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Tolerance< T > Class Template Reference

Detailed Description

template<class T>
class lemon::Tolerance< T >

Tolerance is a class to provide a basic way to handle the comparison of numbers that are obtained as a result of a probably inexact computation.

The general implementation is suitable only if the data type is exact, like the integer types, otherwise a specialized version must be implemented. These specialized classes like Tolerance<double> may offer additional tuning parameters.

See Also
Tolerance<long double>

#include <lemon/tolerance.h>

Static Public Member Functions

static Value zero ()
 Returns the zero value.

The concept is that these bool functions return true only if the related comparisons hold even if some numerical error appeared during the computations.

static bool less (Value a, Value b)
 Returns true if a is surely strictly less than b.
static bool different (Value a, Value b)
 Returns true if a is surely different from b.
static bool positive (Value a)
 Returns true if a is surely positive.
static bool negative (Value a)
 Returns true if a is surely negative.
static bool nonZero (Value a)
 Returns true if a is surely non-zero.