 2 // to C pointer type
|
|
<< castType
|
|
<< castRange
|
|
<< castExpr->getSourceRange();
|
|
DiagnosticBuilder DiagB = S.Diag(br ? castExpr->getExprLoc() : noteLoc,
|
|
diag::note_arc_bridge_retained)
|
|
<< castType << br;
|
|
addFixitForObjCARCConversion(S, DiagB, CCK, afterLParen,
|
|
castType, castExpr, "__bridge_retained ",
|
|
br ? "CFBridgingRetain" : 0);
|
|
|
|
return;
|
|
}
|
|
|
|
S.Diag(loc, diag::err_arc_mismatched_cast)
|
|
<< (CCK != Sema::CCK_ImplicitConversion)
|
|
<< srcKind << castExprType << castType
|
|
<< castRange << castExpr->getSourceRange();
|
|
}
|
|
|
|
Sema::ARCConversionResult
|
|
Sema::CheckObjCARCConversion(SourceRange castRange, QualType castType,
|
|
Expr *&castExpr, CheckedConversionKind CCK) {
|
|
QualType castExprType = castExpr->getType();
|
|
|
|
// For the purposes of the classification, we assume reference types
|
|
// will bind to temporaries.
|
|
QualType effCastType = castType;
|
|
if (const ReferenceType *ref = castType->getAs<ReferenceType>())
|
|
effCastType = ref->getPointeeType();
|
|
|
|
ARCConversionTypeClass exprACTC = classifyTypeForARCConversion(castExprType);
|
|
ARCConversionTypeClass castACTC = classifyTypeForARCConversion(effCastType);
|
|
if (exprACTC == castACTC) {
|
|
// check for viablity and report error if casting an rvalue to a
|
|
// life-time qualifier.
|
|
if ((castACTC == ACTC_retainable) &&
|
|
(CCK == CCK_CStyleCast || CCK == CCK_OtherCast) &&
|
|
(castType != castExprType)) {
|
|
const Type *DT = castType.getTypePtr();
|
|
QualType QDT = castType;
|
|
// We desugar some types but not others. We ignore those
|
|
// that cannot happen in a cast; i.e. auto, and those which
|
|
// should not be de-sugared; i.e typedef.
|
|
if (const ParenType *PT = dyn_cast<ParenType>(DT))
|
|
QDT = PT->desugar();
|
|
else if (const TypeOfType *TP = dyn_cast<TypeOfType>(DT))
|
|
QDT = TP->desugar();
|
|
else if (const AttributedType *AT = dyn_cast<AttributedType>(DT))
|
|
QDT = AT->desugar();
|
|
if (QDT != castType &&
|
|
QDT.getObjCLifetime() != Qualifiers::OCL_None) {
|
|
SourceLocation loc =
|
|
(castRange.isValid() ? castRange.getBegin()
|
|
: castExpr->getExprLoc());
|
|
Diag(loc, diag::err_arc_nolifetime_behavior);
|
|
}
|
|
}
|
|
return ACR_okay;
|
|
}
|
|
|
|
if (isAnyCLike(exprACTC) && isAnyCLike(castACTC)) return ACR_okay;
|
|
|
|
// Allow all of these types to be cast to integer types (but not
|
|
// vice-versa).
|
|
if (castACTC == ACTC_none && castType->isIntegralType(Context))
|
|
return ACR_okay;
|
|
|
|
// Allow casts between pointers to lifetime types (e.g., __strong id*)
|
|
// and pointers to void (e.g., cv void *). Casting from void* to lifetime*
|
|
// must be explicit.
|
|
if (exprACTC == ACTC_indirectRetainable && castACTC == ACTC_voidPtr)
|
|
return ACR_okay;
|
|
if (castACTC == ACTC_indirectRetainable && exprACTC == ACTC_voidPtr &&
|
|
CCK != CCK_ImplicitConversion)
|
|
return ACR_okay;
|
|
|
|
switch (ARCCastChecker(Context, exprACTC, castACTC).Visit(castExpr)) {
|
|
// For invalid casts, fall through.
|
|
case ACC_invalid:
|
|
break;
|
|
|
|
// Do nothing for both bottom and +0.
