mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
6109b5c3a1
Previously it returned 32 bytes for all types, which was wasteful. This commit changes it to return the storage bytes of the underlying type.
1652 lines
66 KiB
C++
1652 lines
66 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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* @author Christian <c@ethdev.com>
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* @date 2014
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* Solidity data types
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*/
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#pragma once
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#include <libsolidity/ast/ASTEnums.h>
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#include <libsolidity/ast/ASTForward.h>
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#include <libsolidity/parsing/Token.h>
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#include <liblangutil/Exceptions.h>
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#include <libsolutil/Common.h>
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#include <libsolutil/Numeric.h>
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#include <libsolutil/CommonIO.h>
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#include <libsolutil/LazyInit.h>
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#include <libsolutil/Result.h>
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#include <boost/rational.hpp>
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#include <map>
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#include <memory>
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#include <optional>
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#include <set>
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#include <string>
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#include <utility>
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namespace solidity::frontend
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{
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class TypeProvider;
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class Type; // forward
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class FunctionType; // forward
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using FunctionTypePointer = FunctionType const*;
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using TypePointers = std::vector<Type const*>;
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using rational = boost::rational<bigint>;
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using TypeResult = util::Result<Type const*>;
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using BoolResult = util::Result<bool>;
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}
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namespace solidity::frontend
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{
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inline rational makeRational(bigint const& _numerator, bigint const& _denominator)
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{
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solAssert(_denominator != 0, "division by zero");
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// due to a bug in certain versions of boost the denominator has to be positive
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if (_denominator < 0)
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return rational(-_numerator, -_denominator);
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else
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return rational(_numerator, _denominator);
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}
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enum class DataLocation { Storage, CallData, Memory };
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/**
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* Helper class to compute storage offsets of members of structs and contracts.
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*/
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class StorageOffsets
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{
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public:
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/// Resets the StorageOffsets objects and determines the position in storage for each
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/// of the elements of @a _types.
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void computeOffsets(TypePointers const& _types);
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/// @returns the offset of the given member, might be null if the member is not part of storage.
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std::pair<u256, unsigned> const* offset(size_t _index) const;
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/// @returns the total number of slots occupied by all members.
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u256 const& storageSize() const { return m_storageSize; }
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private:
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u256 m_storageSize;
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std::map<size_t, std::pair<u256, unsigned>> m_offsets;
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};
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/**
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* List of members of a type.
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*/
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class MemberList
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{
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public:
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struct Member
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{
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/// Manual constructor for members that are not taken from a declaration.
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Member(char const* _name, Type const* _type):
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name(_name),
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type(_type),
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declaration(nullptr)
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{
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}
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/// Constructs a Member with the name extracted from @p _declaration's name.
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Member(Declaration const* _declaration, Type const* _type);
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Member(Declaration const* _declaration, Type const* _type, std::string _name);
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std::string name;
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Type const* type = nullptr;
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Declaration const* declaration = nullptr;
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};
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using MemberMap = std::vector<Member>;
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explicit MemberList(MemberMap _members): m_memberTypes(std::move(_members)) {}
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void combine(MemberList const& _other);
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Type const* memberType(std::string const& _name) const
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{
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Type const* type = nullptr;
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for (auto const& it: m_memberTypes)
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if (it.name == _name)
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{
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solAssert(!type, "Requested member type by non-unique name.");
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type = it.type;
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}
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return type;
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}
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MemberMap membersByName(std::string const& _name) const
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{
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MemberMap members;
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for (auto const& it: m_memberTypes)
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if (it.name == _name)
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members.push_back(it);
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return members;
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}
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/// @returns the offset of the given member in storage slots and bytes inside a slot or
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/// a nullptr if the member is not part of storage.
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std::pair<u256, unsigned> const* memberStorageOffset(std::string const& _name) const;
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/// @returns the number of storage slots occupied by the members.
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u256 const& storageSize() const;
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MemberMap::const_iterator begin() const { return m_memberTypes.begin(); }
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MemberMap::const_iterator end() const { return m_memberTypes.end(); }
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private:
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StorageOffsets const& storageOffsets() const;
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MemberMap m_memberTypes;
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util::LazyInit<StorageOffsets> m_storageOffsets;
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};
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static_assert(std::is_nothrow_move_constructible<MemberList>::value, "MemberList should be noexcept move constructible");
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/**
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* Abstract base class that forms the root of the type hierarchy.
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*/
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class Type
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{
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public:
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Type() = default;
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Type(Type const&) = delete;
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Type(Type&&) = delete;
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Type& operator=(Type const&) = delete;
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Type& operator=(Type&&) = delete;
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virtual ~Type() = default;
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enum class Category
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{
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Address, Integer, RationalNumber, StringLiteral, Bool, FixedPoint, Array, ArraySlice,
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FixedBytes, Contract, Struct, Function, Enum, UserDefinedValueType, Tuple,
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Mapping, TypeType, Modifier, Magic, Module,
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InaccessibleDynamic
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};
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/// @returns a pointer to _a or _b if the other is implicitly convertible to it or nullptr otherwise
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static Type const* commonType(Type const* _a, Type const* _b);
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virtual Category category() const = 0;
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/// @returns a valid solidity identifier such that two types should compare equal if and
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/// only if they have the same identifier.
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/// The identifier should start with "t_".
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/// Can contain characters which are invalid in identifiers.
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virtual std::string richIdentifier() const = 0;
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/// @returns a valid solidity identifier such that two types should compare equal if and
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/// only if they have the same identifier.
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/// The identifier should start with "t_".
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/// Will not contain any character which would be invalid as an identifier.
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std::string identifier() const;
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/// More complex identifier strings use "parentheses", where $_ is interpreted as
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/// "opening parenthesis", _$ as "closing parenthesis", _$_ as "comma" and any $ that
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/// appears as part of a user-supplied identifier is escaped as _$$$_.
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/// @returns an escaped identifier (will not contain any parenthesis or commas)
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static std::string escapeIdentifier(std::string const& _identifier);
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virtual BoolResult isImplicitlyConvertibleTo(Type const& _other) const { return *this == _other; }
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virtual BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const
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{
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return isImplicitlyConvertibleTo(_convertTo);
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}
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/// @returns the resulting type of applying the given unary operator or an empty pointer if
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/// this is not possible.
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/// The default implementation does not allow any unary operator.
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virtual TypeResult unaryOperatorResult(Token) const { return nullptr; }
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/// @returns the resulting type of applying the given binary operator or an empty pointer if
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/// this is not possible.
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/// The default implementation allows comparison operators if a common type exists
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virtual TypeResult binaryOperatorResult(Token _operator, Type const* _other) const
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{
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return TokenTraits::isCompareOp(_operator) ? commonType(this, _other) : nullptr;
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}
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virtual bool operator==(Type const& _other) const { return category() == _other.category(); }
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virtual bool operator!=(Type const& _other) const { return !this->operator ==(_other); }
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/// @returns number of bytes used by this type when encoded for CALL. Cannot be used for
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/// dynamically encoded types.
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/// Always returns a value greater than zero and throws if the type cannot be encoded in calldata
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/// (or is dynamically encoded).
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/// If @a _padded then it is assumed that each element is padded to a multiple of 32 bytes.
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virtual unsigned calldataEncodedSize([[maybe_unused]] bool _padded) const { solAssert(false, ""); }
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/// Convenience version of @see calldataEncodedSize(bool)
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unsigned calldataEncodedSize() const { return calldataEncodedSize(true); }
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/// @returns the distance between two elements of this type in a calldata array, tuple or struct.
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/// For statically encoded types this is the same as calldataEncodedSize(true).
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/// For dynamically encoded types this is the distance between two tail pointers, i.e. 32.
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/// Always returns a value greater than zero and throws if the type cannot be encoded in calldata.
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unsigned calldataHeadSize() const { return isDynamicallyEncoded() ? 32 : calldataEncodedSize(true); }
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/// @returns the (minimal) size of the calldata tail for this type. Can only be used for
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/// dynamically encoded types. For dynamically-sized arrays this is 32 (the size of the length),
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/// for statically-sized, but dynamically encoded arrays this is 32*length(), for structs
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/// this is the sum of the calldataHeadSize's of its members.
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/// Always returns a value greater than zero and throws if the type cannot be encoded in calldata
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/// (or is not dynamically encoded).
