-a would be a nice addition, but I'd also like a /filter switch similar to -t, in the way that it would work with tokens. A -h N[-[M]] S switch would dump to the outfile only the N to M tokens (separated by character S). For example, if the infile contains this:
one-two-three-four
1-2-3-4
hehe-haha-hihi-hoho
this command: /filter -h 2-3 45 <infile> <outfile> *
would dump to the outfile this:
two-three
2-3
haha-hihi
I could fine many uses for this switch. Fex, it would be superfast to grab parts of data from an MDX ListView but also any other 'columned list' made in mirc, be it files or custom windows.
A switch for /filter, equivalent to the -a switch you suggested for /loadbuf, could do this as well, but it would be significantly slower, because mirc would have to apply the alias you specified to each line (it's like sorting a file with /filter's -a instead of -t; -a is terribly slower). Personally, I'd like to have both.