|
|
case ACC_bottom:
|
|
case ACC_plusZero:
|
|
return ACR_okay;
|
|
|
|
// If the result is +1, consume it here.
|
|
case ACC_plusOne:
|
|
castExpr = ImplicitCastExpr::Create(Context, castExpr->getType(),
|
|
CK_ARCConsumeObject, castExpr,
|
|
0, VK_RValue);
|
|
ExprNeedsCleanups = true;
|
|
return ACR_okay;
|
|
}
|
|
|
|
// If this is a non-implicit cast from id or block type to a
|
|
// CoreFoundation type, delay complaining in case the cast is used
|
|
// in an acceptable context.
|
|
if (exprACTC == ACTC_retainable && isAnyRetainable(castACTC) &&
|
|
CCK != CCK_ImplicitConversion)
|
|
return ACR_unbridged;
|
|
|
|
diagnoseObjCARCConversion(*this, castRange, castType, castACTC,
|
|
castExpr, exprACTC, CCK);
|
|
return ACR_okay;
|
|
}
|
|
|
|
/// Given that we saw an expression with the ARCUnbridgedCastTy
|
|
/// placeholder type, complain bitterly.
|
|
void Sema::diagnoseARCUnbridgedCast(Expr *e) {
|
|
// We expect the spurious ImplicitCastExpr to already have been stripped.
|
|
assert(!e->hasPlaceholderType(BuiltinType::ARCUnbridgedCast));
|
|
CastExpr *realCast = cast<CastExpr>(e->IgnoreParens());
|
|
|
|
SourceRange castRange;
|
|
QualType castType;
|
|
CheckedConversionKind CCK;
|
|
|
|
if (CStyleCastExpr *cast = dyn_cast<CStyleCastExpr>(realCast)) {
|
|
castRange = SourceRange(cast->getLParenLoc(), cast->getRParenLoc());
|
|
castType = cast->getTypeAsWritten();
|
|
CCK = CCK_CStyleCast;
|
|
} else if (ExplicitCastExpr *cast = dyn_cast<ExplicitCastExpr>(realCast)) {
|
|
castRange = cast->getTypeInfoAsWritten()->getTypeLoc().getSourceRange();
|
|
castType = cast->getTypeAsWritten();
|
|
CCK = CCK_OtherCast;
|
|
} else {
|
|
castType = cast->getType();
|
|
CCK = CCK_ImplicitConversion;
|
|
}
|
|
|
|
ARCConversionTypeClass castACTC =
|
|
classifyTypeForARCConversion(castType.getNonReferenceType());
|
|
|
|
Expr *castExpr = realCast->getSubExpr();
|
|
assert(classifyTypeForARCConversion(castExpr->getType()) == ACTC_retainable);
|
|
|
|
diagnoseObjCARCConversion(*this, castRange, castType, castACTC,
|
|
castExpr, ACTC_retainable, CCK);
|
|
}
|
|
|
|
/// stripARCUnbridgedCast - Given an expression of ARCUnbridgedCast
|
|
/// type, remove the placeholder cast.
