bool CXXRecordDecl::hasConstCopyAssignment(ASTContext &Context,
const CXXMethodDecl *& MD) const {
QualType ClassType = Context.getCanonicalType(Context.getTypeDeclType(
const_cast<CXXRecordDecl*>(this)));
DeclarationName OpName =Context.DeclarationNames.getCXXOperatorName(OO_Equal);
DeclContext::lookup_const_iterator Op, OpEnd;
for (llvm::tie(Op, OpEnd) = this->lookup(OpName);
Op != OpEnd; ++Op) {
// C++ [class.copy]p9:
// A user-declared copy assignment operator is a non-static non-template
// member function of class X with exactly one parameter of type X, X&,
// const X&, volatile X& or const volatile X&.
const CXXMethodDecl* Method = dyn_cast<CXXMethodDecl>(*Op);
if (!Method)
continue;
if (Method->isStatic())
continue;
if (Method->getPrimaryTemplate())
continue;
const FunctionProtoType *FnType =
Method->getType()->getAs<FunctionProtoType>();
assert(FnType && "Overloaded operator has no prototype.");
// Don't assert on this; an invalid decl might have been left in the AST.
if (FnType->getNumArgs() != 1 || FnType->isVariadic())
continue;
bool AcceptsConst = true;
QualType ArgType = FnType->getArgType(0);
if (const LValueReferenceType *Ref = ArgType->getAs<LValueReferenceType>()) {
ArgType = Ref->getPointeeType();
// Is it a non-const lvalue reference?
if (!ArgType.isConstQualified())
AcceptsConst = false;
}
if (!Context.hasSameUnqualifiedType(ArgType, ClassType))
continue;
MD = Method;
// We have a single argument of type cv X or cv X&, i.e. we've found the
// copy assignment operator. Return whether it accepts const arguments.
return AcceptsConst;
}
assert(isInvalidDecl() &&
"No copy assignment operator declared in valid code.");
return false;
}
void CXXRecordDecl::addedAssignmentOperator(ASTContext &Context,
CXXMethodDecl *OpDecl) {
// We're interested specifically in copy assignment operators.
const FunctionProtoType *FnType = OpDecl->getType()->getAs<FunctionProtoType>();
assert(FnType && "Overloaded operator has no proto function type.");
assert(FnType->getNumArgs() == 1 && !FnType->isVariadic());
// Copy assignment operators must be non-templates.
if (OpDecl->getPrimaryTemplate() || OpDecl->getDescribedFunctionTemplate())
return;
QualType ArgType = FnType->getArgType(0);
if (const LValueReferenceType *Ref = ArgType->getAs<LValueReferenceType>())
ArgType = Ref->getPointeeType();
ArgType = ArgType.getUnqualifiedType();
QualType ClassType = Context.getCanonicalType(Context.getTypeDeclType(
const_cast<CXXRecordDecl*>(this)));
if (!Context.hasSameUnqualifiedType(ClassType, ArgType))
return;
// This is a copy assignment operator.
// Note on the decl that it is a copy assignment operator.
OpDecl->setCopyAssignment(true);
// Suppress the implicit declaration of a copy constructor.
data().UserDeclaredCopyAssignment = true;
data().DeclaredCopyAssignment = true;
// C++ [class.copy]p11:
// A copy assignment operator is trivial if it is implicitly declared.
// FIXME: C++0x: don't do this for "= default" copy operators.
data().HasTrivialCopyAssignment = false;
// C++ [class]p4:
// A POD-struct is an aggregate class that [...] has no user-defined copy
// assignment operator [...].
data().PlainOldData = false;
}
void ObjCMigrateASTConsumer::migrateObjCInterfaceDecl(ASTContext &Ctx,
ObjCInterfaceDecl *D) {
for (ObjCContainerDecl::method_iterator M = D->meth_begin(), MEnd = D->meth_end();
M != MEnd; ++M) {
ObjCMethodDecl *Method = (*M);
if (Method->isPropertyAccessor() || Method->param_size() != 0)
continue;
// Is this method candidate to be a getter?
QualType GRT = Method->getResultType();
if (GRT->isVoidType())
continue;
// FIXME. Don't know what todo with attributes, skip for now.
if (Method->hasAttrs())
continue;
Selector GetterSelector = Method->getSelector();
IdentifierInfo *getterName = GetterSelector.getIdentifierInfoForSlot(0);
Selector SetterSelector =
SelectorTable::constructSetterSelector(PP.getIdentifierTable(),
PP.getSelectorTable(),
getterName);
if (ObjCMethodDecl *SetterMethod = D->lookupMethod(SetterSelector, true)) {
// Is this a valid setter, matching the target getter?
