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kde-extraapps/kdevelop/languages/cpp/cppduchain/templatedeclaration.cpp
Ivailo Monev f4850a782f generic: import kdevplatform and kdevelop
2015-07-26 14:23:17 +03:00

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/* This file is part of KDevelop
Copyright 2007 David Nolden <david.nolden.kdevelop@art-master.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "templatedeclaration.h"
#include <QThreadStorage>
#include <kglobal.h>
#include <language/duchain/declaration.h>
#include <language/duchain/declarationdata.h>
#include <language/duchain/forwarddeclaration.h>
#include <language/duchain/aliasdeclaration.h>
#include <language/duchain/functiondeclaration.h>
#include <language/duchain/functiondefinition.h>
#include <language/duchain/classfunctiondeclaration.h>
#include "templateparameterdeclaration.h"
#include "qtfunctiondeclaration.h"
#include "cppducontext.h"
#include "expressionparser.h"
#include "templateresolver.h"
#include <language/duchain/classdeclaration.h>
#include <language/duchain/duchainregister.h>
#include <util/pushvalue.h>
#include <parsesession.h>
using namespace KDevelop;
using namespace Cpp;
#define REGISTER_TEMPLATE_DECLARATION(Declaration) typedef SpecialTemplateDeclaration<Declaration> TheTemplate ## Declaration; \
REGISTER_DUCHAIN_ITEM_WITH_DATA(TheTemplate ## Declaration, SpecialTemplateDeclarationData<Declaration::Data>);
REGISTER_TEMPLATE_DECLARATION(Declaration)
REGISTER_TEMPLATE_DECLARATION(ClassDeclaration)
REGISTER_TEMPLATE_DECLARATION(TemplateParameterDeclaration)
REGISTER_TEMPLATE_DECLARATION(ClassFunctionDeclaration)
REGISTER_TEMPLATE_DECLARATION(ClassMemberDeclaration)
REGISTER_TEMPLATE_DECLARATION(FunctionDeclaration)
REGISTER_TEMPLATE_DECLARATION(QtFunctionDeclaration)
REGISTER_TEMPLATE_DECLARATION(FunctionDefinition)
REGISTER_TEMPLATE_DECLARATION(AliasDeclaration)
REGISTER_TEMPLATE_DECLARATION(ForwardDeclaration)
QMutex TemplateDeclaration::instantiationsMutex(QMutex::Recursive);
typedef CppDUContext<KDevelop::DUContext> StandardCppDUContext;
namespace Cpp {
DEFINE_LIST_MEMBER_HASH(SpecialTemplateDeclarationData, m_specializations, IndexedDeclaration)
DEFINE_LIST_MEMBER_HASH(SpecialTemplateDeclarationData, m_specializedWith, IndexedType)
}
AbstractType::Ptr applyPointerReference( AbstractType::Ptr ptr, const KDevelop::IndexedTypeIdentifier& id ) {
AbstractType::Ptr ret = ptr;
if(ret && ((static_cast<bool>(ret->modifiers() & AbstractType::ConstModifier) != id.isConstant())
|| (static_cast<bool>(ret->modifiers() & AbstractType::VolatileModifier) != id.isVolatile()))) {
ret->setModifiers((id.isConstant() ? AbstractType::ConstModifier : AbstractType::NoModifiers)
| (id.isVolatile() ? AbstractType::VolatileModifier : AbstractType::NoModifiers));
}
for( int a = 0; a < id.pointerDepth(); ++a ) {
uint modifiers = AbstractType::NoModifiers;
if( id.isConstPointer( a ) )
modifiers = AbstractType::ConstModifier;
PointerType::Ptr newRet( new PointerType() );
newRet->setModifiers(modifiers);
newRet->setBaseType( ret );
ret = newRet.cast<AbstractType>();
}
if(id.isReference() ) {
uint modifiers = AbstractType::NoModifiers;
if( id.isConstant() )
modifiers |= AbstractType::ConstModifier;
if( id.isVolatile() )
modifiers |= AbstractType::VolatileModifier;
ReferenceType::Ptr newRet( new ReferenceType() );
newRet->setModifiers(modifiers);
newRet->setBaseType( ret );
newRet->setIsRValue(id.isRValue());
ret = newRet.cast<AbstractType>();
}
return ret;
}
///Finds out whether any DelayedType's are involved in a given type(It searches return-values, argument-types, base-classes, etc.)
struct DelayedTypeSearcher : public KDevelop::SimpleTypeVisitor {
bool found;
DelayedTypeSearcher() : found(false) {
}
// We want to use SimpleTypeVisitor implementations
using SimpleTypeVisitor::visit;
virtual bool visit ( const AbstractType* type ) override {
if( found ) return false;
if( dynamic_cast<const DelayedType*>(type) )
found = true;
return !found;
}
virtual bool visit (const StructureType *) override {
///We do not want to visit member-types, so return false here
return false;
}
};
namespace Cpp {
TypePtr<DelayedType> containsDelayedType(AbstractType::Ptr type)
{
PointerType::Ptr pType = type.cast<PointerType>();
ReferenceType::Ptr rType = type.cast<ReferenceType>();
DelayedType::Ptr delayedType = type.cast<DelayedType>();
TypeAliasType::Ptr aType = type.cast<TypeAliasType>();
if( pType )
return containsDelayedType(pType->baseType());
if( rType )
return containsDelayedType(rType->baseType());
if( aType )
return containsDelayedType(aType->type());
return delayedType;
}
}
/**
* Thread-local data to ensure recursion limits are not exceeded.
* Also holds the implementation data to support defaulte template parameters.
