Try making \code and \samp robust and consistent re no ligatures.

git-svn-id: https://svn.r-project.org/R/trunk@58096 00db46b3-68df-0310-9c12-caf00c1e9a41

share/texmf/tex/latex/Rd.sty

@@ -206,23 +206,37 @@
 \newcommand{\email}[1]{\normalfont\texttt{\textless#1\textgreater}}
 
 %% \code without `-' ligatures
-{\catcode`\-=\active%
-  \global\def\code{\bgroup%
-    \catcode`\-=\active \let-\codedash%
-    \Rd@code}}
-\def\codedash{-\discretionary{}{}{}}
-\def\Rd@code#1{\normalfont\texttt{#1}\egroup}
 
-\def\AsIs{\bgroup\let\do\@makeother\Rd@AsIs@dospecials\@noligs\@vobeyspaces\Rd@AsIsX}
-\def\Rd@AsIs@dospecials{\do\$\do\&\do\#\do\^\do\_\do\%\do\~}
-\def\Rd@AsIsX#1{\normalfont #1\egroup}
+%{\catcode`\-=\active%
+%   \global\def\code{\bgroup%
+%     \catcode`\-=\active \let-\codedash%
+%     \Rd@code}}
+%     \def\codedash{-\discretionary{}{}{}}
+
+%% If we simply do
+%%   \DeclareRobustCommand\code{\bgroup\@noligs\@vobeyspaces\Rd@code}
+%% then e.g.
+%%   \code{\LinkA{attr<-}{attr<.Rdash.}} 
+%% will give an undefined control sequence `\< error when hyperref is
+%% used (so that \LinkA uses \hyperlink).
+%% Hence, use a noligs list without < and > for now, and use the same
+%% list for \code and \samp and their variants.
+\def\Rd@nolig@list{\do\`\do\,\do\'\do\-}
+\def\Rd@noligs{\let\do\do@noligs \Rd@nolig@list}
+
+\DeclareRobustCommand\code{\bgroup\Rd@noligs\@vobeyspaces\Rd@code}
+\def\Rd@code#1{\normalfont\texttt{#1}\egroup}
 \let\command=\code
 \let\env=\code
 
-\newcommand\samp{`\bgroup\@noligs\@vobeyspaces\@sampx}
+\DeclareRobustCommand\samp{`\bgroup\Rd@noligs\@vobeyspaces\@sampx}
 \def\@sampx#1{{\normalfont\texttt{#1}}\egroup'}
 \let\option=\samp
 
+\def\AsIs{\bgroup\let\do\@makeother\Rd@AsIs@dospecials\@noligs\@vobeyspaces\Rd@AsIsX}
+\def\Rd@AsIs@dospecials{\do\$\do\&\do\#\do\^\do\_\do\%\do\~}
+\def\Rd@AsIsX#1{\normalfont #1\egroup}
+
 % This is a workaround for the old Rdconv to handle \Sexpr by echoing it
 % Rd2latex() should never let \Sexpr through to here.
 \newcommand\Sexpr[2][]{{\normalfont\texttt{\bsl Sexpr[#1]\{#2\}}}}

src/library/grid/vignettes/grid.Rnw

@@ -87,7 +87,7 @@ grid.show.viewport(viewport(x = 0.5, y = 0.5, width = 0.5, height = 0.25,
 \caption{
   \label{figure:viewport}
   A diagram of a simple \grid{} viewport (produced using the
-  \protect\code{grid.show.viewport()} function.}
+  \code{grid.show.viewport()} function.}
 \end{figure}
 
 The object returned by the \code{viewport()} function is only a
@@ -524,7 +524,7 @@ popViewport(2)
 }
 \end{center}
 \caption{\label{figure:simpleplot}
-        The grid equivalent of \protect\code{plot(1:10)}.}
+        The grid equivalent of \code{plot(1:10)}.}
 \end{figure}
 
 Now consider a more complex example, where we create a barplot