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\subsection{execute}
\label{labexecute}
\noindent Name: \textbf{execute}\\
\phantom{aaa}executes the content of a file\\[0.2cm]
\noindent Library name:\\
\verb| void sollya_lib_execute(sollya_obj_t)|\\[0.2cm]
\noindent Usage:
\begin{center}
\textbf{execute}(\emph{filename}) : \textsf{string} $\rightarrow$ \textsf{void}\\
\end{center}
Parameters:
\begin{itemize}
\item \emph{filename} is a string representing a file name
\end{itemize}
\noindent Description: \begin{itemize}
\item \textbf{execute} opens the file indicated by \emph{filename}, and executes the sequence of
commands it contains. This command is evaluated at execution time: this way you
can modify the file \emph{filename} (for instance using \textbf{bashexecute}) and execute it
just after.
\item If \emph{filename} contains a command \textbf{execute}, it will be executed recursively.
\item If \emph{filename} contains a call to \textbf{restart}, it will be neglected.
\item If \emph{filename} contains a call to \textbf{quit}, the commands following \textbf{quit}
in \emph{filename} will be neglected.
\end{itemize}
\noindent Example 1:
\begin{center}\begin{minipage}{15cm}\begin{Verbatim}[frame=single]
> a=2;
> a;
2
> print("a=1;") > "example.sollya";
> execute("example.sollya");
> a;
1
\end{Verbatim}
\end{minipage}\end{center}
\noindent Example 2:
\begin{center}\begin{minipage}{15cm}\begin{Verbatim}[frame=single]
> verbosity=1!;
> print("a=1; restart; a=2;") > "example.sollya";
> execute("example.sollya");
Warning: a restart command has been used in a file read into another.
This restart command will be neglected.
> a;
2
\end{Verbatim}
\end{minipage}\end{center}
\noindent Example 3:
\begin{center}\begin{minipage}{15cm}\begin{Verbatim}[frame=single]
> verbosity=1!;
> print("a=1; quit; a=2;") > "example.sollya";
> execute("example.sollya");
Warning: the execution of a file read by execute demanded stopping the interpret
ation but it is not stopped.
> a;
1
\end{Verbatim}
\end{minipage}\end{center}
See also: \textbf{parse} (\ref{labparse}), \textbf{readfile} (\ref{labreadfile}), \textbf{write} (\ref{labwrite}), \textbf{print} (\ref{labprint}), \textbf{bashexecute} (\ref{labbashexecute}), \textbf{quit} (\ref{labquit}), \textbf{restart} (\ref{labrestart})
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