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This is an example of documentation generated by ZigDoc, an alternative to Zig's built-in Auto Doc feature. See also examples in other modes/formats. The project being documented here (as the example) is the Zig standard library. Public Function

approxEqAbs

Public Function
std.math.approxEqAbs
pub fn approxEqAbs(comptime T: type, x: T, y: T, tolerance: T) bool

Performs an approximate comparison of two floating point values x and y. Returns true if the absolute difference between them is less or equal than the specified tolerance.

The tolerance parameter is the absolute tolerance used when determining if the two numbers are close enough; a good value for this parameter is a small multiple of floatEps(T).

Note that this function is recommended for comparing small numbers around zero; using approxEqRel is suggested otherwise.

NaN values are never considered equal to any value.

Params

  • T: type
  • x: T
  • y: T
  • tolerance: T

File

math.zig:77
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pub fn approxEqAbs(comptime T: type, x: T, y: T, tolerance: T) bool {
    comptime assert(@typeInfo(T) == .float or @typeInfo(T) == .comptime_float);
    assert(tolerance >= 0);

    // Fast path for equal values (and signed zeros and infinites).
    if (x == y)
        return true;

    if (isNan(x) or isNan(y))
        return false;

    return @abs(x - y) <= tolerance;
}