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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#include "findcursorusr.h"
#if defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wunused-parameter"
#elif defined(_MSC_VER)
# pragma warning(push)
# pragma warning( disable : 4100 )
#endif
#include <clang/AST/ASTContext.h>
#include <clang/AST/RecursiveASTVisitor.h>
#include <clang/Basic/SourceLocation.h>
#include <clang/Index/USRGeneration.h>
#include <llvm/ADT/SmallVector.h>
#if defined(__GNUC__)
# pragma GCC diagnostic pop
#elif defined(_MSC_VER)
# pragma warning(pop)
#endif
#include <vector>
namespace ClangBackEnd {
class FindLocationsOfUSRsASTVisitor : public clang::RecursiveASTVisitor<FindLocationsOfUSRsASTVisitor>
{
public:
explicit FindLocationsOfUSRsASTVisitor(const std::vector<USRName> &unifiedSymbolResolutions)
: unifiedSymbolResolutions(unifiedSymbolResolutions)
{
}
bool VisitNamedDecl(const clang::NamedDecl *declaration) {
auto declarationUSR = USROfDeclaration(declaration);
if (containsUSR(declarationUSR))
foundLocations.push_back(declaration->getLocation());
return true;
}
bool VisitDeclRefExpr(const clang::DeclRefExpr *expression) {
const auto *declaration = expression->getFoundDecl();
iterateNestedNameSpecifierLocation(expression->getQualifierLoc());
auto declarationUSR = USROfDeclaration(declaration);
if (containsUSR(declarationUSR))
foundLocations.push_back(expression->getLocation());
return true;
}
bool VisitMemberExpr(const clang::MemberExpr *expression) {
const auto *declaration = expression->getFoundDecl().getDecl();
auto declarationUSR = USROfDeclaration(declaration);
if (containsUSR(declarationUSR))
foundLocations.push_back(expression->getMemberLoc());
return true;
}
bool shouldVisitTemplateInstantiations() const
{
return true;
}
std::vector<clang::SourceLocation> takeFoundLocations() const {
return std::move(foundLocations);
}
private:
void iterateNestedNameSpecifierLocation(clang::NestedNameSpecifierLoc nameLocation) {
while (nameLocation) {
const auto *declaration = nameLocation.getNestedNameSpecifier()->getAsNamespace();
if (declaration && containsUSR(USROfDeclaration(declaration)))
foundLocations.push_back(nameLocation.getLocalBeginLoc());
nameLocation = nameLocation.getPrefix();
}
}
bool containsUSR(const USRName &unifiedSymbolResolution)
{
auto found = std::find(unifiedSymbolResolutions.cbegin(),
unifiedSymbolResolutions.cend(),
unifiedSymbolResolution);
return found != unifiedSymbolResolutions.cend();
}
private:
// All the locations of the USR were found.
const std::vector<USRName> unifiedSymbolResolutions;
std::vector<clang::SourceLocation> foundLocations;
};
inline
std::vector<clang::SourceLocation> takeLocationsOfUSRs(std::vector<USRName> &unifiedSymbolResolutions,
clang::Decl *declartation)
{
FindLocationsOfUSRsASTVisitor visitor(unifiedSymbolResolutions);
visitor.TraverseDecl(declartation);
return visitor.takeFoundLocations();
}
} // namespace ClangBackend
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