Struct __contains_fn#

Struct Documentation#

struct __contains_fn#

Public Functions

template<std::input_iterator I, std::sentinel_for<I> S, typename T, typename Proj = std::identity>
inline constexpr bool operator()(I first, S last, const T &value, Proj proj = {}) const#

Search-based algorithm that checks whether or not a given range contains a value with iterator-sentinel pairs.

Parameters:

  • first – The range of elements to examine.

  • last – The range of elements to examine.

  • value – Value to compare the elements to.

  • proj – Projection to apply to the elements.

Returns:

std::ranges::find(std::move(first), last, value, proj) != last.

template<ranges::input_range R, typename T, typename Proj = std::identity>
inline constexpr bool operator()(R &&r, const T &value, Proj proj = {}) const#

Search-based algorithm that checks whether or not a given range contains a value with iterator-sentinel pairs.

Parameters:

  • r – The range of the elements to examine.

  • value – Value to compare the elements to.

  • proj – Projection to apply to the elements.

Returns:

std::ranges::find(std::move(first), last, value, proj) != last.