NAME¶

std::uniform_random_bit_generator - std::uniform_random_bit_generator

Synopsis¶

Defined in header <random>
template< class G >

concept uniform_random_bit_generator =
std::invocable<G&> &&
std::unsigned_integral<std::invoke_result_t<G&>> &&
requires { (since C++20)
{ 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;

};

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 is a function object
returning unsigned integer values such that each value in the range of possible
results has (ideally) equal probability of being returned.

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.