f785676f2a
all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month
1602 lines
61 KiB
C++
1602 lines
61 KiB
C++
//===--- SemaPseudoObject.cpp - Semantic Analysis for Pseudo-Objects ------===//
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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 expressions involving
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// pseudo-object references. Pseudo-objects are conceptual objects
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// whose storage is entirely abstract and all accesses to which are
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// translated through some sort of abstraction barrier.
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//
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// For example, Objective-C objects can have "properties", either
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// declared or undeclared. A property may be accessed by writing
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// expr.prop
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// where 'expr' is an r-value of Objective-C pointer type and 'prop'
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// is the name of the property. If this expression is used in a context
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// needing an r-value, it is treated as if it were a message-send
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// of the associated 'getter' selector, typically:
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// [expr prop]
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// If it is used as the LHS of a simple assignment, it is treated
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// as a message-send of the associated 'setter' selector, typically:
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// [expr setProp: RHS]
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// If it is used as the LHS of a compound assignment, or the operand
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// of a unary increment or decrement, both are required; for example,
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// 'expr.prop *= 100' would be translated to:
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// [expr setProp: [expr prop] * 100]
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Sema/SemaInternal.h"
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#include "clang/AST/ExprObjC.h"
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#include "clang/Basic/CharInfo.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Sema/Initialization.h"
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#include "clang/Sema/ScopeInfo.h"
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#include "llvm/ADT/SmallString.h"
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using namespace clang;
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using namespace sema;
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namespace {
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// Basically just a very focused copy of TreeTransform.
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template <class T> struct Rebuilder {
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Sema &S;
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Rebuilder(Sema &S) : S(S) {}
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T &getDerived() { return static_cast<T&>(*this); }
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Expr *rebuild(Expr *e) {
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// Fast path: nothing to look through.
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if (typename T::specific_type *specific
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= dyn_cast<typename T::specific_type>(e))
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return getDerived().rebuildSpecific(specific);
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// Otherwise, we should look through and rebuild anything that
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// IgnoreParens would.
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if (ParenExpr *parens = dyn_cast<ParenExpr>(e)) {
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e = rebuild(parens->getSubExpr());
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return new (S.Context) ParenExpr(parens->getLParen(),
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parens->getRParen(),
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e);
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}
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if (UnaryOperator *uop = dyn_cast<UnaryOperator>(e)) {
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assert(uop->getOpcode() == UO_Extension);
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e = rebuild(uop->getSubExpr());
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return new (S.Context) UnaryOperator(e, uop->getOpcode(),
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uop->getType(),
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uop->getValueKind(),
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uop->getObjectKind(),
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uop->getOperatorLoc());
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}
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if (GenericSelectionExpr *gse = dyn_cast<GenericSelectionExpr>(e)) {
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assert(!gse->isResultDependent());
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unsigned resultIndex = gse->getResultIndex();
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unsigned numAssocs = gse->getNumAssocs();
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SmallVector<Expr*, 8> assocs(numAssocs);
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SmallVector<TypeSourceInfo*, 8> assocTypes(numAssocs);
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for (unsigned i = 0; i != numAssocs; ++i) {
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Expr *assoc = gse->getAssocExpr(i);
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if (i == resultIndex) assoc = rebuild(assoc);
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assocs[i] = assoc;
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assocTypes[i] = gse->getAssocTypeSourceInfo(i);
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}
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return new (S.Context) GenericSelectionExpr(S.Context,
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gse->getGenericLoc(),
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gse->getControllingExpr(),
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assocTypes,
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assocs,
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gse->getDefaultLoc(),
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gse->getRParenLoc(),
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gse->containsUnexpandedParameterPack(),
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resultIndex);
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}
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if (ChooseExpr *ce = dyn_cast<ChooseExpr>(e)) {
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assert(!ce->isConditionDependent());
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Expr *LHS = ce->getLHS(), *RHS = ce->getRHS();
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Expr *&rebuiltExpr = ce->isConditionTrue() ? LHS : RHS;
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rebuiltExpr = rebuild(rebuiltExpr);
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return new (S.Context) ChooseExpr(ce->getBuiltinLoc(),
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ce->getCond(),
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LHS, RHS,
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rebuiltExpr->getType(),
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rebuiltExpr->getValueKind(),
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rebuiltExpr->getObjectKind(),
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ce->getRParenLoc(),
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ce->isConditionTrue(),
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rebuiltExpr->isTypeDependent(),
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rebuiltExpr->isValueDependent());
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}
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llvm_unreachable("bad expression to rebuild!");
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}
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};
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struct ObjCPropertyRefRebuilder : Rebuilder<ObjCPropertyRefRebuilder> {
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Expr *NewBase;
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ObjCPropertyRefRebuilder(Sema &S, Expr *newBase)
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: Rebuilder<ObjCPropertyRefRebuilder>(S), NewBase(newBase) {}
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typedef ObjCPropertyRefExpr specific_type;
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Expr *rebuildSpecific(ObjCPropertyRefExpr *refExpr) {
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// Fortunately, the constraint that we're rebuilding something
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// with a base limits the number of cases here.
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assert(refExpr->isObjectReceiver());
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if (refExpr->isExplicitProperty()) {
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return new (S.Context)
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ObjCPropertyRefExpr(refExpr->getExplicitProperty(),
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refExpr->getType(), refExpr->getValueKind(),
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refExpr->getObjectKind(), refExpr->getLocation(),
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NewBase);
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}
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return new (S.Context)
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ObjCPropertyRefExpr(refExpr->getImplicitPropertyGetter(),
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refExpr->getImplicitPropertySetter(),
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refExpr->getType(), refExpr->getValueKind(),
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refExpr->getObjectKind(),refExpr->getLocation(),
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NewBase);
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}
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};
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struct ObjCSubscriptRefRebuilder : Rebuilder<ObjCSubscriptRefRebuilder> {
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Expr *NewBase;
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Expr *NewKeyExpr;
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ObjCSubscriptRefRebuilder(Sema &S, Expr *newBase, Expr *newKeyExpr)
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: Rebuilder<ObjCSubscriptRefRebuilder>(S),
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NewBase(newBase), NewKeyExpr(newKeyExpr) {}
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typedef ObjCSubscriptRefExpr specific_type;
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Expr *rebuildSpecific(ObjCSubscriptRefExpr *refExpr) {
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assert(refExpr->getBaseExpr());
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assert(refExpr->getKeyExpr());
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return new (S.Context)
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ObjCSubscriptRefExpr(NewBase,
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NewKeyExpr,
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refExpr->getType(), refExpr->getValueKind(),
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refExpr->getObjectKind(),refExpr->getAtIndexMethodDecl(),
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refExpr->setAtIndexMethodDecl(),
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refExpr->getRBracket());
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}
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};
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struct MSPropertyRefRebuilder : Rebuilder<MSPropertyRefRebuilder> {
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Expr *NewBase;
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MSPropertyRefRebuilder(Sema &S, Expr *newBase)
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: Rebuilder<MSPropertyRefRebuilder>(S), NewBase(newBase) {}
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typedef MSPropertyRefExpr specific_type;
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Expr *rebuildSpecific(MSPropertyRefExpr *refExpr) {
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assert(refExpr->getBaseExpr());
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return new (S.Context)
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MSPropertyRefExpr(NewBase, refExpr->getPropertyDecl(),
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refExpr->isArrow(), refExpr->getType(),
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refExpr->getValueKind(), refExpr->getQualifierLoc(),
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refExpr->getMemberLoc());
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}
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};
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class PseudoOpBuilder {
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public:
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Sema &S;
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unsigned ResultIndex;
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SourceLocation GenericLoc;
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SmallVector<Expr *, 4> Semantics;
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PseudoOpBuilder(Sema &S, SourceLocation genericLoc)
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: S(S), ResultIndex(PseudoObjectExpr::NoResult),
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GenericLoc(genericLoc) {}
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virtual ~PseudoOpBuilder() {}
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/// Add a normal semantic expression.
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void addSemanticExpr(Expr *semantic) {
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Semantics.push_back(semantic);
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}
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/// Add the 'result' semantic expression.
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void addResultSemanticExpr(Expr *resultExpr) {
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assert(ResultIndex == PseudoObjectExpr::NoResult);
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ResultIndex = Semantics.size();
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Semantics.push_back(resultExpr);
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}
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ExprResult buildRValueOperation(Expr *op);
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ExprResult buildAssignmentOperation(Scope *Sc,
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SourceLocation opLoc,
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BinaryOperatorKind opcode,
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Expr *LHS, Expr *RHS);
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ExprResult buildIncDecOperation(Scope *Sc, SourceLocation opLoc,
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UnaryOperatorKind opcode,
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Expr *op);
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virtual ExprResult complete(Expr *syntacticForm);
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OpaqueValueExpr *capture(Expr *op);
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OpaqueValueExpr *captureValueAsResult(Expr *op);
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void setResultToLastSemantic() {
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assert(ResultIndex == PseudoObjectExpr::NoResult);
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ResultIndex = Semantics.size() - 1;
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}
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/// Return true if assignments have a non-void result.
