string function documentation

From: Steve Gardner (
Date: Wed Sep 15 1999 - 13:10:23 MET DST

Date: Wed, 15 Sep 1999 12:10:23 +0100 (BST)
From: Steve Gardner <>
Message-Id: <>
Subject: string function documentation

The following behaviour is clearly correct, but I think it is

Various functions in the String and Str modules accept
"String.length s" as a valid character index for "s". For example,

  Str.string_match regexp s (String.length s)

does not raise an Invalid_argument exception, but returns true or
false depending on whether regexp allows an empty string.

As mentioned above, I see that this is correct.

Should the documentation should be changed to mention this behaviour?



Steve Gardner               Centre for Information Systems Engineering                   National Physical Laboratory
Tel: +44 20 8943 7060              Teddington, Middlesex, TW11 0LW, UK
Fax: +44 20 8977 7091         

"The contents of the above message are my views alone and should not be taken as representing the views held by NPL Management Ltd."

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