sgn.hpp File Reference

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Functions
template<typename T >
constexpr int	sgn (const T x) noexcept
	Compile-time sign function. More...

Function Documentation

sgn()

template<typename T >

constexpr int sgn ( const T  x )

constexprnoexcept

Compile-time sign function.

Parameters

x	a real-valued input

Returns

a value \( y \) such that

\[ y = \begin{cases} 1 \ &\text{ if } x > 0 \\ 0 \ &\text{ if } x = 0 \\ -1 \ &\text{ if } x < 0 \end{cases} \]