|
|
Expr *Sema::stripARCUnbridgedCast(Expr *e) {
|
|
assert(e->hasPlaceholderType(BuiltinType::ARCUnbridgedCast));
|
|
|
|
if (ParenExpr *pe = dyn_cast<ParenExpr>(e)) {
|
|
Expr *sub = stripARCUnbridgedCast(pe->getSubExpr());
|
|
return new (Context) ParenExpr(pe->getLParen(), pe->getRParen(), sub);
|
|
} else if (UnaryOperator *uo = dyn_cast<UnaryOperator>(e)) {
|
|
assert(uo->getOpcode() == UO_Extension);
|
|
Expr *sub = stripARCUnbridgedCast(uo->getSubExpr());
|
|
return new (Context) UnaryOperator(sub, UO_Extension, sub->getType(),
|
|
sub->getValueKind(), sub->getObjectKind(),
|
|
uo->getOperatorLoc());
|
|
} else if (GenericSelectionExpr *gse = dyn_cast<GenericSelectionExpr>(e)) {
|
|
assert(!gse->isResultDependent());
|
|
|
|
unsigned n = gse->getNumAssocs();
|
|
SmallVector<Expr*, 4> subExprs(n);
|
|
SmallVector<TypeSourceInfo*, 4> subTypes(n);
|
|
for (unsigned i = 0; i != n; ++i) {
|
|
subTypes[i] = gse->getAssocTypeSourceInfo(i);
|
|
Expr *sub = gse->getAssocExpr(i);
|
|
if (i == gse->getResultIndex())
|
|
sub = stripARCUnbridgedCast(sub);
|
|
subExprs[i] = sub;
|
|
}
|
|
|
|
return new (Context) GenericSelectionExpr(Context, gse->getGenericLoc(),
|
|
gse->getControllingExpr(),
|
|
subTypes.data(), subExprs.data(),
|
|
n, gse->getDefaultLoc(),
|
|
gse->getRParenLoc(),
|
|
gse->containsUnexpandedParameterPack(),
|
|
gse->getResultIndex());
|
|
} else {
|
|
assert(isa<ImplicitCastExpr>(e) && "bad form of unbridged cast!");
|
|
return cast<ImplicitCastExpr>(e)->getSubExpr();
|
|
}
|
|
}
|
|
|
|
bool Sema::CheckObjCARCUnavailableWeakConversion(QualType castType,
|
|
QualType exprType) {
|
|
QualType canCastType =
|
|
Context.getCanonicalType(castType).getUnqualifiedType();
|
|
QualType canExprType =
|
|
Context.getCanonicalType(exprType).getUnqualifiedType();
|
|
if (isa<ObjCObjectPointerType>(canCastType) &&
|
|
castType.getObjCLifetime() == Qualifiers::OCL_Weak &&
|
|
canExprType->isObjCObjectPointerType()) {
|
|
if (const ObjCObjectPointerType *ObjT =
|
|
canExprType->getAs<ObjCObjectPointerType>())
|
|
if (ObjT->getInterfaceDecl()->isArcWeakrefUnavailable())
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// Look for an ObjCReclaimReturnedObject cast and destroy it.
|
|
static Expr *maybeUndoReclaimObject(Expr *e) {
|
|
// For now, we just undo operands that are *immediately* reclaim
|
|
// expressions, which prevents the vast majority of potential
|
|
// problems here. To catch them all, we'd need to rebuild arbitrary
|
|
// value-propagating subexpressions --- we can't reliably rebuild
|
|
// in-place because of expression sharing.
|
|
if (ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
|
|
if (ice->getCastKind() == CK_ARCReclaimReturnedObject)
|
|
return ice->getSubExpr();
|
|
|
|
return e;
|
|
}
|
|
|
|
ExprResult Sema::BuildObjCBridgedCast(SourceLocation LParenLoc,
|
|
ObjCBridgeCastKind Kind,
|
|
SourceLocation BridgeKeywordLoc,
|
|
TypeSourceInfo *TSInfo,
|
|
Expr *SubExpr) {
|
|
ExprResult SubResult = UsualUnaryConversions(SubExpr);
|
|
if (SubResult.isInvalid()) return ExprError();
|
|
SubExpr = SubResult.take();
|
|
|
|
QualType T = TSInfo->getType();
|
|
QualType FromType = SubExpr->getType();
|
|
|
|
CastKind CK;
|
|
|
|
bool MustConsume = false;
|
|
if (T->isDependentType() || SubExpr->isTypeDependent()) {
|
|
// Okay: we'll build a dependent expression type.
