1const std = @import("../../std.zig");
 2const testing = std.testing;
 3const math = std.math;
 4const cmath = math.complex;
 5const Complex = cmath.Complex;
 6
 7/// Returns the angular component (in radians) of z.
 8pub fn arg(z: anytype) @TypeOf(z.re, z.im) {
 9    return math.atan2(z.im, z.re);
10}
11
12test arg {
13    const epsilon = math.floatEps(f32);
14    const a = Complex(f32).init(5, 3);
15    const c = arg(a);
16    try testing.expectApproxEqAbs(0.5404195, c, epsilon);
17}