*/
struct ThreadLocalData {
ThreadLocalData()
: delayedDepth(0)
, aliasDepth(0)
{}
// used to apply default template parameters
QMultiHash<IndexedQualifiedIdentifier, IndexedType> typeOverloads;
// recursion counter for delayed type resolution
uint delayedDepth;
// recursion counter for alias type resolution
uint aliasDepth;
};
#if (QT_VERSION >= 0x040801)
QThreadStorage<ThreadLocalData> threadData;
inline ThreadLocalData& threadDataLocal() {
return threadData.localData();
}
#else
QThreadStorage<ThreadLocalData*> threadData;
inline ThreadLocalData& threadDataLocal() {
if(!threadData.localData())
threadData.setLocalData(new ThreadLocalData());
return *threadData.localData();
}
#endif
/**
* RAII class to push/pop a type overload for a given identifier.
*/
struct PushTypeOverload
{
PushTypeOverload(const IndexedQualifiedIdentifier& qid_, const IndexedType& type_)
: qid(qid_)
, type(type_)
, data(threadDataLocal())
{
data.typeOverloads.insert(qid, type);
}
~PushTypeOverload()
{
data.typeOverloads.remove(qid, type);
}
private:
IndexedQualifiedIdentifier qid;
IndexedType type;
ThreadLocalData& data;
};
/**
* Replaces any DelayedTypes in interesting positions with their resolved versions,
* if they can be resolved.
*/
struct DelayedTypeResolver : public KDevelop::TypeExchanger
{
const KDevelop::DUContext* searchContext;
const KDevelop::TopDUContext* source;
KDevelop::DUContext::SearchFlags searchFlags;
DelayedTypeResolver(const DUContext* _searchContext,
const TopDUContext* _source,
DUContext::SearchFlags _searchFlags = DUContext::NoUndefinedTemplateParams)
: searchContext(_searchContext)
, source(_source)
, searchFlags(_searchFlags)
{ }
virtual AbstractType::Ptr exchange( const AbstractType::Ptr& type )
{
ThreadLocalData& data = threadDataLocal();
PushValue<uint> inc(data.delayedDepth, data.delayedDepth + 1);
if( data.delayedDepth > 30 ) {
kDebug(9007) << "Too much depth in DelayedTypeResolver::exchange, while exchanging" << (type ? type->toString() : QString("(null)"));
return type;
}
DelayedType::Ptr delayedType = type.cast<DelayedType>();
if( delayedType && delayedType->kind() == DelayedType::Delayed ) {
QualifiedIdentifier qid = delayedType->identifier().identifier().identifier();
if( !qid.isExpression() ) {
// look for default template parameters
IndexedType indexedType = data.typeOverloads.value(qid);
if(!indexedType) {
// fall back to normal DUContext search
DUContext::SearchItem::PtrList identifiers;
identifiers << DUContext::SearchItem::Ptr( new DUContext::SearchItem(qid) );
DUContext::DeclarationList decls;
if( !searchContext->findDeclarationsInternal( identifiers, searchContext->range().end, AbstractType::Ptr(), decls, source, searchFlags, 0 ) )
return type;
if( !decls.isEmpty() ) {
indexedType = decls[0]->indexedType();
}
}
if( indexedType.isValid() ) {
return applyPointerReference(indexedType.abstractType(), delayedType->identifier());
}
}
///Resolution as type has failed, or is not appropriate.
///Resolve delayed expression, for example static numeric expressions
ExpressionParser p;
ExpressionEvaluationResult res;
if( qid.isExpression() )
res = p.evaluateExpression( delayedType->identifier().toString().toUtf8(), DUContextPointer(const_cast<DUContext*>(searchContext)), source );
else
res = p.evaluateType( delayedType->identifier().toString().toUtf8(), DUContextPointer(const_cast<DUContext*>(searchContext)), source );
// NOTE: This looks hacky, but see e.g. TestDUChain::testDecltypeTypedef - we really _never_
// can replace a delayed type with a CppTemplateParameterType. Instead we need to create
// a new delayed type for that with its identifier.
//TODO: try to add support for replacing CppTemplateParameterTypes directly eventually...
// dunno if its actually doable though
AbstractType::Ptr ret = res.type.abstractType();
if (CppTemplateParameterType::Ptr tplParam = ret.cast<CppTemplateParameterType>()) {
DelayedType::Ptr delayed(new DelayedType);
delayed->setIdentifier(IndexedTypeIdentifier(tplParam->declarationId().qualifiedIdentifier().last().toString()));
return delayed.cast<AbstractType>();
}
return ret;
}else{
if( containsDelayedType(type) )
{
//Copy the type to keep the correct reference/pointer structure
AbstractType::Ptr typeCopy( type->clone() );
PointerType::Ptr pType = typeCopy.cast<PointerType>();
ReferenceType::Ptr rType = typeCopy.cast<ReferenceType>();
TypeAliasType::Ptr aType = typeCopy.cast<TypeAliasType>();
if( pType ) //Replace the base
pType->exchangeTypes(this);
if( rType ) //Replace the base
rType->exchangeTypes(this);
if( aType )
aType->exchangeTypes(this);
return typeCopy;
}
}
return type;
}
virtual bool exchangeMembers() const {
return false;
}
private:
AbstractType::Ptr keepAlive;
};
// bool operator==( const ExpressionEvaluationResult& left, const ExpressionEvaluationResult& right ) {
// return left.type == right.type && left.isInstance == right.isInstance;
// }
namespace Cpp {
// bool operator==( const QList<ExpressionEvaluationResult>& left, const QList<ExpressionEvaluationResult>& right ) {
// return true;
// }
TemplateDeclaration::TemplateDeclaration(const TemplateDeclaration& /*rhs*/)
: m_instantiatedFrom(0)
, m_instantiationDepth(0)
{
}
TemplateDeclaration::TemplateDeclaration()
: m_instantiatedFrom(0)
, m_instantiationDepth(0)
{
}
Declaration* TemplateDeclaration::specialize(const IndexedInstantiationInformation& specialization,