|
|
CK = CK_Dependent;
|
|
} else if (T->isObjCARCBridgableType() && FromType->isCARCBridgableType()) {
|
|
// Casting CF -> id
|
|
CK = (T->isBlockPointerType() ? CK_AnyPointerToBlockPointerCast
|
|
: CK_CPointerToObjCPointerCast);
|
|
switch (Kind) {
|
|
case OBC_Bridge:
|
|
break;
|
|
|
|
case OBC_BridgeRetained: {
|
|
bool br = isKnownName("CFBridgingRelease");
|
|
Diag(BridgeKeywordLoc, diag::err_arc_bridge_cast_wrong_kind)
|
|
<< 2
|
|
<< FromType
|
|
<< (T->isBlockPointerType()? 1 : 0)
|
|
<< T
|
|
<< SubExpr->getSourceRange()
|
|
<< Kind;
|
|
Diag(BridgeKeywordLoc, diag::note_arc_bridge)
|
|
<< FixItHint::CreateReplacement(BridgeKeywordLoc, "__bridge");
|
|
Diag(BridgeKeywordLoc, diag::note_arc_bridge_transfer)
|
|
<< FromType << br
|
|
<< FixItHint::CreateReplacement(BridgeKeywordLoc,
|
|
br ? "CFBridgingRelease "
|
|
: "__bridge_transfer ");
|
|
|
|
Kind = OBC_Bridge;
|
|
break;
|
|
}
|
|
|
|
case OBC_BridgeTransfer:
|
|
// We must consume the Objective-C object produced by the cast.
|
|
MustConsume = true;
|
|
break;
|
|
}
|
|
} else if (T->isCARCBridgableType() && FromType->isObjCARCBridgableType()) {
|
|
// Okay: id -> CF
|
|
CK = CK_BitCast;
|
|
switch (Kind) {
|
|
case OBC_Bridge:
|
|
// Reclaiming a value that's going to be __bridge-casted to CF
|
|
// is very dangerous, so we don't do it.
|
|
SubExpr = maybeUndoReclaimObject(SubExpr);
|
|
break;
|
|
|
|
case OBC_BridgeRetained:
|
|
// Produce the object before casting it.
|
|
SubExpr = ImplicitCastExpr::Create(Context, FromType,
|
|
CK_ARCProduceObject,
|
|
SubExpr, 0, VK_RValue);
|
|
break;
|
|
|
|
case OBC_BridgeTransfer: {
|
|
bool br = isKnownName("CFBridgingRetain");
|
|
Diag(BridgeKeywordLoc, diag::err_arc_bridge_cast_wrong_kind)
|
|
<< (FromType->isBlockPointerType()? 1 : 0)
|
|
<< FromType
|
|
<< 2
|
|
<< T
|
|
<< SubExpr->getSourceRange()
|
|
<< Kind;
|
|
|
|
Diag(BridgeKeywordLoc, diag::note_arc_bridge)
|
|
<< FixItHint::CreateReplacement(BridgeKeywordLoc, "__bridge ");
|
|
Diag(BridgeKeywordLoc, diag::note_arc_bridge_retained)
|
|
<< T << br
|
|
<< FixItHint::CreateReplacement(BridgeKeywordLoc,
|
|
br ? "CFBridgingRetain " : "__bridge_retained");
|
|
|
|
Kind = OBC_Bridge;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
Diag(LParenLoc, diag::err_arc_bridge_cast_incompatible)
|
|
<< FromType << T << Kind
|
|
<< SubExpr->getSourceRange()
|
|
<< TSInfo->getTypeLoc().getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
Expr *Result = new (Context) ObjCBridgedCastExpr(LParenLoc, Kind, CK,
|
|
BridgeKeywordLoc,
|
|
TSInfo, SubExpr);
|
|
|
|
if (MustConsume) {
|
|
ExprNeedsCleanups = true;
|
|
Result = ImplicitCastExpr::Create(Context, T, CK_ARCConsumeObject, Result,
|
|
0, VK_RValue);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
ExprResult Sema::ActOnObjCBridgedCast(Scope *S,
|
|
SourceLocation LParenLoc,
|
|
ObjCBridgeCastKind Kind,
|
|
SourceLocation BridgeKeywordLoc,
|
|
ParsedType Type,
|
|
SourceLocation RParenLoc,
|
|
Expr *SubExpr) {
|
|
TypeSourceInfo *TSInfo = 0;
|
|
QualType T = GetTypeFromParser(Type, &TSInfo);
|
|
if (!TSInfo)
|
|
TSInfo = Context.getTrivialTypeSourceInfo(T, LParenLoc);
|
|
return BuildObjCBridgedCast(LParenLoc, Kind, BridgeKeywordLoc, TSInfo,
|
|
SubExpr);
|
|
}
|