mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
118 lines
4.1 KiB
C++
118 lines
4.1 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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* Component that translates Solidity code into Yul at statement level and below.
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*/
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#pragma once
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#include <libsolidity/ast/ASTVisitor.h>
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#include <libsolidity/codegen/ir/IRLValue.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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class IRGenerationContext;
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class YulUtilFunctions;
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/**
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* Component that translates Solidity's AST into Yul at statement level and below.
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* It is an AST visitor that appends to an internal string buffer.
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*/
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class IRGeneratorForStatements: public ASTConstVisitor
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{
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public:
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IRGeneratorForStatements(IRGenerationContext& _context, YulUtilFunctions& _utils):
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m_context(_context),
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m_utils(_utils)
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{}
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std::string code() const;
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/// Generates code to initialize the given state variable.
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void initializeStateVar(VariableDeclaration const& _varDecl);
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void endVisit(VariableDeclarationStatement const& _variableDeclaration) override;
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bool visit(Assignment const& _assignment) override;
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bool visit(TupleExpression const& _tuple) override;
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bool visit(IfStatement const& _ifStatement) override;
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bool visit(ForStatement const& _forStatement) override;
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bool visit(WhileStatement const& _whileStatement) override;
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bool visit(Continue const& _continueStatement) override;
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bool visit(Break const& _breakStatement) override;
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void endVisit(Return const& _return) override;
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void endVisit(UnaryOperation const& _unaryOperation) override;
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bool visit(BinaryOperation const& _binOp) override;
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void endVisit(FunctionCall const& _funCall) override;
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void endVisit(MemberAccess const& _memberAccess) override;
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bool visit(InlineAssembly const& _inlineAsm) override;
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void endVisit(IndexAccess const& _indexAccess) override;
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void endVisit(IndexRangeAccess const& _indexRangeAccess) override;
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void endVisit(Identifier const& _identifier) override;
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bool visit(Literal const& _literal) override;
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private:
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/// Appends code to call an external function with the given arguments.
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/// All involved expressions have already been visited.
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void appendExternalFunctionCall(
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FunctionCall const& _functionCall,
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std::vector<ASTPointer<Expression const>> const& _arguments
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);
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std::string fetchFreeMem() const;
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/// @returns a Yul expression representing the current value of @a _expression,
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/// converted to type @a _to if it does not yet have that type.
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std::string expressionAsType(Expression const& _expression, Type const& _to);
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std::ostream& defineExpression(Expression const& _expression);
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/// Defines only one of many variables corresponding to an expression.
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/// We start counting at 1 instead of 0.
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std::ostream& defineExpressionPart(Expression const& _expression, size_t _part);
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void appendAndOrOperatorCode(BinaryOperation const& _binOp);
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void appendSimpleUnaryOperation(UnaryOperation const& _operation, Expression const& _expr);
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/// @returns code to perform the given binary operation in the given type on the two values.
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std::string binaryOperation(
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langutil::Token _op,
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Type const& _type,
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std::string const& _left,
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std::string const& _right
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);
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void setLValue(Expression const& _expression, std::unique_ptr<IRLValue> _lvalue);
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void generateLoop(
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Statement const& _body,
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Expression const* _conditionExpression,
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Statement const* _initExpression = nullptr,
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ExpressionStatement const* _loopExpression = nullptr,
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bool _isDoWhile = false
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);
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static Type const& type(Expression const& _expression);
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std::ostringstream m_code;
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IRGenerationContext& m_context;
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YulUtilFunctions& m_utils;
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std::unique_ptr<IRLValue> m_currentLValue;
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};
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}
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}
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