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bool CanCaptureValueOfType(QualType ty) {
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assert(!ty->isIncompleteType());
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assert(!ty->isDependentType());
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if (const CXXRecordDecl *ClassDecl = ty->getAsCXXRecordDecl())
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return ClassDecl->isTriviallyCopyable();
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return true;
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}
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virtual Expr *rebuildAndCaptureObject(Expr *) = 0;
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virtual ExprResult buildGet() = 0;
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virtual ExprResult buildSet(Expr *, SourceLocation,
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bool captureSetValueAsResult) = 0;
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};
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/// A PseudoOpBuilder for Objective-C \@properties.
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class ObjCPropertyOpBuilder : public PseudoOpBuilder {
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ObjCPropertyRefExpr *RefExpr;
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ObjCPropertyRefExpr *SyntacticRefExpr;
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OpaqueValueExpr *InstanceReceiver;
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ObjCMethodDecl *Getter;
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ObjCMethodDecl *Setter;
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Selector SetterSelector;
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Selector GetterSelector;
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public:
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ObjCPropertyOpBuilder(Sema &S, ObjCPropertyRefExpr *refExpr) :
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PseudoOpBuilder(S, refExpr->getLocation()), RefExpr(refExpr),
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SyntacticRefExpr(0), InstanceReceiver(0), Getter(0), Setter(0) {
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}
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ExprResult buildRValueOperation(Expr *op);
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ExprResult buildAssignmentOperation(Scope *Sc,
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SourceLocation opLoc,
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BinaryOperatorKind opcode,
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Expr *LHS, Expr *RHS);
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ExprResult buildIncDecOperation(Scope *Sc, SourceLocation opLoc,
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UnaryOperatorKind opcode,
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Expr *op);
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bool tryBuildGetOfReference(Expr *op, ExprResult &result);
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bool findSetter(bool warn=true);
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bool findGetter();
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Expr *rebuildAndCaptureObject(Expr *syntacticBase);
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ExprResult buildGet();
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ExprResult buildSet(Expr *op, SourceLocation, bool);
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ExprResult complete(Expr *SyntacticForm);
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bool isWeakProperty() const;
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};
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/// A PseudoOpBuilder for Objective-C array/dictionary indexing.
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class ObjCSubscriptOpBuilder : public PseudoOpBuilder {
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ObjCSubscriptRefExpr *RefExpr;
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OpaqueValueExpr *InstanceBase;
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OpaqueValueExpr *InstanceKey;
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ObjCMethodDecl *AtIndexGetter;
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Selector AtIndexGetterSelector;
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ObjCMethodDecl *AtIndexSetter;
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Selector AtIndexSetterSelector;
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public:
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ObjCSubscriptOpBuilder(Sema &S, ObjCSubscriptRefExpr *refExpr) :
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PseudoOpBuilder(S, refExpr->getSourceRange().getBegin()),
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RefExpr(refExpr),
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InstanceBase(0), InstanceKey(0),
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AtIndexGetter(0), AtIndexSetter(0) { }
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ExprResult buildRValueOperation(Expr *op);
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ExprResult buildAssignmentOperation(Scope *Sc,
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SourceLocation opLoc,
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BinaryOperatorKind opcode,
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Expr *LHS, Expr *RHS);
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Expr *rebuildAndCaptureObject(Expr *syntacticBase);
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bool findAtIndexGetter();
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bool findAtIndexSetter();
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ExprResult buildGet();
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ExprResult buildSet(Expr *op, SourceLocation, bool);
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};
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class MSPropertyOpBuilder : public PseudoOpBuilder {
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MSPropertyRefExpr *RefExpr;
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public:
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MSPropertyOpBuilder(Sema &S, MSPropertyRefExpr *refExpr) :
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PseudoOpBuilder(S, refExpr->getSourceRange().getBegin()),
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RefExpr(refExpr) {}
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Expr *rebuildAndCaptureObject(Expr *);
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ExprResult buildGet();
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ExprResult buildSet(Expr *op, SourceLocation, bool);
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};
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}
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/// Capture the given expression in an OpaqueValueExpr.
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OpaqueValueExpr *PseudoOpBuilder::capture(Expr *e) {
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// Make a new OVE whose source is the given expression.
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OpaqueValueExpr *captured =
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new (S.Context) OpaqueValueExpr(GenericLoc, e->getType(),
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e->getValueKind(), e->getObjectKind(),
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e);
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// Make sure we bind that in the semantics.
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addSemanticExpr(captured);
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return captured;
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}
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/// Capture the given expression as the result of this pseudo-object
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/// operation. This routine is safe against expressions which may
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/// already be captured.
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///
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/// \returns the captured expression, which will be the
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/// same as the input if the input was already captured
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OpaqueValueExpr *PseudoOpBuilder::captureValueAsResult(Expr *e) {
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assert(ResultIndex == PseudoObjectExpr::NoResult);
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// If the expression hasn't already been captured, just capture it
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// and set the new semantic
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if (!isa<OpaqueValueExpr>(e)) {
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OpaqueValueExpr *cap = capture(e);
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setResultToLastSemantic();
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return cap;
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}
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// Otherwise, it must already be one of our semantic expressions;
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// set ResultIndex to its index.
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unsigned index = 0;
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for (;; ++index) {
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assert(index < Semantics.size() &&
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"captured expression not found in semantics!");
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if (e == Semantics[index]) break;
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}
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ResultIndex = index;
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return cast<OpaqueValueExpr>(e);
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}
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/// The routine which creates the final PseudoObjectExpr.
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ExprResult PseudoOpBuilder::complete(Expr *syntactic) {
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return PseudoObjectExpr::Create(S.Context, syntactic,
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Semantics, ResultIndex);
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}
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/// The main skeleton for building an r-value operation.
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ExprResult PseudoOpBuilder::buildRValueOperation(Expr *op) {
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Expr *syntacticBase = rebuildAndCaptureObject(op);
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ExprResult getExpr = buildGet();
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if (getExpr.isInvalid()) return ExprError();
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addResultSemanticExpr(getExpr.take());
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return complete(syntacticBase);
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}
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/// The basic skeleton for building a simple or compound
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/// assignment operation.
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ExprResult
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PseudoOpBuilder::buildAssignmentOperation(Scope *Sc, SourceLocation opcLoc,
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BinaryOperatorKind opcode,
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Expr *LHS, Expr *RHS) {
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assert(BinaryOperator::isAssignmentOp(opcode));
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Expr *syntacticLHS = rebuildAndCaptureObject(LHS);
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OpaqueValueExpr *capturedRHS = capture(RHS);
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Expr *syntactic;
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ExprResult result;
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if (opcode == BO_Assign) {
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result = capturedRHS;
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syntactic = new (S.Context) BinaryOperator(syntacticLHS, capturedRHS,
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opcode, capturedRHS->getType(),
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capturedRHS->getValueKind(),
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OK_Ordinary, opcLoc, false);
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} else {
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ExprResult opLHS = buildGet();
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if (opLHS.isInvalid()) return ExprError();
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// Build an ordinary, non-compound operation.
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BinaryOperatorKind nonCompound =
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BinaryOperator::getOpForCompoundAssignment(opcode);
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result = S.BuildBinOp(Sc, opcLoc, nonCompound,
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opLHS.take(), capturedRHS);
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if (result.isInvalid()) return ExprError();
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syntactic =
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new (S.Context) CompoundAssignOperator(syntacticLHS, capturedRHS, opcode,
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result.get()->getType(),
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result.get()->getValueKind(),
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OK_Ordinary,
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opLHS.get()->getType(),
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result.get()->getType(),
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opcLoc, false);
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}
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// The result of the assignment, if not void, is the value set into
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// the l-value.
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result = buildSet(result.take(), opcLoc, /*captureSetValueAsResult*/ true);
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if (result.isInvalid()) return ExprError();
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addSemanticExpr(result.take());
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return complete(syntactic);
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}
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/// The basic skeleton for building an increment or decrement
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/// operation.
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ExprResult
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PseudoOpBuilder::buildIncDecOperation(Scope *Sc, SourceLocation opcLoc,
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UnaryOperatorKind opcode,
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Expr *op) {
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assert(UnaryOperator::isIncrementDecrementOp(opcode));
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Expr *syntacticOp = rebuildAndCaptureObject(op);
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// Load the value.
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ExprResult result = buildGet();
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if (result.isInvalid()) return ExprError();
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QualType resultType = result.get()->getType();
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// That's the postfix result.
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if (UnaryOperator::isPostfix(opcode) &&
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(result.get()->isTypeDependent() || CanCaptureValueOfType(resultType))) {
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result = capture(result.take());
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setResultToLastSemantic();
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}
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// Add or subtract a literal 1.
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llvm::APInt oneV(S.Context.getTypeSize(S.Context.IntTy), 1);
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Expr *one = IntegerLiteral::Create(S.Context, oneV, S.Context.IntTy,
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GenericLoc);
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if (UnaryOperator::isIncrementOp(opcode)) {
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result = S.BuildBinOp(Sc, opcLoc, BO_Add, result.take(), one);
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} else {
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result = S.BuildBinOp(Sc, opcLoc, BO_Sub, result.take(), one);
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}
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if (result.isInvalid()) return ExprError();
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// Store that back into the result. The value stored is the result
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// of a prefix operation.
