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/***************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Qt Software Information (qt-info@nokia.com)
**
**
** Non-Open Source Usage
**
** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
** agreement between you and Nokia.
**
** GNU General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt GPL Exception
** version 1.3, included in the file GPL_EXCEPTION.txt in this package.
**
***************************************************************************/
#include "TypeOfExpression.h"
#include <AST.h>
#include <TranslationUnit.h>
#include <cplusplus/LookupContext.h>
#include <cplusplus/ResolveExpression.h>
#include <cplusplus/pp.h>
#include <QSet>
using namespace CPlusPlus;
TypeOfExpression::TypeOfExpression():
m_ast(0)
{
}
Snapshot TypeOfExpression::snapshot() const
{
return m_snapshot;
}
void TypeOfExpression::setSnapshot(const Snapshot &documents)
{
m_snapshot = documents;
m_lookupContext = LookupContext();
}
QList<TypeOfExpression::Result> TypeOfExpression::operator()(const QString &expression,
Document::Ptr document,
Symbol *lastVisibleSymbol,
PreprocessMode mode)
{
QString code = expression;
if (mode == Preprocess)
code = preprocessedExpression(expression, m_snapshot, document);
Document::Ptr expressionDoc = documentForExpression(code);
m_ast = extractExpressionAST(expressionDoc);
m_lookupContext = LookupContext(lastVisibleSymbol, expressionDoc,
document, m_snapshot);
ResolveExpression resolveExpression(m_lookupContext);
return resolveExpression(m_ast);
}
QString TypeOfExpression::preprocess(const QString &expression,
Document::Ptr document) const
{
return preprocessedExpression(expression, m_snapshot, document);
}
ExpressionAST *TypeOfExpression::ast() const
{
return m_ast;
}
const LookupContext &TypeOfExpression::lookupContext() const
{
return m_lookupContext;
}
ExpressionAST *TypeOfExpression::expressionAST() const
{
return extractExpressionAST(m_lookupContext.expressionDocument());
}
ExpressionAST *TypeOfExpression::extractExpressionAST(Document::Ptr doc) const
{
if (! doc->translationUnit()->ast())
return 0;
return doc->translationUnit()->ast()->asExpression();
}
Document::Ptr TypeOfExpression::documentForExpression(const QString &expression) const
{
// create the expression's AST.
Document::Ptr doc = Document::create(QLatin1String("<completion>"));
const QByteArray bytes = expression.toUtf8();
doc->setSource(bytes);
doc->parse(Document::ParseExpression);
return doc;
}
void TypeOfExpression::processEnvironment(Snapshot documents,
Document::Ptr doc, Environment *env,
QSet<QString> *processed) const
{
if (! doc)
return;
if (processed->contains(doc->fileName()))
return;
processed->insert(doc->fileName());
foreach (const Document::Include &incl, doc->includes()) {
processEnvironment(documents,
documents.value(incl.fileName()),
env, processed);
}
foreach (const Macro ¯o, doc->definedMacros())
env->bind(macro);
}
QString TypeOfExpression::preprocessedExpression(const QString &expression,
Snapshot documents,
Document::Ptr thisDocument) const
{
Environment env;
QSet<QString> processed;
processEnvironment(documents, thisDocument,
&env, &processed);
const QByteArray code = expression.toUtf8();
Preprocessor preproc(0, env);
QByteArray preprocessedCode;
preproc("<expression>", code, &preprocessedCode);
return QString::fromUtf8(preprocessedCode);
}
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