Instance of class

Anatomy

<instanceof class="var" var="var" var_result="var"/>

Description: INSTANCEOF checks whether a variable is an object of a given class.

Attention:

INSTANCEOF will throw an error for an undefined or invalid class.

The class variable 'class' may alternatively be an object in which case it's derived class is used instead.

Attributes

Name	Type	Description	Defined By
class	var	Class variable name	instanceof
var	var	Variable name	instanceof
var_result	var	Result variable name	instanceof

Results:

Binding	Type	Predicate
var_result	bool	N/A

Examples

Class related

<class var="Human"/>

<class var="Person">
  <extends class="Human"/>
  
  <property name="name"/>
  
  <constructor>
    <set var="this.name">$name</set>
  </constructor>
</class>

<new class="Person" var="obj">
  <param name="name">Bill Gates</param>
</new>

<instanceof class="Human" var="obj" var_result="instanceof"/>

<is var="instanceof" type="true">
  <output>$obj.name is a human!</output>
</is>

<!-- Bill Gates is a human! -->

Object related

<class var="Person">
  <property name="name"/>
  
  <constructor>
    <set var="this.name">$name</set>
  </constructor>
</class>

<new class="Person" var="obj1">
  <param name="name">Bill Gates</param>
</new>

<new class="Person" var="obj2">
  <param name="name">Steve Jobs</param>
</new>

<instanceof class="obj1" var="obj2" var_result="instanceof"/>

<is var="instanceof" type="true">
  <output>$obj1.name is of the same class as $obj2.name!</output>
</is>

<!-- Bill Gates is of the same class as Steve Jobs! -->