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virtual unsigned calldataEncodedTailSize() const { solAssert(false, ""); }
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/// @returns the size of this data type in bytes when stored in memory. For memory-reference
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/// types, this is the size of the memory pointer.
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virtual unsigned memoryHeadSize() const { return calldataEncodedSize(); }
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/// @returns the size of this data type in bytes when stored in memory. For memory-reference
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/// types, this is the size of the actual data area, if it is statically-sized.
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virtual u256 memoryDataSize() const { return calldataEncodedSize(); }
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/// @returns true if the type is a dynamic array
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virtual bool isDynamicallySized() const { return false; }
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/// @returns true if the type is dynamically encoded in the ABI
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virtual bool isDynamicallyEncoded() const { return false; }
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/// @returns the number of storage slots required to hold this value in storage.
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/// For dynamically "allocated" types, it returns the size of the statically allocated head,
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virtual u256 storageSize() const { return 1; }
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/// @returns an upper bound on the total storage size required by this type, descending
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/// into structs and statically-sized arrays. This is mainly to ensure that the storage
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/// slot allocation algorithm does not overflow, it is not a protection against collisions.
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virtual bigint storageSizeUpperBound() const { return 1; }
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/// Multiple small types can be packed into a single storage slot. If such a packing is possible
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/// this function @returns the size in bytes smaller than 32. Data is moved to the next slot if
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/// it does not fit.
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/// In order to avoid computation at runtime of whether such moving is necessary, structs and
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/// array data (not each element) always start a new slot.
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virtual unsigned storageBytes() const { return 32; }
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/// Returns true if the type is a value type that is left-aligned on the stack with a size of
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/// storageBytes() bytes. Returns false if the type is a value type that is right-aligned on
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/// the stack with a size of storageBytes() bytes. Asserts if it is not a value type or the
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/// encoding is more complicated.
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/// Signed integers are not considered "more complicated" even though they need to be
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/// sign-extended.
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virtual bool leftAligned() const { solAssert(false, "Alignment property of non-value type requested."); }
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/// Returns true if the type can be stored in storage.
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virtual bool canBeStored() const { return true; }
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/// Returns false if the type cannot live outside the storage, i.e. if it includes some mapping.
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virtual bool containsNestedMapping() const
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{
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solAssert(nameable(), "Called for a non nameable type.");
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return false;
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}
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/// Returns true if the type can be stored as a value (as opposed to a reference) on the stack,
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/// i.e. it behaves differently in lvalue context and in value context.
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virtual bool isValueType() const { return false; }
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/// @returns true if this type can be used for variables. It returns false for
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/// types like magic types, literals and function types with a kind that is not
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/// internal or external.
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virtual bool nameable() const { return false; }
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/// @returns a list of named and typed stack items that determine the layout of this type on the stack.
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/// A stack item either has an empty name and type ``nullptr`` referring to a single stack slot, or
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/// has a non-empty name and a valid type referring to the stack layout of that type.
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/// The complete layout of a type on the stack can be obtained from its stack items recursively as follows:
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/// - Each unnamed stack item is untyped (its type is ``nullptr``) and contributes exactly one stack slot.
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/// - Each named stack item is typed and contributes the stack slots given by the stack items of its type.
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std::vector<std::tuple<std::string, Type const*>> const& stackItems() const
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{
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if (!m_stackItems)
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m_stackItems = makeStackItems();
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return *m_stackItems;
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}
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/// Total number of stack slots occupied by this type. This is the sum of ``sizeOnStack`` of all ``stackItems()``.
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// TODO: consider changing the return type to be size_t
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unsigned sizeOnStack() const
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{
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if (!m_stackSize)
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{
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size_t sizeOnStack = 0;
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for (auto const& slot: stackItems())
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if (std::get<1>(slot))
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sizeOnStack += std::get<1>(slot)->sizeOnStack();
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else
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++sizeOnStack;
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m_stackSize = sizeOnStack;
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}
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return static_cast<unsigned>(*m_stackSize);
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}
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/// If it is possible to initialize such a value in memory by just writing zeros
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/// of the size memoryHeadSize().
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virtual bool hasSimpleZeroValueInMemory() const { return true; }
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/// @returns the mobile (in contrast to static) type corresponding to the given type.
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/// This returns the corresponding IntegerType or FixedPointType for RationalNumberType
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/// and the pointer type for storage reference types.
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/// Might return a null pointer if there is no fitting type.
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virtual Type const* mobileType() const { return this; }
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/// @returns true if this is a non-value type and the data of this type is stored at the
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/// given location.
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virtual bool dataStoredIn(DataLocation) const { return false; }
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/// Returns the list of all members of this type. Default implementation: no members apart from bound.
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/// @param _currentScope scope in which the members are accessed.
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MemberList const& members(ASTNode const* _currentScope) const;
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/// Convenience method, returns the type of the given named member or an empty pointer if no such member exists.
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Type const* memberType(std::string const& _name, ASTNode const* _currentScope = nullptr) const
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{
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return members(_currentScope).memberType(_name);
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}
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virtual std::string toString(bool _short) const = 0;
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std::string toString() const { return toString(false); }
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/// @returns the canonical name of this type for use in library function signatures.
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virtual std::string canonicalName() const { return toString(true); }
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/// @returns the signature of this type in external functions, i.e. `uint256` for integers
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/// or `(uint256,bytes8)[2]` for an array of structs. If @a _structsByName,
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/// structs are given by canonical name like `ContractName.StructName[2]`.
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virtual std::string signatureInExternalFunction(bool /*_structsByName*/) const
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{
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return canonicalName();
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}
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virtual u256 literalValue(Literal const*) const
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{
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solAssert(false, "Literal value requested for type without literals: " + toString(false));
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}
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/// @returns a (simpler) type that is encoded in the same way for external function calls.
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/// This for example returns address for contract types.
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/// If there is no such type, returns an empty shared pointer.
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virtual Type const* encodingType() const { return nullptr; }
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/// @returns the encoding type used under the given circumstances for the type of an expression
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/// when used for e.g. abi.encode(...) or the empty pointer if the object
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/// cannot be encoded.
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/// This is different from encodingType since it takes implicit conversions into account.
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Type const* fullEncodingType(bool _inLibraryCall, bool _encoderV2, bool _packed) const;
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/// @returns a (simpler) type that is used when decoding this type in calldata.
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virtual Type const* decodingType() const { return encodingType(); }
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/// @returns a type that will be used outside of Solidity for e.g. function signatures.
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/// This for example returns address for contract types.
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/// If there is no such type, returns an empty shared pointer.
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/// @param _inLibrary if set, returns types as used in a library, e.g. struct and contract types
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/// are returned without modification.
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virtual TypeResult interfaceType(bool /*_inLibrary*/) const { return nullptr; }
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/// Clears all internally cached values (if any).
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virtual void clearCache() const;
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private:
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/// @returns a member list containing all members added to this type by `using for` directives.
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static MemberList::MemberMap boundFunctions(Type const& _type, ASTNode const& _scope);
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protected:
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/// @returns the members native to this type depending on the given context. This function
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/// is used (in conjunction with boundFunctions to fill m_members below.
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virtual MemberList::MemberMap nativeMembers(ASTNode const* /*_currentScope*/) const
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{
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return MemberList::MemberMap();
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}
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/// Generates the stack items to be returned by ``stackItems()``. Defaults
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/// to exactly one unnamed and untyped stack item referring to a single stack slot.
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virtual std::vector<std::tuple<std::string, Type const*>> makeStackItems() const
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{
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return {std::make_tuple(std::string(), nullptr)};
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}
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/// List of member types (parameterised by scape), will be lazy-initialized.
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mutable std::map<ASTNode const*, std::unique_ptr<MemberList>> m_members;
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mutable std::optional<std::vector<std::tuple<std::string, Type const*>>> m_stackItems;
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mutable std::optional<size_t> m_stackSize;
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};
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/**
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* Type for addresses.