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result = buildSet(result.take(), opcLoc, UnaryOperator::isPrefix(opcode));
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if (result.isInvalid()) return ExprError();
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addSemanticExpr(result.take());
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UnaryOperator *syntactic =
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new (S.Context) UnaryOperator(syntacticOp, opcode, resultType,
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VK_LValue, OK_Ordinary, opcLoc);
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return complete(syntactic);
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}
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//===----------------------------------------------------------------------===//
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|
// Objective-C @property and implicit property references
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//===----------------------------------------------------------------------===//
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|
|
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/// Look up a method in the receiver type of an Objective-C property
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/// reference.
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|
static ObjCMethodDecl *LookupMethodInReceiverType(Sema &S, Selector sel,
|
|
const ObjCPropertyRefExpr *PRE) {
|
|
if (PRE->isObjectReceiver()) {
|
|
const ObjCObjectPointerType *PT =
|
|
PRE->getBase()->getType()->castAs<ObjCObjectPointerType>();
|
|
|
|
// Special case for 'self' in class method implementations.
|
|
if (PT->isObjCClassType() &&
|
|
S.isSelfExpr(const_cast<Expr*>(PRE->getBase()))) {
|
|
// This cast is safe because isSelfExpr is only true within
|
|
// methods.
|
|
ObjCMethodDecl *method =
|
|
cast<ObjCMethodDecl>(S.CurContext->getNonClosureAncestor());
|
|
return S.LookupMethodInObjectType(sel,
|
|
S.Context.getObjCInterfaceType(method->getClassInterface()),
|
|
/*instance*/ false);
|
|
}
|
|
|
|
return S.LookupMethodInObjectType(sel, PT->getPointeeType(), true);
|
|
}
|
|
|
|
if (PRE->isSuperReceiver()) {
|
|
if (const ObjCObjectPointerType *PT =
|
|
PRE->getSuperReceiverType()->getAs<ObjCObjectPointerType>())
|
|
return S.LookupMethodInObjectType(sel, PT->getPointeeType(), true);
|
|
|
|
return S.LookupMethodInObjectType(sel, PRE->getSuperReceiverType(), false);
|
|
}
|
|
|
|
assert(PRE->isClassReceiver() && "Invalid expression");
|
|
QualType IT = S.Context.getObjCInterfaceType(PRE->getClassReceiver());
|
|
return S.LookupMethodInObjectType(sel, IT, false);
|
|
}
|
|
|
|
bool ObjCPropertyOpBuilder::isWeakProperty() const {
|
|
QualType T;
|
|
if (RefExpr->isExplicitProperty()) {
|
|
const ObjCPropertyDecl *Prop = RefExpr->getExplicitProperty();
|
|
if (Prop->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_weak)
|
|
return true;
|
|
|
|
T = Prop->getType();
|
|
} else if (Getter) {
|
|
T = Getter->getResultType();
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
return T.getObjCLifetime() == Qualifiers::OCL_Weak;
|
|
}
|
|
|
|
bool ObjCPropertyOpBuilder::findGetter() {
|
|
if (Getter) return true;
|
|
|
|
// For implicit properties, just trust the lookup we already did.
|
|
if (RefExpr->isImplicitProperty()) {
|
|
if ((Getter = RefExpr->getImplicitPropertyGetter())) {
|
|
GetterSelector = Getter->getSelector();
|
|
return true;
|
|
}
|
|
else {
|
|
// Must build the getter selector the hard way.
|
|
ObjCMethodDecl *setter = RefExpr->getImplicitPropertySetter();
|
|
assert(setter && "both setter and getter are null - cannot happen");
|
|
IdentifierInfo *setterName =
|
|
setter->getSelector().getIdentifierInfoForSlot(0);
|
|
const char *compStr = setterName->getNameStart();
|
|
compStr += 3;
|
|
IdentifierInfo *getterName = &S.Context.Idents.get(compStr);
|
|
GetterSelector =
|
|
S.PP.getSelectorTable().getNullarySelector(getterName);
|
|
return false;
|
|
|
|
}
|
|
}
|
|
|
|
ObjCPropertyDecl *prop = RefExpr->getExplicitProperty();
|
|
Getter = LookupMethodInReceiverType(S, prop->getGetterName(), RefExpr);
|
|
return (Getter != 0);
|
|
}
|
|
|
|
/// Try to find the most accurate setter declaration for the property
|
|
/// reference.
|
|
///
|
|
/// \return true if a setter was found, in which case Setter
|
|
bool ObjCPropertyOpBuilder::findSetter(bool warn) {
|
|
// For implicit properties, just trust the lookup we already did.
|
|
if (RefExpr->isImplicitProperty()) {
|
|
if (ObjCMethodDecl *setter = RefExpr->getImplicitPropertySetter()) {
|
|
Setter = setter;
|
|
SetterSelector = setter->getSelector();
|
|
return true;
|
|
} else {
|
|
IdentifierInfo *getterName =
|
|
RefExpr->getImplicitPropertyGetter()->getSelector()
|
|
.getIdentifierInfoForSlot(0);
|
|
SetterSelector =
|
|
SelectorTable::constructSetterSelector(S.PP.getIdentifierTable(),
|
|
S.PP.getSelectorTable(),
|
|
getterName);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// For explicit properties, this is more involved.
|
|
ObjCPropertyDecl *prop = RefExpr->getExplicitProperty();
|
|
SetterSelector = prop->getSetterName();
|
|
|
|
// Do a normal method lookup first.
|
|
if (ObjCMethodDecl *setter =
|
|
LookupMethodInReceiverType(S, SetterSelector, RefExpr)) {
|
|
if (setter->isPropertyAccessor() && warn)
|
|
if (const ObjCInterfaceDecl *IFace =
|
|
dyn_cast<ObjCInterfaceDecl>(setter->getDeclContext())) {
|
|
const StringRef thisPropertyName(prop->getName());
|
|
// Try flipping the case of the first character.
|
|
char front = thisPropertyName.front();
|
|
front = isLowercase(front) ? toUppercase(front) : toLowercase(front);
|
|
SmallString<100> PropertyName = thisPropertyName;
|
|
PropertyName[0] = front;
|
|
IdentifierInfo *AltMember = &S.PP.getIdentifierTable().get(PropertyName);
|
|
if (ObjCPropertyDecl *prop1 = IFace->FindPropertyDeclaration(AltMember))
|
|
if (prop != prop1 && (prop1->getSetterMethodDecl() == setter)) {
|
|
S.Diag(RefExpr->getExprLoc(), diag::error_property_setter_ambiguous_use)
|
|
<< prop->getName() << prop1->getName() << setter->getSelector();
|
|
S.Diag(prop->getLocation(), diag::note_property_declare);
|
|
S.Diag(prop1->getLocation(), diag::note_property_declare);
|
|
}
|
|
}
|
|
Setter = setter;
|
|
return true;
|
|
}
|
|
|
|
// That can fail in the somewhat crazy situation that we're
|
|
// type-checking a message send within the @interface declaration
|
|
// that declared the @property. But it's not clear that that's
|
|
// valuable to support.
|
|
|
|
return false;
|
|
}
|
|
|
|
/// Capture the base object of an Objective-C property expression.
|
|
Expr *ObjCPropertyOpBuilder::rebuildAndCaptureObject(Expr *syntacticBase) {
|
|
assert(InstanceReceiver == 0);
|
|
|
|
// If we have a base, capture it in an OVE and rebuild the syntactic
|
|
// form to use the OVE as its base.
|
|
if (RefExpr->isObjectReceiver()) {
|
|
InstanceReceiver = capture(RefExpr->getBase());
|
|
|
|
syntacticBase =
|
|
ObjCPropertyRefRebuilder(S, InstanceReceiver).rebuild(syntacticBase);
|
|
}
|
|
|
|
if (ObjCPropertyRefExpr *
|
|
refE = dyn_cast<ObjCPropertyRefExpr>(syntacticBase->IgnoreParens()))
|
|
SyntacticRefExpr = refE;
|
|
|
|
return syntacticBase;
|
|
}
|
|
|
|
/// Load from an Objective-C property reference.
|
|
ExprResult ObjCPropertyOpBuilder::buildGet() {
|
|
findGetter();
|
|
assert(Getter);
|
|
|
|
if (SyntacticRefExpr)
|
|
SyntacticRefExpr->setIsMessagingGetter();
|
|
|
|
QualType receiverType;
|
|
if (RefExpr->isClassReceiver()) {
|
|
receiverType = S.Context.getObjCInterfaceType(RefExpr->getClassReceiver());
|
|
} else if (RefExpr->isSuperReceiver()) {
|
|
receiverType = RefExpr->getSuperReceiverType();
|
|
} else {
|
|
assert(InstanceReceiver);
|
|
receiverType = InstanceReceiver->getType();
|
|
}
|
|
|
|
// Build a message-send.
