/*
	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 2016
 * Forward declaration of classes for inline assembly / Yul AST
 */

#pragma once

#include <boost/variant.hpp>

namespace yul
{

struct Instruction;
struct Literal;
struct Label;
struct StackAssignment;
struct Identifier;
struct Assignment;
struct VariableDeclaration;
struct FunctionalInstruction;
struct FunctionDefinition;
struct FunctionCall;
struct If;
struct Switch;
struct Case;
struct ForLoop;
struct ExpressionStatement;
struct Block;

struct TypedName;

using Expression = boost::variant<FunctionalInstruction, FunctionCall, Identifier, Literal>;
using Statement = boost::variant<ExpressionStatement, Instruction, Label, StackAssignment, Assignment, VariableDeclaration, FunctionDefinition, If, Switch, ForLoop, Block>;

enum class AsmFlavour
{
	Loose,  // no types, EVM instructions as function, jumps and direct stack manipulations
	Strict, // no types, EVM instructions as functions, but no jumps and no direct stack manipulations
	Yul     // same as Strict mode with types
};

}