[latex3-commits] [l3svn] branch master updated: Chars ^^Y/^^Z need to be valid whilst reading some setup

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joseph pushed a commit to branch master
in repository l3svn.

The following commit(s) were added to refs/heads/master by this push:
       new  4e8d552   Chars ^^Y/^^Z need to be valid whilst reading some setup
4e8d552 is described below

commit 4e8d552e9f1ff9e46a9b84dcaffb006249d9fa87
Author: Joseph Wright <joseph.wright at morningstar2.co.uk>
Date:   Fri Nov 13 13:58:38 2015 +0000

    Chars ^^Y/^^Z need to be valid whilst reading some setup
---
 l3kernel/l3final.dtx |   22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/l3kernel/l3final.dtx b/l3kernel/l3final.dtx
index da48a20..ccd390f 100644
--- a/l3kernel/l3final.dtx
+++ b/l3kernel/l3final.dtx
@@ -259,6 +259,14 @@
 %    \begin{macrocode}
 \char_set_catcode_invalid:n { 127 }
 %    \end{macrocode}
+% For the $8$-bit engines dotless-I and dotless-J need to be valid,
+% and these therefore appear in some following code. To avoid an issue
+% when those lines are read, the chars are made valid here and that is
+% reversed for Unicode engines below.
+%    \begin{macrocode}
+\char_set_catcode_letter:n { `\^^Y }
+\char_set_catcode_letter:n { `\^^Z }
+%    \end{macrocode}
 %
 % For non-Unicode engine we now need to convert from UTF-$8$ to $8$-bit
 % for pattern reading and document use. The set up here is copied from
@@ -268,17 +276,23 @@
 % (The primitives have to be available at point of use not just at point of
 % definition so a compatibility layer is hard to arrange here.)
 %    \begin{macrocode}
-\bool_if:nF
+\bool_if:nTF
   {
        \sys_if_engine_luatex_p:
     || \sys_if_engine_xetex_p:
   }
+%    \end{macrocode}
+% Unicode engines: make these two invalid (this happens after \TeX{}
+% has read and thrown away their use in the following).
+%    \begin{macrocode}
   {
+    \char_set_catcode_invalid:n { `\^^Y }
+    \char_set_catcode_invalid:n { `\^^Z }
+  }
 %    \end{macrocode}
-% For the $8$-bit engines dotless-I and dotless-J need to be valid.
+% Now for $8$-bit engines.
 %    \begin{macrocode}
-    \char_set_catcode_letter:n { `\^^Y }
-    \char_set_catcode_letter:n { `\^^Z }
+  {
 %    \end{macrocode}
 % At least for the present, make \upTeX{} behave like \pdfTeX{} so
 % the set up is easier.

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