comments: Mark prematurely-terminated command as an error.

This is already done for commands prematurely terminated by ";".

Author: danielshahaf

highlighters/main/main-highlighter.zsh

@@ -190,8 +190,11 @@ _zsh_highlight_main_highlighter()
     fi
 
     if [[ ${interactive_comments+'set'} && $arg[1] == $histchars[3] ]]; then
-      # TODO: check $this_word
-      style=$ZSH_HIGHLIGHT_STYLES[comment]
+      if [[ $this_word == *(':regular:'|':start:')* ]]; then
+        style=$ZSH_HIGHLIGHT_STYLES[comment]
+      else
+        style=$ZSH_HIGHLIGHT_STYLES[unknown-token] # prematurely terminated
+      fi
       _zsh_highlight_main_add_region_highlight $start_pos $end_pos $style
       already_added=1
       continue

highlighters/main/test-data/sudo-comment.zsh

@@ -0,0 +1,38 @@
+# -------------------------------------------------------------------------------------------------
+# Copyright (c) 2015 zsh-syntax-highlighting contributors
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are permitted
+# provided that the following conditions are met:
+#
+#  * Redistributions of source code must retain the above copyright notice, this list of conditions
+#    and the following disclaimer.
+#  * Redistributions in binary form must reproduce the above copyright notice, this list of
+#    conditions and the following disclaimer in the documentation and/or other materials provided
+#    with the distribution.
+#  * Neither the name of the zsh-syntax-highlighting contributors nor the names of its contributors
+#    may be used to endorse or promote products derived from this software without specific prior
+#    written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+# IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -------------------------------------------------------------------------------------------------
+# -*- mode: zsh; sh-indentation: 2; indent-tabs-mode: nil; sh-basic-offset: 2; -*-
+# vim: ft=zsh sw=2 ts=2 et
+# -------------------------------------------------------------------------------------------------
+
+ZSH_HIGHLIGHT_STYLES[single-hyphen-option]=$unused_highlight
+setopt interactive_comments
+BUFFER='sudo -u # comment'
+
+expected_region_highlight=(
+  "1 4 $ZSH_HIGHLIGHT_STYLES[precommand]" # sudo
+  "6 7 $ZSH_HIGHLIGHT_STYLES[single-hyphen-option]" # -u
+  "9 17 $ZSH_HIGHLIGHT_STYLES[unknown-token]" # "# comment" - error because argument missed
+)