|
|
ExprResult msg;
|
|
if (Getter->isInstanceMethod() || RefExpr->isObjectReceiver()) {
|
|
assert(InstanceReceiver || RefExpr->isSuperReceiver());
|
|
msg = S.BuildInstanceMessageImplicit(InstanceReceiver, receiverType,
|
|
GenericLoc, Getter->getSelector(),
|
|
Getter, None);
|
|
} else {
|
|
msg = S.BuildClassMessageImplicit(receiverType, RefExpr->isSuperReceiver(),
|
|
GenericLoc, Getter->getSelector(),
|
|
Getter, None);
|
|
}
|
|
return msg;
|
|
}
|
|
|
|
/// Store to an Objective-C property reference.
|
|
///
|
|
/// \param captureSetValueAsResult If true, capture the actual
|
|
/// value being set as the value of the property operation.
|
|
ExprResult ObjCPropertyOpBuilder::buildSet(Expr *op, SourceLocation opcLoc,
|
|
bool captureSetValueAsResult) {
|
|
bool hasSetter = findSetter(false);
|
|
assert(hasSetter); (void) hasSetter;
|
|
|
|
if (SyntacticRefExpr)
|
|
SyntacticRefExpr->setIsMessagingSetter();
|
|
|
|
QualType receiverType;
|
|
if (RefExpr->isClassReceiver()) {
|
|
receiverType = S.Context.getObjCInterfaceType(RefExpr->getClassReceiver());
|
|
} else if (RefExpr->isSuperReceiver()) {
|
|
receiverType = RefExpr->getSuperReceiverType();
|
|
} else {
|
|
assert(InstanceReceiver);
|
|
receiverType = InstanceReceiver->getType();
|
|
}
|
|
|
|
// Use assignment constraints when possible; they give us better
|
|
// diagnostics. "When possible" basically means anything except a
|
|
// C++ class type.
|
|
if (!S.getLangOpts().CPlusPlus || !op->getType()->isRecordType()) {
|
|
QualType paramType = (*Setter->param_begin())->getType();
|
|
if (!S.getLangOpts().CPlusPlus || !paramType->isRecordType()) {
|
|
ExprResult opResult = op;
|
|
Sema::AssignConvertType assignResult
|
|
= S.CheckSingleAssignmentConstraints(paramType, opResult);
|
|
if (S.DiagnoseAssignmentResult(assignResult, opcLoc, paramType,
|
|
op->getType(), opResult.get(),
|
|
Sema::AA_Assigning))
|
|
return ExprError();
|
|
|
|
op = opResult.take();
|
|
assert(op && "successful assignment left argument invalid?");
|
|
}
|
|
else if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(op)) {
|
|
Expr *Initializer = OVE->getSourceExpr();
|
|
// passing C++11 style initialized temporaries to objc++ properties
|
|
// requires special treatment by removing OpaqueValueExpr so type
|
|
// conversion takes place and adding the OpaqueValueExpr later on.
|
|
if (isa<InitListExpr>(Initializer) &&
|
|
Initializer->getType()->isVoidType()) {
|
|
op = Initializer;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Arguments.
|
|
Expr *args[] = { op };
|
|
|
|
// Build a message-send.
|
|
ExprResult msg;
|
|
if (Setter->isInstanceMethod() || RefExpr->isObjectReceiver()) {
|
|
msg = S.BuildInstanceMessageImplicit(InstanceReceiver, receiverType,
|
|
GenericLoc, SetterSelector, Setter,
|
|
MultiExprArg(args, 1));
|
|
} else {
|
|
msg = S.BuildClassMessageImplicit(receiverType, RefExpr->isSuperReceiver(),
|
|
GenericLoc,
|
|
SetterSelector, Setter,
|
|
MultiExprArg(args, 1));
|
|
}
|
|
|
|
if (!msg.isInvalid() && captureSetValueAsResult) {
|
|
ObjCMessageExpr *msgExpr =
|
|
cast<ObjCMessageExpr>(msg.get()->IgnoreImplicit());
|
|
Expr *arg = msgExpr->getArg(0);
|
|
if (CanCaptureValueOfType(arg->getType()))
|
|
msgExpr->setArg(0, captureValueAsResult(arg));
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
/// @property-specific behavior for doing lvalue-to-rvalue conversion.
|
|
ExprResult ObjCPropertyOpBuilder::buildRValueOperation(Expr *op) {
|
|
// Explicit properties always have getters, but implicit ones don't.
|
|
// Check that before proceeding.
|
|
if (RefExpr->isImplicitProperty() && !RefExpr->getImplicitPropertyGetter()) {
|
|
S.Diag(RefExpr->getLocation(), diag::err_getter_not_found)
|
|
<< RefExpr->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
ExprResult result = PseudoOpBuilder::buildRValueOperation(op);
|
|
if (result.isInvalid()) return ExprError();
|
|
|
|
if (RefExpr->isExplicitProperty() && !Getter->hasRelatedResultType())
|
|
S.DiagnosePropertyAccessorMismatch(RefExpr->getExplicitProperty(),
|
|
Getter, RefExpr->getLocation());
|
|
|
|
// As a special case, if the method returns 'id', try to get
|
|
// a better type from the property.
|
|
if (RefExpr->isExplicitProperty() && result.get()->isRValue() &&
|
|
result.get()->getType()->isObjCIdType()) {
|
|
QualType propType = RefExpr->getExplicitProperty()->getType();
|
|
if (const ObjCObjectPointerType *ptr
|
|
= propType->getAs<ObjCObjectPointerType>()) {
|
|
if (!ptr->isObjCIdType())
|
|
result = S.ImpCastExprToType(result.get(), propType, CK_BitCast);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/// Try to build this as a call to a getter that returns a reference.
|
|
///
|
|
/// \return true if it was possible, whether or not it actually
|
|
/// succeeded
|
|
bool ObjCPropertyOpBuilder::tryBuildGetOfReference(Expr *op,
|
|
ExprResult &result) {
|
|
if (!S.getLangOpts().CPlusPlus) return false;
|
|
|
|
findGetter();
|
|
assert(Getter && "property has no setter and no getter!");
|
|
|
|
// Only do this if the getter returns an l-value reference type.
|
|
QualType resultType = Getter->getResultType();
|
|
if (!resultType->isLValueReferenceType()) return false;
|
|
|
|
result = buildRValueOperation(op);
|
|
return true;
|
|
}
|
|
|
|
/// @property-specific behavior for doing assignments.
|
|
ExprResult
|
|
ObjCPropertyOpBuilder::buildAssignmentOperation(Scope *Sc,
|
|
SourceLocation opcLoc,
|
|
BinaryOperatorKind opcode,
|
|
Expr *LHS, Expr *RHS) {
|
|
assert(BinaryOperator::isAssignmentOp(opcode));
|
|
|
|
// If there's no setter, we have no choice but to try to assign to
|
|
// the result of the getter.
|
|
if (!findSetter()) {
|
|
ExprResult result;
|
|
if (tryBuildGetOfReference(LHS, result)) {
|
|
if (result.isInvalid()) return ExprError();
|
|
return S.BuildBinOp(Sc, opcLoc, opcode, result.take(), RHS);
|
|
}
|
|
|
|
// Otherwise, it's an error.
|
|
S.Diag(opcLoc, diag::err_nosetter_property_assignment)
|
|
<< unsigned(RefExpr->isImplicitProperty())
|
|
<< SetterSelector
|
|
<< LHS->getSourceRange() << RHS->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
// If there is a setter, we definitely want to use it.
|
|
|
|
// Verify that we can do a compound assignment.
|
|
if (opcode != BO_Assign && !findGetter()) {
|
|
S.Diag(opcLoc, diag::err_nogetter_property_compound_assignment)
|
|
<< LHS->getSourceRange() << RHS->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
ExprResult result =
|
|
PseudoOpBuilder::buildAssignmentOperation(Sc, opcLoc, opcode, LHS, RHS);
|
|
if (result.isInvalid()) return ExprError();
|
|
|
|
// Various warnings about property assignments in ARC.
|
|
if (S.getLangOpts().ObjCAutoRefCount && InstanceReceiver) {
|
|
S.checkRetainCycles(InstanceReceiver->getSourceExpr(), RHS);
|
|
S.checkUnsafeExprAssigns(opcLoc, LHS, RHS);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/// @property-specific behavior for doing increments and decrements.
|
|
ExprResult
|
|
ObjCPropertyOpBuilder::buildIncDecOperation(Scope *Sc, SourceLocation opcLoc,
|
|
UnaryOperatorKind opcode,
|
|
Expr *op) {
|
|
// If there's no setter, we have no choice but to try to assign to
|
|
// the result of the getter.
|
|
if (!findSetter()) {
|
|
ExprResult result;
|
|
if (tryBuildGetOfReference(op, result)) {
|
|
if (result.isInvalid()) return ExprError();
|
|
return S.BuildUnaryOp(Sc, opcLoc, opcode, result.take());
|
|
}
|
|
|
|
// Otherwise, it's an error.
