Add `len` for tuples

2019-10-02 16:24:59 +03:00 · 2019-10-02 16:24:59 +03:00 · 2bdd2fab6e
parent 62c1bebe2e
commit 2bdd2fab6e
1 changed files with 7 additions and 0 deletions
--- a/stew/objects.nim
+++ b/stew/objects.nim
@ -24,3 +24,10 @@ proc toArray*[T](N: static int, data: openarray[T]): array[N, T] =
 template anonConst*(val: untyped): untyped =
  const c = val
  c
+
+when not compiles(len((1, 2))):
+  import typetraits
+
+  func len*(x: tuple): int =
+    arity(type(x))
+