/*

  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/>.

*/

// SPDX-License-Identifier: GPL-3.0

#pragma once

#include <libsolidity/ast/ASTVisitor.h>

#include <liblangutil/ErrorReporter.h>

#include <liblangutil/Exceptions.h>

namespace solidity::frontend::experimental

{

class Analysis;

class SyntaxRestrictor: public ASTConstVisitor

{

public:

  SyntaxRestrictor(Analysis& _analysis);

  bool analyze(ASTNode const& _astRoot);

private:

  /// Default visit will reject all AST nodes that are not explicitly allowed.

  bool visitNode(ASTNode const& _node) override;

  bool visit(SourceUnit const&) override { return true; }

  bool visit(PragmaDirective const&) override { return true; }

  bool visit(ImportDirective const&) override { return true; }

  bool visit(ContractDefinition const& _contractDefinition) override;

  bool visit(FunctionDefinition const& _functionDefinition) override;

  bool visit(ExpressionStatement const&) override { return true; }

  bool visit(FunctionCall const&) override { return true; }

  bool visit(Assignment const&) override { return true; }

  bool visit(Block const&) override { return true; }

  bool visit(InlineAssembly const&) override { return true; }

  bool visit(Identifier const&) override { return true; }

  bool visit(IdentifierPath const&) override { return true; }

  bool visit(IfStatement const&) override { return true; }

  bool visit(VariableDeclarationStatement const&) override;

  bool visit(VariableDeclaration const&) override;

  bool visit(ElementaryTypeName const&) override { return true; }

  bool visit(ParameterList const&) override { return true; }

  bool visit(Return const&) override { return true; }

  bool visit(MemberAccess const&) override { return true; }

  bool visit(BinaryOperation const&) override { return true; }

  bool visit(ElementaryTypeNameExpression const&) override { return true; }

  bool visit(TupleExpression const&) override { return true; }

  bool visit(Literal const&) override { return true; }

  langutil::ErrorReporter& m_errorReporter;

};

}