mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
93 lines
2.8 KiB
C++
93 lines
2.8 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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* Full-stack Solidity inline assember.
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*/
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#pragma once
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#include <libsolidity/interface/Exceptions.h>
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#include <string>
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#include <functional>
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namespace dev
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{
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namespace eth
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{
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class Assembly;
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}
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namespace solidity
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{
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class Scanner;
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namespace assembly
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{
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struct Block;
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struct Identifier;
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enum class IdentifierContext { LValue, RValue };
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/// Object that is used to resolve references and generate code for access to identifiers external
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/// to inline assembly (not used in standalone assembly mode).
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struct ExternalIdentifierAccess
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{
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using Resolver = std::function<size_t(assembly::Identifier const&, IdentifierContext)>;
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/// Resolve a an external reference given by the identifier in the given context.
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/// @returns the size of the value (number of stack slots) or size_t(-1) if not found.
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Resolver resolve;
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using CodeGenerator = std::function<void(assembly::Identifier const&, IdentifierContext, eth::Assembly&)>;
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/// Generate code for retrieving the value (rvalue context) or storing the value (lvalue context)
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/// of an identifier. The code should be appended to the assembly. In rvalue context, the value is supposed
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/// to be put onto the stack, in lvalue context, the value is assumed to be at the top of the stack.
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CodeGenerator generateCode;
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};
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class InlineAssemblyStack
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{
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public:
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/// Parse the given inline assembly chunk starting with `{` and ending with the corresponding `}`.
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/// @return false or error.
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bool parse(
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std::shared_ptr<Scanner> const& _scanner,
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ExternalIdentifierAccess::Resolver const& _externalIdentifierResolver = ExternalIdentifierAccess::Resolver()
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);
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/// Converts the parser result back into a string form (not necessarily the same form
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/// as the source form, but it should parse into the same parsed form again).
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std::string toString();
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eth::Assembly assemble();
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/// Parse and assemble a string in one run - for use in Solidity code generation itself.
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bool parseAndAssemble(
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std::string const& _input,
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eth::Assembly& _assembly,
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ExternalIdentifierAccess const& _identifierAccess = ExternalIdentifierAccess()
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);
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ErrorList const& errors() const { return m_errors; }
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private:
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std::shared_ptr<Block> m_parserResult;
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ErrorList m_errors;
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};
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}
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}
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}
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