[erlang-questions] string:substr/2 gives confusing error message
Fri Dec 5 12:32:30 CET 2008
I think that depends how you want to look at it...
One may argue that
string:substr(, 2 )
does not make much sense as a statement, but then, I'd say that:
string:substr("1", 2 )
does not make to much sense either, and yet it returns .
IMO, both functions should behave the same way, and to be pragmatic, return
an empty list (not a badarg exception).
[mailto:] On Behalf Of Vlad Dumitrescu
Sent: 05 December 2008 12:12 PM
Subject: [erlang-questions] string:substr/2 gives confusing error message
Calling string:substr/2 with erroneous arguments gives a
non-informative error message
()1> string:substr(, 2).
** exception error: no function clause matching string:substr2(,2)
Shouldn't it be badarg instead, or something similar?
Also, the strings module documentation doesn't mention what are the
cases when the function will fail. (A quick glance shows that there
are other functions in the same situation).
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