Re: alternation option end of string

On 2026-05-02 21:33, Alexis wrote:
>
>
> There are different flavours of regex - POSIX BREs, POSIX EREs, PCREs, 
> etc. - but i can't recall encountering a flavour where `$` doesn't 
> have the semantics described by Bart. (i'd be interested to know if 
> there is one.)
It might not actually be the '$' just some mechanism for matching a 
string that must end after some substring.  Of course the ${ % } method 
does just that, but if the test is from the beginning of the string it's 
more involved.  But Roman's method is so satisfactory that maybe it's a 
thin point.  It would seem to require some new special char that it 
seems we don't have and that would bloat the syntax space.  Besides, 
Roman's method is more self-explaining anyway.