mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
104 lines
3.2 KiB
C++
104 lines
3.2 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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* @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 <memory>
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#include <variant>
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#include <vector>
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namespace 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(langutil::ErrorReporter& _errorReporter, Dialect const& _dialect):
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ParserBase(_errorReporter), m_dialect(_dialect) {}
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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::shared_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, dev::eth::Instruction> const& instructions();
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protected:
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using ElementaryOperation = std::variant<Instruction, Literal, Identifier, FunctionCall>;
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/// Creates an inline assembly node with the given source location.
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template <class T> T createWithLocation(langutil::SourceLocation const& _loc = {}) const
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{
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T r;
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r.location = _loc;
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if (r.location.isEmpty())
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{
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r.location.start = position();
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r.location.end = endPosition();
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}
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if (!r.location.source)
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r.location.source = m_scanner->charStream();
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return r;
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}
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langutil::SourceLocation location() const { return {position(), endPosition(), m_scanner->charStream()}; }
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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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static std::map<dev::eth::Instruction, std::string> const& instructionNames();
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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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ForLoopComponent m_currentForLoopComponent = ForLoopComponent::None;
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};
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}
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