mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
118 lines
3.4 KiB
C++
118 lines
3.4 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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* Simplified in-memory representation of a Wasm AST.
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*/
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#pragma once
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#include <libsolutil/Common.h>
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#include <variant>
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#include <string>
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#include <vector>
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#include <map>
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#include <memory>
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#include <optional>
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namespace solidity::yul::wasm
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{
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enum class Type
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{
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i32,
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i64,
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};
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struct TypedName { std::string name; Type type; };
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using TypedNameList = std::vector<TypedName>;
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struct Literal;
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struct StringLiteral;
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struct LocalVariable;
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struct GlobalVariable;
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struct FunctionCall;
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struct BuiltinCall;
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struct LocalAssignment;
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struct GlobalAssignment;
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struct Block;
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struct If;
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struct Loop;
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struct Branch;
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struct BranchIf;
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struct Return;
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using Expression = std::variant<
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Literal, StringLiteral, LocalVariable, GlobalVariable,
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FunctionCall, BuiltinCall, LocalAssignment, GlobalAssignment,
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Block, If, Loop, Branch, BranchIf, Return
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>;
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struct Literal { std::variant<uint32_t, uint64_t> value; };
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// This is a special AST element used for certain builtins. It is not mapped to actual WebAssembly.
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struct StringLiteral { std::string value; };
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struct LocalVariable { std::string name; };
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struct GlobalVariable { std::string name; };
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struct Label { std::string name; };
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struct FunctionCall { std::string functionName; std::vector<Expression> arguments; };
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struct BuiltinCall { std::string functionName; std::vector<Expression> arguments; };
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struct LocalAssignment { std::string variableName; std::unique_ptr<Expression> value; };
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struct GlobalAssignment { std::string variableName; std::unique_ptr<Expression> value; };
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struct Block { std::string labelName; std::vector<Expression> statements; };
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struct If {
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std::unique_ptr<Expression> condition;
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std::vector<Expression> statements;
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std::unique_ptr<std::vector<Expression>> elseStatements;
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};
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struct Loop { std::string labelName; std::vector<Expression> statements; };
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struct Branch { Label label; };
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struct Return {};
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struct BranchIf { Label label; std::unique_ptr<Expression> condition; };
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struct VariableDeclaration { std::string variableName; Type type; };
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struct GlobalVariableDeclaration { std::string variableName; Type type; };
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struct FunctionImport {
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std::string module;
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std::string externalName;
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std::string internalName;
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std::vector<Type> paramTypes;
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std::optional<Type> returnType;
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};
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struct FunctionDefinition
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{
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std::string name;
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std::vector<TypedName> parameters;
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std::optional<Type> returnType;
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std::vector<VariableDeclaration> locals;
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std::vector<Expression> body;
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};
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/**
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* Abstract representation of a wasm module.
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*/
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struct Module
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{
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std::vector<GlobalVariableDeclaration> globals;
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std::vector<FunctionImport> imports;
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std::vector<FunctionDefinition> functions;
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std::map<std::string, Module> subModules;
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std::map<std::string, bytes> customSections;
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};
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}
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