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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/>.
*/
#pragma once
#include <libsolidity/analysis/TypeChecker.h>
#include <libsolidity/ast/Types.h>
#include <libsolidity/ast/ASTAnnotations.h>
#include <libsolidity/ast/ASTForward.h>
#include <libsolidity/ast/ASTVisitor.h>
namespace dev
{
namespace solidity
{
/**
* The module that performs syntax analysis on the AST:
* - whether continue/break is in a for/while loop.
* - whether a modifier contains at least one '_'
*/
class SyntaxChecker: private ASTConstVisitor
{
public:
/// @param _errors the reference to the list of errors and warnings to add them found during type checking.
SyntaxChecker(ErrorList& _errors): m_errors(_errors) {}
bool checkSyntax(ASTNode const& _astRoot);
private:
/// Adds a new error to the list of errors.
void syntaxError(SourceLocation const& _location, std::string const& _description);
virtual bool visit(SourceUnit const& _sourceUnit) override;
virtual void endVisit(SourceUnit const& _sourceUnit) override;
virtual bool visit(PragmaDirective const& _pragma) override;
virtual bool visit(ModifierDefinition const& _modifier) override;
virtual void endVisit(ModifierDefinition const& _modifier) override;
virtual bool visit(WhileStatement const& _whileStatement) override;
virtual void endVisit(WhileStatement const& _whileStatement) override;
virtual bool visit(ForStatement const& _forStatement) override;
virtual void endVisit(ForStatement const& _forStatement) override;
virtual bool visit(Continue const& _continueStatement) override;
virtual bool visit(Break const& _breakStatement) override;
virtual bool visit(PlaceholderStatement const& _placeholderStatement) override;
ErrorList& m_errors;
/// Flag that indicates whether a function modifier actually contains '_'.
bool m_placeholderFound = false;
/// Flag that indicates whether some version pragma was present.
bool m_versionPragmaFound = false;
int m_inLoopDepth = 0;
};
}
}
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