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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "TypeOfExpression.h"
#include <TranslationUnit.h>
#include "LookupContext.h"
#include "ResolveExpression.h"
#include "pp.h"
#include <AST.h>
#include <Symbol.h>
#include <QSet>
using namespace CPlusPlus;
TypeOfExpression::TypeOfExpression():
m_ast(0),
m_scope(0),
m_expandTemplates(false)
{
}
void TypeOfExpression::reset()
{
m_thisDocument.clear();
m_snapshot = Snapshot();
m_ast = 0;
m_scope = 0;
m_lookupContext = LookupContext();
m_bindings.clear();
m_environment.clear();
}
void TypeOfExpression::init(Document::Ptr thisDocument, const Snapshot &snapshot,
QSharedPointer<CreateBindings> bindings)
{
m_thisDocument = thisDocument;
m_snapshot = snapshot;
m_ast = 0;
m_scope = 0;
m_lookupContext = LookupContext();
m_bindings = bindings;
m_environment.clear();
}
QList<LookupItem> TypeOfExpression::operator()(const QByteArray &utf8code,
Scope *scope,
PreprocessMode mode)
{
Document::Ptr expressionDoc;
if (mode == Preprocess)
expressionDoc = documentForExpression(preprocessedExpression(utf8code));
else
expressionDoc = documentForExpression(utf8code);
expressionDoc->check();
return this->operator ()(extractExpressionAST(expressionDoc),
expressionDoc,
scope);
}
QList<LookupItem> TypeOfExpression::reference(const QByteArray &utf8code,
Scope *scope,
PreprocessMode mode)
{
Document::Ptr expressionDoc;
if (mode == Preprocess)
expressionDoc = documentForExpression(preprocessedExpression(utf8code));
else
expressionDoc = documentForExpression(utf8code);
expressionDoc->check();
return reference(extractExpressionAST(expressionDoc), expressionDoc, scope);
}
QList<LookupItem> TypeOfExpression::operator()(ExpressionAST *expression,
Document::Ptr document,
Scope *scope)
{
m_ast = expression;
m_scope = scope;
m_lookupContext = LookupContext(document, m_thisDocument, m_snapshot);
m_lookupContext.setBindings(m_bindings);
m_lookupContext.setExpandTemplates(m_expandTemplates);
ResolveExpression resolve(m_lookupContext);
const QList<LookupItem> items = resolve(m_ast, scope);
if (! m_bindings)
m_lookupContext = resolve.context();
return items;
}
QList<LookupItem> TypeOfExpression::reference(ExpressionAST *expression,
Document::Ptr document,
Scope *scope)
{
m_ast = expression;
m_scope = scope;
m_lookupContext = LookupContext(document, m_thisDocument, m_snapshot);
m_lookupContext.setBindings(m_bindings);
m_lookupContext.setExpandTemplates(m_expandTemplates);
ResolveExpression resolve(m_lookupContext);
const QList<LookupItem> items = resolve.reference(m_ast, scope);
if (! m_bindings)
m_lookupContext = resolve.context();
return items;
}
QByteArray TypeOfExpression::preprocess(const QByteArray &utf8code) const
{
return preprocessedExpression(utf8code);
}
ExpressionAST *TypeOfExpression::ast() const
{
return m_ast;
}
Scope *TypeOfExpression::scope() const
{
return m_scope;
}
const LookupContext &TypeOfExpression::context() const
{
return m_lookupContext;
}
ExpressionAST *TypeOfExpression::expressionAST() const
{
return extractExpressionAST(m_lookupContext.expressionDocument());
}
void TypeOfExpression::processEnvironment(Document::Ptr doc, Environment *env,
QSet<QString> *processed) const
{
if (doc && ! processed->contains(doc->fileName())) {
processed->insert(doc->fileName());
foreach (const Document::Include &incl, doc->includes())
processEnvironment(m_snapshot.document(incl.fileName()), env, processed);
foreach (const Macro ¯o, doc->definedMacros())
env->bind(macro);
}
}
QByteArray TypeOfExpression::preprocessedExpression(const QByteArray &utf8code) const
{
if (utf8code.trimmed().isEmpty())
return utf8code;
if (! m_environment) {
Environment *env = new Environment(); // ### cache the environment.
QSet<QString> processed;
processEnvironment(m_thisDocument, env, &processed);
m_environment = QSharedPointer<Environment>(env);
}
Preprocessor preproc(0, m_environment.data());
return preproc.run("<expression>", utf8code);
}
namespace CPlusPlus {
ExpressionAST *extractExpressionAST(Document::Ptr doc)
{
if (! doc->translationUnit()->ast())
return 0;
return doc->translationUnit()->ast()->asExpression();
}
Document::Ptr documentForExpression(const QByteArray &utf8code)
{
// create the expression's AST.
Document::Ptr doc = Document::create(QLatin1String("<completion>"));
doc->setUtf8Source(utf8code);
doc->parse(Document::ParseExpression);
return doc;
}
} // namespace CPlusPlus
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