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*/
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class AddressType: public Type
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{
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public:
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explicit AddressType(StateMutability _stateMutability);
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Category category() const override { return Category::Address; }
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std::string richIdentifier() const override;
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BoolResult isImplicitlyConvertibleTo(Type const& _other) const override;
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BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
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TypeResult unaryOperatorResult(Token _operator) const override;
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TypeResult binaryOperatorResult(Token _operator, Type const* _other) const override;
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bool operator==(Type const& _other) const override;
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unsigned calldataEncodedSize(bool _padded = true) const override { return _padded ? 32 : 160 / 8; }
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unsigned storageBytes() const override { return 160 / 8; }
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bool leftAligned() const override { return false; }
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bool isValueType() const override { return true; }
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bool nameable() const override { return true; }
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MemberList::MemberMap nativeMembers(ASTNode const*) const override;
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std::string toString(bool _short) const override;
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std::string canonicalName() const override;
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u256 literalValue(Literal const* _literal) const override;
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Type const* encodingType() const override { return this; }
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TypeResult interfaceType(bool) const override { return this; }
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StateMutability stateMutability(void) const { return m_stateMutability; }
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private:
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StateMutability m_stateMutability;
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};
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/**
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* Any kind of integer type (signed, unsigned).
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*/
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class IntegerType: public Type
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{
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public:
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enum class Modifier
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{
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Unsigned, Signed
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};
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explicit IntegerType(unsigned _bits, Modifier _modifier = Modifier::Unsigned);
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Category category() const override { return Category::Integer; }
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std::string richIdentifier() const override;
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
TypeResult binaryOperatorResult(Token _operator, Type const* _other) const override;
|
|
|
|
bool operator==(Type const& _other) const override;
|
|
|
|
unsigned calldataEncodedSize(bool _padded = true) const override { return _padded ? 32 : m_bits / 8; }
|
|
unsigned storageBytes() const override { return m_bits / 8; }
|
|
bool leftAligned() const override { return false; }
|
|
bool isValueType() const override { return true; }
|
|
bool nameable() const override { return true; }
|
|
|
|
std::string toString(bool _short) const override;
|
|
|
|
Type const* encodingType() const override { return this; }
|
|
TypeResult interfaceType(bool) const override { return this; }
|
|
|
|
unsigned numBits() const { return m_bits; }
|
|
bool isSigned() const { return m_modifier == Modifier::Signed; }
|
|
|
|
u256 min() const;
|
|
u256 max() const;
|
|
|
|
bigint minValue() const;
|
|
bigint maxValue() const;
|
|
|
|
private:
|
|
unsigned const m_bits;
|
|
Modifier const m_modifier;
|
|
};
|
|
|
|
/**
|
|
* A fixed point type number (signed, unsigned).
|
|
*/
|
|
class FixedPointType: public Type
|
|
{
|
|
public:
|
|
enum class Modifier
|
|
{
|
|
Unsigned, Signed
|
|
};
|
|
|
|
explicit FixedPointType(unsigned _totalBits, unsigned _fractionalDigits, Modifier _modifier = Modifier::Unsigned);
|
|
Category category() const override { return Category::FixedPoint; }
|
|
|
|
std::string richIdentifier() const override;
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
TypeResult binaryOperatorResult(Token _operator, Type const* _other) const override;
|
|
|
|
bool operator==(Type const& _other) const override;
|
|
|
|
unsigned calldataEncodedSize(bool _padded = true) const override { return _padded ? 32 : m_totalBits / 8; }
|
|
unsigned storageBytes() const override { return m_totalBits / 8; }
|
|
bool leftAligned() const override { return false; }
|
|
bool isValueType() const override { return true; }
|
|
bool nameable() const override { return true; }
|
|
|
|
std::string toString(bool _short) const override;
|
|
|
|
Type const* encodingType() const override { return this; }
|
|
TypeResult interfaceType(bool) const override { return this; }
|
|
|
|
/// Number of bits used for this type in total.
|
|
unsigned numBits() const { return m_totalBits; }
|
|
/// Number of decimal digits after the radix point.
|
|
unsigned fractionalDigits() const { return m_fractionalDigits; }
|
|
bool isSigned() const { return m_modifier == Modifier::Signed; }
|
|
/// @returns the largest integer value this type con hold. Note that this is not the
|
|
/// largest value in general.
|
|
bigint maxIntegerValue() const;
|
|
/// @returns the smallest integer value this type can hold. Note hat this is not the
|
|
/// smallest value in general.
|
|
bigint minIntegerValue() const;
|
|
|
|
/// @returns the smallest integer type that can hold this type with fractional parts shifted to integers.
|
|
IntegerType const* asIntegerType() const;
|
|
|
|
private:
|
|
unsigned m_totalBits;
|
|
unsigned m_fractionalDigits;
|
|
Modifier m_modifier;
|
|
};
|
|
|
|
/**
|
|
* Integer and fixed point constants either literals or computed.
|
|
* Example expressions: 2, 3.14, 2+10.2, ~10.
|
|
* There is one distinct type per value.
|
|
*/
|
|
class RationalNumberType: public Type
|
|
{
|
|
public:
|
|
explicit RationalNumberType(rational _value, Type const* _compatibleBytesType = nullptr):
|
|
m_value(std::move(_value)), m_compatibleBytesType(_compatibleBytesType)
|
|
{}
|
|
|
|
Category category() const override { return Category::RationalNumber; }
|
|
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
TypeResult binaryOperatorResult(Token _operator, Type const* _other) const override;
|
|
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
|
|
bool canBeStored() const override { return false; }
|
|
|
|
std::string toString(bool _short) const override;
|
|
u256 literalValue(Literal const* _literal) const override;
|
|
Type const* mobileType() const override;
|
|
|
|
/// @returns the underlying raw literal value.
|
|
///
|
|
/// @see literalValue(Literal const*))
|
|
rational const& value() const noexcept { return m_value; }
|
|
|
|
/// @returns the smallest integer type that can hold the value or an empty pointer if not possible.
|
|
IntegerType const* integerType() const;
|
|
/// @returns the smallest fixed type that can hold the value or incurs the least precision loss,
|
|
/// unless the value was truncated, then a suitable type will be chosen to indicate such event.
|
|
/// If the integer part does not fit, returns an empty pointer.
|
|
FixedPointType const* fixedPointType() const;
|
|
|
|
/// @returns true if the value is not an integer.
|
|
bool isFractional() const { return m_value.denominator() != 1; }
|
|
|
|
/// @returns true if the value is negative.
|
|
bool isNegative() const { return m_value < 0; }
|
|
|
|
/// @returns true if the value is zero.
|
|
bool isZero() const { return m_value == 0; }
|
|
|
|
/// @returns true if the literal is a valid integer.
|
|
static std::tuple<bool, rational> isValidLiteral(Literal const& _literal);
|
|
|
|
private:
|
|
rational m_value;
|
|
|
|
/// Bytes type to which the rational can be implicitly converted.
|
|
/// Empty for all rationals that are not directly parsed from hex literals.
|
|
Type const* m_compatibleBytesType;
|
|
|
|
/// @returns true if the literal is a valid rational number.
|
|
static std::tuple<bool, rational> parseRational(std::string const& _value);
|
|
|
|
/// @returns a truncated readable representation of the bigint keeping only
|
|
/// up to 4 leading and 4 trailing digits.
|
|
static std::string bigintToReadableString(bigint const& num);
|
|
};
|
|
|
|
/**
|
|
* Literal string, can be converted to bytes, bytesX or string.
|
|
*/
|
|
class StringLiteralType: public Type
|
|
{
|
|
public:
|
|
explicit StringLiteralType(Literal const& _literal);
|
|
explicit StringLiteralType(std::string _value);
|
|
|
|
Category category() const override { return Category::StringLiteral; }
|
|
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
|
|
bool canBeStored() const override { return false; }
|
|
|
|
std::string toString(bool) const override;
|
|
Type const* mobileType() const override;
|
|
|
|
std::string const& value() const { return m_value; }
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override { return {}; }
|
|
private:
|
|
std::string m_value;
|
|
};
|
|
|
|
/**
|
|
* Bytes type with fixed length of up to 32 bytes.
