mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
112 lines
3.3 KiB
C++
112 lines
3.3 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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/**
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* @author Christian <c@ethdev.com>
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* @date 2016
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* Solidity inline assembly parser.
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*/
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#pragma once
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#include <libyul/AsmData.h>
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#include <libyul/Dialect.h>
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#include <liblangutil/SourceLocation.h>
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#include <liblangutil/Scanner.h>
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#include <liblangutil/ParserBase.h>
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#include <libevmasm/Instruction.h>
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#include <memory>
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#include <variant>
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#include <vector>
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namespace solidity::yul
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{
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class Parser: public langutil::ParserBase
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{
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public:
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enum class ForLoopComponent
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{
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None, ForLoopPre, ForLoopPost, ForLoopBody
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};
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explicit Parser(
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langutil::ErrorReporter& _errorReporter,
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Dialect const& _dialect,
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std::optional<langutil::SourceLocation> _locationOverride = {}
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):
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ParserBase(_errorReporter),
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m_dialect(_dialect),
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m_locationOverride(std::move(_locationOverride))
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{}
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/// Parses an inline assembly block starting with `{` and ending with `}`.
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/// @param _reuseScanner if true, do check for end of input after the `}`.
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/// @returns an empty shared pointer on error.
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std::unique_ptr<Block> parse(std::shared_ptr<langutil::Scanner> const& _scanner, bool _reuseScanner);
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/// @returns a map of all EVM instructions available to assembly.
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static std::map<std::string, evmasm::Instruction> const& instructions();
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protected:
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using ElementaryOperation = std::variant<Literal, Identifier, FunctionCall>;
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langutil::SourceLocation currentLocation() const override
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{
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return m_locationOverride ? *m_locationOverride : ParserBase::currentLocation();
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}
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/// Creates an inline assembly node with the current source location.
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template <class T> T createWithLocation() const
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{
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T r;
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r.location = currentLocation();
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return r;
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}
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Block parseBlock();
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Statement parseStatement();
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Case parseCase();
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ForLoop parseForLoop();
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/// Parses a functional expression that has to push exactly one stack element
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Expression parseExpression();
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/// Parses an elementary operation, i.e. a literal, identifier, instruction or
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/// builtin functian call (only the name).
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ElementaryOperation parseElementaryOperation();
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VariableDeclaration parseVariableDeclaration();
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FunctionDefinition parseFunctionDefinition();
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Expression parseCall(ElementaryOperation&& _initialOp);
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TypedName parseTypedName();
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YulString expectAsmIdentifier();
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/// Reports an error if we are currently not inside the body part of a for loop.
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void checkBreakContinuePosition(std::string const& _which);
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static bool isValidNumberLiteral(std::string const& _literal);
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private:
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Dialect const& m_dialect;
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std::optional<langutil::SourceLocation> m_locationOverride;
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ForLoopComponent m_currentForLoopComponent = ForLoopComponent::None;
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bool m_insideFunction = false;
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};
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}
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