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" Author: w0rp <devw0rp@gmail.com>
" Description: This module implements a function for parsing arguments for
" commands.
" Given a list of valid arguments like ['foo', 'bar'] and a string to parse,
" parse the arguments from the string and return [parsed_args, remainder].
"
" Arguments must be prefixed in the string with a single minus (-), and a
" double minus (--) denotes the end of arguments.
function! ale#args#Parse(arg_list, string) abort
let l:parsed = {}
let l:end_of_args = 0
let l:word_list = split(a:string, ' ')
let l:index = 0
while l:index < len(l:word_list)
let l:word = l:word_list[l:index]
if l:word[:0] is# '-'
let l:index += 1
if l:word is# '--'
break
endif
let l:arg = l:word[1:]
if index(a:arg_list, l:arg) >= 0
let l:parsed[l:arg] = ''
else
throw 'Invalid argument: ' . l:word
endif
elseif l:word is# ''
let l:index += 1
else
break
endif
endwhile
let l:new_string = join(l:word_list[l:index :], ' ')
return [l:parsed, l:new_string]
endfunction
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