QualType SRT = SetterMethod->getResultType();
if (!SRT->isVoidType())
continue;
const ParmVarDecl *argDecl = *SetterMethod->param_begin();
QualType ArgType = argDecl->getType();
if (!Ctx.hasSameUnqualifiedType(ArgType, GRT) ||
SetterMethod->hasAttrs())
continue;
edit::Commit commit(*Editor);
rewriteToObjCProperty(Method, SetterMethod, *NSAPIObj, commit);
Editor->commit(commit);
}
}
}
/// \brief The LoopFixer callback, which determines if loops discovered by the
/// matchers are convertible, printing information about the loops if so.
void LoopFixer::run(const MatchFinder::MatchResult &Result) {
const BoundNodes &Nodes = Result.Nodes;
Confidence ConfidenceLevel(RL_Safe);
ASTContext *Context = Result.Context;
const ForStmt *TheLoop = Nodes.getStmtAs<ForStmt>(LoopName);
if (!Owner.isFileModifiable(Context->getSourceManager(),TheLoop->getForLoc()))
return;
// Check that we have exactly one index variable and at most one end variable.
const VarDecl *LoopVar = Nodes.getDeclAs<VarDecl>(IncrementVarName);
const VarDecl *CondVar = Nodes.getDeclAs<VarDecl>(ConditionVarName);
const VarDecl *InitVar = Nodes.getDeclAs<VarDecl>(InitVarName);
if (!areSameVariable(LoopVar, CondVar) || !areSameVariable(LoopVar, InitVar))
return;
const VarDecl *EndVar = Nodes.getDeclAs<VarDecl>(EndVarName);
const VarDecl *ConditionEndVar =
Nodes.getDeclAs<VarDecl>(ConditionEndVarName);
if (EndVar && !areSameVariable(EndVar, ConditionEndVar))
return;
// If the end comparison isn't a variable, we can try to work with the
// expression the loop variable is being tested against instead.
const CXXMemberCallExpr *EndCall =
Nodes.getStmtAs<CXXMemberCallExpr>(EndCallName);
const Expr *BoundExpr = Nodes.getStmtAs<Expr>(ConditionBoundName);
// If the loop calls end()/size() after each iteration, lower our confidence
// level.
if (FixerKind != LFK_Array && !EndVar)
ConfidenceLevel.lowerTo(RL_Reasonable);
const Expr *ContainerExpr = nullptr;
bool DerefByValue = false;
bool DerefByConstRef = false;
bool ContainerNeedsDereference = false;
// FIXME: Try to put most of this logic inside a matcher. Currently, matchers
// don't allow the right-recursive checks in digThroughConstructors.
if (FixerKind == LFK_Iterator) {
ContainerExpr = findContainer(Context, LoopVar->getInit(),
EndVar ? EndVar->getInit() : EndCall,
&ContainerNeedsDereference);
QualType InitVarType = InitVar->getType();
QualType CanonicalInitVarType = InitVarType.getCanonicalType();
const CXXMemberCallExpr *BeginCall =
Nodes.getNodeAs<CXXMemberCallExpr>(BeginCallName);
assert(BeginCall && "Bad Callback. No begin call expression.");
QualType CanonicalBeginType =
BeginCall->getMethodDecl()->getReturnType().getCanonicalType();
if (CanonicalBeginType->isPointerType() &&
CanonicalInitVarType->isPointerType()) {
QualType BeginPointeeType = CanonicalBeginType->getPointeeType();
QualType InitPointeeType = CanonicalInitVarType->getPointeeType();
// If the initializer and the variable are both pointers check if the
// un-qualified pointee types match otherwise we don't use auto.
if (!Context->hasSameUnqualifiedType(InitPointeeType, BeginPointeeType))
return;
} else {
// Check for qualified types to avoid conversions from non-const to const
// iterator types.
if (!Context->hasSameType(CanonicalInitVarType, CanonicalBeginType))
return;
}
DerefByValue = Nodes.getNodeAs<QualType>(DerefByValueResultName) != nullptr;
if (!DerefByValue) {
if (const QualType *DerefType =
Nodes.getNodeAs<QualType>(DerefByRefResultName)) {
// A node will only be bound with DerefByRefResultName if we're dealing
// with a user-defined iterator type. Test the const qualification of
// the reference type.
DerefByConstRef = (*DerefType)->getAs<ReferenceType>()->getPointeeType()
.isConstQualified();
} else {
// By nature of the matcher this case is triggered only for built-in
// iterator types (i.e. pointers).
assert(isa<PointerType>(CanonicalInitVarType) &&
"Non-class iterator type is not a pointer type");
QualType InitPointeeType = CanonicalInitVarType->getPointeeType();
QualType BeginPointeeType = CanonicalBeginType->getPointeeType();
// If the initializer and variable have both the same type just use auto
// otherwise we test for const qualification of the pointed-at type.
if (!Context->hasSameType(InitPointeeType, BeginPointeeType))
DerefByConstRef = InitPointeeType.isConstQualified();
}
} else {
// If the dereference operator returns by value then test for the
// canonical const qualification of the init variable type.
DerefByConstRef = CanonicalInitVarType.isConstQualified();
}
} else if (FixerKind == LFK_PseudoArray) {
if (!EndCall)
return;
ContainerExpr = EndCall->getImplicitObjectArgument();
const MemberExpr *Member = dyn_cast<MemberExpr>(EndCall->getCallee());
if (!Member)
return;
ContainerNeedsDereference = Member->isArrow();
}
// We must know the container or an array length bound.
if (!ContainerExpr && !BoundExpr)
return;
findAndVerifyUsages(Context, LoopVar, EndVar, ContainerExpr, BoundExpr,
ContainerNeedsDereference, DerefByValue, DerefByConstRef,
TheLoop, ConfidenceLevel);
}
