Add a function for getting matches, and use it to simplify a lot of code

ale_linters/d/dmd.vim

@@ -56,24 +56,12 @@ function! ale_linters#d#dmd#Handle(buffer, lines) abort
     let l:pattern = '^[^(]\+(\([0-9]\+\)\,\?\([0-9]*\)): \([^:]\+\): \(.\+\)'
     let l:output = []
 
-    for l:line in a:lines
-        let l:match = matchlist(l:line, l:pattern)
-
-        if len(l:match) == 0
-            break
-        endif
-
-        let l:line = l:match[1] + 0
-        let l:column = l:match[2] + 0
-        let l:type = l:match[3]
-        let l:text = l:match[4]
-
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
         call add(l:output, {
-        \   'bufnr': bufnr('%'),
-        \   'lnum': l:line,
-        \   'col': l:column,
-        \   'text': l:text,
-        \   'type': l:type ==# 'Warning' ? 'W' : 'E',
+        \   'lnum': l:match[1],
+        \   'col': l:match[2],
+        \   'type': l:match[3] ==# 'Warning' ? 'W' : 'E',
+        \   'text': l:match[4],
         \})
     endfor