Say I have a function that takes multiple arguments, how would I pass them as a single string argument to another function?

function test(...)
    " vimgrep is just an example
    vimgrep a:000 /some/path/**/*.txt

When bound to a key, eg

command! -nargs=+ FIND call SimpleGrep(<args>)
nnoremap <M-f> :FIND<SPACE>

I get the error that the input is an unknown variable, using string(a:000) doesn't fix things.

How would a:000 be converted into a string so FIND a b c could be evaluated as if FIND "a b c" had been written?


Join the arguments together with join().

function test(...)
    " vimgrep is just an example
    execute 'vimgrep /'.join(a:000).'/ /some/path/**/*.txt'
command! -nargs=+ FIND call SimpleGrep(<f-args>)
nnoremap <M-f> :FIND<SPACE>

Note: join() will join together with a single space and <f-args> will ignore extra spaces, so :FIND a b c is equivalent to :FIND a b c

For more help see:

:h join()
:h <f-args>
:h a:000
| improve this answer | |
  • Not sure escaping is correct here, needed to do execute 'vimgrep '.join(a:000) l:root (l:root is the variable for the root dir). – ideasman42 Sep 26 '16 at 22:47
  • In this case, the space stripping is a bit of a problem, possibly better to manually quote the string then. Even so, handy to know how to join varargs. – ideasman42 Sep 26 '16 at 22:49

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