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Refactor the "s:LoadArgCount()" function (#3025)

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* Refactor the "s:LoadArgCount()" function

Previously, this function would always set "v:errmsg" on the first
call with a given function.  This is because autoloaded functions
are not defined on the first call.

A number of improvements have been made:
 - a useless local function ("l:Function") is removed
 - the "execute()" builtin captures the output, instead of ":redir"
 - a ":try" block handles the case where a function is not defined
 - a useless ":if" is removed since ":redir" always defines the var
 - confusing quoting is re-written (remove double "'" chars)

Fixes: #3021
This commit is contained in:
w0rp
2020-03-04 20:56:22 +00:00
committed by GitHub
parent 634c81fd46
commit 8f7ccdc5e9
1 changed files with 4 additions and 8 deletions
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12
autoload/ale/util.vim
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@@ -336,15 +336,11 @@ function! ale#util#GetMatches(lines, patterns) abort
endfunction endfunction
function! s:LoadArgCount(function) abort function! s:LoadArgCount(function) abort
let l:Function = a:function try
let l:output = execute('function a:function')
redir => l:output catch /E123/
silent! function Function
redir END
if !exists('l:output')
return 0 return 0
endif endtry
let l:match = matchstr(split(l:output, "\n")[0], '\v\([^)]+\)')[1:-2] let l:match = matchstr(split(l:output, "\n")[0], '\v\([^)]+\)')[1:-2]
let l:arg_list = filter(split(l:match, ', '), 'v:val isnot# ''...''') let l:arg_list = filter(split(l:match, ', '), 'v:val isnot# ''...''')