forked from qt-creator/qt-creator
488 lines
17 KiB
C++
488 lines
17 KiB
C++
/**************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "LookupContext.h"
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#include "ResolveExpression.h"
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#include "Overview.h"
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#include <CoreTypes.h>
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#include <Symbols.h>
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#include <Literals.h>
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#include <Names.h>
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#include <Scope.h>
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#include <Control.h>
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#include <QtDebug>
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using namespace CPlusPlus;
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/////////////////////////////////////////////////////////////////////
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// LookupContext
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/////////////////////////////////////////////////////////////////////
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LookupContext::LookupContext(Control *control)
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: _control(control),
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_symbol(0)
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{ }
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LookupContext::LookupContext(Symbol *symbol,
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Document::Ptr expressionDocument,
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Document::Ptr thisDocument,
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const Snapshot &snapshot)
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: _symbol(symbol),
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_expressionDocument(expressionDocument),
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_thisDocument(thisDocument),
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_snapshot(snapshot)
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{
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_control = _expressionDocument->control();
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_visibleScopes = buildVisibleScopes();
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}
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bool LookupContext::isValid() const
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{ return _control != 0; }
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Control *LookupContext::control() const
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{ return _control; }
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Symbol *LookupContext::symbol() const
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{ return _symbol; }
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Document::Ptr LookupContext::expressionDocument() const
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{ return _expressionDocument; }
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Document::Ptr LookupContext::thisDocument() const
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{ return _thisDocument; }
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Document::Ptr LookupContext::document(const QString &fileName) const
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{ return _snapshot.value(fileName); }
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Snapshot LookupContext::snapshot() const
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{ return _snapshot; }
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bool LookupContext::maybeValidSymbol(Symbol *symbol,
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ResolveMode mode,
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const QList<Symbol *> &candidates)
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{
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if (((mode & ResolveNamespace) && symbol->isNamespace()) ||
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((mode & ResolveClass) && symbol->isClass()) ||
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(mode & ResolveSymbol)) {
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return ! candidates.contains(symbol);
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}
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return false;
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}
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QList<Scope *> LookupContext::resolveNestedNameSpecifier(QualifiedNameId *q,
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const QList<Scope *> &visibleScopes) const
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{
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QList<Symbol *> candidates;
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QList<Scope *> scopes = visibleScopes;
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for (unsigned i = 0; i < q->nameCount() - 1; ++i) {
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Name *name = q->nameAt(i);
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candidates = resolveClassOrNamespace(name, scopes);
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if (candidates.isEmpty())
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break;
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scopes.clear();
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foreach (Symbol *candidate, candidates) {
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ScopedSymbol *scoped = candidate->asScopedSymbol();
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Scope *members = scoped->members();
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if (! scopes.contains(members))
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scopes.append(members);
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}
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}
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return scopes;
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}
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QList<Symbol *> LookupContext::resolveQualifiedNameId(QualifiedNameId *q,
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const QList<Scope *> &visibleScopes,
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ResolveMode mode) const
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{
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QList<Scope *> scopes;
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if (q->nameCount() == 1)
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scopes = visibleScopes; // ### handle global scope lookup
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else
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scopes = resolveNestedNameSpecifier(q, visibleScopes);
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QList<Scope *> expanded;
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foreach (Scope *scope, scopes) {
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expanded.append(scope);
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for (unsigned i = 0; i < scope->symbolCount(); ++i) {
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Symbol *member = scope->symbolAt(i);
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if (ScopedSymbol *scopedSymbol = member->asScopedSymbol())
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expandEnumOrAnonymousSymbol(scopedSymbol, &expanded);
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}
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}
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return resolve(q->unqualifiedNameId(), expanded, mode);
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}
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QList<Symbol *> LookupContext::resolveOperatorNameId(OperatorNameId *opId,
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const QList<Scope *> &visibleScopes,
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ResolveMode) const
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{
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QList<Symbol *> candidates;
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for (int scopeIndex = 0; scopeIndex < visibleScopes.size(); ++scopeIndex) {
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Scope *scope = visibleScopes.at(scopeIndex);
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for (Symbol *symbol = scope->lookat(opId->kind()); symbol; symbol = symbol->next()) {
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if (! opId->isEqualTo(symbol->name()))
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continue;
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if (! candidates.contains(symbol))
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candidates.append(symbol);
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}
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}
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return candidates;
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}
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QList<Symbol *> LookupContext::resolve(Name *name, const QList<Scope *> &visibleScopes,
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ResolveMode mode) const
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{
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QList<Symbol *> candidates;
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if (!name)
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return candidates; // nothing to do, the symbol is anonymous.
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else if (QualifiedNameId *q = name->asQualifiedNameId())
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return resolveQualifiedNameId(q, visibleScopes, mode);
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else if (OperatorNameId *opId = name->asOperatorNameId())
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return resolveOperatorNameId(opId, visibleScopes, mode);
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else if (Identifier *id = name->identifier()) {
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for (int scopeIndex = 0; scopeIndex < visibleScopes.size(); ++scopeIndex) {
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Scope *scope = visibleScopes.at(scopeIndex);
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for (Symbol *symbol = scope->lookat(id); symbol; symbol = symbol->next()) {
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if (! symbol->name())
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continue; // nothing to do, the symbol is anonymous.
