mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/*
|
|
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 <boost/noncopyable.hpp>
|
|
|
|
#include <vector>
|
|
|
|
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;
|
|
/// If true, calls to this function can be freely moved and copied (as long as their
|
|
/// arguments are either variables or also movable) without altering the semantics.
|
|
/// This means the function cannot depend on storage or memory, cannot have any side-effects,
|
|
/// but it can depend on state that is constant across an EVM-call.
|
|
bool movable = false;
|
|
/// If true, a call to this function can be omitted without changing semantics.
|
|
bool sideEffectFree = false;
|
|
/// If true, can only accept literals as arguments and they cannot be moved to variables.
|
|
bool literalArguments = false;
|
|
};
|
|
|
|
struct Dialect: boost::noncopyable
|
|
{
|
|
AsmFlavour const flavour = AsmFlavour::Loose;
|
|
/// @returns the builtin function of the given name or a nullptr if it is not a builtin function.
|
|
virtual BuiltinFunction const* builtin(YulString /*_name*/) const { return nullptr; }
|
|
|
|
Dialect(AsmFlavour _flavour): flavour(_flavour) {}
|
|
virtual ~Dialect() = default;
|
|
|
|
static std::shared_ptr<Dialect> yul()
|
|
{
|
|
// Will have to add builtins later.
|
|
return std::make_shared<Dialect>(AsmFlavour::Yul);
|
|
}
|
|
};
|
|
|
|
}
|