mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
94 lines
2.5 KiB
C++
94 lines
2.5 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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// SPDX-License-Identifier: GPL-3.0
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#pragma once
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#include <libyul/Exceptions.h>
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#include <optional>
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#include <string>
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#include <set>
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namespace solidity::yul
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{
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struct Dialect;
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struct Block;
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class YulString;
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class NameDispenser;
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struct OptimiserStepContext
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{
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Dialect const& dialect;
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NameDispenser& dispenser;
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std::set<YulString> const& reservedIdentifiers;
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/// The value nullopt represents creation code
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std::optional<size_t> expectedExecutionsPerDeployment;
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};
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/**
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* Construction to create dynamically callable objects out of the
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* statically callable optimiser steps.
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*/
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struct OptimiserStep
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{
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explicit OptimiserStep(std::string _name): name(std::move(_name)) {}
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virtual ~OptimiserStep() = default;
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virtual void run(OptimiserStepContext&, Block&) const = 0;
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/// @returns non-nullopt if the step cannot be run, for example because it requires
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/// an SMT solver to be loaded, but none is available. In that case, the string
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/// contains a human-readable reason.
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virtual std::optional<std::string> invalidInCurrentEnvironment() const = 0;
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std::string name;
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};
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template <class Step>
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struct OptimiserStepInstance: public OptimiserStep
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{
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private:
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template<typename T>
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struct HasInvalidInCurrentEnvironmentMethod
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{
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private:
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template<typename U> static auto test(int) -> decltype(U::invalidInCurrentEnvironment(), std::true_type());
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template<typename> static std::false_type test(...);
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public:
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static constexpr bool value = decltype(test<T>(0))::value;
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};
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public:
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OptimiserStepInstance(): OptimiserStep{Step::name} {}
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void run(OptimiserStepContext& _context, Block& _ast) const override
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{
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Step::run(_context, _ast);
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}
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std::optional<std::string> invalidInCurrentEnvironment() const override
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{
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if constexpr (HasInvalidInCurrentEnvironmentMethod<Step>::value)
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return Step::invalidInCurrentEnvironment();
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else
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return std::nullopt;
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}
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};
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}
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