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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
* Component that resolves type names to types and annotates the AST accordingly.
*/
#pragma once
#include <map>
#include <list>
#include <boost/noncopyable.hpp>
#include <libsolidity/ast/ASTVisitor.h>
#include <libsolidity/ast/ASTAnnotations.h>
namespace dev
{
namespace solidity
{
class NameAndTypeResolver;
/**
* Resolves references to declarations (of variables and types) and also establishes the link
* between a return statement and the return parameter list.
*/
class ReferencesResolver: private ASTConstVisitor
{
public:
ReferencesResolver(
ErrorList& _errors,
NameAndTypeResolver& _resolver,
ParameterList const* _returnParameters,
bool _resolveInsideCode = false
):
m_errors(_errors),
m_resolver(_resolver),
m_returnParameters(_returnParameters),
m_resolveInsideCode(_resolveInsideCode)
{}
/// @returns true if no errors during resolving
bool resolve(ASTNode const& _root);
private:
virtual bool visit(Block const&) override { return m_resolveInsideCode; }
virtual bool visit(Identifier const& _identifier) override;
virtual bool visit(ElementaryTypeName const& _typeName) override;
virtual void endVisit(UserDefinedTypeName const& _typeName) override;
virtual void endVisit(FunctionTypeName const& _typeName) override;
virtual void endVisit(Mapping const& _typeName) override;
virtual void endVisit(ArrayTypeName const& _typeName) override;
virtual bool visit(InlineAssembly const& _inlineAssembly) override;
virtual bool visit(Return const& _return) override;
virtual void endVisit(VariableDeclaration const& _variable) override;
/// Adds a new error to the list of errors.
void typeError(SourceLocation const& _location, std::string const& _description);
/// Adds a new error to the list of errors and throws to abort type checking.
void fatalTypeError(SourceLocation const& _location, std::string const& _description);
/// Adds a new error to the list of errors.
void declarationError(const SourceLocation& _location, std::string const& _description);
/// Adds a new error to the list of errors and throws to abort type checking.
void fatalDeclarationError(const SourceLocation& _location, std::string const& _description);
ErrorList& m_errors;
NameAndTypeResolver& m_resolver;
ParameterList const* m_returnParameters;
bool const m_resolveInsideCode;
bool m_errorOccurred = false;
};
}
}
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