[#RandomNumberGenerator]
= RandomNumberGenerator
:mrdocs:

A concept for RandomMixin‐based random number generators.

== Synopsis

Declared in `<random.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
concept RandomNumberGenerator = requires(T& rng, std::span<std::byte> s) {
    // A random number generator must provide rand64().
    { rng.rand64() } noexcept ‐> std::same_as<uint64_t>;
    // A random number generator must derive from RandomMixin, which adds other rand* functions.
    requires std::derived_from<std::remove_reference_t<T>, RandomMixin<std::remove_reference_t<T>>>;
};
----


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