const TopDUContext* topContext, int upDistance) {
if(!specialization.isValid())
return dynamic_cast<Declaration*>(this);
else {
InstantiationInformation information = IndexedInstantiationInformation( specialization ).information();
//Add empty elements until the specified depth
for(int a = 0; a < upDistance; ++a) {
InstantiationInformation nextInformation;
nextInformation.previousInstantiationInformation = information.indexed();
information = nextInformation;
}
return instantiate(information, topContext);
}
}
IndexedInstantiationInformation TemplateDeclaration::specialization() const {
if(m_instantiatedWith.isValid())
return m_instantiatedWith;
else
return IndexedInstantiationInformation();
}
// DeclarationId TemplateDeclaration::id() const {
// const Declaration* thisDecl = dynamic_cast<const Declaration*>(this);
// if(m_instantiatedFrom) {
// DeclarationId ret = m_instantiatedFrom->id();
// ret.setSpecialization(m_instantiatedWith.index());
// return ret;
// } else{
// thisDecl->topContext()->ownIndex();
// return thisDecl->Declaration::id();
// }
// }
DUContext* TemplateDeclaration::templateContext(const TopDUContext* source) const {
return getTemplateContext(dynamic_cast<Declaration*>(const_cast<TemplateDeclaration*>(this)), source);
}
TemplateDeclaration::~TemplateDeclaration()
{
InstantiationsHash instantiations;
{
///Unregister at the declaration this one is instantiated from
if( m_instantiatedFrom ) {
InstantiationsHash::iterator it = m_instantiatedFrom->m_instantiations.find(m_instantiatedWith);
if( it != m_instantiatedFrom->m_instantiations.end() ) {
Q_ASSERT(*it == this);
m_instantiatedFrom->m_instantiations.erase(it);
}
m_instantiatedFrom = 0;
}
}
deleteAllInstantiations();
}
TemplateDeclaration* TemplateDeclaration::instantiatedFrom() const {
return m_instantiatedFrom;
}
void TemplateDeclaration::setSpecializedFrom(TemplateDeclaration* other) {
if(other && other->instantiatedFrom()) {
setSpecializedFrom(other->instantiatedFrom());
return;
}
if(other && other->specializedFrom().data()) {
setSpecializedFrom(dynamic_cast<TemplateDeclaration*>(other->specializedFrom().data()));
return;
}
IndexedDeclaration indexedSelf(dynamic_cast<Declaration*>(this));
IndexedDeclaration indexedOther(dynamic_cast<Declaration*>(other));
Q_ASSERT(indexedSelf.data());
if( TemplateDeclaration* tplDec = dynamic_cast<TemplateDeclaration*>(specializedFrom().data()) )
tplDec->removeSpecializationInternal(indexedSelf);
setSpecializedFromInternal(indexedOther);
if( TemplateDeclaration* otherTemplate = dynamic_cast<TemplateDeclaration*>(indexedOther.data()) ) {
otherTemplate->addSpecializationInternal(indexedSelf);
otherTemplate->deleteAllInstantiations();
}
}
void TemplateDeclaration::reserveInstantiation(const IndexedInstantiationInformation& info) {
QMutexLocker l(&instantiationsMutex);
Q_ASSERT(m_instantiations.find(info) == m_instantiations.end());
m_instantiations.insert(info, 0);
}
///Reads the template-parameters from the template-context of the declaration, and puts them into the identifier.
///Must be called AFTER the declaration was instantiated.
void updateIdentifierTemplateParameters( Identifier& identifier, Declaration* basicDeclaration, const TopDUContext* top )
{
identifier.clearTemplateIdentifiers();
TemplateDeclaration* tempDecl = dynamic_cast<TemplateDeclaration*>(basicDeclaration);
if(tempDecl) {
InstantiationInformation specializedWith(tempDecl->specializedWith().information());
if(specializedWith.templateParametersSize()) {
//Use the information from the specialization-information to build the template-identifiers
FOREACH_FUNCTION(const IndexedType& indexedType, specializedWith.templateParameters) {
AbstractType::Ptr type = indexedType.abstractType();
if(type)
identifier.appendTemplateIdentifier( IndexedTypeIdentifier(type->toString()) );
else
identifier.appendTemplateIdentifier( IndexedTypeIdentifier("(missing template type)") );
}
return;
}
}
DUContext* templateCtx = getTemplateContext(basicDeclaration, top);
if( !templateCtx )
return;
for( int a = 0; a < templateCtx->localDeclarations().count(); a++ ) {
AbstractType::Ptr type = templateCtx->localDeclarations()[a]->abstractType();
if(type)
identifier.appendTemplateIdentifier( IndexedTypeIdentifier(type->toString()) );
else
identifier.appendTemplateIdentifier( IndexedTypeIdentifier("(missing template type)") );
}
}
void TemplateDeclaration::setInstantiatedFrom(TemplateDeclaration* from, const InstantiationInformation& instantiatedWith)
{
Q_ASSERT(from != this);
//Change the identifier so it contains the template-parameters
QMutexLocker l(&instantiationsMutex);
if( m_instantiatedFrom ) {
InstantiationsHash::iterator it = m_instantiatedFrom->m_instantiations.find(m_instantiatedWith);
if( it != m_instantiatedFrom->m_instantiations.end() && *it == this )
m_instantiatedFrom->m_instantiations.erase(it);
m_instantiatedFrom = 0;
}
m_instantiatedFrom = from;
m_instantiatedWith = instantiatedWith.indexed();
//Only one instantiation is allowed
if(from) {
//Either it must be reserved, or not exist yet
Q_ASSERT(from->m_instantiations.find(instantiatedWith.indexed()) == from->m_instantiations.end() || (*from->m_instantiations.find(instantiatedWith.indexed())) == 0);
from->m_instantiations.insert(m_instantiatedWith, this);
Q_ASSERT(from->m_instantiations.contains(m_instantiatedWith));
}
}
bool TemplateDeclaration::isInstantiatedFrom(const TemplateDeclaration* other) const {