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else if (! maybeValidSymbol(symbol, mode, candidates))
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continue; // skip it, we're not looking for this kind of symbols
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else if (Identifier *symbolId = symbol->identifier()) {
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if (! symbolId->isEqualTo(id))
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continue; // skip it, the symbol's id is not compatible with this lookup.
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}
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if (QualifiedNameId *q = symbol->name()->asQualifiedNameId()) {
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if (name->isDestructorNameId() != q->unqualifiedNameId()->isDestructorNameId())
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continue;
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else if (q->nameCount() > 1) {
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Name *classOrNamespaceName = control()->qualifiedNameId(q->names(),
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q->nameCount() - 1);
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if (Identifier *classOrNamespaceNameId = identifier(classOrNamespaceName)) {
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if (classOrNamespaceNameId->isEqualTo(id))
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continue;
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}
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const QList<Symbol *> resolvedClassOrNamespace =
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resolveClassOrNamespace(classOrNamespaceName, visibleScopes);
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bool good = false;
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foreach (Symbol *classOrNamespace, resolvedClassOrNamespace) {
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ScopedSymbol *scoped = classOrNamespace->asScopedSymbol();
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if (visibleScopes.contains(scoped->members())) {
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good = true;
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break;
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}
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}
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if (! good)
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continue;
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}
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} else if (symbol->name()->isDestructorNameId() != name->isDestructorNameId()) {
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// ### FIXME: this is wrong!
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continue;
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}
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if (! candidates.contains(symbol))
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candidates.append(symbol);
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}
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}
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}
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return candidates;
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}
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Identifier *LookupContext::identifier(const Name *name) const
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{
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if (name)
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return name->identifier();
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return 0;
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}
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void LookupContext::buildVisibleScopes_helper(Document::Ptr doc, QList<Scope *> *scopes,
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QSet<QString> *processed)
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{
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if (doc && ! processed->contains(doc->fileName())) {
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processed->insert(doc->fileName());
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if (doc->globalSymbolCount())
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scopes->append(doc->globalSymbols());
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foreach (const Document::Include &incl, doc->includes()) {
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buildVisibleScopes_helper(_snapshot.value(incl.fileName()),
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scopes, processed);
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}
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}
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}
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QList<Scope *> LookupContext::buildVisibleScopes()
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{
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QList<Scope *> scopes;
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if (_symbol) {
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for (Scope *scope = _symbol->scope(); scope; scope = scope->enclosingScope()) {
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if (scope == _thisDocument->globalSymbols())
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break;
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scopes.append(scope);
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}
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}
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QSet<QString> processed;
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buildVisibleScopes_helper(_thisDocument, &scopes, &processed);
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while (true) {
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QList<Scope *> expandedScopes;
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expand(scopes, &expandedScopes);
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if (expandedScopes.size() == scopes.size())
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return expandedScopes;
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scopes = expandedScopes;
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}
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return scopes;
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}
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QList<Scope *> LookupContext::visibleScopes(const QPair<FullySpecifiedType, Symbol *> &result) const
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{
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Symbol *symbol = result.second;
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QList<Scope *> scopes;
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for (Scope *scope = symbol->scope(); scope; scope = scope->enclosingScope())
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scopes.append(scope);
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scopes += visibleScopes();
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scopes = expand(scopes);
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return scopes;
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}
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void LookupContext::expandEnumOrAnonymousSymbol(ScopedSymbol *scopedSymbol,
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QList<Scope *> *expandedScopes) const
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{
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if (! scopedSymbol || expandedScopes->contains(scopedSymbol->members()))
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return;
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Scope *members = scopedSymbol->members();
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if (scopedSymbol->isEnum())
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expandedScopes->append(members);
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else if (! scopedSymbol->name() && (scopedSymbol->isClass() || scopedSymbol->isNamespace())) {
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// anonymous class or namespace
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expandedScopes->append(members);
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for (unsigned i = 0; i < members->symbolCount(); ++i) {
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Symbol *member = members->symbolAt(i);
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if (ScopedSymbol *nested = member->asScopedSymbol()) {
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expandEnumOrAnonymousSymbol(nested, expandedScopes);
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}
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}
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}
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}
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QList<Scope *> LookupContext::expand(const QList<Scope *> &scopes) const
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{
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QList<Scope *> expanded;
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expand(scopes, &expanded);
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return expanded;
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}
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void LookupContext::expand(const QList<Scope *> &scopes, QList<Scope *> *expandedScopes) const
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{
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for (int i = 0; i < scopes.size(); ++i) {
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expand(scopes.at(i), scopes, expandedScopes);
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}
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}
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void LookupContext::expandNamespace(Namespace *ns,
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const QList<Scope *> &visibleScopes,
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QList<Scope *> *expandedScopes) const
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{
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if (Name *nsName = ns->name()) {