|
|
*/
|
|
class FixedBytesType: public Type
|
|
{
|
|
public:
|
|
explicit FixedBytesType(unsigned _bytes);
|
|
|
|
Category category() const override { return Category::FixedBytes; }
|
|
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
TypeResult binaryOperatorResult(Token _operator, Type const* _other) const override;
|
|
|
|
unsigned calldataEncodedSize(bool _padded) const override { return _padded && m_bytes > 0 ? 32 : m_bytes; }
|
|
unsigned storageBytes() const override { return m_bytes; }
|
|
bool leftAligned() const override { return true; }
|
|
bool isValueType() const override { return true; }
|
|
bool nameable() const override { return true; }
|
|
|
|
std::string toString(bool) const override { return "bytes" + util::toString(m_bytes); }
|
|
MemberList::MemberMap nativeMembers(ASTNode const*) const override;
|
|
Type const* encodingType() const override { return this; }
|
|
TypeResult interfaceType(bool) const override { return this; }
|
|
|
|
unsigned numBytes() const { return m_bytes; }
|
|
|
|
private:
|
|
unsigned m_bytes;
|
|
};
|
|
|
|
/**
|
|
* The boolean type.
|
|
*/
|
|
class BoolType: public Type
|
|
{
|
|
public:
|
|
Category category() const override { return Category::Bool; }
|
|
std::string richIdentifier() const override { return "t_bool"; }
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
TypeResult binaryOperatorResult(Token _operator, Type const* _other) const override;
|
|
|
|
unsigned calldataEncodedSize(bool _padded) const override{ return _padded ? 32 : 1; }
|
|
unsigned storageBytes() const override { return 1; }
|
|
bool leftAligned() const override { return false; }
|
|
bool isValueType() const override { return true; }
|
|
bool nameable() const override { return true; }
|
|
|
|
std::string toString(bool) const override { return "bool"; }
|
|
u256 literalValue(Literal const* _literal) const override;
|
|
Type const* encodingType() const override { return this; }
|
|
TypeResult interfaceType(bool) const override { return this; }
|
|
};
|
|
|
|
/**
|
|
* Base class for types which can be thought of as several elements of other types put together.
|
|
* For example a struct is composed of its members, an array is composed of multiple copies of its
|
|
* base element and a mapping is composed of its value type elements (note that keys are not
|
|
* stored anywhere).
|
|
*/
|
|
class CompositeType: public Type
|
|
{
|
|
protected:
|
|
CompositeType() = default;
|
|
|
|
public:
|
|
/// @returns a list containing the type itself, elements of its decomposition,
|
|
/// elements of decomposition of these elements and so on, up to non-composite types.
|
|
/// Each type is included only once.
|
|
std::vector<Type const*> fullDecomposition() const;
|
|
|
|
protected:
|
|
/// @returns a list of types that together make up the data part of this type.
|
|
/// Contains all types that will have to be implicitly stored, whenever an object of this type is stored.
|
|
/// In particular, it returns the base type for arrays and array slices, the member types for structs,
|
|
/// the component types for tuples and the value type for mappings
|
|
/// (note that the key type of a mapping is *not* part of the list).
|
|
virtual std::vector<Type const*> decomposition() const = 0;
|
|
};
|
|
|
|
/**
|
|
* Base class used by types which are not value types and can be stored either in storage, memory
|
|
* or calldata. This is currently used by arrays and structs.
|
|
*/
|
|
class ReferenceType: public CompositeType
|
|
{
|
|
protected:
|
|
explicit ReferenceType(DataLocation _location): m_location(_location) {}
|
|
|
|
public:
|
|
DataLocation location() const { return m_location; }
|
|
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override
|
|
{
|
|
return nullptr;
|
|
}
|
|
unsigned memoryHeadSize() const override { return 32; }
|
|
u256 memoryDataSize() const override = 0;
|
|
|
|
unsigned calldataEncodedSize(bool) const override = 0;
|
|
unsigned calldataEncodedTailSize() const override = 0;
|
|
|
|
/// @returns a copy of this type with location (recursively) changed to @a _location,
|
|
/// whereas isPointer is only shallowly changed - the deep copy is always a bound reference.
|
|
virtual std::unique_ptr<ReferenceType> copyForLocation(DataLocation _location, bool _isPointer) const = 0;
|
|
|
|
Type const* mobileType() const override { return withLocation(m_location, true); }
|
|
bool dataStoredIn(DataLocation _location) const override { return m_location == _location; }
|
|
bool hasSimpleZeroValueInMemory() const override { return false; }
|
|
|
|
/// Storage references can be pointers or bound references. In general, local variables are of
|
|
/// pointer type, state variables are bound references. Assignments to pointers or deleting
|
|
/// them will not modify storage (that will only change the pointer). Assignment from
|
|
/// non-storage objects to a variable of storage pointer type is not possible.
|
|
/// For anything other than storage, this always returns true because assignments
|
|
/// never change the contents of the original value.
|
|
bool isPointer() const;
|
|
|
|
/// @returns true if this is valid to be stored in data location _loc
|
|
/// The function mostly checks sizes. For calldata, this should only be called
|
|
/// if the type has an interfaceType.
|
|
virtual BoolResult validForLocation(DataLocation _loc) const = 0;
|
|
|
|
bool operator==(ReferenceType const& _other) const
|
|
{
|
|
return location() == _other.location() && isPointer() == _other.isPointer();
|
|
}
|
|
|
|
Type const* withLocation(DataLocation _location, bool _isPointer) const;
|
|
|
|
protected:
|
|
Type const* copyForLocationIfReference(Type const* _type) const;
|
|
/// @returns a human-readable description of the reference part of the type.
|
|
std::string stringForReferencePart() const;
|
|
/// @returns the suffix computed from the reference part to be used by identifier();
|
|
std::string identifierLocationSuffix() const;
|
|
|
|
DataLocation m_location = DataLocation::Storage;
|
|
bool m_isPointer = true;
|
|
};
|
|
|
|
/**
|
|
* The type of an array. The flavours are byte array (bytes), statically- (<type>[<length>])
|
|
* and dynamically-sized array (<type>[]).
|
|
* In storage, all arrays are packed tightly (as long as more than one elementary type fits in
|
|
* one slot). Dynamically sized arrays (including byte arrays) start with their size as a uint and
|
|
* thus start on their own slot.
|
|
*/
|
|
class ArrayType: public ReferenceType
|
|
{
|
|
public:
|
|
/// Constructor for a byte array ("bytes") and string.
|
|
explicit ArrayType(DataLocation _location, bool _isString = false);
|
|
|
|
/// Constructor for a dynamically sized array type ("type[]")
|
|
ArrayType(DataLocation _location, Type const* _baseType):
|
|
ReferenceType(_location),
|
|
m_baseType(copyForLocationIfReference(_baseType))
|
|
{
|
|
}
|
|
|
|
/// Constructor for a fixed-size array type ("type[20]")
|
|
ArrayType(DataLocation _location, Type const* _baseType, u256 _length):
|
|
ReferenceType(_location),
|
|
m_baseType(copyForLocationIfReference(_baseType)),
|
|
m_hasDynamicLength(false),
|
|
m_length(std::move(_length))
|
|
{}
|
|
|
|
Category category() const override { return Category::Array; }
|
|
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
unsigned calldataEncodedSize(bool) const override;
|
|
unsigned calldataEncodedTailSize() const override;
|
|
bool isDynamicallySized() const override { return m_hasDynamicLength; }
|
|
bool isDynamicallyEncoded() const override;
|
|
bigint storageSizeUpperBound() const override;
|
|
u256 storageSize() const override;
|
|
bool containsNestedMapping() const override { return m_baseType->containsNestedMapping(); }
|
|
bool nameable() const override { return true; }
|
|
|
|
std::string toString(bool _short) const override;
|
|
std::string canonicalName() const override;
|
|
std::string signatureInExternalFunction(bool _structsByName) const override;
|
|
MemberList::MemberMap nativeMembers(ASTNode const* _currentScope) const override;
|
|
Type const* encodingType() const override;
|
|
Type const* decodingType() const override;
|
|
TypeResult interfaceType(bool _inLibrary) const override;
|
|
|
|
BoolResult validForLocation(DataLocation _loc) const override;
|
|
|
|
/// @returns true if this is a byte array or a string
|
|
bool isByteArray() const { return m_arrayKind != ArrayKind::Ordinary; }
|
|
/// @returns true if this is a string
|
|
bool isString() const { return m_arrayKind == ArrayKind::String; }
|
|
Type const* baseType() const { solAssert(!!m_baseType, ""); return m_baseType; }
|
|
Type const* finalBaseType(bool breakIfDynamicArrayType) const;
|
|
u256 const& length() const { return m_length; }
|
|
u256 memoryDataSize() const override;
|
|
|
|
std::unique_ptr<ReferenceType> copyForLocation(DataLocation _location, bool _isPointer) const override;
|
|
|
|
/// The offset to advance in calldata to move from one array element to the next.
