From 857026f7f06cc07f00786c08e86f82980f4d0a84 Mon Sep 17 00:00:00 2001
From: helly <helly@642ea486-5414-0410-9d7f-a0204ed87703>
Date: Sat, 15 Apr 2006 19:31:26 +0000
Subject: [PATCH] - Add docu
---
lessons/001_upn_calculator/calc_006.s.re | 6 ++++++
1 file changed, 6 insertions(+)
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
--
2.40.0