string function documentation

[Steve Gardner <scg@cise.npl.co.uk>]

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

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?


Thanks,

Steve

--
Steve Gardner               Centre for Information Systems Engineering
steve.gardner@npl.co.uk                   National Physical Laboratory
Tel: +44 20 8943 7060              Teddington, Middlesex, TW11 0LW, UK
Fax: +44 20 8977 7091                   http://www.npl.co.uk/npl/cise/

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