|
|
unsigned calldataStride() const { return isByteArray() ? 1 : m_baseType->calldataHeadSize(); }
|
|
/// The offset to advance in memory to move from one array element to the next.
|
|
unsigned memoryStride() const { return isByteArray() ? 1 : m_baseType->memoryHeadSize(); }
|
|
/// The offset to advance in storage to move from one array element to the next.
|
|
unsigned storageStride() const { return isByteArray() ? 1 : m_baseType->storageBytes(); }
|
|
|
|
void clearCache() const override;
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
std::vector<Type const*> decomposition() const override { return {m_baseType}; }
|
|
|
|
private:
|
|
/// String is interpreted as a subtype of Bytes.
|
|
enum class ArrayKind { Ordinary, Bytes, String };
|
|
|
|
bigint unlimitedStaticCalldataSize(bool _padded) const;
|
|
|
|
///< Byte arrays ("bytes") and strings have different semantics from ordinary arrays.
|
|
ArrayKind m_arrayKind = ArrayKind::Ordinary;
|
|
Type const* m_baseType;
|
|
bool m_hasDynamicLength = true;
|
|
u256 m_length;
|
|
mutable std::optional<TypeResult> m_interfaceType;
|
|
mutable std::optional<TypeResult> m_interfaceType_library;
|
|
};
|
|
|
|
class ArraySliceType: public ReferenceType
|
|
{
|
|
public:
|
|
explicit ArraySliceType(ArrayType const& _arrayType): ReferenceType(_arrayType.location()), m_arrayType(_arrayType) {}
|
|
Category category() const override { return Category::ArraySlice; }
|
|
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _other) const override;
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
unsigned calldataEncodedSize(bool) const override { solAssert(false, ""); }
|
|
unsigned calldataEncodedTailSize() const override { return 32; }
|
|
bool isDynamicallySized() const override { return true; }
|
|
bool isDynamicallyEncoded() const override { return true; }
|
|
std::string toString(bool _short) const override;
|
|
Type const* mobileType() const override;
|
|
|
|
BoolResult validForLocation(DataLocation _loc) const override { return m_arrayType.validForLocation(_loc); }
|
|
|
|
ArrayType const& arrayType() const { return m_arrayType; }
|
|
u256 memoryDataSize() const override { solAssert(false, ""); }
|
|
|
|
std::unique_ptr<ReferenceType> copyForLocation(DataLocation, bool) const override { solAssert(false, ""); }
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
std::vector<Type const*> decomposition() const override { return {m_arrayType.baseType()}; }
|
|
|
|
private:
|
|
ArrayType const& m_arrayType;
|
|
};
|
|
|
|
/**
|
|
* The type of a contract instance or library, there is one distinct type for each contract definition.
|
|
*/
|
|
class ContractType: public Type
|
|
{
|
|
public:
|
|
explicit ContractType(ContractDefinition const& _contract, bool _super = false):
|
|
m_contract(_contract), m_super(_super) {}
|
|
|
|
Category category() const override { return Category::Contract; }
|
|
/// Contracts can be implicitly converted only to base contracts.
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
/// Contracts can only be explicitly converted to address types and base contracts.
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
unsigned calldataEncodedSize(bool _padded ) const override
|
|
{
|
|
solAssert(!isSuper(), "");
|
|
return encodingType()->calldataEncodedSize(_padded);
|
|
}
|
|
unsigned storageBytes() const override { solAssert(!isSuper(), ""); return 20; }
|
|
bool leftAligned() const override { solAssert(!isSuper(), ""); return false; }
|
|
bool isValueType() const override { return !isSuper(); }
|
|
bool nameable() const override { return !isSuper(); }
|
|
std::string toString(bool _short) const override;
|
|
std::string canonicalName() const override;
|
|
|
|
MemberList::MemberMap nativeMembers(ASTNode const* _currentScope) const override;
|
|
|
|
Type const* encodingType() const override;
|
|
|
|
TypeResult interfaceType(bool _inLibrary) const override
|
|
{
|
|
if (isSuper())
|
|
return nullptr;
|
|
return _inLibrary ? this : encodingType();
|
|
}
|
|
|
|
/// See documentation of m_super
|
|
bool isSuper() const { return m_super; }
|
|
|
|
// @returns true if and only if the contract has a receive ether function or a payable fallback function, i.e.
|
|
// if it has code that will be executed on plain ether transfers
|
|
bool isPayable() const;
|
|
|
|
ContractDefinition const& contractDefinition() const { return m_contract; }
|
|
|
|
/// Returns the function type of the constructor modified to return an object of the contract's type.
|
|
FunctionType const* newExpressionType() const;
|
|
|
|
/// @returns a list of all state variables (including inherited) of the contract and their
|
|
/// offsets in storage.
|
|
std::vector<std::tuple<VariableDeclaration const*, u256, unsigned>> stateVariables() const;
|
|
/// @returns a list of all immutable variables (including inherited) of the contract.
|
|
std::vector<VariableDeclaration const*> immutableVariables() const;
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
private:
|
|
ContractDefinition const& m_contract;
|
|
/// If true, this is a special "super" type of m_contract containing only members that m_contract inherited
|
|
bool m_super = false;
|
|
/// Type of the constructor, @see constructorType. Lazily initialized.
|
|
mutable FunctionType const* m_constructorType = nullptr;
|
|
};
|
|
|
|
/**
|
|
* The type of a struct instance, there is one distinct type per struct definition.
|
|
*/
|
|
class StructType: public ReferenceType
|
|
{
|
|
public:
|
|
explicit StructType(StructDefinition const& _struct, DataLocation _location = DataLocation::Storage):
|
|
ReferenceType(_location), m_struct(_struct) {}
|
|
|
|
Category category() const override { return Category::Struct; }
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
unsigned calldataEncodedSize(bool) const override;
|
|
unsigned calldataEncodedTailSize() const override;
|
|
bool isDynamicallyEncoded() const override;
|
|
u256 memoryDataSize() const override;
|
|
bigint storageSizeUpperBound() const override;
|
|
u256 storageSize() const override;
|
|
bool containsNestedMapping() const override;
|
|
bool nameable() const override { return true; }
|
|
std::string toString(bool _short) const override;
|
|
|
|
MemberList::MemberMap nativeMembers(ASTNode const* _currentScope) const override;
|
|
|
|
Type const* encodingType() const override;
|
|
TypeResult interfaceType(bool _inLibrary) const override;
|
|
|
|
BoolResult validForLocation(DataLocation _loc) const override;
|
|
|
|
bool recursive() const;
|
|
|
|
std::unique_ptr<ReferenceType> copyForLocation(DataLocation _location, bool _isPointer) const override;
|
|
|
|
std::string canonicalName() const override;
|
|
std::string signatureInExternalFunction(bool _structsByName) const override;
|
|
|
|
/// @returns a function that performs the type conversion between a list of struct members
|
|
/// and a memory struct of this type.
|
|
FunctionType const* constructorType() const;
|
|
|
|
std::pair<u256, unsigned> const& storageOffsetsOfMember(std::string const& _name) const;
|
|
u256 memoryOffsetOfMember(std::string const& _name) const;
|
|
unsigned calldataOffsetOfMember(std::string const& _name) const;
|
|
|
|
StructDefinition const& structDefinition() const { return m_struct; }
|
|
|
|
/// @returns the vector of types of members available in memory.
|
|
TypePointers memoryMemberTypes() const;
|
|
|
|
void clearCache() const override;
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
std::vector<Type const*> decomposition() const override;
|
|
|
|
private:
|
|
StructDefinition const& m_struct;
|
|
// Caches for interfaceType(bool)
|
|
mutable std::optional<TypeResult> m_interfaceType;
|
|
mutable std::optional<TypeResult> m_interfaceType_library;
|
|
};
|
|
|
|
/**
|
|
* The type of an enum instance, there is one distinct type per enum definition.
