std::experimental::ranges:: UniformRandomNumberGenerator

From cppreference.com
C++
Experimental
Ranges
Concepts library
template < class G >

concept bool UniformRandomNumberGenerator =
Invocable < G & > &&
UnsignedIntegral < std:: result_of_t < G & ( ) >> &&
requires {
{ G :: min ( ) } - > Same < std:: result_of_t < G & ( ) >> && ;
{ G :: max ( ) } - > Same < std:: result_of_t < G & ( ) >> && ;

} ;
(ranges TS)

The concept UniformRandomNumberGenerator<G> specifies that G is the type of a uniform random number 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.

UniformRandomNumberGenerator<G> is satisfied only if, given any object g of type G :

  • G::min() and G::max() are prvalue constant expressions;
  • G::min() < G::max()
  • g() is in the range [G::min(), G::max()]
  • g() has amortized constant complexity.
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