From 867b38496b234df22ab34ef15344f848278b096d Mon Sep 17 00:00:00 2001
From: apense <apense@users.noreply.github.com>
Date: Tue, 9 Jun 2015 16:24:13 -0400
Subject: [PATCH] Moved negative indexing operator here

Only used here (not in standard library)
---
 compiler/ast.nim | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/ast.nim b/compiler/ast.nim
index dc190fd7f..f48003797 100644
--- a/compiler/ast.nim
+++ b/compiler/ast.nim
@@ -948,6 +948,9 @@ proc add*(father, son: PNode) =
 proc `[]`*(n: PNode, i: int): PNode {.inline.} =
   result = n.sons[i]
 
+template `-|`*(b, s: expr): expr =
+  (if b >= 0: b else: s.len + b)
+
 # son access operators with support for negative indices
 template `{}`*(n: PNode, i: int): expr = n[i -| n]
 template `{}=`*(n: PNode, i: int, s: PNode): stmt =