Merge pull request #3315 from ziglang/mv-std-lib

Move std/ to lib/std/

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/std/math/complex/asinh.zig b/lib/std/math/complex/asinh.zig
new file mode 100644
index 0000000000..da065aad01
--- /dev/null
+++ b/lib/std/math/complex/asinh.zig
@@ -0,0 +1,23 @@
+const std = @import("../../std.zig");
+const testing = std.testing;
+const math = std.math;
+const cmath = math.complex;
+const Complex = cmath.Complex;
+
+/// Returns the hyperbolic arc-sine of z.
+pub fn asinh(z: var) Complex(@typeOf(z.re)) {
+    const T = @typeOf(z.re);
+    const q = Complex(T).new(-z.im, z.re);
+    const r = cmath.asin(q);
+    return Complex(T).new(r.im, -r.re);
+}
+
+const epsilon = 0.0001;
+
+test "complex.casinh" {
+    const a = Complex(f32).new(5, 3);
+    const c = asinh(a);
+
+    testing.expect(math.approxEq(f32, c.re, 2.459831, epsilon));
+    testing.expect(math.approxEq(f32, c.im, 0.533999, epsilon));
+}