mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
115 lines
5.1 KiB
C++
115 lines
5.1 KiB
C++
/*
|
|
This file is part of cpp-ethereum.
|
|
|
|
cpp-ethereum is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
cpp-ethereum is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/**
|
|
* @author Christian <c@ethdev.com>
|
|
* @date 2015
|
|
* Type analyzer and checker.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <libsolidity/TypeChecker.h>
|
|
#include <libsolidity/Types.h>
|
|
#include <libsolidity/ASTAnnotations.h>
|
|
#include <libsolidity/ASTForward.h>
|
|
#include <libsolidity/ASTVisitor.h>
|
|
|
|
namespace dev
|
|
{
|
|
namespace solidity
|
|
{
|
|
|
|
|
|
/**
|
|
* The module that performs type analysis on the AST, checks the applicability of operations on
|
|
* those types and stores errors for invalid operations.
|
|
* Provides a way to retrieve the type of an AST node.
|
|
*/
|
|
class TypeChecker: private ASTConstVisitor
|
|
{
|
|
public:
|
|
/// Performs type checking on the given contract and all of its sub-nodes.
|
|
/// @returns true iff all checks passed.
|
|
bool checkTypeRequirements(ContractDefinition const& _contract);
|
|
|
|
/// @returns the list of errors found during type checking.
|
|
std::vector<std::shared_ptr<Error const>> const& errors() const { return m_errors; }
|
|
|
|
/// @returns the type of an expression and asserts that it is present.
|
|
TypePointer const& type(Expression const& _expression) const;
|
|
/// @returns the type of the given variable and throws if the type is not present
|
|
/// (this can happen for variables with non-explicit types before their types are resolved)
|
|
TypePointer const& type(VariableDeclaration const& _variable) const;
|
|
|
|
/// Adds a new error to the list of errors.
|
|
void typeError(ASTNode const& _node, std::string const& _description);
|
|
/// Adds a new error to the list of errors and throws to abort type checking.
|
|
void fatalTypeError(ASTNode const& _node, std::string const& _description);
|
|
|
|
private:
|
|
virtual bool visit(ContractDefinition const& _contract) override;
|
|
/// Checks that two functions defined in this contract with the same name have different
|
|
/// arguments and that there is at most one constructor.
|
|
void checkContractDuplicateFunctions(ContractDefinition const& _contract);
|
|
void checkContractIllegalOverrides(ContractDefinition const& _contract);
|
|
void checkContractAbstractFunctions(ContractDefinition const& _contract);
|
|
void checkContractAbstractConstructors(ContractDefinition const& _contract);
|
|
/// Checks that different functions with external visibility end up having different
|
|
/// external argument types (i.e. different signature).
|
|
void checkContractExternalTypeClashes(ContractDefinition const& _contract);
|
|
/// Checks that all requirements for a library are fulfilled if this is a library.
|
|
void checkLibraryRequirements(ContractDefinition const& _contract);
|
|
|
|
virtual void endVisit(InheritanceSpecifier const& _inheritance) override;
|
|
virtual bool visit(StructDefinition const& _struct) override;
|
|
virtual bool visit(FunctionDefinition const& _function) override;
|
|
virtual bool visit(VariableDeclaration const& _variable) override;
|
|
/// We need to do this manually because we want to pass the bases of the current contract in
|
|
/// case this is a base constructor call.
|
|
void visitManually(ModifierInvocation const& _modifier, std::vector<ContractDefinition const*> const& _bases);
|
|
virtual bool visit(EventDefinition const& _eventDef) override;
|
|
virtual bool visit(IfStatement const& _ifStatement) override;
|
|
virtual bool visit(WhileStatement const& _whileStatement) override;
|
|
virtual bool visit(ForStatement const& _forStatement) override;
|
|
virtual void endVisit(Return const& _return) override;
|
|
virtual void endVisit(ExpressionStatement const& _statement) override;
|
|
virtual bool visit(Assignment const& _assignment) override;
|
|
virtual void endVisit(BinaryOperation const& _operation) override;
|
|
virtual bool visit(UnaryOperation const& _operation) override;
|
|
virtual bool visit(FunctionCall const& _functionCall) override;
|
|
virtual void endVisit(NewExpression const& _newExpression) override;
|
|
virtual bool visit(MemberAccess const& _memberAccess) override;
|
|
virtual bool visit(IndexAccess const& _indexAccess) override;
|
|
virtual bool visit(Identifier const& _identifier) override;
|
|
virtual void endVisit(ElementaryTypeNameExpression const& _expr) override;
|
|
virtual void endVisit(Literal const& _literal) override;
|
|
|
|
/// @returns the referenced declaration and throws on error.
|
|
Declaration const& dereference(Identifier const& _identifier);
|
|
|
|
/// Runs type checks on @a _expression to infer its type and then checks that it is implicitly
|
|
/// convertible to @a _expectedType.
|
|
void expectType(Expression const& _expression, Type const& _expectedType);
|
|
/// Runs type checks on @a _expression to infer its type and then checks that it is an LValue.
|
|
void requireLValue(Expression const& _expression);
|
|
|
|
std::vector<std::shared_ptr<Error const>> m_errors;
|
|
};
|
|
|
|
}
|
|
}
|