signbit()

template<typename ADType , require_autodiff_t< ADType > * = nullptr>

bool stan::math::signbit ( ADType &&  v )

inline

Return true if the specified argument is negative and false otherwise.

Overloads std::signbit from <cmath> for argument-dependent lookup.

Template Parameters

ADType

type of argument

Parameters

[in]

v

argument

Returns

true if the argument is negative

Definition at line 21 of file signbit.hpp.