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/pow.zig b/lib/std/math/complex/pow.zig
new file mode 100644
index 0000000000..a2480453fc
--- /dev/null
+++ b/lib/std/math/complex/pow.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 z raised to the complex power of c.
+pub fn pow(comptime T: type, z: T, c: T) T {
+    const p = cmath.log(z);
+    const q = c.mul(p);
+    return cmath.exp(q);
+}
+
+const epsilon = 0.0001;
+
+test "complex.cpow" {
+    const a = Complex(f32).new(5, 3);
+    const b = Complex(f32).new(2.3, -1.3);
+    const c = pow(Complex(f32), a, b);
+
+    testing.expect(math.approxEq(f32, c.re, 58.049110, epsilon));
+    testing.expect(math.approxEq(f32, c.im, -101.003433, epsilon));
+}