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/****************************************************************************
**
** Copyright (C) 2014 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.
**
****************************************************************************/
#ifndef CPLUSPLUS_TYPEOFEXPRESSION_H
#define CPLUSPLUS_TYPEOFEXPRESSION_H
#include "CppDocument.h"
#include "LookupContext.h"
#include "PreprocessorEnvironment.h"
#include <cplusplus/ASTfwd.h>
#include <QMap>
#include <QObject>
#include <QString>
#include <QByteArray>
namespace CPlusPlus {
class Environment;
class Macro;
class CPLUSPLUS_EXPORT TypeOfExpression
{
Q_DISABLE_COPY(TypeOfExpression)
public:
TypeOfExpression();
/**
* Sets the documents used to evaluate expressions. Should be set before
* calling this functor.
*
* Also clears the lookup context, so can be used to make sure references
* to the documents previously used are removed.
*/
void init(Document::Ptr thisDocument,
const Snapshot &snapshot,
QSharedPointer<CreateBindings> bindings = QSharedPointer<CreateBindings>(),
const QSet<const Declaration *> &autoDeclarationsBeingResolved
= QSet<const Declaration *>());
enum PreprocessMode {
NoPreprocess,
Preprocess
};
/**
* Returns a list of possible fully specified types associated with the
* given expression.
*
* NOTE: The fully specified types only stay valid for as long as this
* expression evaluator instance still exists, and no new call to evaluate
* has been made!
*
* @param utf8code The code of expression to evaluate.
* @param scope The scope enclosing the expression.
*/
QList<LookupItem> operator()(const QByteArray &utf8code,
Scope *scope,
PreprocessMode mode = NoPreprocess);
/**
* Returns a list of possible fully specified types associated with the
* given expression AST from the given document.
*
* NOTE: The fully specified types only stay valid for as long as this
* expression evaluator instance still exists, and no new call to evaluate
* has been made!
*
* @param expression The expression to evaluate.
* @param document The document in which the expression lives.
* @param scope The scope enclosing the expression.
*/
QList<LookupItem> operator()(ExpressionAST *expression,
Document::Ptr document,
Scope *scope);
QList<LookupItem> reference(const QByteArray &utf8code,
Scope *scope,
PreprocessMode mode = NoPreprocess);
QList<LookupItem> reference(ExpressionAST *expression,
Document::Ptr document,
Scope *scope);
// Returns UTF-8.
QByteArray preprocess(const QByteArray &utf8code) const;
/**
* Returns the AST of the last evaluated expression.
*/
ExpressionAST *ast() const;
/**
* Returns the lookup context of the last evaluated expression.
*/
const LookupContext &context() const;
Scope *scope() const;
ExpressionAST *expressionAST() const;
QByteArray preprocessedExpression(const QByteArray &utf8code) const;
void setExpandTemplates(bool expandTemplates)
{
if (m_bindings)
m_bindings->setExpandTemplates(expandTemplates);
m_expandTemplates = expandTemplates;
}
private:
void processEnvironment(Document::Ptr doc, Environment *env,
QSet<QString> *processed) const;
private:
Document::Ptr m_thisDocument;
Snapshot m_snapshot;
QSharedPointer<CreateBindings> m_bindings;
ExpressionAST *m_ast;
Scope *m_scope;
LookupContext m_lookupContext;
mutable QSharedPointer<Environment> m_environment;
bool m_expandTemplates;
// FIXME: This is a temporary hack to avoid dangling pointers.
// Keep the expression documents and thus all the symbols and
// their types alive until they are not needed any more.
QList<Document::Ptr> m_documents;
QSet<const Declaration *> m_autoDeclarationsBeingResolved;
};
ExpressionAST CPLUSPLUS_EXPORT *extractExpressionAST(Document::Ptr doc);
Document::Ptr CPLUSPLUS_EXPORT documentForExpression(const QByteArray &utf8code);
} // namespace CPlusPlus
#endif // CPLUSPLUS_TYPEOFEXPRESSION_H
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