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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/>.
*/
/**
* Yul dialect.
*/
#pragma once
#include <libyul/YulString.h>
#include <memory>
namespace yul
{
class YulString;
using Type = YulString;
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
};
struct BuiltinFunction
{
YulString name;
std::vector<Type> parameters;
std::vector<Type> returns;
bool movable;
};
/**
* Class to query for builtin functions and their semantics.
*/
struct Builtins
{
virtual ~Builtins() = default;
/// @returns the builtin function of the given name or a nullptr if it is not a builtin function.
virtual BuiltinFunction const* query(YulString /*_name*/) const { return nullptr; }
};
struct Dialect
{
AsmFlavour flavour = AsmFlavour::Loose;
std::shared_ptr<Builtins> builtins;
Dialect(AsmFlavour _flavour, std::shared_ptr<Builtins> _builtins):
flavour(_flavour), builtins(std::move(_builtins))
{}
static Dialect looseAssemblyForEVM()
{
return Dialect{AsmFlavour::Loose, std::make_shared<Builtins>()};
}
static Dialect strictAssemblyForEVM()
{
// The EVM instructions will be moved to builtins at some point.
return Dialect{AsmFlavour::Strict, std::make_shared<Builtins>()};
}
static Dialect yul()
{
// Will have to add builtins later.
return Dialect{AsmFlavour::Yul, std::make_shared<Builtins>()};
}
};
}
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