introduce util file

autoload/airline/util.vim

@@ -0,0 +1,18 @@
+" MIT license. Copyright (c) 2013 Bailey Ling.
+" vim: ts=2 sts=2 sw=2 fdm=indent
+
+function! airline#util#exec_funcrefs(list, break_early)
+  " for 7.2; we cannot iterate list, hence why we use range()
+  " for 7.3-[97, 328]; we cannot reuse the variable, hence the {}
+  for i in range(0, len(a:list) - 1)
+    let Fn{i} = a:list[i]
+    if a:break_early
+      if Fn{i}()
+        return 1
+      endif
+    else
+      call Fn{i}()
+    endif
+  endfor
+  return 0
+endfunction