Highlight subshells and anonymous functions correctly.

Fixes #166.
Fixes #194.
Builds upon the issue #207 work.

Author: danielshahaf

highlighters/main/main-highlighter.zsh

@@ -101,6 +101,9 @@ _zsh_highlight_main_highlighter()
   # Tokens that, at (naively-determined) "command position", are followed by
   # a de jure command position.  All of these are reserved words.
   ZSH_HIGHLIGHT_TOKENS_CONTROL_FLOW=(
+    $'\x7b' # block
+    $'\x28' # subshell
+    '()' # anonymous function
     'while'
     'until'
     'if'
@@ -247,6 +250,9 @@ _zsh_highlight_main_highlighter()
                           style=$ZSH_HIGHLIGHT_STYLES[reserved-word]
                           _zsh_highlight_main_add_region_highlight $start_pos $((start_pos + 2)) $style
                           already_added=1
+                        elif [[ $arg == '()' ]]; then
+                          # anonymous function
+                          style=$ZSH_HIGHLIGHT_STYLES[reserved-word]
                         else
                           if _zsh_highlight_main_highlighter_check_path; then
                             style=$ZSH_HIGHLIGHT_STYLES[path]

highlighters/main/test-data/anonymous-function.zsh

@@ -30,11 +30,11 @@
 BUFFER='() echo hello; () { echo world }'
 
 expected_region_highlight=(
-  "1 2 $ZSH_HIGHLIGHT_STYLES[reserved-word] 'issue #194'" # () 
-  "4 7 $ZSH_HIGHLIGHT_STYLES[command] 'issue #194'" # echo
+  "1 2 $ZSH_HIGHLIGHT_STYLES[reserved-word]" # () 
+  "4 7 $ZSH_HIGHLIGHT_STYLES[command]" # echo
   "9 13 $ZSH_HIGHLIGHT_STYLES[default]" # hello
   "14 14 $ZSH_HIGHLIGHT_STYLES[commandseparator]" # ;
-  "16 17 $ZSH_HIGHLIGHT_STYLES[reserved-word] 'issue #194'" # ()
-  "19 19 $ZSH_HIGHLIGHT_STYLES[reserved-word] 'issue #194'" # {
-  "21 24 $ZSH_HIGHLIGHT_STYLES[command] 'issue #194'" # echo
+  "16 17 $ZSH_HIGHLIGHT_STYLES[reserved-word]" # ()
+  "19 19 $ZSH_HIGHLIGHT_STYLES[reserved-word]" # {
+  "21 24 $ZSH_HIGHLIGHT_STYLES[command]" # echo
 )

highlighters/main/test-data/subshell.zsh

@@ -31,6 +31,6 @@ BUFFER='tar cf - * | (cd /target; tar xfp -)'
 
 expected_region_highlight=(
   "1 3 $ZSH_HIGHLIGHT_STYLES[command]" # tar
-  "15 16 $ZSH_HIGHLIGHT_STYLES[command] 'issue #166'" # cd
+  "15 16 $ZSH_HIGHLIGHT_STYLES[command]" # cd
   "27 29 $ZSH_HIGHLIGHT_STYLES[command]" # tar
 )