|
|
S.Diag(opcLoc, diag::err_nosetter_property_incdec)
|
|
<< unsigned(RefExpr->isImplicitProperty())
|
|
<< unsigned(UnaryOperator::isDecrementOp(opcode))
|
|
<< SetterSelector
|
|
<< op->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
// If there is a setter, we definitely want to use it.
|
|
|
|
// We also need a getter.
|
|
if (!findGetter()) {
|
|
assert(RefExpr->isImplicitProperty());
|
|
S.Diag(opcLoc, diag::err_nogetter_property_incdec)
|
|
<< unsigned(UnaryOperator::isDecrementOp(opcode))
|
|
<< GetterSelector
|
|
<< op->getSourceRange();
|
|
return ExprError();
|
|
}
|
|
|
|
return PseudoOpBuilder::buildIncDecOperation(Sc, opcLoc, opcode, op);
|
|
}
|
|
|
|
ExprResult ObjCPropertyOpBuilder::complete(Expr *SyntacticForm) {
|
|
if (S.getLangOpts().ObjCAutoRefCount && isWeakProperty()) {
|
|
DiagnosticsEngine::Level Level =
|
|
S.Diags.getDiagnosticLevel(diag::warn_arc_repeated_use_of_weak,
|
|
SyntacticForm->getLocStart());
|
|
if (Level != DiagnosticsEngine::Ignored)
|
|
S.recordUseOfEvaluatedWeak(SyntacticRefExpr,
|
|
SyntacticRefExpr->isMessagingGetter());
|
|
}
|
|
|
|
return PseudoOpBuilder::complete(SyntacticForm);
|
|
}
|
|
|
|
// ObjCSubscript build stuff.
|
|
//
|
|
|
|
/// objective-c subscripting-specific behavior for doing lvalue-to-rvalue
|
|
/// conversion.
|
|
/// FIXME. Remove this routine if it is proven that no additional
|
|
/// specifity is needed.
|
|
ExprResult ObjCSubscriptOpBuilder::buildRValueOperation(Expr *op) {
|
|
ExprResult result = PseudoOpBuilder::buildRValueOperation(op);
|
|
if (result.isInvalid()) return ExprError();
|
|
return result;
|
|
}
|
|
|
|
/// objective-c subscripting-specific behavior for doing assignments.
|
|
ExprResult
|
|
ObjCSubscriptOpBuilder::buildAssignmentOperation(Scope *Sc,
|
|
SourceLocation opcLoc,
|
|
BinaryOperatorKind opcode,
|
|
Expr *LHS, Expr *RHS) {
|
|
assert(BinaryOperator::isAssignmentOp(opcode));
|
|
// There must be a method to do the Index'ed assignment.
|
|
if (!findAtIndexSetter())
|
|
return ExprError();
|
|
|
|
// Verify that we can do a compound assignment.
|
|
if (opcode != BO_Assign && !findAtIndexGetter())
|
|
return ExprError();
|
|
|
|
ExprResult result =
|
|
PseudoOpBuilder::buildAssignmentOperation(Sc, opcLoc, opcode, LHS, RHS);
|
|
if (result.isInvalid()) return ExprError();
|
|
|
|
// Various warnings about objc Index'ed assignments in ARC.
|
|
if (S.getLangOpts().ObjCAutoRefCount && InstanceBase) {
|
|
S.checkRetainCycles(InstanceBase->getSourceExpr(), RHS);
|
|
S.checkUnsafeExprAssigns(opcLoc, LHS, RHS);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/// Capture the base object of an Objective-C Index'ed expression.
|
|
Expr *ObjCSubscriptOpBuilder::rebuildAndCaptureObject(Expr *syntacticBase) {
|
|
assert(InstanceBase == 0);
|
|
|
|
// Capture base expression in an OVE and rebuild the syntactic
|
|
// form to use the OVE as its base expression.
|
|
InstanceBase = capture(RefExpr->getBaseExpr());
|
|
InstanceKey = capture(RefExpr->getKeyExpr());
|
|
|
|
syntacticBase =
|
|
ObjCSubscriptRefRebuilder(S, InstanceBase,
|
|
InstanceKey).rebuild(syntacticBase);
|
|
|
|
return syntacticBase;
|
|
}
|
|
|
|
/// CheckSubscriptingKind - This routine decide what type
|
|
/// of indexing represented by "FromE" is being done.
|
|
Sema::ObjCSubscriptKind
|
|
Sema::CheckSubscriptingKind(Expr *FromE) {
|
|
// If the expression already has integral or enumeration type, we're golden.
|
|
QualType T = FromE->getType();
|
|
if (T->isIntegralOrEnumerationType())
|
|
return OS_Array;
|
|
|
|
// If we don't have a class type in C++, there's no way we can get an
|
|
// expression of integral or enumeration type.
|
|
const RecordType *RecordTy = T->getAs<RecordType>();
|
|
if (!RecordTy && T->isObjCObjectPointerType())
|
|
// All other scalar cases are assumed to be dictionary indexing which
|
|
// caller handles, with diagnostics if needed.
|
|
return OS_Dictionary;
|
|
if (!getLangOpts().CPlusPlus ||
|
|
!RecordTy || RecordTy->isIncompleteType()) {
|
|
// No indexing can be done. Issue diagnostics and quit.
|
|
const Expr *IndexExpr = FromE->IgnoreParenImpCasts();
|
|
if (isa<StringLiteral>(IndexExpr))
|
|
Diag(FromE->getExprLoc(), diag::err_objc_subscript_pointer)
|
|
<< T << FixItHint::CreateInsertion(FromE->getExprLoc(), "@");
|
|
else
|
|
Diag(FromE->getExprLoc(), diag::err_objc_subscript_type_conversion)
|
|
<< T;
|
|
return OS_Error;
|
|
}
|
|
|
|
// We must have a complete class type.
|
|
if (RequireCompleteType(FromE->getExprLoc(), T,
|
|
diag::err_objc_index_incomplete_class_type, FromE))
|
|
return OS_Error;
|
|
|
|
// Look for a conversion to an integral, enumeration type, or
|
|
// objective-C pointer type.
|
|
UnresolvedSet<4> ViableConversions;
|
|
UnresolvedSet<4> ExplicitConversions;
|
|
std::pair<CXXRecordDecl::conversion_iterator,
|
|
CXXRecordDecl::conversion_iterator> Conversions
|
|
= cast<CXXRecordDecl>(RecordTy->getDecl())->getVisibleConversionFunctions();
|
|
|
|
int NoIntegrals=0, NoObjCIdPointers=0;
|
|
SmallVector<CXXConversionDecl *, 4> ConversionDecls;
|
|
|
|
for (CXXRecordDecl::conversion_iterator
|
|
I = Conversions.first, E = Conversions.second; I != E; ++I) {
|
|
if (CXXConversionDecl *Conversion
|
|
= dyn_cast<CXXConversionDecl>((*I)->getUnderlyingDecl())) {
|
|
QualType CT = Conversion->getConversionType().getNonReferenceType();
|
|
if (CT->isIntegralOrEnumerationType()) {
|
|
++NoIntegrals;
|
|
ConversionDecls.push_back(Conversion);
|
|
}
|
|
else if (CT->isObjCIdType() ||CT->isBlockPointerType()) {
|
|
++NoObjCIdPointers;
|
|
ConversionDecls.push_back(Conversion);
|
|
}
|
|
}
|
|
}
|
|
if (NoIntegrals ==1 && NoObjCIdPointers == 0)
|
|
return OS_Array;
|
|
if (NoIntegrals == 0 && NoObjCIdPointers == 1)
|
|
return OS_Dictionary;
|
|
if (NoIntegrals == 0 && NoObjCIdPointers == 0) {
|
|
// No conversion function was found. Issue diagnostic and return.
|
|
Diag(FromE->getExprLoc(), diag::err_objc_subscript_type_conversion)
|
|
<< FromE->getType();
|
|
return OS_Error;
|
|
}
|
|
Diag(FromE->getExprLoc(), diag::err_objc_multiple_subscript_type_conversion)
|
|
<< FromE->getType();
|
|
for (unsigned int i = 0; i < ConversionDecls.size(); i++)
|
|
Diag(ConversionDecls[i]->getLocation(), diag::not_conv_function_declared_at);
|
|
|
|
return OS_Error;
|
|
}
|
|
|
|
/// CheckKeyForObjCARCConversion - This routine suggests bridge casting of CF
|
|
/// objects used as dictionary subscript key objects.
|
|
static void CheckKeyForObjCARCConversion(Sema &S, QualType ContainerT,
|
|
Expr *Key) {
|
|
if (ContainerT.isNull())
|
|
return;
|
|
// dictionary subscripting.
