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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 '_'
* - issues deprecation warnings for unary '+'
* - issues deprecation warning for throw
*/
class SyntaxChecker: private ASTConstVisitor
{
public:
/// @param _errorReporter provides the error logging functionality.
SyntaxChecker(ErrorReporter& _errorReporter): m_errorReporter(_errorReporter) {}
bool checkSyntax(ASTNode const& _astRoot);
private:
bool visit(SourceUnit const& _sourceUnit) override;
void endVisit(SourceUnit const& _sourceUnit) override;
bool visit(PragmaDirective const& _pragma) override;
bool visit(ModifierDefinition const& _modifier) override;
void endVisit(ModifierDefinition const& _modifier) override;
/// Reports an error if _statement is a VariableDeclarationStatement.
/// Used by if/while/for to check for single statement variable declarations
/// without a block.
void checkSingleStatementVariableDeclaration(ASTNode const& _statement);
bool visit(IfStatement const& _ifStatement) override;
bool visit(WhileStatement const& _whileStatement) override;
void endVisit(WhileStatement const& _whileStatement) override;
bool visit(ForStatement const& _forStatement) override;
void endVisit(ForStatement const& _forStatement) override;
bool visit(Continue const& _continueStatement) override;
bool visit(Break const& _breakStatement) override;
bool visit(Throw const& _throwStatement) override;
bool visit(UnaryOperation const& _operation) override;
bool visit(PlaceholderStatement const& _placeholderStatement) override;
bool visit(ContractDefinition const& _contract) override;
bool visit(FunctionDefinition const& _function) override;
bool visit(FunctionTypeName const& _node) override;
bool visit(VariableDeclarationStatement const& _statement) override;
bool visit(StructDefinition const& _struct) override;
bool visit(Literal const& _literal) override;
ErrorReporter& m_errorReporter;
/// 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;
bool m_isInterface = false;
SourceUnit const* m_sourceUnit = nullptr;
};
}
}
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