factorial.hpp File Reference

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Namespaces
namespace	internal

Functions
template<typename T >
constexpr T	internal::factorial_table (const T x) noexcept
template<typename T , typename std::enable_if< std::is_integral< T >::value >::type * = nullptr>
constexpr T	internal::factorial_recur (const T x) noexcept
template<typename T >
constexpr T	factorial (const T x) noexcept
	Compile-time factorial function. More...

Function Documentation

factorial()

template<typename T >

constexpr T factorial ( const T  x )

constexprnoexcept

Compile-time factorial function.

Parameters

x	a real-valued input.

Returns

Computes the factorial value \( x! \). When x is an integral type (int, long int, etc.), a simple recursion method is used, along with table values. When x is real-valued, factorial(x) = tgamma(x+1).