|
|
// - (id)objectForKeyedSubscript:(id)key;
|
|
IdentifierInfo *KeyIdents[] = {
|
|
&S.Context.Idents.get("objectForKeyedSubscript")
|
|
};
|
|
Selector GetterSelector = S.Context.Selectors.getSelector(1, KeyIdents);
|
|
ObjCMethodDecl *Getter = S.LookupMethodInObjectType(GetterSelector, ContainerT,
|
|
true /*instance*/);
|
|
if (!Getter)
|
|
return;
|
|
QualType T = Getter->param_begin()[0]->getType();
|
|
S.CheckObjCARCConversion(Key->getSourceRange(),
|
|
T, Key, Sema::CCK_ImplicitConversion);
|
|
}
|
|
|
|
bool ObjCSubscriptOpBuilder::findAtIndexGetter() {
|
|
if (AtIndexGetter)
|
|
return true;
|
|
|
|
Expr *BaseExpr = RefExpr->getBaseExpr();
|
|
QualType BaseT = BaseExpr->getType();
|
|
|
|
QualType ResultType;
|
|
if (const ObjCObjectPointerType *PTy =
|
|
BaseT->getAs<ObjCObjectPointerType>()) {
|
|
ResultType = PTy->getPointeeType();
|
|
if (const ObjCObjectType *iQFaceTy =
|
|
ResultType->getAsObjCQualifiedInterfaceType())
|
|
ResultType = iQFaceTy->getBaseType();
|
|
}
|
|
Sema::ObjCSubscriptKind Res =
|
|
S.CheckSubscriptingKind(RefExpr->getKeyExpr());
|
|
if (Res == Sema::OS_Error) {
|
|
if (S.getLangOpts().ObjCAutoRefCount)
|
|
CheckKeyForObjCARCConversion(S, ResultType,
|
|
RefExpr->getKeyExpr());
|
|
return false;
|
|
}
|
|
bool arrayRef = (Res == Sema::OS_Array);
|
|
|
|
if (ResultType.isNull()) {
|
|
S.Diag(BaseExpr->getExprLoc(), diag::err_objc_subscript_base_type)
|
|
<< BaseExpr->getType() << arrayRef;
|
|
return false;
|
|
}
|
|
if (!arrayRef) {
|
|
// dictionary subscripting.
|
|
// - (id)objectForKeyedSubscript:(id)key;
|
|
IdentifierInfo *KeyIdents[] = {
|
|
&S.Context.Idents.get("objectForKeyedSubscript")
|
|
};
|
|
AtIndexGetterSelector = S.Context.Selectors.getSelector(1, KeyIdents);
|
|
}
|
|
else {
|
|
// - (id)objectAtIndexedSubscript:(size_t)index;
|
|
IdentifierInfo *KeyIdents[] = {
|
|
&S.Context.Idents.get("objectAtIndexedSubscript")
|
|
};
|
|
|
|
AtIndexGetterSelector = S.Context.Selectors.getSelector(1, KeyIdents);
|
|
}
|
|
|
|
AtIndexGetter = S.LookupMethodInObjectType(AtIndexGetterSelector, ResultType,
|
|
true /*instance*/);
|
|
bool receiverIdType = (BaseT->isObjCIdType() ||
|
|
BaseT->isObjCQualifiedIdType());
|
|
|
|
if (!AtIndexGetter && S.getLangOpts().DebuggerObjCLiteral) {
|
|
AtIndexGetter = ObjCMethodDecl::Create(S.Context, SourceLocation(),
|
|
SourceLocation(), AtIndexGetterSelector,
|
|
S.Context.getObjCIdType() /*ReturnType*/,
|
|
0 /*TypeSourceInfo */,
|
|
S.Context.getTranslationUnitDecl(),
|
|
true /*Instance*/, false/*isVariadic*/,
|
|
/*isPropertyAccessor=*/false,
|
|
/*isImplicitlyDeclared=*/true, /*isDefined=*/false,
|
|
ObjCMethodDecl::Required,
|
|
false);
|
|
ParmVarDecl *Argument = ParmVarDecl::Create(S.Context, AtIndexGetter,
|
|
SourceLocation(), SourceLocation(),
|
|
arrayRef ? &S.Context.Idents.get("index")
|
|
: &S.Context.Idents.get("key"),
|
|
arrayRef ? S.Context.UnsignedLongTy
|
|
: S.Context.getObjCIdType(),
|
|
/*TInfo=*/0,
|
|
SC_None,
|
|
0);
|
|
AtIndexGetter->setMethodParams(S.Context, Argument, None);
|
|
}
|
|
|
|
if (!AtIndexGetter) {
|
|
if (!receiverIdType) {
|
|
S.Diag(BaseExpr->getExprLoc(), diag::err_objc_subscript_method_not_found)
|
|
<< BaseExpr->getType() << 0 << arrayRef;
|
|
return false;
|
|
}
|
|
AtIndexGetter =
|
|
S.LookupInstanceMethodInGlobalPool(AtIndexGetterSelector,
|
|
RefExpr->getSourceRange(),
|
|
true, false);
|
|
}
|
|
|
|
if (AtIndexGetter) {
|
|
QualType T = AtIndexGetter->param_begin()[0]->getType();
|
|
if ((arrayRef && !T->isIntegralOrEnumerationType()) ||
|
|
(!arrayRef && !T->isObjCObjectPointerType())) {
|
|
S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
|
|
arrayRef ? diag::err_objc_subscript_index_type
|
|
: diag::err_objc_subscript_key_type) << T;
|
|
S.Diag(AtIndexGetter->param_begin()[0]->getLocation(),
|
|
diag::note_parameter_type) << T;
|
|
return false;
|
|
}
|
|
QualType R = AtIndexGetter->getResultType();
|
|
if (!R->isObjCObjectPointerType()) {
|
|
S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
|
|
diag::err_objc_indexing_method_result_type) << R << arrayRef;
|
|
S.Diag(AtIndexGetter->getLocation(), diag::note_method_declared_at) <<
|
|
AtIndexGetter->getDeclName();
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool ObjCSubscriptOpBuilder::findAtIndexSetter() {
|
|
if (AtIndexSetter)
|
|
return true;
|
|
|
|
Expr *BaseExpr = RefExpr->getBaseExpr();
|
|
QualType BaseT = BaseExpr->getType();
|
|
|
|
QualType ResultType;
|
|
if (const ObjCObjectPointerType *PTy =
|
|
BaseT->getAs<ObjCObjectPointerType>()) {
|
|
ResultType = PTy->getPointeeType();
|
|
if (const ObjCObjectType *iQFaceTy =
|
|
ResultType->getAsObjCQualifiedInterfaceType())
|
|
ResultType = iQFaceTy->getBaseType();
|
|
}
|
|
|
|
Sema::ObjCSubscriptKind Res =
|
|
S.CheckSubscriptingKind(RefExpr->getKeyExpr());
|
|
if (Res == Sema::OS_Error) {
|
|
if (S.getLangOpts().ObjCAutoRefCount)
|
|
CheckKeyForObjCARCConversion(S, ResultType,
|
|
RefExpr->getKeyExpr());
|
|
return false;
|
|
}
|
|
bool arrayRef = (Res == Sema::OS_Array);
|
|
|
|
if (ResultType.isNull()) {
|
|
S.Diag(BaseExpr->getExprLoc(), diag::err_objc_subscript_base_type)
|
|
<< BaseExpr->getType() << arrayRef;
|
|
return false;
|
|
}
|
|
|
|
if (!arrayRef) {
|
|
// dictionary subscripting.