QMutexLocker l(&instantiationsMutex);
InstantiationsHash::const_iterator it = other->m_instantiations.find(m_instantiatedWith);
if( it != other->m_instantiations.end() && (*it) == this )
return true;
else
return false;
}
void TemplateDeclaration::setTemplateParameterContext(KDevelop::DUContext* context) {
dynamicTemplateData()->m_parameterContext = context;
}
KDevelop::DUContext* TemplateDeclaration::templateParameterContext() const {
return const_cast<KDevelop::DUContext*>(templateData()->m_parameterContext.data()); ///@todo make data() const; return non-const pointer in duchain-pointer
}
bool isTemplateDeclaration(const KDevelop::Declaration* decl) {
return (bool)dynamic_cast<const TemplateDeclaration*>(decl);
}
///@todo prevent endless recursion when resolving base-classes!(Parent is not yet in du-chain, so a base-class that references it will cause endless recursion)
CppDUContext<KDevelop::DUContext>* instantiateDeclarationAndContext( KDevelop::DUContext* parentContext, const TopDUContext* source, KDevelop::DUContext* context, const InstantiationInformation& templateArguments, Declaration* instantiatedDeclaration, Declaration* instantiatedFrom, bool doNotRegister )
{
Q_ASSERT(parentContext);
TemplateDeclaration* instantiatedFromTemplate = dynamic_cast<TemplateDeclaration*>(instantiatedFrom);
StandardCppDUContext* contextCopy = 0;
if( context ) {
///Specialize involved contexts
Q_ASSERT(context->parentContext()); //Top-context is not allowed
contextCopy = new StandardCppDUContext(context->range(), parentContext, true); //We do not need to care about TopDUContext here, because a top-context can not be instantiated
contextCopy->setType(context->type());
contextCopy->setLocalScopeIdentifier(context->localScopeIdentifier());
if( instantiatedDeclaration )
instantiatedDeclaration->setInternalContext(contextCopy);
///Now the created context is already partially functional and can be used for searching(not the instantiated template-params yet though)
if( context->type() == KDevelop::DUContext::Template ) {
///We're in the template-parameter context, exchange the template-parameters with their values.
///Specialize the local template-declarations
uint currentArgument = 0;
InstantiationInformation parameterInstantiationInformation;
parameterInstantiationInformation.previousInstantiationInformation = templateArguments.indexed();
foreach(Declaration* decl, context->localDeclarations())
{
#ifdef QT_DEBUG
TemplateDeclaration* tempDecl = dynamic_cast<TemplateDeclaration*>(decl);
Q_ASSERT(tempDecl);
// tempDecl->instantiate(parameterInstantiationInformation, source, true);
#endif
TemplateParameterDeclaration* templateDecl = dynamic_cast<TemplateParameterDeclaration*>(decl);
Q_ASSERT(templateDecl); //Only template-parameter declarations are allowed in template-contexts
TemplateParameterDeclaration* declCopy = dynamic_cast<TemplateParameterDeclaration*>(decl->clone());
Q_ASSERT(declCopy);
TemplateDeclaration* tempCopyDecl = dynamic_cast<TemplateDeclaration*>(declCopy);
Q_ASSERT(tempCopyDecl);
if( currentArgument < templateArguments.templateParametersSize() && templateArguments.templateParameters()[currentArgument].abstractType() )
{
declCopy->setAbstractType( templateArguments.templateParameters()[currentArgument].abstractType() );
} else {
//Apply default-parameters, although these should have been applied before
//Use the already available delayed-type resolution to resolve the value/type
if( !templateDecl->defaultParameter().isEmpty() ) {
DelayedType::Ptr delayed( new DelayedType() );
delayed->setIdentifier( IndexedTypeIdentifier(templateDecl->defaultParameter()) );
declCopy->setAbstractType( resolveDelayedTypes( delayed.cast<AbstractType>(), contextCopy, source) );
}else{
//Parameter missing
}
}
///We mark the declaration as a specialization, so no index is created for it within the top-context(that needs a write-lock)
tempCopyDecl->setInstantiatedFrom(0, parameterInstantiationInformation);
///This inserts the copied declaration into the copied context
declCopy->setContext(contextCopy);
++currentArgument;
}
}
///Find the template-parameter context, and recurse into it, so we can replace the template parameters
foreach( const DUContext::Import &importedContext, context->importedParentContexts() )
{
CppDUContext<DUContext>* import = dynamic_cast<CppDUContext<DUContext>*>(importedContext.context(source));
if( !import)
continue;
///For functions, the Template-context is one level deeper(it is imported by the function-context) so also copy the function-context
if( import->type() == KDevelop::DUContext::Template || import->type() == KDevelop::DUContext::Function )
{
DUContext* ctx = import->instantiate(templateArguments, source);
contextCopy->addImportedParentContext( ctx, CursorInRevision(), true );
if( instantiatedDeclaration && import->type() == KDevelop::DUContext::Template ) {
TemplateDeclaration* tempDecl = dynamic_cast<TemplateDeclaration*>(instantiatedDeclaration);
if( instantiatedDeclaration )
tempDecl->setTemplateParameterContext( ctx );
else
kDebug(9007) << "instantiated declaration is not a template declaration";
}
}
else
{
//Import all other imported contexts
contextCopy->addImportedParentContext( import, CursorInRevision::invalid(), true );
}
}
if( instantiatedDeclaration ) {
///We do not need to respect forward-declarations here, because they are not allowed as base-classes.
