On 2020-06-02, Colin Caine wrote:
> Thanks for the link to that code, Gary. Unfortunately, it has very little
> ability to detect which asm syntax is being used:
>
> func dist#ft#FTasmsyntax()
> " see if file contains any asmsyntax=foo overrides. If so, change
> " b:asmsyntax appropriately
> let head = " ".getline(1)." ".getline(2)." ".getline(3)." ".getline(4).
> \" ".getline(5)." "
> let match = matchstr(head, '\sasmsyntax=\zs[a-zA-Z0-9]\+\ze\s')
> if match != ''
> let b:asmsyntax = match
> elseif ((head =~? '\.title') || (head =~? '\.ident') || (head =~?
> '\.macro') || (head =~? '\.subtitle') || (head =~? '\.library'))
> let b:asmsyntax = "vmasm"
> endif
> endfunc
>
> And the default is asm, which is the only one where we would not want these
> changes...
>
> If the default was instead unknown asm or something, then we could probably do
> something with that, but that sounds quite breaking. Another option would be
> to
> set the comments and commentstring values in ft.vim (where we know if we're
> selecting asm as the default or if we're sure), but I think in practice that
> would make very little difference to doing as I have done in this patch
> (because the default is selected basically every time).
There are a number of functions in ft.vim that deal with assembly
files. In addition to dist#ft#FTasmsyntax there are also
dist#ft#FTasm() and dist#ft#FTprogress_asm(). The last one looks
in the first ten lines for lines beginning with a semicolon.
I was thinking of something like the following for ftplugin/asm.vim.
if exists("b:did_ftplugin")
finish
endif
let b:did_ftplugin = 1
let b:undo_ftplugin = "setlocal comments< commentstring<"
setlocal comments+=:;
call cursor(1, 1)
if search('^\s*;', 'cn', 10)
setlocal commentstring=;%s
endif
That will always include ; in 'comments', which I didn't think would
hurt anything, but changes 'commentstring' only if a semicolon is
the first non-space character in any of the first ten lines of the
buffer.
Regards,
Gary
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