|
|
// - (void)setObject:(id)object forKeyedSubscript:(id)key;
|
|
IdentifierInfo *KeyIdents[] = {
|
|
&S.Context.Idents.get("setObject"),
|
|
&S.Context.Idents.get("forKeyedSubscript")
|
|
};
|
|
AtIndexSetterSelector = S.Context.Selectors.getSelector(2, KeyIdents);
|
|
}
|
|
else {
|
|
// - (void)setObject:(id)object atIndexedSubscript:(NSInteger)index;
|
|
IdentifierInfo *KeyIdents[] = {
|
|
&S.Context.Idents.get("setObject"),
|
|
&S.Context.Idents.get("atIndexedSubscript")
|
|
};
|
|
AtIndexSetterSelector = S.Context.Selectors.getSelector(2, KeyIdents);
|
|
}
|
|
AtIndexSetter = S.LookupMethodInObjectType(AtIndexSetterSelector, ResultType,
|
|
true /*instance*/);
|
|
|
|
bool receiverIdType = (BaseT->isObjCIdType() ||
|
|
BaseT->isObjCQualifiedIdType());
|
|
|
|
if (!AtIndexSetter && S.getLangOpts().DebuggerObjCLiteral) {
|
|
TypeSourceInfo *ResultTInfo = 0;
|
|
QualType ReturnType = S.Context.VoidTy;
|
|
AtIndexSetter = ObjCMethodDecl::Create(S.Context, SourceLocation(),
|
|
SourceLocation(), AtIndexSetterSelector,
|
|
ReturnType,
|
|
ResultTInfo,
|
|
S.Context.getTranslationUnitDecl(),
|
|
true /*Instance*/, false/*isVariadic*/,
|
|
/*isPropertyAccessor=*/false,
|
|
/*isImplicitlyDeclared=*/true, /*isDefined=*/false,
|
|
ObjCMethodDecl::Required,
|
|
false);
|
|
SmallVector<ParmVarDecl *, 2> Params;
|
|
ParmVarDecl *object = ParmVarDecl::Create(S.Context, AtIndexSetter,
|
|
SourceLocation(), SourceLocation(),
|
|
&S.Context.Idents.get("object"),
|
|
S.Context.getObjCIdType(),
|
|
/*TInfo=*/0,
|
|
SC_None,
|
|
0);
|
|
Params.push_back(object);
|
|
ParmVarDecl *key = ParmVarDecl::Create(S.Context, AtIndexSetter,
|
|
SourceLocation(), SourceLocation(),
|
|
arrayRef ? &S.Context.Idents.get("index")
|
|
: &S.Context.Idents.get("key"),
|
|
arrayRef ? S.Context.UnsignedLongTy
|
|
: S.Context.getObjCIdType(),
|
|
/*TInfo=*/0,
|
|
SC_None,
|
|
0);
|
|
Params.push_back(key);
|
|
AtIndexSetter->setMethodParams(S.Context, Params, None);
|
|
}
|
|
|
|
if (!AtIndexSetter) {
|
|
if (!receiverIdType) {
|
|
S.Diag(BaseExpr->getExprLoc(),
|
|
diag::err_objc_subscript_method_not_found)
|
|
<< BaseExpr->getType() << 1 << arrayRef;
|
|
return false;
|
|
}
|
|
AtIndexSetter =
|
|
S.LookupInstanceMethodInGlobalPool(AtIndexSetterSelector,
|
|
RefExpr->getSourceRange(),
|
|
true, false);
|
|
}
|
|
|
|
bool err = false;
|
|
if (AtIndexSetter && arrayRef) {
|
|
QualType T = AtIndexSetter->param_begin()[1]->getType();
|
|
if (!T->isIntegralOrEnumerationType()) {
|
|
S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
|
|
diag::err_objc_subscript_index_type) << T;
|
|
S.Diag(AtIndexSetter->param_begin()[1]->getLocation(),
|
|
diag::note_parameter_type) << T;
|
|
err = true;
|
|
}
|
|
T = AtIndexSetter->param_begin()[0]->getType();
|
|
if (!T->isObjCObjectPointerType()) {
|
|
S.Diag(RefExpr->getBaseExpr()->getExprLoc(),
|
|
diag::err_objc_subscript_object_type) << T << arrayRef;
|
|
S.Diag(AtIndexSetter->param_begin()[0]->getLocation(),
|
|
diag::note_parameter_type) << T;
|
|
err = true;
|
|
}
|
|
}
|
|
else if (AtIndexSetter && !arrayRef)
|
|
for (unsigned i=0; i <2; i++) {
|
|
QualType T = AtIndexSetter->param_begin()[i]->getType();
|
|
if (!T->isObjCObjectPointerType()) {
|
|
if (i == 1)
|
|
S.Diag(RefExpr->getKeyExpr()->getExprLoc(),
|
|
diag::err_objc_subscript_key_type) << T;
|
|
else
|
|
S.Diag(RefExpr->getBaseExpr()->getExprLoc(),
|
|
diag::err_objc_subscript_dic_object_type) << T;
|
|
S.Diag(AtIndexSetter->param_begin()[i]->getLocation(),
|
|
diag::note_parameter_type) << T;
|
|
err = true;
|
|
}
|
|
}
|
|
|
|
return !err;
|
|
}
|
|
|
|
// Get the object at "Index" position in the container.
|
|
// [BaseExpr objectAtIndexedSubscript : IndexExpr];
|
|
ExprResult ObjCSubscriptOpBuilder::buildGet() {
|
|
if (!findAtIndexGetter())
|
|
return ExprError();
|
|
|
|
QualType receiverType = InstanceBase->getType();
|
|
|
|
// Build a message-send.
|
|
ExprResult msg;
|
|
Expr *Index = InstanceKey;
|
|
|
|
// Arguments.
|
|
Expr *args[] = { Index };
|
|
assert(InstanceBase);
|
|
msg = S.BuildInstanceMessageImplicit(InstanceBase, receiverType,
|
|
GenericLoc,
|
|
AtIndexGetterSelector, AtIndexGetter,
|
|
MultiExprArg(args, 1));
|
|
return msg;
|
|
}
|
|
|
|
/// Store into the container the "op" object at "Index"'ed location
|
|
/// by building this messaging expression:
|
|
/// - (void)setObject:(id)object atIndexedSubscript:(NSInteger)index;
|
|
/// \param captureSetValueAsResult If true, capture the actual
|
|
/// value being set as the value of the property operation.
|
|
ExprResult ObjCSubscriptOpBuilder::buildSet(Expr *op, SourceLocation opcLoc,
|
|
bool captureSetValueAsResult) {
|
|
if (!findAtIndexSetter())
|
|
return ExprError();
|
|
|
|
QualType receiverType = InstanceBase->getType();
|
|
Expr *Index = InstanceKey;
|
|
|
|
// Arguments.
|
|
Expr *args[] = { op, Index };
|
|
|
|
// Build a message-send.
|
|
ExprResult msg = S.BuildInstanceMessageImplicit(InstanceBase, receiverType,
|
|
GenericLoc,
|
|
AtIndexSetterSelector,
|
|
AtIndexSetter,
|
|
MultiExprArg(args, 2));
|
|
|
|
if (!msg.isInvalid() && captureSetValueAsResult) {
|
|
ObjCMessageExpr *msgExpr =
|
|
cast<ObjCMessageExpr>(msg.get()->IgnoreImplicit());
|
|
Expr *arg = msgExpr->getArg(0);
|
|
if (CanCaptureValueOfType(arg->getType()))
|
|
msgExpr->setArg(0, captureValueAsResult(arg));
|
|
}
|
|
|
|
return msg;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// MSVC __declspec(property) references
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
Expr *MSPropertyOpBuilder::rebuildAndCaptureObject(Expr *syntacticBase) {
|
|
Expr *NewBase = capture(RefExpr->getBaseExpr());
|
|
|
|
syntacticBase =
|
|
MSPropertyRefRebuilder(S, NewBase).rebuild(syntacticBase);
|
|
|
|
return syntacticBase;
|
|
}
|
|
|
|
ExprResult MSPropertyOpBuilder::buildGet() {
|
|
if (!RefExpr->getPropertyDecl()->hasGetter()) {
|
|
S.Diag(RefExpr->getMemberLoc(), diag::err_no_getter_for_property)
|
|
<< RefExpr->getPropertyDecl()->getName();
|
|
return ExprError();
|
|
}
|
|
|
|
UnqualifiedId GetterName;
|
|
IdentifierInfo *II = RefExpr->getPropertyDecl()->getGetterId();
|
|
GetterName.setIdentifier(II, RefExpr->getMemberLoc());
|
|
CXXScopeSpec SS;
|
|
SS.Adopt(RefExpr->getQualifierLoc());
|
|
ExprResult GetterExpr = S.ActOnMemberAccessExpr(
|
|
S.getCurScope(), RefExpr->getBaseExpr(), SourceLocation(),
|
|
RefExpr->isArrow() ? tok::arrow : tok::period, SS, SourceLocation(),
|
|
GetterName, 0, true);
|
|
if (GetterExpr.isInvalid()) {
|
|
S.Diag(RefExpr->getMemberLoc(), diag::error_cannot_find_suitable_getter)
|
|
<< RefExpr->getPropertyDecl()->getName();
|
|
return ExprError();
|
|
}
|
|
|
|
MultiExprArg ArgExprs;
|
|
return S.ActOnCallExpr(S.getCurScope(), GetterExpr.take(),
|
|
RefExpr->getSourceRange().getBegin(), ArgExprs,
|
|
RefExpr->getSourceRange().getEnd());
|
|
}
|
|
|
|
ExprResult MSPropertyOpBuilder::buildSet(Expr *op, SourceLocation sl,
|
|
bool captureSetValueAsResult) {
|
|
if (!RefExpr->getPropertyDecl()->hasSetter()) {
|
|
S.Diag(RefExpr->getMemberLoc(), diag::err_no_setter_for_property)
|
|
<< RefExpr->getPropertyDecl()->getName();
|
|
return ExprError();
|
|
}
|
|
|
|
UnqualifiedId SetterName;
|
|
IdentifierInfo *II = RefExpr->getPropertyDecl()->getSetterId();
|
|
SetterName.setIdentifier(II, RefExpr->getMemberLoc());
|
|
CXXScopeSpec SS;
|
|
SS.Adopt(RefExpr->getQualifierLoc());
|
|
ExprResult SetterExpr = S.ActOnMemberAccessExpr(
|
|
S.getCurScope(), RefExpr->getBaseExpr(), SourceLocation(),
|
|
RefExpr->isArrow() ? tok::arrow : tok::period, SS, SourceLocation(),
|
|
SetterName, 0, true);
|
|
if (SetterExpr.isInvalid()) {
|
|
S.Diag(RefExpr->getMemberLoc(), diag::error_cannot_find_suitable_setter)
|
|
<< RefExpr->getPropertyDecl()->getName();
|
|
return ExprError();
|
|
}
|
|
|
|
SmallVector<Expr*, 1> ArgExprs;
|
|
ArgExprs.push_back(op);
|
|
return S.ActOnCallExpr(S.getCurScope(), SetterExpr.take(),
|
|
RefExpr->getSourceRange().getBegin(), ArgExprs,
|
|
op->getSourceRange().getEnd());
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// General Sema routines.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
ExprResult Sema::checkPseudoObjectRValue(Expr *E) {
|
|
Expr *opaqueRef = E->IgnoreParens();
|
|
if (ObjCPropertyRefExpr *refExpr
|
|
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
|
|
ObjCPropertyOpBuilder builder(*this, refExpr);
|
|
return builder.buildRValueOperation(E);
|
|
}
|
|
else if (ObjCSubscriptRefExpr *refExpr
|
|
= dyn_cast<ObjCSubscriptRefExpr>(opaqueRef)) {
|
|
ObjCSubscriptOpBuilder builder(*this, refExpr);
|
|
return builder.buildRValueOperation(E);
|
|
} else if (MSPropertyRefExpr *refExpr
|
|
= dyn_cast<MSPropertyRefExpr>(opaqueRef)) {
|
|
MSPropertyOpBuilder builder(*this, refExpr);
|
|
return builder.buildRValueOperation(E);
|
|
} else {
|
|
llvm_unreachable("unknown pseudo-object kind!");
|
|
}
|
|
}
|
|
|
|
/// Check an increment or decrement of a pseudo-object expression.