|
|
*/
|
|
class EnumType: public Type
|
|
{
|
|
public:
|
|
explicit EnumType(EnumDefinition const& _enum): m_enum(_enum) {}
|
|
|
|
Category category() const override { return Category::Enum; }
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
unsigned calldataEncodedSize(bool _padded) const override
|
|
{
|
|
return encodingType()->calldataEncodedSize(_padded);
|
|
}
|
|
unsigned storageBytes() const override;
|
|
bool leftAligned() const override { return false; }
|
|
std::string toString(bool _short) const override;
|
|
std::string canonicalName() const override;
|
|
bool isValueType() const override { return true; }
|
|
bool nameable() const override { return true; }
|
|
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
Type const* encodingType() const override;
|
|
TypeResult interfaceType(bool _inLibrary) const override
|
|
{
|
|
return _inLibrary ? this : encodingType();
|
|
}
|
|
|
|
EnumDefinition const& enumDefinition() const { return m_enum; }
|
|
/// @returns the value that the string has in the Enum
|
|
unsigned int memberValue(ASTString const& _member) const;
|
|
size_t numberOfMembers() const;
|
|
unsigned int minValue() const { return 0; }
|
|
unsigned int maxValue() const
|
|
{
|
|
solAssert(numberOfMembers() <= 256, "");
|
|
return static_cast<unsigned int>(numberOfMembers()) - 1;
|
|
}
|
|
|
|
private:
|
|
EnumDefinition const& m_enum;
|
|
};
|
|
|
|
/**
|
|
* The type of a UserDefinedValueType.
|
|
*/
|
|
class UserDefinedValueType: public Type
|
|
{
|
|
public:
|
|
explicit UserDefinedValueType(UserDefinedValueTypeDefinition const& _definition):
|
|
m_definition(_definition)
|
|
{}
|
|
|
|
Category category() const override { return Category::UserDefinedValueType; }
|
|
Type const& underlyingType() const;
|
|
UserDefinedValueTypeDefinition const& definition() const { return m_definition; }
|
|
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override { return nullptr; }
|
|
Type const* encodingType() const override { return &underlyingType(); }
|
|
TypeResult interfaceType(bool /* _inLibrary */) const override {return &underlyingType(); }
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
|
|
unsigned calldataEncodedSize(bool _padded) const override { return underlyingType().calldataEncodedSize(_padded); }
|
|
|
|
bool leftAligned() const override { return underlyingType().leftAligned(); }
|
|
bool canBeStored() const override { return underlyingType().canBeStored(); }
|
|
u256 storageSize() const override { return underlyingType().storageSize(); }
|
|
unsigned storageBytes() const override { return underlyingType().storageBytes(); }
|
|
|
|
bool isValueType() const override
|
|
{
|
|
solAssert(underlyingType().isValueType(), "");
|
|
return true;
|
|
}
|
|
bool nameable() const override
|
|
{
|
|
solAssert(underlyingType().nameable(), "");
|
|
return true;
|
|
}
|
|
|
|
bool containsNestedMapping() const override
|
|
{
|
|
solAssert(nameable(), "Called for a non nameable type.");
|
|
solAssert(!underlyingType().containsNestedMapping(), "");
|
|
return false;
|
|
}
|
|
|
|
bool hasSimpleZeroValueInMemory() const override
|
|
{
|
|
solAssert(underlyingType().hasSimpleZeroValueInMemory(), "");
|
|
return true;
|
|
}
|
|
|
|
bool dataStoredIn(DataLocation _loc) const override
|
|
{
|
|
solAssert(!underlyingType().dataStoredIn(_loc), "");
|
|
return false;
|
|
}
|
|
|
|
std::string toString(bool _short) const override;
|
|
std::string canonicalName() const override { solAssert(false, ""); }
|
|
std::string signatureInExternalFunction(bool) const override { solAssert(false, ""); }
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
|
|
private:
|
|
UserDefinedValueTypeDefinition const& m_definition;
|
|
};
|
|
|
|
/**
|
|
* Type that can hold a finite sequence of values of different types.
|
|
* In some cases, the components are empty pointers (when used as placeholders).
|
|
*/
|
|
class TupleType: public CompositeType
|
|
{
|
|
public:
|
|
explicit TupleType(std::vector<Type const*> _types = {}): m_components(std::move(_types)) {}
|
|
|
|
Category category() const override { return Category::Tuple; }
|
|
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _other) const override;
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override { return nullptr; }
|
|
std::string toString(bool) const override;
|
|
bool canBeStored() const override { return false; }
|
|
u256 storageSize() const override;
|
|
bool hasSimpleZeroValueInMemory() const override { return false; }
|
|
Type const* mobileType() const override;
|
|
|
|
std::vector<Type const*> const& components() const { return m_components; }
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
std::vector<Type const*> decomposition() const override
|
|
{
|
|
// Currently calling TupleType::decomposition() is not expected, because we cannot declare a variable of a tuple type.
|
|
// If that changes, before removing the solAssert, make sure the function does the right thing and is used properly.
|
|
// Note that different tuple members can have different data locations, so using decomposition() to check
|
|
// the tuple validity for a data location might require special care.
|
|
solUnimplemented("Tuple decomposition is not expected.");
|
|
return m_components;
|
|
}
|
|
|
|
private:
|
|
std::vector<Type const*> const m_components;
|
|
};
|
|
|
|
/**
|
|
* The type of a function, identified by its (return) parameter types.
|
|
* @todo the return parameters should also have names, i.e. return parameters should be a struct
|
|
* type.
|
|
*/
|
|
class FunctionType: public Type
|
|
{
|
|
public:
|
|
/// How this function is invoked on the EVM.
|
|
enum class Kind
|
|
{
|
|
Internal, ///< stack-call using plain JUMP
|
|
External, ///< external call using CALL
|
|
DelegateCall, ///< external call using DELEGATECALL, i.e. not exchanging the storage
|
|
BareCall, ///< CALL without function hash
|
|
BareCallCode, ///< CALLCODE without function hash
|
|
BareDelegateCall, ///< DELEGATECALL without function hash
|
|
BareStaticCall, ///< STATICCALL without function hash
|
|
Creation, ///< external call using CREATE
|
|
Send, ///< CALL, but without data and gas
|
|
Transfer, ///< CALL, but without data and throws on error
|
|
KECCAK256, ///< KECCAK256
|
|
Selfdestruct, ///< SELFDESTRUCT
|
|
Revert, ///< REVERT
|
|
ECRecover, ///< CALL to special contract for ecrecover
|
|
SHA256, ///< CALL to special contract for sha256
|
|
RIPEMD160, ///< CALL to special contract for ripemd160
|
|
Event, ///< syntactic sugar for LOG*
|
|
Error, ///< creating an error instance in revert or require
|
|
Wrap, ///< customType.wrap(...) for user defined value types
|
|
Unwrap, ///< customType.unwrap(...) for user defined value types
|
|
SetGas, ///< modify the default gas value for the function call
|
|
SetValue, ///< modify the default value transfer for the function call
|
|
BlockHash, ///< BLOCKHASH
|
|
AddMod, ///< ADDMOD
|
|
MulMod, ///< MULMOD
|
|
ArrayPush, ///< .push() to a dynamically sized array in storage
|
|
ArrayPop, ///< .pop() from a dynamically sized array in storage
|
|
BytesConcat, ///< .concat() on bytes (type type)
|
|
ObjectCreation, ///< array creation using new
|
|
Assert, ///< assert()
|
|
Require, ///< require()
|
|
ABIEncode,
|
|
ABIEncodePacked,
|
|
ABIEncodeWithSelector,
|
|
ABIEncodeWithSignature,
|
|
ABIDecode,
|
|
GasLeft, ///< gasleft()
|
|
MetaType, ///< type(...)
|
|
/// Refers to a function declaration without calling context
|
|
/// (i.e. when accessed directly via the name of the containing contract).
|
|
/// Cannot be called.
|
|
Declaration,
|
|
};
|
|
|
|
/// Creates the type of a function.
|
|
/// @arg _kind must be Kind::Internal, Kind::External or Kind::Declaration.
|
|
explicit FunctionType(FunctionDefinition const& _function, Kind _kind = Kind::Declaration);
|
|
/// Creates the accessor function type of a state variable.
|
|
explicit FunctionType(VariableDeclaration const& _varDecl);
|
|
/// Creates the function type of an event.
|
|
explicit FunctionType(EventDefinition const& _event);
|
|
explicit FunctionType(ErrorDefinition const& _error);
|
|
/// Creates the type of a function type name.
