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|  | cppx::CPPX_USE_STD (basic_string_view, begin, binary_search, bitset, end, find, initializer_list) | 
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| template<class Char > | 
| auto | cppx::is_in (const basic_string_view< Char > &sv, const Char ch) noexcept -> Truth | 
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| template<class Item , class Value > | 
| auto | cppx::is_in (const initializer_list< Item > &items, const Value &v) noexcept -> Truth | 
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| template<size_t n> | 
| auto | cppx::is_in (const bitset< n > &bits, const int i) noexcept -> Truth | 
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| template<class It , class Arg > | 
| auto | cppx::is_in_span (const It begin, const It end, const Arg &v) -> Truth | 
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| template<class Key , Size n, class Arg > | 
| auto | cppx::is_in (Raw_array_of_< n, const Key > &a, const Arg &v) -> Truth | 
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| template<class It , class Arg > | 
| auto | cppx::is_in_sorted_span (const It begin, const It end, const Arg &v) -> Truth | 
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| template<class Key , Size n, class Arg > | 
| auto | cppx::is_in_sorted (Raw_array_of_< n, const Key > &a, const Arg &v) -> Truth | 
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