|
|
ExprResult Sema::checkPseudoObjectIncDec(Scope *Sc, SourceLocation opcLoc,
|
|
UnaryOperatorKind opcode, Expr *op) {
|
|
// Do nothing if the operand is dependent.
|
|
if (op->isTypeDependent())
|
|
return new (Context) UnaryOperator(op, opcode, Context.DependentTy,
|
|
VK_RValue, OK_Ordinary, opcLoc);
|
|
|
|
assert(UnaryOperator::isIncrementDecrementOp(opcode));
|
|
Expr *opaqueRef = op->IgnoreParens();
|
|
if (ObjCPropertyRefExpr *refExpr
|
|
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
|
|
ObjCPropertyOpBuilder builder(*this, refExpr);
|
|
return builder.buildIncDecOperation(Sc, opcLoc, opcode, op);
|
|
} else if (isa<ObjCSubscriptRefExpr>(opaqueRef)) {
|
|
Diag(opcLoc, diag::err_illegal_container_subscripting_op);
|
|
return ExprError();
|
|
} else if (MSPropertyRefExpr *refExpr
|
|
= dyn_cast<MSPropertyRefExpr>(opaqueRef)) {
|
|
MSPropertyOpBuilder builder(*this, refExpr);
|
|
return builder.buildIncDecOperation(Sc, opcLoc, opcode, op);
|
|
} else {
|
|
llvm_unreachable("unknown pseudo-object kind!");
|
|
}
|
|
}
|
|
|
|
ExprResult Sema::checkPseudoObjectAssignment(Scope *S, SourceLocation opcLoc,
|
|
BinaryOperatorKind opcode,
|
|
Expr *LHS, Expr *RHS) {
|
|
// Do nothing if either argument is dependent.
|
|
if (LHS->isTypeDependent() || RHS->isTypeDependent())
|
|
return new (Context) BinaryOperator(LHS, RHS, opcode, Context.DependentTy,
|
|
VK_RValue, OK_Ordinary, opcLoc, false);
|
|
|
|
// Filter out non-overload placeholder types in the RHS.
|
|
if (RHS->getType()->isNonOverloadPlaceholderType()) {
|
|
ExprResult result = CheckPlaceholderExpr(RHS);
|
|
if (result.isInvalid()) return ExprError();
|
|
RHS = result.take();
|
|
}
|
|
|
|
Expr *opaqueRef = LHS->IgnoreParens();
|
|
if (ObjCPropertyRefExpr *refExpr
|
|
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
|
|
ObjCPropertyOpBuilder builder(*this, refExpr);
|
|
return builder.buildAssignmentOperation(S, opcLoc, opcode, LHS, RHS);
|
|
} else if (ObjCSubscriptRefExpr *refExpr
|
|
= dyn_cast<ObjCSubscriptRefExpr>(opaqueRef)) {
|
|
ObjCSubscriptOpBuilder builder(*this, refExpr);
|
|
return builder.buildAssignmentOperation(S, opcLoc, opcode, LHS, RHS);
|
|
} else if (MSPropertyRefExpr *refExpr
|
|
= dyn_cast<MSPropertyRefExpr>(opaqueRef)) {
|
|
MSPropertyOpBuilder builder(*this, refExpr);
|
|
return builder.buildAssignmentOperation(S, opcLoc, opcode, LHS, RHS);
|
|
} else {
|
|
llvm_unreachable("unknown pseudo-object kind!");
|
|
}
|
|
}
|
|
|
|
/// Given a pseudo-object reference, rebuild it without the opaque
|
|
/// values. Basically, undo the behavior of rebuildAndCaptureObject.
|
|
/// This should never operate in-place.
|
|
static Expr *stripOpaqueValuesFromPseudoObjectRef(Sema &S, Expr *E) {
|
|
Expr *opaqueRef = E->IgnoreParens();
|
|
if (ObjCPropertyRefExpr *refExpr
|
|
= dyn_cast<ObjCPropertyRefExpr>(opaqueRef)) {
|
|
// Class and super property references don't have opaque values in them.
|
|
if (refExpr->isClassReceiver() || refExpr->isSuperReceiver())
|
|
return E;
|
|
|
|
assert(refExpr->isObjectReceiver() && "Unknown receiver kind?");
|
|
OpaqueValueExpr *baseOVE = cast<OpaqueValueExpr>(refExpr->getBase());
|
|
return ObjCPropertyRefRebuilder(S, baseOVE->getSourceExpr()).rebuild(E);
|
|
} else if (ObjCSubscriptRefExpr *refExpr
|
|
= dyn_cast<ObjCSubscriptRefExpr>(opaqueRef)) {
|
|
OpaqueValueExpr *baseOVE = cast<OpaqueValueExpr>(refExpr->getBaseExpr());
|
|
OpaqueValueExpr *keyOVE = cast<OpaqueValueExpr>(refExpr->getKeyExpr());
|
|
return ObjCSubscriptRefRebuilder(S, baseOVE->getSourceExpr(),
|
|
keyOVE->getSourceExpr()).rebuild(E);
|
|
} else if (MSPropertyRefExpr *refExpr
|
|
= dyn_cast<MSPropertyRefExpr>(opaqueRef)) {
|
|
OpaqueValueExpr *baseOVE = cast<OpaqueValueExpr>(refExpr->getBaseExpr());
|
|
return MSPropertyRefRebuilder(S, baseOVE->getSourceExpr()).rebuild(E);
|
|
} else {
|
|
llvm_unreachable("unknown pseudo-object kind!");
|
|
}
|
|
}
|
|
|
|
/// Given a pseudo-object expression, recreate what it looks like
|
|
/// syntactically without the attendant OpaqueValueExprs.
|
|
///
|
|
/// This is a hack which should be removed when TreeTransform is
|
|
/// capable of rebuilding a tree without stripping implicit
|
|
/// operations.
|
|
Expr *Sema::recreateSyntacticForm(PseudoObjectExpr *E) {
|
|
Expr *syntax = E->getSyntacticForm();
|
|
if (UnaryOperator *uop = dyn_cast<UnaryOperator>(syntax)) {
|
|
Expr *op = stripOpaqueValuesFromPseudoObjectRef(*this, uop->getSubExpr());
|
|
return new (Context) UnaryOperator(op, uop->getOpcode(), uop->getType(),
|
|
uop->getValueKind(), uop->getObjectKind(),
|
|
uop->getOperatorLoc());
|
|
} else if (CompoundAssignOperator *cop
|
|
= dyn_cast<CompoundAssignOperator>(syntax)) {
|
|
Expr *lhs = stripOpaqueValuesFromPseudoObjectRef(*this, cop->getLHS());
|
|
Expr *rhs = cast<OpaqueValueExpr>(cop->getRHS())->getSourceExpr();
|
|
return new (Context) CompoundAssignOperator(lhs, rhs, cop->getOpcode(),
|
|
cop->getType(),
|
|
cop->getValueKind(),
|
|
cop->getObjectKind(),
|
|
cop->getComputationLHSType(),
|
|
cop->getComputationResultType(),
|
|
cop->getOperatorLoc(), false);
|
|
} else if (BinaryOperator *bop = dyn_cast<BinaryOperator>(syntax)) {
|
|
Expr *lhs = stripOpaqueValuesFromPseudoObjectRef(*this, bop->getLHS());
|
|
Expr *rhs = cast<OpaqueValueExpr>(bop->getRHS())->getSourceExpr();
|
|
return new (Context) BinaryOperator(lhs, rhs, bop->getOpcode(),
|
|
bop->getType(), bop->getValueKind(),
|
|
bop->getObjectKind(),
|
|
bop->getOperatorLoc(), false);
|
|
} else {
|
|
assert(syntax->hasPlaceholderType(BuiltinType::PseudoObject));
|
|
return stripOpaqueValuesFromPseudoObjectRef(*this, syntax);
|
|
}
|
|
}
|