1601 lines
61 KiB
C++
1601 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,
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const ObjCPropertyRefExpr *PRE) {
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if (PRE->isObjectReceiver()) {
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const ObjCObjectPointerType *PT =
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PRE->getBase()->getType()->castAs<ObjCObjectPointerType>();
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// Special case for 'self' in class method implementations.
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if (PT->isObjCClassType() &&
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S.isSelfExpr(const_cast<Expr*>(PRE->getBase()))) {
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// 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);
|
|
}
|
|
}
|