\catcode‘\\=xystycatcode

% That is all unless this is called as a LaTeX2e ‘native mode’ package. Is % there an official way to check this? Anyway, this seems to work: \makeatletter \ifx\if@compatibility\undefined \catcode‘\\=xystycatcode\endinput \fi \if@compatibility \catcode‘\\=xystycatcode\endinput \fi \catcode‘\\=xystycatcode

% Ensure that we are *really* running LaTeX2e... \NeedsTeXFormat{LaTeX2e

% This file provides XY-pic! \edef\next{% \noexpand\ProvidesPackage{xy[\xydate\space XY-pic version \xyversion]\next

% Recognise standard LaTeX2e PostScript options (cf. ‘LaTeX Companion’ p.317):

% PS drivers: \DeclareOption{dvips{\xyoption{ps\AtBeginDocument{\UsePSspecials{dvips \DeclareOption{dvitops{\xyoption{ps\AtBeginDocument{\UsePSspecials{dvitops \DeclareOption{oztex{\xyoption{ps\AtBeginDocument{\UsePSspecials{OzTeX \DeclareOption{textures{\xyoption{ps% \AtBeginDocument{\UsePSspecials{Textures

% \usepackage options translate to XY-pic options:

% A few options should be activated in addition to loaded: \DeclareOption{cmtip{\xyoption{cmtip\AtBeginDocument{\UseComputerModernTips

% Other options are just loaded. \DeclareOption*{\edef\next{\noexpand\xyoption{\CurrentOption\next

% Process the options! \ProcessOptions

% ...and that is all. \endinput

% $Log: xy.sty,v $ % Revision 2.12 1994/10/25 11:34:25 kris % Interim release just before v3 [works with AMS-LaTeX 1.2]... % % Revision 2.9 1994/06/09 14:59:19 kris % Release 3beta. % % Revision 2.8 1994/04/08 04:30:00 kris % Second (bug fix) 3alpha release. % % Revision 2.7 1994/03/08 02:06:01 kris % Release 3alpha. % % New for version 2.7.

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