ClassDeclaration* klass = dynamic_cast<ClassDeclaration*>( instantiatedDeclaration );
if( klass ) { //It could also be a function
///Resolve template-dependent base-classes(They can not be found in the imports-list, because their type is DelayedType and those have no context)
uint num = 0;
FOREACH_FUNCTION( const BaseClassInstance& base, klass->baseClasses ) {
DelayedType::Ptr delayed = base.baseClass.type<DelayedType>();
if( delayed ) {
///Resolve the delayed type, and import the context
DelayedTypeResolver res(contextCopy, source);
AbstractType::Ptr newType( res.exchange(delayed.cast<AbstractType>()) );
newType = TypeUtils::unAliasedType(newType);
if( CppClassType::Ptr baseClass = newType.cast<CppClassType>() )
{
if( baseClass->declaration(source) && baseClass->declaration(source)->internalContext() )
{
contextCopy->addImportedParentContext( baseClass->declaration(source)->internalContext(), CursorInRevision::invalid(), true );
}
BaseClassInstance newInstance(base);
newInstance.baseClass = newType->indexed();
klass->replaceBaseClass( num, newInstance );
} else {
kWarning(9007) << "Resolved bad base-class" << delayed->toString() << (newType ? newType->toString() : QString());
}
}
++num;
}
}
}
} else {
///Note: this is possible, for example for template function-declarations(They do not have an internal context, because they have no compound statement), for variables, etc..
///Directly take their assigned template-parameter-context and specialize it. We need it at least for overload-resolution.
TemplateDeclaration* fromTemplateDecl = dynamic_cast<TemplateDeclaration*>(instantiatedFrom);
TemplateDeclaration* toTemplateDecl = dynamic_cast<TemplateDeclaration*>(instantiatedDeclaration);
if( toTemplateDecl && fromTemplateDecl && fromTemplateDecl->templateParameterContext() ) {
CppDUContext<DUContext>* templCtx = dynamic_cast<CppDUContext<DUContext>*>(fromTemplateDecl->templateParameterContext());
DUContext* ctx = templCtx->instantiate(templateArguments, source);
toTemplateDecl->setTemplateParameterContext( ctx );
}
}
if( contextCopy && !doNotRegister )
contextCopy->setInstantiatedFrom(dynamic_cast<CppDUContext<DUContext>*>(context), templateArguments);
///Since now the context is accessible through the du-chain, so it must not be changed any more.
if( instantiatedDeclaration && instantiatedDeclaration->abstractType() ) {
///an AliasDeclaration represents a C++ "using bla::bla;" declaration.
if(AliasDeclaration* alias = dynamic_cast<AliasDeclaration*>(instantiatedDeclaration)) {
ThreadLocalData& data = threadDataLocal();
PushValue<uint> safety(data.aliasDepth, data.delayedDepth + 1);
if(data.aliasDepth > 30) {
kWarning() << "depth-limit reached while resolving alias-declaration" << alias->identifier().toString() << "within" << parentContext->scopeIdentifier(true).toString();
}else {
///For alias declaration, we resolve the declaration that is aliased instead of a type.
///For this reason, template alias-declarations have a DelayedType assigned
DelayedType::Ptr delayed = alias->type<DelayedType>();
if(delayed) {
QList<Declaration*> declarations = parentContext->findDeclarations(delayed->identifier().identifier().identifier());
if(!declarations.isEmpty())
alias->setAliasedDeclaration(declarations.first());
}
}
}else{
TemplateDeclaration* instantiatedTemplate = dynamic_cast<TemplateDeclaration*>(instantiatedDeclaration);
InstantiationInformation globalTemplateArguments = templateArguments;
if(instantiatedTemplate) {
//Update the "specializedWith" information
InstantiationInformation oldSpecializedWith = instantiatedTemplate->specializedWith().information();
if(oldSpecializedWith.templateParametersSize()) {
//Replace the delayed types in the specialization-information with their real types
InstantiationInformation newSpecializedWith(oldSpecializedWith);
newSpecializedWith.templateParametersList().clear();
FOREACH_FUNCTION(const IndexedType& type, oldSpecializedWith.templateParameters)
newSpecializedWith.addTemplateParameter(resolveDelayedTypes(type.abstractType(), instantiatedDeclaration->internalContext() ? instantiatedDeclaration->internalContext() : parentContext, source ));
instantiatedTemplate->setSpecializedWith(newSpecializedWith.indexed());
globalTemplateArguments = newSpecializedWith;
}
}
///Resolve all involved delayed types
AbstractType::Ptr t(instantiatedDeclaration->abstractType());
IdentifiedType* idType = dynamic_cast<IdentifiedType*>(t.unsafeData());
///Use the internal context if it exists, so undefined template-arguments can be found and the DelayedType can be further delayed then.
AbstractType::Ptr changedType = resolveDelayedTypes( instantiatedDeclaration->abstractType(), instantiatedDeclaration->internalContext() ? instantiatedDeclaration->internalContext() : parentContext, source );
if( idType && idType->declarationId() == instantiatedFrom->id() ) {
if( changedType == instantiatedDeclaration->abstractType() )
changedType = instantiatedDeclaration->abstractType()->clone();
IdentifiedType* changedIdType = dynamic_cast<IdentifiedType*>(changedType.unsafeData());
if( changedIdType ) {
DeclarationId base = instantiatedFrom->id();
if(instantiatedFromTemplate && instantiatedFromTemplate->specializedFrom().data())
base = instantiatedFromTemplate->specializedFrom().data()->id();
base.setSpecialization(globalTemplateArguments.indexed());
changedIdType->setDeclarationId(base);
}
}
instantiatedDeclaration->setAbstractType( changedType );
}
// }
}
if( instantiatedDeclaration ) {
TemplateDeclaration* instantiatedTemplate = dynamic_cast<TemplateDeclaration*>(instantiatedDeclaration);
if(instantiatedTemplate && templateArguments.templateParametersSize()) { //Since this is also called for normal members, this does not have to be the case.
