From 780e57d785e7b51f6045519d4565f0f831bc6a20 Mon Sep 17 00:00:00 2001
From: Bruce Miller <nebconinc@gmail.com>
Date: Tue, 8 Oct 2024 12:14:45 -0400
Subject: [PATCH] Simplify \lastskip,\lastkern (suggested by D.Ginev)

---
 lib/LaTeXML/Engine/TeX_Glue.pool.ltxml | 8 ++------
 lib/LaTeXML/Engine/TeX_Kern.pool.ltxml | 8 ++------
 2 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml b/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml
index 002e2940a..78120b1a6 100644
--- a/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml
+++ b/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml
@@ -137,12 +137,8 @@ DefPrimitiveI('\vfilneg', undef, undef);
 #----------------------------------------------------------------------
 # \lastskip         iq is 0.0 pt or the last glue or muglue on the current list.
 DefRegister('\lastskip' => Dimension(0), readonly => 1, getter => sub {
-    my $box;
-    for (my $i = $#LaTeXML::LIST ; $i > 0 ; $i--) {
-      my $box = $LaTeXML::LIST[$i];
-      last if !$box || !$box->getProperty('isSkip');
-      return $box->getProperty('width'); }
-    return Dimension(0); });
+    my $box = $LaTeXML::LIST[-1];
+    return ($box && $box->getProperty('isSkip') ? $box->getProperty('width') : Dimension(0)); });
 
 #%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 1;
diff --git a/lib/LaTeXML/Engine/TeX_Kern.pool.ltxml b/lib/LaTeXML/Engine/TeX_Kern.pool.ltxml
index 296f27811..ee308af1a 100644
--- a/lib/LaTeXML/Engine/TeX_Kern.pool.ltxml
+++ b/lib/LaTeXML/Engine/TeX_Kern.pool.ltxml
@@ -65,12 +65,8 @@ DefPrimitiveI('\unkern', undef, sub {
 
 # Get kern, if last on LIST
 DefRegister('\lastkern' => Dimension(0), readonly => 1, getter => sub {
-    my $box;
-    for (my $i = $#LaTeXML::LIST ; $i > 0 ; $i--) {
-      my $box = $LaTeXML::LIST[$i];
-      last if !$box || !$box->getProperty('isKern');
-      return $box->getProperty('width'); }
-    return Dimension(0); });
+    my $box = $LaTeXML::LIST[-1];
+    return ($box && $box->getProperty('isKern') ? $box->getProperty('width') : Dimension(0)); });
 
 #======================================================================
 # Moving Vertically