fix parse :syntax with <bar>

Author: haya14busa

autoload/vimlparser.vim

@@ -896,6 +896,8 @@ function! s:VimLParser._parse_command(parser) abort
     call self.parse_cmd_while()
   elseif a:parser == 'parse_wincmd'
     call self.parse_wincmd()
+  elseif a:parser == 'parse_cmd_syntax'
+    call self.parse_cmd_syntax()
   endif
 endfunction
 
@@ -1935,6 +1937,16 @@ function! s:VimLParser.parse_wincmd()
   call self.add_node(node)
 endfunction
 
+" FIXME: validate argument
+function! s:VimLParser.parse_cmd_syntax()
+  let end = self.separate_nextcmd()
+  let node = s:Node(s:NODE_EXCMD)
+  let node.pos = self.ea.cmdpos
+  let node.ea = self.ea
+  let node.str = self.reader.getstr(self.ea.linepos, end)
+  call self.add_node(node)
+endfunction
+
 let s:VimLParser.neovim_additional_commands = [
       \ {'name': 'tnoremap', 'minlen': 8, 'flags': 'EXTRA|TRLBAR|NOTRLCOM|USECTRLV|CMDWIN', 'parser': 'parse_cmd_common'}]
 
@@ -2364,7 +2376,7 @@ let s:VimLParser.builtin_commands = [
       \ {'name': 'suspend', 'minlen': 3, 'flags': 'TRLBAR|BANG|CMDWIN', 'parser': 'parse_cmd_common'},
       \ {'name': 'sview', 'minlen': 2, 'flags': 'BANG|FILE1|RANGE|NOTADR|EDITCMD|ARGOPT|TRLBAR', 'parser': 'parse_cmd_common'},
       \ {'name': 'swapname', 'minlen': 2, 'flags': 'TRLBAR|CMDWIN', 'parser': 'parse_cmd_common'},
-      \ {'name': 'syntax', 'minlen': 2, 'flags': 'EXTRA|NOTRLCOM|CMDWIN', 'parser': 'parse_cmd_common'},
+      \ {'name': 'syntax', 'minlen': 2, 'flags': 'EXTRA|NOTRLCOM|CMDWIN', 'parser': 'parse_cmd_syntax'},
       \ {'name': 'syntime', 'minlen': 5, 'flags': 'NEEDARG|WORD1|TRLBAR|CMDWIN', 'parser': 'parse_cmd_common'},
       \ {'name': 'syncbind', 'minlen': 4, 'flags': 'TRLBAR', 'parser': 'parse_cmd_common'},
       \ {'name': 't', 'minlen': 1, 'flags': 'RANGE|WHOLEFOLD|EXTRA|TRLBAR|CMDWIN|MODIFY', 'parser': 'parse_cmd_common'},

test/test_syncmd.ok

@@ -0,0 +1,5 @@
+(if 1
+  (excmd "syntax on "))
+(excmd "syntax")
+(excmd "syntax enable")
+(excmd "syntax list GroupName")

test/test_syncmd.vim

@@ -0,0 +1,4 @@
+if 1 | syntax on | endif
+syntax
+syntax enable
+syntax list GroupName