Am 09.04.2011 13:29, schrieb ZyX:
Reply to message «Re: Wish:<range>»,
sent 15:22:29 09 April 2011, Saturday
by Tony Mechelynck:
Could you give a use case which would not work just as well with either
-range or -range=% ? You'd have to use that range somewhere.
Maybe you could use :0command for your special case? That range is
allowed, but for some commands it is not meaningful.
If I understood him correctly, he wants to write `<range>' where now you write
`<line1>,<line2>', like this:
command -range Foo<range>call s:Foo()
instead of
command -range Foo<line1>,<line2>call s:Foo()
.
Yep, that's what I meant.
For example, I have a command :InFunc . It's quite a trivial command,
it takes an argument Ex-command and executes it within a function.
Purpose is to automatically restore the highlighting state and the last
search pattern.
:h function-search-undo
Thus, mostly the Ex-command will be :global or :substitute .
Problem: :global has the default range "1,$" whereas :substitute has the
default range ".". For :InFunc, I'm urged to specify a default range
(e.g. either -range (current line) or -range=% (whole buffer)). I don't
want that, instead I want the default range of the argument command to
be in effect. But at the moment, it's not possible to check for an
empty range.
" What I use now:
:[range]InFunc {cmd} " execute :[range]{cmd}, for :subst
:[range]InFunc! {cmd} " execute :{cmd}, for :global
com! -bang -range -nargs=+ InFunc <line1>,<line2>call InFunc(<bang>0, <q-args>)
func! InFunc(bang, cmd) range
if a:bang
exec a:cmd
else
exec a:firstline.",".a:lastline. a:cmd
endif
endfunc
" I'd like to write the above this way:
com! -range=NoDefault -nargs=+ InFunc <range>call InFunc(<q-args>)
func! InFunc(cmd) range
exec a:range. a:cmd
endfunc
Oops, we would also need a new variable a:range !
Maybe, actually, <range> and a:range are not needed, I just want to be
able to check for an empty range:
com! -range -nargs=+ InFunc <line1>,<line2>call InFunc(<q-args>)
func! InFunc(cmd) range
if range_is_empty()
exec a:cmd
else
exec a:firstline.",".a:lastline. a:cmd
endif
endfunc
This would just a require a new function range_is_empty().
--
Andy
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