///Change the identifier to reflect the used template-arguments
KDevelop::Identifier id = instantiatedDeclaration->identifier();
updateIdentifierTemplateParameters( id, instantiatedDeclaration, source );
instantiatedDeclaration->setIdentifier(id);
}
///Last step, because after this, the declaration will be potentially findable
if(instantiatedTemplate && instantiatedFromTemplate)
instantiatedTemplate->setInstantiatedFrom(instantiatedFromTemplate, templateArguments);
///@todo check for possible multi-threading issues when inserting visible declarations into anonymous contexts
instantiatedDeclaration->setContext(parentContext, templateArguments.templateParametersSize() || parentContext->inSymbolTable());
}
return contextCopy;
}
DeclarationId TemplateDeclaration::id(bool forceDirect) const
{
if(m_instantiatedFrom) {
DeclarationId ret = m_instantiatedFrom->id(forceDirect);
ret.setSpecialization(specialization());
return ret;
}else{
return dynamic_cast<const Declaration*>(this)->Declaration::id(forceDirect);
}
}
void TemplateDeclaration::deleteAllInstantiations()
{
if(m_instantiations.isEmpty() && m_defaultParameterInstantiations.isEmpty())
return;
InstantiationsHash instantiations;
{
QMutexLocker l(&instantiationsMutex);
instantiations = m_instantiations;
m_defaultParameterInstantiations.clear();
m_instantiations.clear();
}
foreach( TemplateDeclaration* decl, instantiations ) {
Q_ASSERT(decl);
decl->m_instantiatedFrom = 0;
//Only delete real insantiations, not specializations
//FIXME: before this checked for decl->isAnonymous
//This was a problem because some instantiations are not anonymous, so they end up orphaned from their m_instantiatedFrom
//If strange crashes start cropping up in template code, this needs more thought
if(!decl->specializedFrom().isValid()) {
Declaration* realDecl = dynamic_cast<Declaration*>(decl);
delete realDecl;
}
}
}
//TODO: QHash?
typedef QMap<IndexedString, AbstractType::Ptr> TemplateParams;
uint matchInstantiationParameters(const InstantiationInformation &info, const InstantiationInformation &matchAgainst,
const TopDUContext *topCtxt, TemplateParams &requiredParams)
{
TemplateResolver resolver(topCtxt);
uint matchQuality = 1;
for(uint a = 0; a < info.templateParametersSize(); ++a) {
uint parameterMatchQuality = resolver.matchTemplateParameterTypes(info.templateParameters()[a].abstractType(),
matchAgainst.templateParameters()[a].abstractType(),
requiredParams);
if (!parameterMatchQuality)
return 0;
matchQuality += parameterMatchQuality;
}
return matchQuality;
}
//Returns the first (and barring bugs the only) imported template context.
//A template decl imports one template context, which in turn imports the template context for the next scope, etc.
DUContext* nextTemplateContext(const DUContext* importingContext, const TopDUContext *topCtxt)
{
foreach( const DUContext::Import &import, importingContext->importedParentContexts() ) {
DUContext* c = import.context(topCtxt);
if (c && c->type() == DUContext::Template)
return c;
}
return 0;
}
uint TemplateDeclaration::matchInstantiation(IndexedInstantiationInformation indexedInfo, const TopDUContext* topCtxt,
InstantiationInformation &instantiateWith, bool &instantiationRequired) const
{
DUContext *templateContext = this->templateParameterContext();
IndexedInstantiationInformation indexedSpecializedWith = this->specializedWith();
uint matchQuality = 1;
instantiationRequired = false;
while(indexedInfo.isValid() && templateContext)
{
if (templateContext->localDeclarations().size())
instantiationRequired = true;
InstantiationInformation info = indexedInfo.information();
InstantiationInformation specializedWith = indexedSpecializedWith.information();
if (info.templateParametersSize() != specializedWith.templateParametersSize())
return 0;
if (!info.templateParametersSize())
{
indexedInfo = info.previousInstantiationInformation;
indexedSpecializedWith = specializedWith.previousInstantiationInformation;
continue;
}
TemplateParams requiredParameters;
foreach(Declaration* parameterDecl, templateContext->localDeclarations())
requiredParameters[parameterDecl->identifier().identifier()] = AbstractType::Ptr();
uint match = matchInstantiationParameters(info, specializedWith, topCtxt, requiredParameters);
if (!match)
return 0;
matchQuality += match;
InstantiationInformation currentInstantiation;
foreach( Declaration* decl, templateContext->localDeclarations() )
{
if( decl->abstractType().cast<CppTemplateParameterType>() )
{
IndexedString identifier = decl->identifier().identifier();
if (requiredParameters[identifier])
currentInstantiation.addTemplateParameter(requiredParameters[identifier]); //Take the type we have assigned.
else
return 0;
}
else
currentInstantiation.addTemplateParameter(decl->abstractType()); //Use the specialized type
}
currentInstantiation.previousInstantiationInformation = instantiateWith.indexed();
instantiateWith = currentInstantiation;
indexedSpecializedWith = specializedWith.previousInstantiationInformation;
indexedInfo = info.previousInstantiationInformation;
templateContext = nextTemplateContext(templateContext, topCtxt);
}
return matchQuality;
}
TemplateDeclaration* TemplateDeclaration::instantiateSpecialization(const InstantiationInformation& info, const TopDUContext* source)
{
TemplateDeclaration *specialization = 0;
InstantiationInformation specializationInstantiationInfo;
bool instantiationRequired;
uint matchQuality = 0;
FOREACH_FUNCTION(const IndexedDeclaration& decl, specializations) {
//We only use visible specializations here
if(source->recursiveImportIndices().contains(decl.indexedTopContext())) {
TemplateDeclaration* curSpecialization = dynamic_cast<TemplateDeclaration*>(decl.data());
if(curSpecialization) {
InstantiationInformation possibleInstantiation;
uint match = curSpecialization->matchInstantiation(info.indexed(), source, possibleInstantiation, instantiationRequired);
if(match > matchQuality) {
matchQuality = match;
specializationInstantiationInfo = possibleInstantiation;
specialization = curSpecialization;
}
}
}
}
if (specialization) {
if (!instantiationRequired)
return specialization;
else
return dynamic_cast<TemplateDeclaration*>(specialization->instantiate(specializationInstantiationInfo, source, true));
}
return 0;
}
void applyDefaultParameters(const DUContext* templateContext, const TopDUContext* source,
const DUContext* surroundingContext,
InstantiationInformation* templateArguments)
{
Q_ASSERT(templateContext);
Q_ASSERT(templateContext->type() == DUContext::Template);
Q_ASSERT(source);
Q_ASSERT(surroundingContext);
const int totalParameters = templateContext->localDeclarations().count();
KDevVarLengthArray<IndexedType, 10> explicitParameters = templateArguments->templateParametersList();
if(totalParameters <= explicitParameters.size()
//TODO: why is this required?
