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                    <a href="../../../html/index.html">Home</a> &raquo; <a href="../../../html/pmc.html">PMCs</a> &raquo; Generic undefined value
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<h1><a name="NAME"
>NAME</a></h1>

<p>src/pmc/undef.pmc &#45; Generic undefined value</p>

<h1><a name="DESCRIPTION"
>DESCRIPTION</a></h1>

<p>This is Parrot&#39;s generic undef type.
This PMC has no defined value.
It returns a numeric value of 0,
a boolean of false,
and an empty string.
When assigned a number,
integer,
or string it morphs to a Number,
Integer,
or String PMC respectively,
and when assigned a generic PMC it morphs into a PMC of the passed&#45;in type and does a same&#45;type assignment from there.</p>

<h2><a name="Methods"
>Methods</a></h2>

<dl>
<dt><a name="void_set_pmc(PMC_*other)"
><b><code>void set_pmc(PMC *other)</b></code></a></dt>
Sets the current PMC to <code>*other</code> by first changing the current PMC to the appropriate type.
<dt><a name="void_assign_pmc(PMC_*other)"
><b><code>void assign_pmc(PMC *other)</b></code></a></dt>
Assigns the PMC to the value of <code>*other</code> by first changing the PMC to the appropriate type.
<dt><a name="INTVAL_get_integer()"
><b><code>INTVAL get_integer()</b></code></a></dt>
Returns 0.
<dt><a name="INTVAL_defined()"
><b><code>INTVAL defined()</b></code></a></dt>
Returns 0.
<dt><a name="void_set_integer_native(INTVAL_value)"
><b><code>void set_integer_native(INTVAL value)</b></code></a></dt>
Morphs the current PMC to an <code>Integer</code> and sets the value from <code>value</code>.
<dt><a name="FLOATVAL_get_number()"
><b><code>FLOATVAL get_number()</b></code></a></dt>
Returns 0.0.
<dt><a name="void_set_number_native(FLOATVAL_value)"
><b><code>void set_number_native(FLOATVAL value)</b></code></a></dt>
Morphs the current PMC to a <code>Float</code> and sets the value from <code>value</code>.
<dt><a name="STRING_*get_string()"
><b><code>STRING *get_string()</b></code></a></dt>
Returns an empty string.
<dt><a name="void_set_string_native(STRING_*value)"
><b><code>void set_string_native(STRING *value)</b></code></a></dt>
Morphs the current PMC to a <code>String</code> and sets the value from <code>value</code>.
<dt><a name="INTVAL_get_bool()"
><b><code>INTVAL get_bool()</b></code></a></dt>
Returns 0.
<dt><a name="INTVAL_logical_not()"
><b><code>INTVAL logical_not()</b></code></a></dt>
Returns 1.
<dt><a name="void_share()"
><b><code>void share()</b></code></a></dt>
Unknown.
(TODO)
<dt><a name="PMC_*share_ro()"
><b><code>PMC *share_ro()</b></code></a></dt>
Unknown.
(TODO)
<dt><a name="PMC_*clone()"
><b><code>PMC *clone()</b></code></a></dt>
Clones the current Undef PMC.
<dt><a name="INTVAL_is_equal(PMC_*value)"
><b><code>INTVAL is_equal(PMC *value)</b></code></a></dt>
Returns 1 if the <code>*value</code> is an Undef PMC,
0 otherwise.</dl>
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