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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/>.
*/
/**
* @author Christian <c@ethdev.com>
* @date 2014
* Scope - object that holds declaration of names.
*/
#pragma once
#include <map>
#include <set>
#include <boost/noncopyable.hpp>
#include <libsolidity/ast/ASTForward.h>
namespace dev
{
namespace solidity
{
/**
* Container that stores mappings between names and declarations. It also contains a link to the
* enclosing scope.
*/
class DeclarationContainer
{
public:
explicit DeclarationContainer(
ASTNode const* _enclosingNode = nullptr,
DeclarationContainer const* _enclosingContainer = nullptr
):
m_enclosingNode(_enclosingNode), m_enclosingContainer(_enclosingContainer) {}
/// Registers the declaration in the scope unless its name is already declared or the name is empty.
/// @param _name the name to register, if nullptr the intrinsic name of @a _declaration is used.
/// @param _invisible if true, registers the declaration, reports name clashes but does not return it in @a resolveName
/// @param _update if true, replaces a potential declaration that is already present
/// @returns false if the name was already declared.
bool registerDeclaration(Declaration const& _declaration, ASTString const* _name = nullptr, bool _invisible = false, bool _update = false);
std::vector<Declaration const*> resolveName(ASTString const& _name, bool _recursive = false, bool _alsoInvisible = false) const;
ASTNode const* enclosingNode() const { return m_enclosingNode; }
DeclarationContainer const* enclosingContainer() const { return m_enclosingContainer; }
std::map<ASTString, std::vector<Declaration const*>> const& declarations() const { return m_declarations; }
/// @returns whether declaration is valid, and if not also returns previous declaration.
Declaration const* conflictingDeclaration(Declaration const& _declaration, ASTString const* _name = nullptr) const;
/// Activates a previously inactive (invisible) variable. To be used in C99 scoping for
/// VariableDeclarationStatements.
void activateVariable(ASTString const& _name);
/// @returns true if declaration is currently invisible.
bool isInvisible(ASTString const& _name) const;
/// @returns existing declaration names similar to @a _name.
/// Searches this and all parent containers.
std::vector<ASTString> similarNames(ASTString const& _name) const;
private:
ASTNode const* m_enclosingNode;
DeclarationContainer const* m_enclosingContainer;
std::map<ASTString, std::vector<Declaration const*>> m_declarations;
std::map<ASTString, std::vector<Declaration const*>> m_invisibleDeclarations;
};
}
}
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