mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
104 lines
3.1 KiB
C++
104 lines
3.1 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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* Analysis part of inline assembly.
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*/
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#pragma once
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#include <libsolidity/inlineasm/AsmStack.h>
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#include <libsolidity/interface/Exceptions.h>
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#include <boost/variant.hpp>
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#include <functional>
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#include <memory>
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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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struct Literal;
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struct Block;
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struct Label;
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struct FunctionalInstruction;
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struct FunctionalAssignment;
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struct VariableDeclaration;
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struct Instruction;
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struct Identifier;
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struct Assignment;
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struct FunctionDefinition;
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struct FunctionCall;
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struct Scope;
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struct AsmAnalysisInfo;
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/**
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* Performs the full analysis stage, calls the ScopeFiller internally, then resolves
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* references and performs other checks.
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* If all these checks pass, code generation should not throw errors.
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*/
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class AsmAnalyzer: public boost::static_visitor<bool>
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{
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public:
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AsmAnalyzer(
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AsmAnalysisInfo& _analysisInfo,
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ErrorList& _errors,
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ExternalIdentifierAccess::Resolver const& _resolver = ExternalIdentifierAccess::Resolver()
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);
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bool analyze(assembly::Block const& _block);
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bool operator()(assembly::Instruction const&);
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bool operator()(assembly::Literal const& _literal);
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bool operator()(assembly::Identifier const&);
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bool operator()(assembly::FunctionalInstruction const& _functionalInstruction);
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bool operator()(assembly::Label const& _label);
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bool operator()(assembly::Assignment const&);
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bool operator()(assembly::FunctionalAssignment const& _functionalAssignment);
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bool operator()(assembly::VariableDeclaration const& _variableDeclaration);
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bool operator()(assembly::FunctionDefinition const& _functionDefinition);
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bool operator()(assembly::FunctionCall const& _functionCall);
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bool operator()(assembly::Block const& _block);
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private:
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/// Verifies that a variable to be assigned to exists and has the same size
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/// as the value, @a _valueSize, unless that is equal to -1.
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bool checkAssignment(assembly::Identifier const& _assignment, size_t _valueSize = size_t(-1));
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bool expectDeposit(int _deposit, int _oldHeight, SourceLocation const& _location);
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Scope& scope(assembly::Block const* _block);
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/// This is used when we enter the body of a function definition. There, the parameters
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/// and return parameters appear as variables which are already on the stack before
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/// we enter the block.
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int m_virtualVariablesInNextBlock = 0;
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int m_stackHeight = 0;
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ExternalIdentifierAccess::Resolver const& m_resolver;
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Scope* m_currentScope = nullptr;
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AsmAnalysisInfo& m_info;
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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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