From dc74601612e94f7d50d0970fc5a1b79b40a7b223 Mon Sep 17 00:00:00 2001
From: Karl Berry <karl@freefriends.org>
Date: Fri, 18 Aug 2006 23:44:31 +0000
Subject: extpfeil update (28jul06)

git-svn-id: svn://tug.org/texlive/trunk@1985 c570f23f-e606-0410-a88d-b1316a301751
---
 Master/texmf-dist/tex/latex/extpfeil/extpfeil.sty | 31 ++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

(limited to 'Master/texmf-dist/tex/latex')

diff --git a/Master/texmf-dist/tex/latex/extpfeil/extpfeil.sty b/Master/texmf-dist/tex/latex/extpfeil/extpfeil.sty
index 8a450d51403..109e3ec8bcc 100644
--- a/Master/texmf-dist/tex/latex/extpfeil/extpfeil.sty
+++ b/Master/texmf-dist/tex/latex/extpfeil/extpfeil.sty
@@ -34,12 +34,32 @@
 %%
 \NeedsTeXFormat{LaTeX2e}[2003/12/01]
 \ProvidesPackage{extpfeil}
- [2006/03/23 v0.2a Extensible Pfeile (PE)]
+ [2006/07/27 v0.3 Extensible Pfeile (PE)]
 \RequirePackage{amsmath}
 \RequirePackage{amssymb}
+\RequirePackage{mathtools}
+\RequirePackage[only,shortleftarrow,shortrightarrow]{stmaryrd}
 \newcommand*{\newextarrow}[3] {%
    \newcommand*{#1}[2][]{\ext@arrow #2{\arrowfill@#3}{##1}{##2}}
 }
+\newcommand*{\twoarrowsleft}[2]{%
+   \settoheight{\dimen@}{=}%
+   \advance\dimen@ by 1pt\relax
+   \mathrel{%
+      \mathrlap{\raisebox{0.22\dimen@}[0pt][0pt]{$#1$}}%
+      \mathrlap{\raisebox{-0.22\dimen@}[0pt][0pt]{$#2$}}%
+      \hphantom{\vbox{\hbox{$#1$}\hbox{$#2$}}}%
+   }%
+}%
+\newcommand*{\twoarrowsright}[2]{%
+   \settoheight{\dimen@}{=}%
+   \advance\dimen@ by 1pt\relax
+   \mathrel{%
+      \hphantom{\vbox{\hbox{$#1$}\hbox{$#2$}}}%
+      \mathllap{\raisebox{0.22\dimen@}[0pt][0pt]{$#1$}}%
+      \mathllap{\raisebox{-0.22\dimen@}[0pt][0pt]{$#2$}}%
+   }%
+}%
 \newextarrow{\xtwoheadrightarrow}
        {05{40}0}
        {\relbar\relbar\twoheadrightarrow}
@@ -49,6 +69,15 @@
 \let\xmapsto\undefined
 \newextarrow{\xmapsto}{0599}{{\mapstochar\relbar}\relbar\rightarrow}
 \newextarrow{\xlongequal}{5599}{\Relbar\Relbar\Relbar}
+\newextarrow
+  {\xtofrom}%
+  {55{40}0}%
+  {%
+    {\twoarrowsleft\relbar\shortleftarrow}%
+    \Relbar%
+    {\twoarrowsright\shortrightarrow\relbar}%
+  }%
+
 \endinput
 %%
 %% End of file `extpfeil.sty'.
-- 
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