std::less< void > Class Reference

Function object that can be invoked for less than comparisons, specialized for type deduction. More...

Public Types
using	first_argument_type
	Type of the first value to compare.
using	is_transparent = void
	Denotes that this is a transparent function object type.
using	result_type
	Result type of invoking this object.
using	second_argument_type
	Type of the second value to compare.

Public Member Functions
template<class T, class U, arene::base::constraints< enable_if_t<(is_pointer_v< decay_t< T > > &&is_same_v< decay_t< U >, nullptr_t >)>>
constexpr auto	operator() (T &&, U &&) const noexcept -> bool
	Returns if the first value is less than the second.
template<class T, class U, arene::base::constraints< enable_if_t<(is_pointer_v< decay_t< U > > &&is_same_v< decay_t< T >, nullptr_t >)>>
constexpr auto	operator() (T &&, U &&rhs) const noexcept -> bool
	Returns if the first value is less than the second.
template<class T, class U, arene::base::constraints< enable_if_t<!(is_pointer_v< decay_t< T > > &&is_same_v< decay_t< U >, nullptr_t >)>, enable_if_t<!(is_pointer_v< decay_t< U > > &&is_same_v< decay_t< T >, nullptr_t >)>>
constexpr auto	operator() (T &&lhs, U &&rhs) const noexcept(noexcept(std::forward< T >(lhs)< std::forward< U >(rhs))) ->
	Returns if the first value is less than the second.
constexpr auto	operator() (void const &lhs, void const &rhs) const noexcept(noexcept(lhs< rhs)) -> bool
	Returns if the first value is less than the second.

Detailed Description

Function object that can be invoked for less than comparisons, specialized for type deduction.

Member Typedef Documentation

first_argument_type

using std::less< void >::first_argument_type

Type of the first value to compare.

is_transparent

using std::less< void >::is_transparent = void

Denotes that this is a transparent function object type.

result_type

using std::less< void >::result_type

Result type of invoking this object.

second_argument_type

using std::less< void >::second_argument_type

Type of the second value to compare.

Member Function Documentation

operator()() [1/4]

template<class T, class U, arene::base::constraints< enable_if_t<(is_pointer_v< decay_t< T > > &&is_same_v< decay_t< U >, nullptr_t >)>>

auto std::less< void >::operator() ( T && , U &&  ) const -> bool

inlineconstexprnoexcept

Returns if the first value is less than the second.

This overload checks if a pointer is less than nullptr which is always false

Template Parameters

T	The first type
U	The second type

Returns

Returns the boolean result of invoking operator< on the supplied values

operator()() [2/4]

template<class T, class U, arene::base::constraints< enable_if_t<(is_pointer_v< decay_t< U > > &&is_same_v< decay_t< T >, nullptr_t >)>>

auto std::less< void >::operator() ( T && , U && rhs ) const -> bool

inlineconstexprnoexcept

Returns if the first value is less than the second.

This overload checks if nullptr is less than a supplied pointer

Template Parameters

T	The first type
U	The second type

Parameters

rhs	The pointer value to compare

Returns

Returns the boolean result of invoking operator< on the supplied values

operator()() [3/4]

template<class T, class U, arene::base::constraints< enable_if_t<!(is_pointer_v< decay_t< T > > &&is_same_v< decay_t< U >, nullptr_t >)>, enable_if_t<!(is_pointer_v< decay_t< U > > &&is_same_v< decay_t< T >, nullptr_t >)>>

auto std::less< void >::operator() ( T && lhs, U && rhs ) const ->

inlineconstexprnoexcept

Returns if the first value is less than the second.

Template Parameters

T	The first type
U	The second type

Parameters

lhs	The first value to compare
rhs	The second value to compare

Returns

Returns the boolean result of invoking operator< on lhs and rhs

operator()() [4/4]

auto std::less< void >::operator() ( void const & lhs, void const & rhs ) const-> bool

inlineconstexprnoexcept

Returns if the first value is less than the second.

Parameters

lhs	The first value to compare
rhs	The second value to compare

Returns

Returns the boolean result of invoking operator< on lhs and rhs

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

• stdlib/include/stdlib_detail/less.hpp