|
|
explicit FunctionType(FunctionTypeName const& _typeName);
|
|
/// Function type constructor to be used for a plain type (not derived from a declaration).
|
|
FunctionType(
|
|
strings const& _parameterTypes,
|
|
strings const& _returnParameterTypes,
|
|
Kind _kind,
|
|
bool _arbitraryParameters = false,
|
|
StateMutability _stateMutability = StateMutability::NonPayable
|
|
): FunctionType(
|
|
parseElementaryTypeVector(_parameterTypes),
|
|
parseElementaryTypeVector(_returnParameterTypes),
|
|
strings(_parameterTypes.size(), ""),
|
|
strings(_returnParameterTypes.size(), ""),
|
|
_kind,
|
|
_arbitraryParameters,
|
|
_stateMutability
|
|
)
|
|
{
|
|
}
|
|
|
|
/// Detailed constructor, use with care.
|
|
FunctionType(
|
|
TypePointers _parameterTypes,
|
|
TypePointers _returnParameterTypes,
|
|
strings _parameterNames = strings(),
|
|
strings _returnParameterNames = strings(),
|
|
Kind _kind = Kind::Internal,
|
|
bool _arbitraryParameters = false,
|
|
StateMutability _stateMutability = StateMutability::NonPayable,
|
|
Declaration const* _declaration = nullptr,
|
|
bool _gasSet = false,
|
|
bool _valueSet = false,
|
|
bool _saltSet = false,
|
|
bool _bound = false
|
|
):
|
|
m_parameterTypes(std::move(_parameterTypes)),
|
|
m_returnParameterTypes(std::move(_returnParameterTypes)),
|
|
m_parameterNames(std::move(_parameterNames)),
|
|
m_returnParameterNames(std::move(_returnParameterNames)),
|
|
m_kind(_kind),
|
|
m_stateMutability(_stateMutability),
|
|
m_arbitraryParameters(_arbitraryParameters),
|
|
m_gasSet(_gasSet),
|
|
m_valueSet(_valueSet),
|
|
m_bound(_bound),
|
|
m_declaration(_declaration),
|
|
m_saltSet(_saltSet)
|
|
{
|
|
solAssert(
|
|
m_parameterNames.size() == m_parameterTypes.size(),
|
|
"Parameter names list must match parameter types list!"
|
|
);
|
|
solAssert(
|
|
m_returnParameterNames.size() == m_returnParameterTypes.size(),
|
|
"Return parameter names list must match return parameter types list!"
|
|
);
|
|
solAssert(
|
|
!m_bound || !m_parameterTypes.empty(),
|
|
"Attempted construction of bound function without self type"
|
|
);
|
|
}
|
|
|
|
Category category() const override { return Category::Function; }
|
|
|
|
/// @returns the type of the "new Contract" function, i.e. basically the constructor.
|
|
static FunctionTypePointer newExpressionType(ContractDefinition const& _contract);
|
|
|
|
TypePointers parameterTypes() const;
|
|
TypePointers const& parameterTypesIncludingSelf() const;
|
|
std::vector<std::string> parameterNames() const;
|
|
TypePointers const& returnParameterTypes() const { return m_returnParameterTypes; }
|
|
/// @returns the list of return parameter types. All dynamically-sized types (this excludes
|
|
/// storage pointers) are replaced by InaccessibleDynamicType instances.
|
|
TypePointers returnParameterTypesWithoutDynamicTypes() const;
|
|
std::vector<std::string> const& returnParameterNames() const { return m_returnParameterNames; }
|
|
/// @returns the "self" parameter type for a bound function
|
|
Type const* selfType() const;
|
|
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
BoolResult isImplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
TypeResult unaryOperatorResult(Token _operator) const override;
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override;
|
|
std::string canonicalName() const override;
|
|
std::string toString(bool _short) const override;
|
|
unsigned calldataEncodedSize(bool _padded) const override;
|
|
bool canBeStored() const override { return m_kind == Kind::Internal || m_kind == Kind::External; }
|
|
u256 storageSize() const override;
|
|
bool leftAligned() const override;
|
|
unsigned storageBytes() const override;
|
|
bool isValueType() const override { return true; }
|
|
bool nameable() const override;
|
|
bool hasSimpleZeroValueInMemory() const override { return false; }
|
|
MemberList::MemberMap nativeMembers(ASTNode const* _currentScope) const override;
|
|
Type const* encodingType() const override;
|
|
TypeResult interfaceType(bool _inLibrary) const override;
|
|
Type const* mobileType() const override;
|
|
|
|
/// @returns Type const* of a new FunctionType object. All input/return parameters are an
|
|
/// appropriate external types (i.e. the interfaceType()s) of input/return parameters of
|
|
/// current function.
|
|
/// @returns an empty shared pointer if one of the input/return parameters does not have an
|
|
/// external type.
|
|
FunctionTypePointer interfaceFunctionType() const;
|
|
|
|
/// @returns true if this function can take the given arguments (possibly
|
|
/// after implicit conversion).
|
|
/// @param _selfType if the function is bound, this has to be supplied and is the type of the
|
|
/// expression the function is called on.
|
|
bool canTakeArguments(
|
|
FuncCallArguments const& _arguments,
|
|
Type const* _selfType = nullptr
|
|
) const;
|
|
|
|
/// @returns true if the types of parameters are equal (does not check return parameter types)
|
|
bool hasEqualParameterTypes(FunctionType const& _other) const;
|
|
/// @returns true iff the return types are equal (does not check parameter types)
|
|
bool hasEqualReturnTypes(FunctionType const& _other) const;
|
|
/// @returns true iff the function type is equal to the given type, ignoring state mutability differences.
|
|
bool equalExcludingStateMutability(FunctionType const& _other) const;
|
|
|
|
/// @returns true if the ABI is NOT used for this call (only meaningful for external calls)
|
|
bool isBareCall() const;
|
|
Kind const& kind() const { return m_kind; }
|
|
StateMutability stateMutability() const { return m_stateMutability; }
|
|
/// @returns the external signature of this function type given the function name
|
|
std::string externalSignature() const;
|
|
/// @returns the external identifier of this function (the hash of the signature).
|
|
u256 externalIdentifier() const;
|
|
/// @returns the external identifier of this function (the hash of the signature) as a hex string.
|
|
std::string externalIdentifierHex() const;
|
|
Declaration const& declaration() const
|
|
{
|
|
solAssert(m_declaration, "Requested declaration from a FunctionType that has none");
|
|
return *m_declaration;
|
|
}
|
|
bool hasDeclaration() const { return !!m_declaration; }
|
|
/// @returns true if the result of this function only depends on its arguments,
|
|
/// does not modify the state and is a compile-time constant.
|
|
/// Currently, this will only return true for internal functions like keccak and ecrecover.
|
|
bool isPure() const;
|
|
bool isPayable() const { return m_stateMutability == StateMutability::Payable; }
|
|
/// @return A shared pointer of StructuredDocumentation.
|
|
/// Can contain a nullptr in which case indicates absence of documentation.
|
|
ASTPointer<StructuredDocumentation> documentation() const;
|
|
|
|
/// true iff arguments are to be padded to multiples of 32 bytes for external calls
|
|
/// The only functions that do not pad are hash functions, the low-level call functions
|
|
/// and abi.encodePacked.
|
|
bool padArguments() const;
|
|
bool takesArbitraryParameters() const { return m_arbitraryParameters; }
|
|
/// true iff the function takes a single bytes parameter and it is passed on without padding.
|
|
bool takesSinglePackedBytesParameter() const
|
|
{
|
|
switch (m_kind)
|
|
{
|
|
case FunctionType::Kind::KECCAK256:
|
|
case FunctionType::Kind::SHA256:
|
|
case FunctionType::Kind::RIPEMD160:
|
|
case FunctionType::Kind::BareCall:
|
|
case FunctionType::Kind::BareCallCode:
|
|
case FunctionType::Kind::BareDelegateCall:
|
|
case FunctionType::Kind::BareStaticCall:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bool gasSet() const { return m_gasSet; }
|
|
bool valueSet() const { return m_valueSet; }
|
|
bool saltSet() const { return m_saltSet; }
|
|
bool bound() const { return m_bound; }
|
|
|
|
/// @returns a copy of this type, where gas or value are set manually. This will never set one
|
|
/// of the parameters to false.
