From: helly <helly@642ea486-5414-0410-9d7f-a0204ed87703>
Date: Sat, 15 Apr 2006 19:31:26 +0000 (+0000)
Subject: - Add docu
X-Git-Tag: 0.13.6~389
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=857026f7f06cc07f00786c08e86f82980f4d0a84;p=re2c

- Add docu
---

diff --git a/lessons/001_upn_calculator/calc_006.s.re b/lessons/001_upn_calculator/calc_006.s.re
index 8e16b25d..d7947ccf 100755
--- a/lessons/001_upn_calculator/calc_006.s.re
+++ b/lessons/001_upn_calculator/calc_006.s.re
@@ -29,6 +29,12 @@
     arise when the second last character is a "0" and the last is any digit.
     
     if (l > 1 && s[l-2] == '0' && s[l-1] >= '0' && s[l-1] <= '9') return 2;
+    
+    However in this example the above check is only necessary if the input is 
+    not terminated by a trailing zero check. In other words it would be used 
+    when reading from a file and directly working on the read buffers. For 
+    zero terminated string input the generated scanner will always find the 
+    terminating zero.
 
 - optimizing the generated code by using -s command line switch of re2c
   . This tells re2c to generate code that uses if statements rather