fl::test::Approx Class Reference

Detailed Description

Helper class for approximate floating-point comparisons.

Supports both relative (epsilon) and absolute (margin) tolerance.

Usage: FL_CHECK(value == fl::test::Approx(expected)); FL_CHECK(value == fl::test::Approx(expected).epsilon(0.01)); // 1% relative FL_CHECK(value == fl::test::Approx(expected).margin(0.001)); // absolute margin

Comparison formula: |actual - expected| <= margin OR |actual - expected| <= epsilon * (scale + max(|actual|, |expected|))

By default: epsilon=1e-5, margin=0.0 (only epsilon comparison)

Definition at line 396 of file fltest.h.

#include <fltest.h>

Public Member Functions
	Approx (double value) FL_NOEXCEPT
Approx &	epsilon (double newEpsilon) FL_NOEXCEPT
	Set custom relative epsilon for comparison Comparison uses: epsilon * (scale + max(|a|, |b|))
double	getEpsilon () const FL_NOEXCEPT
double	getMargin () const FL_NOEXCEPT
double	getScale () const FL_NOEXCEPT
Approx &	margin (double newMargin) FL_NOEXCEPT
	Set absolute margin for comparison When margin > 0, passes if |a - b| <= margin.
Approx &	scale (double newScale) FL_NOEXCEPT
	Set custom scale for comparison.
double	value () const FL_NOEXCEPT

Private Attributes
double	mEpsilon
double	mMargin
double	mScale
double	mValue

Friends
bool	operator!= (const Approx &lhs, double rhs) FL_NOEXCEPT
bool	operator!= (double lhs, const Approx &rhs) FL_NOEXCEPT
bool	operator< (double lhs, const Approx &rhs) FL_NOEXCEPT
bool	operator<= (double lhs, const Approx &rhs) FL_NOEXCEPT
bool	operator== (const Approx &lhs, double rhs) FL_NOEXCEPT
bool	operator== (double lhs, const Approx &rhs) FL_NOEXCEPT
bool	operator> (double lhs, const Approx &rhs) FL_NOEXCEPT
bool	operator>= (double lhs, const Approx &rhs) FL_NOEXCEPT

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The documentation for this class was generated from the following file:

• fl/test/fltest.h