#
template<class T>
TypeTraits struct

Traits class for numeric types.

### Contents

- Reference

Traits classes are usable for detecting type features at compile time without the need for repeated code such as method overloading or template specialization for given types.

## Public types

- using FloatingPointType = U
- Corresponding floating-point type for normalization.

## Public static functions

- static auto name() -> const char* constexpr
- Type name.
- static auto epsilon() -> T constexpr
- Epsilon value for fuzzy compare.
- static auto equals(T a, T b) -> bool
- Fuzzy compare.
- static auto equalsZero(T a, T magnitude) -> bool
- Fuzzy compare to zero with magnitude.

## Typedef documentation

###
template<class T>
typedef U Magnum::Math::TypeTraits<T>::FloatingPointType

Corresponding floating-point type for normalization.

If the type is not already floating-point, defines smallest larger floating-point type.

## Function documentation

###
template<class T>
static const char* Magnum::Math::TypeTraits<T>:: name() constexpr

Type name.

Returns a string representation of type name, such as `"UnsignedInt"`

for UnsignedInt.

###
template<class T>
static T Magnum::Math::TypeTraits<T>:: epsilon() constexpr

Epsilon value for fuzzy compare.

Returns minimal difference between numbers to be considered inequal. Returns 1 for integer types and reasonably small value for floating-point types. Not implemented for arbitrary types.

###
template<class T>
static bool Magnum::Math::TypeTraits<T>:: equalsZero(T a,
T magnitude)

Fuzzy compare to zero with magnitude.

Uses fuzzy compare for floating-point types (using epsilon() value), pure equality comparison everywhere else. Use this function when comparing e.g. a calculated nearly-zero difference with zero, knowing the magnitude of original values so the epsilon can be properly scaled. In other words, the following lines are equivalent:

Float a, b; Math::TypeTraits<Float>::equals(a, b); Math::TypeTraits<Float>::equalsZero(a - b, Math::max(Math::abs(a), Math::abs(b)));