mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
80 lines
2.9 KiB
C++
80 lines
2.9 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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* Parsed inline assembly to be used by the AST
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*/
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#pragma once
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#include <boost/variant.hpp>
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#include <libevmasm/Instruction.h>
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#include <libevmasm/SourceLocation.h>
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namespace dev
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{
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namespace solidity
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{
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namespace assembly
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{
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/// What follows are the AST nodes for assembly.
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/// Direct EVM instruction (except PUSHi and JUMPDEST)
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struct Instruction { SourceLocation location; solidity::Instruction instruction; };
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/// Literal number or string (up to 32 bytes)
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struct Literal { SourceLocation location; bool isNumber; std::string value; };
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/// External / internal identifier or label reference
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struct Identifier { SourceLocation location; std::string name; };
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struct FunctionalInstruction;
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/// Jump label ("name:")
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struct Label { SourceLocation location; std::string name; };
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/// Assignemnt (":= x", moves stack top into x, potentially multiple slots)
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struct Assignment { SourceLocation location; Identifier variableName; };
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struct FunctionalAssignment;
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struct VariableDeclaration;
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struct Block;
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using Statement = boost::variant<Instruction, Literal, Label, Assignment, Identifier, FunctionalAssignment, FunctionalInstruction, VariableDeclaration, Block>;
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/// Functional assignment ("x := mload(20)", expects push-1-expression on the right hand
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/// side and requires x to occupy exactly one stack slot.
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struct FunctionalAssignment { SourceLocation location; Identifier variableName; std::shared_ptr<Statement> value; };
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/// Functional instruction, e.g. "mul(mload(20), add(2, x))"
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struct FunctionalInstruction { SourceLocation location; Instruction instruction; std::vector<Statement> arguments; };
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/// Block-scope variable declaration ("let x := mload(20)"), non-hoisted
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struct VariableDeclaration { SourceLocation location; std::string name; std::shared_ptr<Statement> value; };
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/// Block that creates a scope (frees declared stack variables)
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struct Block { SourceLocation location; std::vector<Statement> statements; };
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struct LocationExtractor: boost::static_visitor<SourceLocation>
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{
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template <class T> SourceLocation operator()(T const& _node) const
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{
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return _node.location;
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}
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};
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/// Extracts the source location from an inline assembly node.
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template <class T> inline SourceLocation locationOf(T const& _node)
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{
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return boost::apply_visitor(LocationExtractor(), _node);
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}
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}
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}
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}
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