throw error with unknown parser command

Author: haya14busa

autoload/vimlparser.vim

@@ -893,6 +893,8 @@ function! s:VimLParser._parse_command(parser) abort
     call self.parse_wincmd()
   elseif a:parser == 'parse_cmd_syntax'
     call self.parse_cmd_syntax()
+  else
+    throw printf('unknown parser: %s', string(a:parser))
   endif
 endfunction
 

js/vimlparser.js

@@ -1161,6 +1161,9 @@ VimLParser.prototype._parse_command = function(parser) {
     else if (parser == "parse_cmd_syntax") {
         this.parse_cmd_syntax();
     }
+    else {
+        throw viml_printf("unknown parser: %s", viml_string(parser));
+    }
 }
 
 VimLParser.prototype.find_command = function() {

py/vimlparser.py

@@ -937,6 +937,8 @@ def _parse_command(self, parser):
             self.parse_wincmd()
         elif parser == "parse_cmd_syntax":
             self.parse_cmd_syntax()
+        else:
+            raise VimLParserException(viml_printf("unknown parser: %s", viml_string(parser)))
 
     def find_command(self):
         c = self.reader.peekn(1)