From b1a369d2fbb89112d90e54a34f94d4aae1bd1bc6 Mon Sep 17 00:00:00 2001
From: Zajcev Evgeny <zevlg@yandex.ru>
Date: Mon, 7 Nov 2016 13:21:17 +0300
Subject: [PATCH] [enh] isUpperAscii*, isLowerAscii* speedup execution by
 stopping       iteration as soon as possible

---
 lib/pure/strutils.nim | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lib/pure/strutils.nim b/lib/pure/strutils.nim
index bfc32bc71d..129869373d 100644
--- a/lib/pure/strutils.nim
+++ b/lib/pure/strutils.nim
@@ -179,9 +179,10 @@ proc isLowerAscii*(s: string): bool {.noSideEffect, procvar,
   if s.len() == 0:
     return false
 
-  result = true
   for c in s:
-    result = c.isLowerAscii() and result
+    if not c.isLowerAscii():
+      return false
+  true
 
 proc isUpperAscii*(s: string): bool {.noSideEffect, procvar,
   rtl, extern: "nsuIsUpperAsciiStr".}=
@@ -193,9 +194,10 @@ proc isUpperAscii*(s: string): bool {.noSideEffect, procvar,
   if s.len() == 0:
     return false
 
-  result = true
   for c in s:
-    result = c.isUpperAscii() and result
+    if not c.isUpperAscii():
+      return false
+  true
 
 proc toLowerAscii*(c: char): char {.noSideEffect, procvar,
   rtl, extern: "nsuToLowerAsciiChar".} =