mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Yul dialect.
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*/
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#pragma once
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#include <libyul/YulString.h>
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#include <boost/noncopyable.hpp>
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#include <vector>
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namespace yul
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{
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class YulString;
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using Type = YulString;
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enum class AsmFlavour
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{
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Loose, // no types, EVM instructions as function, jumps and direct stack manipulations
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Strict, // no types, EVM instructions as functions, but no jumps and no direct stack manipulations
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Yul // same as Strict mode with types
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};
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struct BuiltinFunction
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{
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YulString name;
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std::vector<Type> parameters;
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std::vector<Type> returns;
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/// If true, calls to this function can be freely moved and copied (as long as their
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/// arguments are either variables or also movable) without altering the semantics.
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/// This means the function cannot depend on storage or memory, cannot have any side-effects,
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/// but it can depend on state that is constant across an EVM-call.
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bool movable = false;
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/// If true, can only accept literals as arguments and they cannot be moved to voriables.
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bool literalArguments = false;
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};
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struct Dialect: boost::noncopyable
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{
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AsmFlavour const flavour = AsmFlavour::Loose;
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/// @returns the builtin function of the given name or a nullptr if it is not a builtin function.
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virtual BuiltinFunction const* builtin(YulString /*_name*/) const { return nullptr; }
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Dialect(AsmFlavour _flavour): flavour(_flavour) {}
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virtual ~Dialect() = default;
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static std::shared_ptr<Dialect> yul()
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{
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// Will have to add builtins later.
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return std::make_shared<Dialect>(AsmFlavour::Yul);
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}
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};
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}
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