stepan
/
preprocessor
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

doc: update macro processor doc for `@#elseif` and `defined`

issue#70
Houtan Bastani 2019-08-19 15:13:59 +02:00
parent b77f6ecd94
commit 588896b509
No known key found for this signature in database
GPG Key ID: 000094FB955BE169
1 changed files with 18 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
doc/macroprocessor/macroprocessor.tex
View File

@ -430,7 +430,7 @@ end;
\end{frame}
\begin{frame}[fragile=singleslide]
\frametitle{Conditional directives (1/2)}
\frametitle{Conditional directives (1/3)}
\begin{columns}[T]
\column{0.47\linewidth}
@ -449,6 +449,19 @@ end;
\verb+@#endif+
\end{block}
\end{columns}
\end{frame}
\begin{frame}[fragile=singleslide]
\frametitle{Conditional directives (2/3)}
\begin{block}{Syntax 3}
\verb+@#if +\textit{bool\_or\_real\_expr1} \\
\verb+ +\textit{body included if expr1 is true (or != 0)} \\
\verb+@#elseif +\textit{bool\_or\_real\_expr2} \\
\verb+ +\textit{body included if expr2 is true (or != 0)} \\
\verb+@#else+ \\
\verb+ +\textit{body included if expr1 and expr2 are false (or 0)} \\
\verb+@#endif+
\end{block}
\begin{block}{Example: alternative monetary policy rules}
\scriptsize
@ -469,7 +482,7 @@ end;
\end{frame}
\begin{frame}[fragile=singleslide]
\frametitle{Conditional directives (2/2)}
\frametitle{Conditional directives (3/3)}
\begin{columns}[T]
\column{0.47\linewidth}
@ -492,7 +505,9 @@ end;
\bigskip
There is also \verb+@#ifndef+, which is the opposite of \verb+@#ifdef+
(\textit{i.e.} it tests whether a variable is \emph{not} defined).
(\textit{i.e.} it tests whether a variable is \emph{not} defined). NB: There is
\emph{no} \verb+@#elseifdef+ or \verb+@#elseifndef+ directive; use
\verb+elseif defined(variable_name)+ to achieve the desired objective.
\end{frame}
\begin{frame}[fragile=singleslide]