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<?xml version="1.0" encoding="UTF-8"?>
<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" xmlns:scilab="http://www.scilab.org" xml:lang="en" xml:id="funcprot">
<refnamediv>
<refname>funcprot</refname>
<refpurpose>switch scilab functions protection mode</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Calling Sequence</title>
<synopsis>funcprot(prot)
previousprot = funcprot(prot)
prot = funcprot()
</synopsis>
</refsynopsisdiv>
<refsection>
<title>Arguments</title>
<variablelist>
<varlistentry>
<term>prot</term>
<listitem>
<para>an integer with possible values 0, 1, 2</para>
</listitem>
</varlistentry>
<varlistentry>
<term>previousprot</term>
<listitem>
<para>an integer with possible values 0, 1, 2 returns previous value</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>
Scilab functions are variable, <function>funcprot</function> allows the user to specify
what Scilab do when such variables are redefined.
</para>
<itemizedlist>
<listitem>
<para>
If <code>prot == 0</code> nothing special is done.
</para>
</listitem>
<listitem>
<para>
If <code>prot == 1</code> Scilab issues a warning message when a function is redefined (default mode).
</para>
</listitem>
<listitem>
<para>
If <code>prot == 2</code> Scilab issues an error when a function is redefined.
</para>
</listitem>
</itemizedlist>
</refsection>
<refsection>
<title>Examples</title>
<programlisting role="example"><![CDATA[
previousprot = funcprot(1)
deff('x = foo(a)','x = a;')
deff('x = foo(a)','x = a + 1;')
foo = 33
funcprot(0)
deff('x = foo(a)', 'x = a;')
deff('x = foo(a)', 'x = a + 1;')
foo = 33
funcprot(previousprot)
]]></programlisting>
</refsection>
<refsection>
<title>History</title>
<revhistory>
<revision>
<revnumber>5.4.0</revnumber>
<revremark>Previous value is returned as output argument when setting a new value.</revremark>
</revision>
</revhistory>
</refsection>
</refentry>
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