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const QList<Symbol *> namespaceList = resolveNamespace(nsName, visibleScopes);
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foreach (Symbol *otherNs, namespaceList) {
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if (otherNs == ns)
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continue;
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expand(otherNs->asNamespace()->members(), visibleScopes, expandedScopes);
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}
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}
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for (unsigned i = 0; i < ns->memberCount(); ++i) { // ### make me fast
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Symbol *symbol = ns->memberAt(i);
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if (Namespace *otherNs = symbol->asNamespace()) {
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if (! otherNs->name()) {
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expand(otherNs->members(), visibleScopes, expandedScopes);
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}
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} else if (UsingNamespaceDirective *u = symbol->asUsingNamespaceDirective()) {
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const QList<Symbol *> candidates = resolveNamespace(u->name(), visibleScopes);
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for (int j = 0; j < candidates.size(); ++j) {
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expand(candidates.at(j)->asNamespace()->members(),
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visibleScopes, expandedScopes);
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}
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} else if (Enum *e = symbol->asEnum()) {
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expand(e->members(), visibleScopes, expandedScopes);
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}
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}
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}
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void LookupContext::expandClass(Class *klass,
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const QList<Scope *> &visibleScopes,
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QList<Scope *> *expandedScopes) const
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{
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for (unsigned i = 0; i < klass->memberCount(); ++i) {
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Symbol *symbol = klass->memberAt(i);
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if (Class *nestedClass = symbol->asClass()) {
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if (! nestedClass->name()) {
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expand(nestedClass->members(), visibleScopes, expandedScopes);
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}
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} else if (Enum *e = symbol->asEnum()) {
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expand(e->members(), visibleScopes, expandedScopes);
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}
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}
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if (klass->baseClassCount()) {
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QList<Scope *> classVisibleScopes = visibleScopes;
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for (Scope *scope = klass->scope(); scope; scope = scope->enclosingScope()) {
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if (scope->isNamespaceScope()) {
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Namespace *enclosingNamespace = scope->owner()->asNamespace();
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if (enclosingNamespace->name()) {
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const QList<Symbol *> nsList = resolveNamespace(enclosingNamespace->name(),
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visibleScopes);
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foreach (Symbol *ns, nsList) {
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expand(ns->asNamespace()->members(), classVisibleScopes,
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&classVisibleScopes);
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}
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}
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}
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}
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for (unsigned i = 0; i < klass->baseClassCount(); ++i) {
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BaseClass *baseClass = klass->baseClassAt(i);
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Name *baseClassName = baseClass->name();
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const QList<Symbol *> baseClassCandidates = resolveClass(baseClassName,
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classVisibleScopes);
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for (int j = 0; j < baseClassCandidates.size(); ++j) {
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if (Class *baseClassSymbol = baseClassCandidates.at(j)->asClass())
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expand(baseClassSymbol->members(), visibleScopes, expandedScopes);
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}
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}
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}
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}
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void LookupContext::expandBlock(Block *blockSymbol,
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const QList<Scope *> &visibleScopes,
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QList<Scope *> *expandedScopes) const
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{
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for (unsigned i = 0; i < blockSymbol->memberCount(); ++i) {
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Symbol *symbol = blockSymbol->memberAt(i);
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if (UsingNamespaceDirective *u = symbol->asUsingNamespaceDirective()) {
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const QList<Symbol *> candidates = resolveNamespace(u->name(),
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visibleScopes);
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for (int j = 0; j < candidates.size(); ++j) {
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expand(candidates.at(j)->asNamespace()->members(),
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visibleScopes, expandedScopes);
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}
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}
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}
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}
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void LookupContext::expandFunction(Function *function,
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const QList<Scope *> &visibleScopes,
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QList<Scope *> *expandedScopes) const
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{
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if (! expandedScopes->contains(function->arguments()))
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expandedScopes->append(function->arguments());
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if (QualifiedNameId *q = function->name()->asQualifiedNameId()) {
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Name *nestedNameSpec = 0;
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if (q->nameCount() == 1)
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nestedNameSpec = q->nameAt(0);
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else
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nestedNameSpec = control()->qualifiedNameId(q->names(), q->nameCount() - 1,
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q->isGlobal());
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const QList<Symbol *> candidates = resolveClassOrNamespace(nestedNameSpec, visibleScopes);
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for (int j = 0; j < candidates.size(); ++j) {
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expand(candidates.at(j)->asScopedSymbol()->members(),
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visibleScopes, expandedScopes);
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}
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}
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}
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void LookupContext::expand(Scope *scope,
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const QList<Scope *> &visibleScopes,
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QList<Scope *> *expandedScopes) const
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{
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if (expandedScopes->contains(scope))
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return;
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expandedScopes->append(scope);
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if (Namespace *ns = scope->owner()->asNamespace()) {
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expandNamespace(ns, visibleScopes, expandedScopes);
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} else if (Class *klass = scope->owner()->asClass()) {
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expandClass(klass, visibleScopes, expandedScopes);
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} else if (Block *block = scope->owner()->asBlock()) {
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expandBlock(block, visibleScopes, expandedScopes);
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} else if (Function *fun = scope->owner()->asFunction()) {
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expandFunction(fun, visibleScopes, expandedScopes);
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}
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}
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