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/*
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 2014
* Solidity data types
*/
#pragma once
#include <memory>
#include <string>
#include <boost/noncopyable.hpp>
#include <boost/assert.hpp>
#include <libsolidity/Token.h>
namespace dev
{
namespace solidity
{
// AST forward declarations
class ContractDefinition;
class FunctionDefinition;
class StructDefinition;
class Literal;
class ElementaryTypeName;
class UserDefinedTypeName;
class Mapping;
template <typename T>
using ptr = std::shared_ptr<T>;
// @todo realMxN, string<N>, mapping
class Type : private boost::noncopyable
{
public:
enum class Category
{
INTEGER, BOOL, REAL, STRING, CONTRACT, STRUCT, FUNCTION, MAPPING, VOID, TYPE
};
//! factory functions that convert an AST TypeName to a Type.
static ptr<Type> fromElementaryTypeName(Token::Value _typeToken);
static ptr<Type> fromUserDefinedTypeName(UserDefinedTypeName const& _typeName);
static ptr<Type> fromMapping(Mapping const& _typeName);
static ptr<Type> forLiteral(Literal const& _literal);
virtual Category getCategory() const = 0;
virtual bool isImplicitlyConvertibleTo(const Type&) const { return false; }
virtual bool isExplicitlyConvertibleTo(const Type& _convertTo) const
{
return isImplicitlyConvertibleTo(_convertTo);
}
virtual bool acceptsBinaryOperator(Token::Value) const { return false; }
virtual bool acceptsUnaryOperator(Token::Value) const { return false; }
};
class IntegerType : public Type
{
public:
enum class Modifier
{
UNSIGNED, SIGNED, HASH, ADDRESS
};
virtual Category getCategory() const { return Category::INTEGER; }
static ptr<IntegerType> smallestTypeForLiteral(std::string const& _literal);
explicit IntegerType(int _bits, Modifier _modifier = Modifier::UNSIGNED);
virtual bool isImplicitlyConvertibleTo(Type const& _convertTo) const override;
virtual bool isExplicitlyConvertibleTo(const Type& _convertTo) const override;
virtual bool acceptsBinaryOperator(Token::Value _operator) const override;
virtual bool acceptsUnaryOperator(Token::Value _operator) const override;
int getNumBits() const { return m_bits; }
bool isHash() const { return m_modifier == Modifier::HASH || m_modifier == Modifier::ADDRESS; }
bool isAddress() const { return m_modifier == Modifier::ADDRESS; }
int isSigned() const { return m_modifier == Modifier::SIGNED; }
private:
int m_bits;
Modifier m_modifier;
};
class BoolType : public Type
{
public:
virtual Category getCategory() const { return Category::BOOL; }
virtual bool isImplicitlyConvertibleTo(const Type& _convertTo) const override
{
return _convertTo.getCategory() == Category::BOOL;
}
virtual bool isExplicitlyConvertibleTo(const Type& _convertTo) const override;
virtual bool acceptsBinaryOperator(Token::Value _operator) const override
{
return _operator == Token::AND || _operator == Token::OR;
}
virtual bool acceptsUnaryOperator(Token::Value _operator) const override
{
return _operator == Token::NOT || _operator == Token::DELETE;
}
};
class ContractType : public Type
{
public:
virtual Category getCategory() const { return Category::CONTRACT; }
ContractType(ContractDefinition const& _contract) : m_contract(_contract) {}
virtual bool isImplicitlyConvertibleTo(Type const& _convertTo) const;
private:
ContractDefinition const& m_contract;
};
class StructType : public Type
{
public:
virtual Category getCategory() const { return Category::STRUCT; }
StructType(StructDefinition const& _struct) : m_struct(_struct) {}
virtual bool isImplicitlyConvertibleTo(Type const& _convertTo) const;
virtual bool acceptsUnaryOperator(Token::Value _operator) const override
{
return _operator == Token::DELETE;
}
private:
StructDefinition const& m_struct;
};
class FunctionType : public Type
{
public:
virtual Category getCategory() const { return Category::FUNCTION; }
FunctionType(FunctionDefinition const& _function) : m_function(_function) {}
FunctionDefinition const& getFunction() const { return m_function; }
private:
FunctionDefinition const& m_function;
};
class MappingType : public Type
{
public:
virtual Category getCategory() const { return Category::MAPPING; }
MappingType() {}
private:
//@todo
};
//@todo should be changed into "empty anonymous struct"
class VoidType : public Type
{
public:
virtual Category getCategory() const { return Category::VOID; }
VoidType() {}
};
class TypeType : public Type
{
public:
virtual Category getCategory() const { return Category::TYPE; }
TypeType(ptr<Type> const& _actualType) : m_actualType(_actualType) {}
ptr<Type> const& getActualType() { return m_actualType; }
private:
ptr<Type> m_actualType;
};
}
}
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