[latex3-commits] [git/LaTeX3-latex3-latex2e] nfssalias: provide alias size function (mainly for autinst type of .fd files (0cfb60e1)

[Frank Mittelbach]

Repository : https://github.com/latex3/latex2e
On branch  : nfssalias
Link       : https://github.com/latex3/latex2e/commit/0cfb60e1e349e72932daff7f077be9b71fbd95e3

>---------------------------------------------------------------

commit 0cfb60e1e349e72932daff7f077be9b71fbd95e3
Author: Frank Mittelbach <frank.mittelbach at latex-project.org>
Date:   Fri Oct 11 12:41:09 2019 +0200

    provide alias size function (mainly for autinst type of .fd files


>---------------------------------------------------------------

0cfb60e1e349e72932daff7f077be9b71fbd95e3
 base/changes.txt      |  5 +++++
 base/doc/ltnews31.tex |  3 +++
 base/latexrelease.ins |  2 +-
 base/ltfsstrc.dtx     | 40 +++++++++++++++++++++++++++++++++++++---
 4 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/base/changes.txt b/base/changes.txt
index edeba129..61e93e4e 100644
--- a/base/changes.txt
+++ b/base/changes.txt
@@ -4,6 +4,11 @@ completeness or accuracy and it contains some references to files that
 are not part of the distribution.
 =======================================================================
 
+2019-10-11  Frank Mittelbach  <Frank.Mittelbach at latex-project.org>
+
+	* ltfsstrc.dtx (subsection{Sizefunctions}):
+	Added 'alias' size function (mainly for autoinst fonts)
+
 2019-10-07  Frank Mittelbach  <Frank.Mittelbach at latex-project.org>
 
 	* lttab.dtx (subsection{array and tabular environments}):
diff --git a/base/doc/ltnews31.tex b/base/doc/ltnews31.tex
index 2a8eeb18..636afe2f 100644
--- a/base/doc/ltnews31.tex
+++ b/base/doc/ltnews31.tex
@@ -150,6 +150,9 @@ This document is under construction \ldots
 
 \section{Other changes to the \LaTeX{} kernel}
 
+\emph{added \texttt{alias} size function}
+
+
 
         
 \section{Changes to packages in the \pkg{tools} category}
diff --git a/base/latexrelease.ins b/base/latexrelease.ins
index 9358692a..9278e254 100644
--- a/base/latexrelease.ins
+++ b/base/latexrelease.ins
@@ -116,7 +116,7 @@ extension .ins) which are part of the distribution.
   \from{fontdef.dtx}     {latexrelease}% (covering fontmath and fonttext)
   \from{ltfntcmd.dtx}    {latexrelease}% empty
   \from{ltfssbas.dtx}    {latexrelease}%
-  \from{ltfsstrc.dtx}    {latexrelease}% empty
+  \from{ltfsstrc.dtx}    {latexrelease}%
   \from{ltfsscmp.dtx}    {latexrelease}%
   \from{ltpageno.dtx}    {latexrelease}% empty
   \from{ltxref.dtx}      {latexrelease}% empty
diff --git a/base/ltfsstrc.dtx b/base/ltfsstrc.dtx
index 05dafa20..376faa70 100644
--- a/base/ltfsstrc.dtx
+++ b/base/ltfsstrc.dtx
@@ -34,10 +34,10 @@
 %
 %<package>\NeedsTeXFormat{LaTeX2e}[1995/05/16]
 %<package>\ProvidesPackage{tracefnt}
-%<package>     [2015/02/21 v3.0k  Standard LaTeX package (font tracing)]
+%<package>     [2019/10/11 v3.0l  Standard LaTeX package (font tracing)]
 % \fi
 % \ProvidesFile{ltfsstrc.dtx}
-%              [2015/02/21 v3.0k LaTeX Kernel (NFSS tracing)]
+%              [2019/10/11 v3.0l LaTeX Kernel (NFSS tracing)]
 %
 % \iffalse
 %<+checkmem>\CHECKMEM
@@ -1731,7 +1731,7 @@
 %    the optional argument (if present) is ignored. The font encoding
 %    scheme cannot be changed. Therefore, the first thing we do is to
 %    prepend the encoding scheme.
-% \changes{v2.0b}{1992/07/26}{}
+%        {documentation fixes}
 %    \begin{macrocode}
 \DeclareSizeFunction{sub}{\sub at sfcnt\@font at warning}
 \DeclareSizeFunction{ssub}{\sub at sfcnt\@font at info}
@@ -1787,6 +1787,40 @@
 %    \end{macrocode}
 %  \end{macro}
 %
+%  \begin{macro}{\@font at aliasinfo}
+% \changes{v3.0l}{2019/10/11}{Added 'alias' size function}
+%    Sometimes a substitution is only done to map a long font name to
+%    a standard shape or series, e.g.,
+%\begin{verbatim}
+%\DeclareFontShape{T1}{Roboto-LF}{b}{it}{<-> alias * Roboto-LF/bold/it}{}
+%\end{verbatim}
+%    Using the \texttt{ssub} function in that case will give a strange
+%    (and incorrect) warning. As an alternative we therefore offer the
+%    size function \texttt{alias}. It will still add some info into
+%    the \texttt{.log} file, but no longer complains that the font
+%    shape is not available. It is implemented by grabbing the default
+%    warning text and replacing it with a new one.
+%    \begin{macrocode}
+%</2ekernel>
+%<*2ekernel|latexrelease>
+%<latexrelease>\IncludeInRelease{2020/02/01}%
+%<latexrelease>                 {\@font at aliasinfo}{alias size function}%
+\DeclareSizeFunction{alias}{\sub at sfcnt\@font at aliasinfo}
+\def\@font at aliasinfo#1{%
+  \@font at info{Font\space shape\space `\curr at fontshape'\space
+              aliased\space to\MessageBreak `\mandatory at arg'}%
+}
+%</2ekernel|latexrelease>
+%<latexrelease>\EndIncludeInRelease
+%<latexrelease>\IncludeInRelease{0000/00/00}%
+%<latexrelease>                 {\@font at aliasinfo}{alias size function}%
+%<latexrelease>\let\s at fct@alias\@undefined
+%<latexrelease>\let\@font at aliasinfo\@undefined
+%<latexrelease>
+%<latexrelease>\EndIncludeInRelease
+%<*2ekernel>
+%    \end{macrocode}
+%  \end{macro}
 %
 %  \begin{macro}{\s at fct@subf}
 %    The |subf| size function allows substitution of another font. The