From f56e3fad23e8f20bf278b69120dffb0a850a3214 Mon Sep 17 00:00:00 2001
From: Daniel Shahaf <danielsh@apache.org>
Date: Mon, 16 Mar 2020 20:45:56 +0000
Subject: [PATCH] 'main': Optimize the path_prefix check.

Computing ${#array} is O(N), whereas checking 0 is O(1).
---
 highlighters/main/main-highlighter.zsh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/highlighters/main/main-highlighter.zsh b/highlighters/main/main-highlighter.zsh
index dd3af08..fcc0c96 100644
--- a/highlighters/main/main-highlighter.zsh
+++ b/highlighters/main/main-highlighter.zsh
@@ -1117,9 +1117,10 @@ _zsh_highlight_main_highlighter_check_path()
   # If this word ends the buffer, check if it's the prefix of a valid path.
   if (( has_end && (len == end_pos) )) &&
      [[ $WIDGET != zle-line-finish ]]; then
+    # TODO: When we've dropped support for pre-5.0.6 zsh, use the *(Y1) glob qualifier here.
     local -a tmp
     tmp=( ${expanded_path}*(N) )
-    (( $#tmp > 0 )) && REPLY=path_prefix && return 0
+    (( ${+tmp[1]} )) && REPLY=path_prefix && return 0
   fi
 
   # It's not a path.