path: root/libsolidity/inlineasm/AsmScopeFiller.h

/*
    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/>.
*/
/**
 * Module responsible for registering identifiers inside their scopes.
 */

#pragma once

#include <libsolidity/inlineasm/AsmDataForward.h>

#include <boost/variant.hpp>

#include <functional>
#include <memory>

namespace dev
{
struct SourceLocation;
namespace solidity
{
class ErrorReporter;
namespace assembly
{

struct TypedName;
struct Scope;
struct AsmAnalysisInfo;

/**
 * Fills scopes with identifiers and checks for name clashes.
 * Does not resolve references.
 */
class ScopeFiller: public boost::static_visitor<bool>
{
public:
    ScopeFiller(AsmAnalysisInfo& _info, ErrorReporter& _errorReporter);

    bool operator()(assembly::Instruction const&) { return true; }
    bool operator()(assembly::Literal const&) { return true; }
    bool operator()(assembly::Identifier const&) { return true; }
    bool operator()(assembly::FunctionalInstruction const&) { return true; }
    bool operator()(assembly::ExpressionStatement const& _expr);
    bool operator()(assembly::Label const& _label);
    bool operator()(assembly::StackAssignment const&) { return true; }
    bool operator()(assembly::Assignment const&) { return true; }
    bool operator()(assembly::VariableDeclaration const& _variableDeclaration);
    bool operator()(assembly::FunctionDefinition const& _functionDefinition);
    bool operator()(assembly::FunctionCall const&) { return true; }
    bool operator()(assembly::If const& _if);
    bool operator()(assembly::Switch const& _switch);
    bool operator()(assembly::ForLoop const& _forLoop);
    bool operator()(assembly::Block const& _block);

private:
    bool registerVariable(
        TypedName const& _name,
        SourceLocation const& _location,
        Scope& _scope
    );

    Scope& scope(assembly::Block const* _block);

    Scope* m_currentScope = nullptr;
    AsmAnalysisInfo& m_info;
    ErrorReporter& m_errorReporter;
};

}
}
}