&& (explicitParameters.size() != 1 || explicitParameters.at(0).isValid()))
{
// nothing to do
return;
}
KDevVarLengthArray<IndexedType, 10> appliedParameters;
int currentArgument = 0;
QVector<PushTypeOverload*> typeOverloads;
foreach(Declaration* decl, templateContext->localDeclarations()) {
TemplateParameterDeclaration* templateDecl = dynamic_cast<TemplateParameterDeclaration*>(decl);
Q_ASSERT(templateDecl); //Only template-parameter declarations are allowed in template-contexts
IndexedType type = decl->indexedType();
Q_ASSERT(type.isValid());
if( currentArgument < explicitParameters.size()
&& explicitParameters.at(currentArgument).isValid() )
{
// use explicit parameter
type = explicitParameters.at(currentArgument);
Q_ASSERT(type);
} else if(templateDecl->hasDefaultParameter()) {
// Apply default-parameter
Q_ASSERT(!templateDecl->defaultParameter().isEmpty());
DelayedType::Ptr delayed( new DelayedType() );
delayed->setIdentifier( IndexedTypeIdentifier(templateDecl->defaultParameter()) );
type = resolveDelayedTypes( delayed.cast<AbstractType>(), surroundingContext, source)->indexed();
} // else the parameter is missing
//TODO: why is this neccessary?
if(type.abstractType().cast<CppTemplateParameterType>()) {
++currentArgument;
continue;
}
appliedParameters << type;
if(type != decl->indexedType()) {
// add type overload
typeOverloads << new PushTypeOverload(decl->qualifiedIdentifier(), type);
}
++currentArgument;
}
qDeleteAll(typeOverloads);
templateArguments->templateParametersList() = appliedParameters;
}
Declaration* TemplateDeclaration::instantiate( const InstantiationInformation& _templateArguments, const TopDUContext* source, bool forceLocal )
{
InstantiationInformation templateArguments(_templateArguments);
/* if(dynamic_cast<TopDUContext*>(dynamic_cast<const Declaration*>(this)->context())) {
Q_ASSERT(templateArguments.previousInstantiationInformation == 0);
}*/
if( m_instantiatedFrom && !forceLocal)
return m_instantiatedFrom->instantiate( templateArguments, source );
if ( specializedFrom().data() && !forceLocal )
return dynamic_cast<TemplateDeclaration*>(specializedFrom().declaration())->instantiate(templateArguments, source);
{
QMutexLocker l(&instantiationsMutex);
{
DefaultParameterInstantiationHash::const_iterator it = m_defaultParameterInstantiations.constFind(templateArguments.indexed());
if(it != m_defaultParameterInstantiations.constEnd())
templateArguments = (*it).information();
}
InstantiationsHash::const_iterator it;
it = m_instantiations.constFind( templateArguments.indexed() );
if( it != m_instantiations.constEnd() ) {
if(*it) {
return dynamic_cast<Declaration*>(*it);
}else{
///@todo What if the same thing is instantiated twice in parralel? Then this may trigger as well, altough one side should wait
///We are currently instantiating this declaration with the same template arguments. This would lead to an assertion.
kDebug() << "tried to recursively instantiate" << dynamic_cast<Declaration*>(this)->toString() << "with" << templateArguments.toString();
///Maybe problematic, because the returned declaration is not in the correct context etc.
return 0;
}
}
}
if(!source)
return 0;
if (m_instantiationDepth > 5) {
kWarning() << "depth-limit reached while instantiating template declaration with" << _templateArguments.toString();
return 0;
}
PushValue<int> depthCounter(m_instantiationDepth, m_instantiationDepth + 1);
DUContext* surroundingContext = dynamic_cast<const Declaration*>(this)->context();
if(!surroundingContext) {
kDebug() << "Declaration has no context:" << dynamic_cast<Declaration*>(this)->qualifiedIdentifier().toString() << dynamic_cast<Declaration*>(this)->toString();
return dynamic_cast<Declaration*>(this);
}
Declaration* decl = dynamic_cast<Declaration*>(this);
Q_ASSERT(decl);
Q_ASSERT(decl->topContext());
DUContext* templateContext = getTemplateContext(dynamic_cast<Declaration*>(this), source);
// kDebug() << decl->qualifiedIdentifier().toString() << "got template-context" << templateContext << templateArguments.toString();
if(!forceLocal) {
if(templateContext) {
applyDefaultParameters(templateContext, source, surroundingContext, &templateArguments);
}
///Check whether there is type-aliases in the parameters that need to be resolved
///Generally, resolve all type-aliases that are part of a template-class, and keep the others
{
InstantiationInformation newTemplateArguments = templateArguments;
newTemplateArguments.templateParametersList().clear();
struct UnAliasExchanger : public KDevelop::TypeExchanger {
UnAliasExchanger(const TopDUContext* _source) : source(_source) {
}
const TopDUContext* source;
virtual KDevelop::AbstractType::Ptr exchange(const KDevelop::AbstractType::Ptr& type) {
KDevelop::AbstractType::Ptr check = type;
KDevelop::TypeAliasType::Ptr alias = type.cast<KDevelop::TypeAliasType>();
if(alias) {
//We exchange type-aliases with their real types only of the type-alias is in a template
//class. In that case, we cannot be sure that it's not used for meta-programming.
