utils::AnyMovable Class Reference

Replacement for std::any that is not copyable. It allows to store non-copyable and even non-movable types. More...

#include <userver/utils/any_movable.hpp>

Classes
struct	HolderBase

Public Member Functions
constexpr	AnyMovable () noexcept=default
	Creates an empty AnyMovable
	AnyMovable (AnyMovable &&) noexcept=default
	AnyMovable is movable, but not copyable
AnyMovable &	operator= (AnyMovable &&) noexcept=default
template<typename ValueType , typename = std::enable_if_t<!std::is_same_v< AnyMovable, std::decay_t<ValueType>>>>
	AnyMovable (ValueType &&value)
template<typename ValueType , typename... Args>
	AnyMovable (std::in_place_type_t< ValueType > tag, Args &&... args)
	In-place constructs an object of the specified type.
template<typename ValueType , typename Item , typename... Args>
	AnyMovable (std::in_place_type_t< ValueType > tag, std::initializer_list< Item > list, Args &&... args)
	In-place constructs an object of the specified type.
template<typename ValueType >
AnyMovable &	operator= (ValueType &&rhs)
bool	HasValue () const noexcept
	Check if the AnyMovable is empty.
void	Reset () noexcept
	Destroy the old contents, making *this empty.
template<typename ValueType , typename... Args>
void	Emplace (Args &&... args)
	In-place constructs an object of the specified type.
template<typename ValueType , typename Item , typename... Args>
void	Emplace (std::initializer_list< Item > list, Args &&... args)
	In-place constructs an object of the specified type.

Friends
template<typename ValueType >
ValueType *	AnyCast (AnyMovable *) noexcept
template<typename ValueType >
const ValueType *	AnyCast (const AnyMovable *) noexcept

Detailed Description

Replacement for std::any that is not copyable. It allows to store non-copyable and even non-movable types.

Usage example:

  utils::AnyMovable a{std::string("Hello")};
  EXPECT_EQ(utils::AnyCast<std::string&>(a), "Hello");
  EXPECT_THROW(utils::AnyCast<int>(a), utils::BadAnyMovableCast);

Definition at line 24 of file any_movable.hpp.

Constructor & Destructor Documentation

AnyMovable() [1/3]

template<typename ValueType , typename >

utils::AnyMovable::AnyMovable

(

ValueType &&

value

)

Copies or moves the provided object inside the AnyMovable. const, reference, arrays and function pointers are decayed.

Definition at line 153 of file any_movable.hpp.

AnyMovable() [2/3]

template<typename ValueType , typename... Args>

utils::AnyMovable::AnyMovable ( std::in_place_type_t< ValueType >  tag, Args &&...  args  )

explicit

In-place constructs an object of the specified type.

Definition at line 164 of file any_movable.hpp.

AnyMovable() [3/3]

template<typename ValueType , typename Item , typename... Args>

utils::AnyMovable::AnyMovable ( std::in_place_type_t< ValueType >  tag, std::initializer_list< Item >  list, Args &&...  args  )

explicit

In-place constructs an object of the specified type.

Definition at line 168 of file any_movable.hpp.

Member Function Documentation

Emplace() [1/2]

template<typename ValueType , typename... Args>

void utils::AnyMovable::Emplace

(

Args &&...

args

)

In-place constructs an object of the specified type.

Definition at line 179 of file any_movable.hpp.

Emplace() [2/2]

template<typename ValueType , typename Item , typename... Args>

void utils::AnyMovable::Emplace	(	std::initializer_list< Item >	list,
		Args &&...	args
	)

In-place constructs an object of the specified type.

Definition at line 184 of file any_movable.hpp.

operator=()

template<typename ValueType >

AnyMovable & utils::AnyMovable::operator=

(

ValueType &&

rhs

)

Copies or moves the provided object inside the AnyMovable. const, reference, arrays and function pointers are decayed.

Definition at line 173 of file any_movable.hpp.

Friends And Related Symbol Documentation

AnyCast [1/2]

template<typename ValueType >

ValueType * AnyCast ( AnyMovable *  operand )

friend

Returns

nullptr if operand is nullptr or type of the data stored in operand does not match ValueType

Definition at line 189 of file any_movable.hpp.

AnyCast [2/2]

template<typename ValueType >

const ValueType * AnyCast ( const AnyMovable *  operand )

friend

Returns

nullptr if operand is nullptr or type of the data stored in operand does not match ValueType

Definition at line 194 of file any_movable.hpp.

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The documentation for this class was generated from the following file:

• userver/utils/any_movable.hpp