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string-for-each, string-iter

This page is part of the web mail archives of SRFI 13 from before July 7th, 2015. The new archives for SRFI 13 contain all messages, not just those from before July 7th, 2015.

I noticed the procedure pair string-for-each and string-iter [*]. My
suggestion is that string-iter is dropped and that string-for-each is 
made do iterate from START to END. This is consistent with the list
version of for-each, which is guaranteed to apply PROC in
order. If a procedure can be applied in any order, it can't be a
restriction to apply it in order, thus an unordered version of
string-for-each is unnecessary. 

Are there efficiency/implementation advantages to have an unordered
version? In that case, another name than string-for-each seems

	Best regards,

[*] From SRFI-13:

string-for-each  proc s [start end] -> unspecified
string-iter      proc s [start end] -> unspecified
    Apply PROC to each character in S.
    STRING-FOR-EACH has no specified iteration order.
    STRING-ITER is required to iterate from START to END
    in increasing order. 

Lars Arvestad               Dept. of Numerical Analysis and Computing Science
                       Royal Institute of Technology (KTH), Stockholm, Sweden