mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
105 lines
3.6 KiB
C++
105 lines
3.6 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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* EVM versioning.
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*/
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#pragma once
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#include <libevmasm/Instruction.h>
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#include <string>
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#include <boost/optional.hpp>
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#include <boost/operators.hpp>
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namespace langutil
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{
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/**
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* A version specifier of the EVM we want to compile to.
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* Defaults to the latest version deployed on Ethereum mainnet at the time of compiler release.
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*/
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class EVMVersion:
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boost::less_than_comparable<EVMVersion>,
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boost::equality_comparable<EVMVersion>
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{
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public:
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EVMVersion() = default;
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static EVMVersion homestead() { return {Version::Homestead}; }
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static EVMVersion tangerineWhistle() { return {Version::TangerineWhistle}; }
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static EVMVersion spuriousDragon() { return {Version::SpuriousDragon}; }
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static EVMVersion byzantium() { return {Version::Byzantium}; }
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static EVMVersion constantinople() { return {Version::Constantinople}; }
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static EVMVersion petersburg() { return {Version::Petersburg}; }
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static EVMVersion istanbul() { return {Version::Istanbul}; }
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static EVMVersion berlin() { return {Version::Berlin}; }
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static boost::optional<EVMVersion> fromString(std::string const& _version)
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{
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for (auto const& v: {homestead(), tangerineWhistle(), spuriousDragon(), byzantium(), constantinople(), petersburg(), istanbul(), berlin()})
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if (_version == v.name())
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return v;
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return {};
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}
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bool operator==(EVMVersion const& _other) const { return m_version == _other.m_version; }
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bool operator<(EVMVersion const& _other) const { return m_version < _other.m_version; }
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std::string name() const
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{
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switch (m_version)
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{
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case Version::Homestead: return "homestead";
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case Version::TangerineWhistle: return "tangerineWhistle";
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case Version::SpuriousDragon: return "spuriousDragon";
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case Version::Byzantium: return "byzantium";
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case Version::Constantinople: return "constantinople";
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case Version::Petersburg: return "petersburg";
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case Version::Istanbul: return "istanbul";
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case Version::Berlin: return "berlin";
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}
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return "INVALID";
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}
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/// Has the RETURNDATACOPY and RETURNDATASIZE opcodes.
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bool supportsReturndata() const { return *this >= byzantium(); }
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bool hasStaticCall() const { return *this >= byzantium(); }
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bool hasBitwiseShifting() const { return *this >= constantinople(); }
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bool hasCreate2() const { return *this >= constantinople(); }
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bool hasExtCodeHash() const { return *this >= constantinople(); }
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bool hasChainID() const { return *this >= istanbul(); }
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bool hasSelfBalance() const { return *this >= istanbul(); }
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bool hasOpcode(dev::eth::Instruction _opcode) const;
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/// Whether we have to retain the costs for the call opcode itself (false),
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/// or whether we can just forward easily all remaining gas (true).
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bool canOverchargeGasForCall() const { return *this >= tangerineWhistle(); }
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private:
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enum class Version { Homestead, TangerineWhistle, SpuriousDragon, Byzantium, Constantinople, Petersburg, Istanbul, Berlin };
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EVMVersion(Version _version): m_version(_version) {}
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Version m_version = Version::Petersburg;
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};
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}
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