From 3acedd4cd95e75f04714590f5dbd5876e3a936e8 Mon Sep 17 00:00:00 2001
From: Koki Fushimi <paalon1936@gmail.com>
Date: Sat, 2 Jun 2018 00:20:28 +0900
Subject: [PATCH] Add imaginary unit. (#7922)

---
 lib/pure/complex.nim | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/pure/complex.nim b/lib/pure/complex.nim
index 98cab1a5ae..ba5c571ce1 100644
--- a/lib/pure/complex.nim
+++ b/lib/pure/complex.nim
@@ -25,6 +25,10 @@ type
   Complex* = tuple[re, im: float]
     ## a complex number, consisting of a real and an imaginary part
 
+const
+  im*: Complex = (re: 0.0, im: 1.0)
+    ## The imaginary unit. √-1.
+
 proc toComplex*(x: SomeInteger): Complex =
   ## Convert some integer ``x`` to a complex number.
   result.re = x