solidity/libyul/optimiser/ASTWalker.h

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/*
This file is part of solidity.
solidity 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.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Generic AST walker.
*/
#pragma once
#include <libyul/AsmDataForward.h>
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#include <libyul/Exceptions.h>
#include <libyul/YulString.h>
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#include <map>
#include <optional>
#include <set>
#include <vector>
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namespace yul
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{
/**
* Generic AST walker.
*/
class ASTWalker
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{
public:
virtual ~ASTWalker() = default;
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virtual void operator()(Literal const&) {}
virtual void operator()(Identifier const&) {}
virtual void operator()(FunctionCall const& _funCall);
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virtual void operator()(ExpressionStatement const& _statement);
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virtual void operator()(Assignment const& _assignment);
virtual void operator()(VariableDeclaration const& _varDecl);
virtual void operator()(If const& _if);
virtual void operator()(Switch const& _switch);
virtual void operator()(FunctionDefinition const&);
virtual void operator()(ForLoop const&);
virtual void operator()(Break const&) {}
virtual void operator()(Continue const&) {}
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virtual void operator()(Leave const&) {}
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virtual void operator()(Block const& _block);
virtual void visit(Statement const& _st);
virtual void visit(Expression const& _e);
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protected:
template <class T>
void walkVector(T const& _statements)
{
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for (auto const& statement: _statements)
visit(statement);
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}
};
/**
* Generic AST modifier (i.e. non-const version of ASTWalker).
*/
class ASTModifier
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{
public:
virtual ~ASTModifier() = default;
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virtual void operator()(Literal&) {}
virtual void operator()(Identifier&) {}
virtual void operator()(FunctionCall& _funCall);
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virtual void operator()(ExpressionStatement& _statement);
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virtual void operator()(Assignment& _assignment);
virtual void operator()(VariableDeclaration& _varDecl);
virtual void operator()(If& _if);
virtual void operator()(Switch& _switch);
virtual void operator()(FunctionDefinition&);
virtual void operator()(ForLoop&);
virtual void operator()(Break&);
virtual void operator()(Continue&);
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virtual void operator()(Leave&);
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virtual void operator()(Block& _block);
virtual void visit(Statement& _st);
virtual void visit(Expression& _e);
protected:
template <class T>
void walkVector(T&& _statements)
{
for (auto& st: _statements)
visit(st);
}
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};
}