std::experimental::ranges::UniformRandomNumberGenerator

 

C++

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Technical specifications

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Core language concepts
Same DerivedFrom ConvertibleTo	CommonReference Common	Integral SignedIntegral UnsignedIntegral	Assignable SwappableSwappableWith
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Destructible Constructible DefaultConstructible	MoveConstructible CopyConstructible	Movable Copyable	Semiregular Regular
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URNG concept
UniformRandomNumberGenerator

 

Defined in header <experimental/ranges/random>
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.