std::uniform_random_bit_generator

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< cpp‎ | numeric‎ | random
C++
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Pseudo-random number generation
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Defined in header <random>
template < class G >

concept uniform_random_bit_generator =
std::invocable <G& > && std::unsigned_integral < std::invoke_result_t <G& >> &&
    requires {
{ G:: min ( ) } - > std::same_as < std::invoke_result_t <G& >> ;
{ G:: max ( ) } - > std::same_as < std::invoke_result_t <G& >> ;
        requires std::bool_constant < (G:: min ( ) < G:: max ( ) ) > :: value ;

} ;
(since C++20)

The concept uniform_random_bit_generator<G> specifies that G is the type of a uniform random bit generator, that is, objects of type G

Semantic requirements

uniform_random_bit_generator<G> is modeled only if, given any object g of type G:

  • g() is in the range [ G::min() ,  G::max() ]
  • g() has amortized constant complexity.

Notes

In order to satisfy the requirement std::bool_constant < (G:: min ( ) < G:: max ( ) ) > :: value , both G::min() and G::max() must be constant expressions, and the result of the comparison must be true

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