//All other aliases can be kept, for user-friendliness, even if it's not 100% C++ correct
Declaration* decl = alias->declaration(source);
if(!decl || dynamic_cast<TemplateDeclaration*>(decl)) {
return exchange(alias->type());
}
}
if(check)
check->exchangeTypes(this);
return check;
}
};
UnAliasExchanger exchanger(source);
for(uint a = 0; a < templateArguments.templateParametersSize(); ++a)
newTemplateArguments.templateParametersList().append(exchanger.exchange(templateArguments.templateParameters()[a].abstractType())->indexed());
templateArguments = newTemplateArguments;
}
if(!(templateArguments == _templateArguments)) {
QMutexLocker l(&instantiationsMutex);
m_defaultParameterInstantiations[_templateArguments.indexed()] = templateArguments.indexed();
}
}
{
//Now we have the final template-parameters. Once again check whether we have already instantiated this,
//and if not, reserve the instantiation so we cannot crash later on
///@todo When the same declaration is instantuated multiple times, this sucks because one is returned invalid
QMutexLocker l(&instantiationsMutex);
InstantiationsHash::const_iterator it;
it = m_instantiations.constFind( templateArguments.indexed() );
if( it != m_instantiations.constEnd() ) {
if(*it) {
return dynamic_cast<Declaration*>(*it);
}else{
//Problem
return dynamic_cast<Declaration*>(this);
}
}
///@warning Once we've called reserveInstantiation, we have to be 100% sure that we actually create the instantiation
reserveInstantiation(templateArguments.indexed());
}
TemplateDeclaration *instantiatedSpecialization = instantiateSpecialization(templateArguments, source);
//We have reserved the instantiation, so it must have stayed untouched
Q_ASSERT(m_instantiations[templateArguments.indexed()] == 0);
if(instantiatedSpecialization) {
//A specialization has been chosen and instantiated. Just register it here, and return it.
instantiatedSpecialization->setInstantiatedFrom(this, templateArguments);
return dynamic_cast<Declaration*>(instantiatedSpecialization);
}
{
//Check whether the instantiation also instantiates the parent context, and if it does, replace surroundingContext with the instantiated version
CppDUContext<DUContext>* parent = dynamic_cast<CppDUContext<DUContext>*>(surroundingContext);
if(parent && templateArguments.previousInstantiationInformation.index() && templateArguments.previousInstantiationInformation.index() != parent->instantiatedWith().index()) {
DUContext* surroundingCandidate = parent->instantiate(IndexedInstantiationInformation(templateArguments.previousInstantiationInformation).information(), source);
if(surroundingCandidate)
surroundingContext = surroundingCandidate;
else
kDebug() << "could not instantiate surrounding context for" << dynamic_cast<Declaration*>(this)->qualifiedIdentifier().toString();
}
}
Declaration* clone = decl->clone();
Q_ASSERT(clone);
#ifdef QT_DEBUG
TemplateDeclaration* cloneTemplateDecl = dynamic_cast<TemplateDeclaration*>(clone);
Q_ASSERT(cloneTemplateDecl);
#endif
///Now eventually create the virtual contexts, and fill new information into the declaration
instantiateDeclarationAndContext( surroundingContext, source, decl->internalContext(), templateArguments, clone, decl );
// cloneTemplateDecl->setInstantiatedFrom(this);
Q_ASSERT(clone->topContext());
return clone;
}
AbstractType::Ptr resolveDelayedTypes( AbstractType::Ptr type, const KDevelop::DUContext* context, const KDevelop::TopDUContext* source, KDevelop::DUContext::SearchFlags searchFlags ) {
if( !type )
return type;
///First, find out if delayed types are involved(Function return-type, function-arguments, reference/pointer target, base-class)
DelayedTypeSearcher search;
type->accept(&search);
DelayedType::Ptr delayedType = type.cast<DelayedType>();
if( search.found || delayedType ) {
///Delayed types were found. We must copy the whole type, and replace the delayed types.
DelayedTypeResolver resolver(context, source, searchFlags);
AbstractType::Ptr typeCopy;
if( delayedType )
///The type itself is a delayed type, resolve it
typeCopy = resolver.exchange( type );
else {
///Resolve involved delayed types, now hopefully we know the template-parameters
typeCopy = AbstractType::Ptr( type->clone() );
DelayedTypeSearcher testSearch;
typeCopy->accept(&testSearch);
Q_ASSERT(testSearch.found);
typeCopy->exchangeTypes( &resolver );
}
return typeCopy;
} else {
return type;
}
}
IndexedInstantiationInformation TemplateDeclaration::instantiatedWith() const {
return m_instantiatedWith;
}
TemplateDeclaration::InstantiationsHash TemplateDeclaration::instantiations() const {
QMutexLocker l(&instantiationsMutex);
return m_instantiations;
}
template<>
Declaration* SpecialTemplateDeclaration<ForwardDeclaration>::resolve(const TopDUContext* topContext) const {
if( instantiatedFrom() ) {
SpecialTemplateDeclaration<ForwardDeclaration>* instantiatedFrom = dynamic_cast<SpecialTemplateDeclaration<ForwardDeclaration>*>(this->instantiatedFrom());
if( instantiatedFrom ) {
Declaration* baseResolved = instantiatedFrom->resolve(topContext);
TemplateDeclaration* baseTemplate = dynamic_cast<TemplateDeclaration*>(baseResolved);
if( baseResolved && baseTemplate ) {
return baseTemplate->instantiate(instantiatedWith().information(), topContext ? topContext : this->topContext());
}else{
//Forward-declaration was not resolved
return 0;
}
}else{
//TODO: report this in the problem reporter?
kWarning(9007) << "Problem in template forward-declaration";
return 0;
}
}else{
return ForwardDeclaration::resolve(topContext);
}
}
}
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