|
|
Type const* copyAndSetCallOptions(bool _setGas, bool _setValue, bool _setSalt) const;
|
|
|
|
/// @returns a copy of this function type with the `bound` flag set to true.
|
|
/// Should only be called on library functions.
|
|
FunctionTypePointer asBoundFunction() const;
|
|
|
|
/// @returns a copy of this function type where the location of reference types is changed
|
|
/// from CallData to Memory. This is the type that would be used when the function is
|
|
/// called externally, as opposed to the parameter types that are available inside the function body.
|
|
/// Also supports variants to be used for library or bound calls.
|
|
/// @param _inLibrary if true, uses DelegateCall as location.
|
|
FunctionTypePointer asExternallyCallableFunction(bool _inLibrary) const;
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
private:
|
|
static TypePointers parseElementaryTypeVector(strings const& _types);
|
|
|
|
TypePointers m_parameterTypes;
|
|
TypePointers m_returnParameterTypes;
|
|
std::vector<std::string> m_parameterNames;
|
|
std::vector<std::string> m_returnParameterNames;
|
|
Kind const m_kind;
|
|
StateMutability m_stateMutability = StateMutability::NonPayable;
|
|
/// true if the function takes an arbitrary number of arguments of arbitrary types
|
|
bool const m_arbitraryParameters = false;
|
|
bool const m_gasSet = false; ///< true iff the gas value to be used is on the stack
|
|
bool const m_valueSet = false; ///< true iff the value to be sent is on the stack
|
|
/// true iff the function is called as arg1.fun(arg2, ..., argn).
|
|
/// This is achieved through the "using for" directive.
|
|
bool const m_bound = false;
|
|
Declaration const* m_declaration = nullptr;
|
|
bool m_saltSet = false; ///< true iff the salt value to be used is on the stack
|
|
};
|
|
|
|
/**
|
|
* The type of a mapping, there is one distinct type per key/value type pair.
|
|
* Mappings always occupy their own storage slot, but do not actually use it.
|
|
*/
|
|
class MappingType: public CompositeType
|
|
{
|
|
public:
|
|
MappingType(Type const* _keyType, Type const* _valueType):
|
|
m_keyType(_keyType), m_valueType(_valueType) {}
|
|
|
|
Category category() const override { return Category::Mapping; }
|
|
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
std::string toString(bool _short) const override;
|
|
std::string canonicalName() const override;
|
|
bool containsNestedMapping() const override { return true; }
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override { return nullptr; }
|
|
Type const* encodingType() const override;
|
|
TypeResult interfaceType(bool _inLibrary) const override;
|
|
bool dataStoredIn(DataLocation _location) const override { return _location == DataLocation::Storage; }
|
|
/// Cannot be stored in memory, but just in case.
|
|
bool hasSimpleZeroValueInMemory() const override { solAssert(false, ""); }
|
|
bool nameable() const override { return true; }
|
|
|
|
Type const* keyType() const { return m_keyType; }
|
|
Type const* valueType() const { return m_valueType; }
|
|
|
|
protected:
|
|
std::vector<Type const*> decomposition() const override { return {m_valueType}; }
|
|
|
|
private:
|
|
Type const* m_keyType;
|
|
Type const* m_valueType;
|
|
};
|
|
|
|
/**
|
|
* The type of a type reference. The type of "uint32" when used in "a = uint32(2)" is an example
|
|
* of a TypeType.
|
|
* For super contracts or libraries, this has members directly.
|
|
*/
|
|
class TypeType: public Type
|
|
{
|
|
public:
|
|
explicit TypeType(Type const* _actualType): m_actualType(_actualType) {}
|
|
|
|
Category category() const override { return Category::TypeType; }
|
|
Type const* actualType() const { return m_actualType; }
|
|
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override { return nullptr; }
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
bool canBeStored() const override { return false; }
|
|
u256 storageSize() const override;
|
|
bool hasSimpleZeroValueInMemory() const override { solAssert(false, ""); }
|
|
std::string toString(bool _short) const override { return "type(" + m_actualType->toString(_short) + ")"; }
|
|
MemberList::MemberMap nativeMembers(ASTNode const* _currentScope) const override;
|
|
|
|
BoolResult isExplicitlyConvertibleTo(Type const& _convertTo) const override;
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override;
|
|
private:
|
|
Type const* m_actualType;
|
|
};
|
|
|
|
|
|
/**
|
|
* The type of a function modifier. Not used for anything for now.
|
|
*/
|
|
class ModifierType: public Type
|
|
{
|
|
public:
|
|
explicit ModifierType(ModifierDefinition const& _modifier);
|
|
|
|
Category category() const override { return Category::Modifier; }
|
|
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override { return nullptr; }
|
|
bool canBeStored() const override { return false; }
|
|
u256 storageSize() const override;
|
|
bool hasSimpleZeroValueInMemory() const override { solAssert(false, ""); }
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
std::string toString(bool _short) const override;
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override { return {}; }
|
|
private:
|
|
TypePointers m_parameterTypes;
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
* Special type for imported modules. These mainly give access to their scope via members.
|
|
*/
|
|
class ModuleType: public Type
|
|
{
|
|
public:
|
|
explicit ModuleType(SourceUnit const& _source): m_sourceUnit(_source) {}
|
|
|
|
Category category() const override { return Category::Module; }
|
|
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override { return nullptr; }
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
bool canBeStored() const override { return false; }
|
|
bool hasSimpleZeroValueInMemory() const override { solAssert(false, ""); }
|
|
MemberList::MemberMap nativeMembers(ASTNode const*) const override;
|
|
|
|
std::string toString(bool _short) const override;
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override { return {}; }
|
|
private:
|
|
SourceUnit const& m_sourceUnit;
|
|
};
|
|
|
|
/**
|
|
* Special type for magic variables (block, msg, tx, type(...)), similar to a struct but without any reference.
|
|
*/
|
|
class MagicType: public Type
|
|
{
|
|
public:
|
|
enum class Kind {
|
|
Block, ///< "block"
|
|
Message, ///< "msg"
|
|
Transaction, ///< "tx"
|
|
ABI, ///< "abi"
|
|
MetaType ///< "type(...)"
|
|
};
|
|
|
|
public:
|
|
explicit MagicType(Kind _kind): m_kind(_kind) {}
|
|
explicit MagicType(Type const* _metaTypeArg): m_kind{Kind::MetaType}, m_typeArgument{_metaTypeArg} {}
|
|
|
|
Category category() const override { return Category::Magic; }
|
|
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
std::string richIdentifier() const override;
|
|
bool operator==(Type const& _other) const override;
|
|
bool canBeStored() const override { return false; }
|
|
bool hasSimpleZeroValueInMemory() const override { solAssert(false, ""); }
|
|
MemberList::MemberMap nativeMembers(ASTNode const*) const override;
|
|
|
|
std::string toString(bool _short) const override;
|
|
|
|
Kind kind() const { return m_kind; }
|
|
|
|
Type const* typeArgument() const;
|
|
|
|
protected:
|
|
std::vector<std::tuple<std::string, Type const*>> makeStackItems() const override { return {}; }
|
|
private:
|
|
Kind m_kind;
|
|
/// Contract type used for contract metadata magic.
|
|
Type const* m_typeArgument;
|
|
};
|
|
|
|
/**
|
|
* Special type that is used for dynamic types in returns from external function calls
|
|
* (The EVM currently cannot access dynamically-sized return values).
|
|
*/
|
|
class InaccessibleDynamicType: public Type
|
|
{
|
|
public:
|
|
Category category() const override { return Category::InaccessibleDynamic; }
|
|
|
|
std::string richIdentifier() const override { return "t_inaccessible"; }
|
|
BoolResult isImplicitlyConvertibleTo(Type const&) const override { return false; }
|
|
BoolResult isExplicitlyConvertibleTo(Type const&) const override { return false; }
|
|
TypeResult binaryOperatorResult(Token, Type const*) const override { return nullptr; }
|
|
unsigned calldataEncodedSize(bool) const override { return 32; }
|
|
bool canBeStored() const override { return false; }
|
|
bool isValueType() const override { return true; }
|
|
bool hasSimpleZeroValueInMemory() const override { solAssert(false, ""); }
|
|
std::string toString(bool) const override { return "inaccessible dynamic type"; }
|
|
Type const* decodingType() const override;
|
|
};
|
|
|
|
}
|