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Utility class to find a suitable AST node for a given location.

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chriseth 2015-04-29 15:52:56 +02:00
parent a508d29489
commit 8a1758e605
2 changed files with 102 additions and 0 deletions
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ASTUtils.cpp Normal file
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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2015
* Utilities to work with the AST.
*/
#include <libsolidity/ASTUtils.h>
using namespace std;
using namespace dev;
using namespace dev::solidity;
ASTNode const* LocationFinder::leastUpperBound()
{
m_bestMatch = nullptr;
for (ASTNode const* rootNode: m_rootNodes)
rootNode->accept(*this);
return m_bestMatch;
}
bool LocationFinder::visitNode(const ASTNode& _node)
{
if (_node.getLocation().contains(m_location))
{
m_bestMatch = &_node;
return true;
}
return false;
}

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ASTUtils.h Normal file
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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2015
* Utilities to work with the AST.
*/
#pragma once
#include <libevmcore/SourceLocation.h>
#include <libsolidity/ASTVisitor.h>
namespace dev
{
namespace solidity
{
class LocationFinder: private ASTConstVisitor
{
public:
LocationFinder(SourceLocation const& _location, std::vector<ASTNode const*> _rootNodes):
m_rootNodes(_rootNodes), m_location(_location)
{
}
/// @returns the "closest" (in the sense of most-leafward) AST node which is a descendant of
/// _node and whose source location contains _location.
ASTNode const* leastUpperBound();
private:
bool visitNode(ASTNode const& _node);
std::vector<ASTNode const*> m_rootNodes;
SourceLocation m_location;
ASTNode const* m_bestMatch = nullptr;
};
}
}