From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 21 Nov 2006 20:54:35 +0000 (+0000)
Subject: * doc/autoconf.texi: Mention that if (i in a) doesn't work with traditional Awk.
X-Git-Tag: AUTOCONF-2.61a~41
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d352fa108d38c069f384e0a89e213792743eb35a;p=thirdparty%2Fautoconf.git

* doc/autoconf.texi: Mention that if (i in a) doesn't work with traditional Awk.
---

diff --git a/ChangeLog b/ChangeLog
index 737d523f..1ef52996 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,7 @@
 	that traditional Awk lacks 3-arg "split".  It has it.
 	Mention that FS must be a single character, and a few other
 	99-byte limits of traditional Awk.
+	Mention that if (i in a) doesn't work with traditional Awk.
 
 2006-11-18  Paul Eggert  <eggert@cs.ucla.edu>
 
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 06651d30..f95d6204 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -13046,23 +13046,26 @@ Traditional Awk supports only the predefined functions @code{exp},
 Traditional Awk @code{getline} is not at all compatible with Posix;
 avoid it.
 
-In traditional Awk, @code{FS} must be a string containing just one
-ordinary character, and similarly for the field-separator argument to
-@code{split}.
+Traditional Awk has @code{for (i in a) @dots{}} but no other uses of the
+@code{in} keyword.  For example, it lacks @code{if (i in a) @dots{}}.
+
+In code portable to both traditional and modern Awk, @code{FS} must be a
+string containing just one ordinary character, and similarly for the
+field-separator argument to @code{split}.
 
 Traditional Awk has a limit of 99
 fields in a record.  You may be able to circumvent this problem by using
 @code{split}.
 
+Traditional Awk has a limit of at most 99 bytes in a number formatted by
+@code{OFMT}; for example, @code{OFMT="%.300e"; print 0.1;} typically
+dumps core.
+
 The original version of Awk had a limit of at most 99 bytes per
 @code{split} field, 99 bytes per @code{substr} substring, and 99 bytes
 per run of non-special characters in a @code{printf} format, but these
 bugs have been fixed on all practical hosts that we know of.
 
-Traditional Awk has a limit of at most 99 bytes in a number formatted by
-@code{OFMT}; for example, @code{OFMT="%.300e"; print 0.1;} will dump
-core.
-
 @item @command{basename}
 @c ---------------------
 @prindex @command{basename}