From cc7479b70f3f6aeb066229ab451facf3f1eff77f Mon Sep 17 00:00:00 2001
From: Vindaar <basti90@gmail.com>
Date: Thu, 28 Jun 2018 00:33:15 +0200
Subject: [PATCH] improve error message if literal ends with an underscore
 (#8114)

---
 compiler/lexer.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler/lexer.nim b/compiler/lexer.nim
index cd2778d3c..375bf227d 100644
--- a/compiler/lexer.nim
+++ b/compiler/lexer.nim
@@ -344,7 +344,8 @@ proc getNumber(L: var TLexer, result: var TToken) =
       if buf[pos] == '_':
         if buf[pos+1] notin chars:
           lexMessage(L, errGenerated,
-            "only single underscores may occur in a token: '__' is invalid")
+            "only single underscores may occur in a token and token may not " &
+            "end with an underscore: e.g. '1__1' and '1_' are invalid")
           break
         add(tok.literal, '_')
         inc(pos)