Call an object method: Difference between revisions

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imported>Acediast
(→‎{{header|COBOL}}: added params)
imported>Acediast
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(. 1 (equals 2)) ; alternative style</syntaxhighlight>
(. 1 (equals 2)) ; alternative style</syntaxhighlight>
=={{header|COBOL}}==
=={{header|COBOL}}==
{{Works with|COBOL 2002}}
COBOL added object methods in 2002. It has two ways to invoke a method: the <code>INVOKE</code> statement and inline method invocation.
There are two ways to invoke a method: the <code>INVOKE</code> statement and inline method invocation.
<syntaxhighlight lang="cobol"> *> INVOKE statements.
<syntaxhighlight lang="cobolfree">*> INVOKE statements.
INVOKE my-class "some-method" *> Factory object
INVOKE my-class "some-method" *> Factory object
USING BY REFERENCE some-parameter
USING BY REFERENCE some-parameter
RETURNING foo
RETURNING foo
⚫
INVOKE my-instance "another-method" *> Instance object
⚫
USING BY REFERENCE some-parameter
⚫
RETURNING foo


⚫
*> Inline method invocation.
⚫
INVOKE my-instance "another-method" *> Instance object
⚫
MOVE my-class::"some-method"(some-parameter) TO foo *> Factory object
⚫
USING BY REFERENCE some-parameter
⚫
MOVE my-instance::"another-method"(some-parameter) TO foo *> Instance object</syntaxhighlight>
⚫
RETURNING foo

⚫
*> Inline method invocation.
⚫
MOVE my-class::"some-method"(some-parameter) TO foo
*> Factory object

⚫
MOVE my-instance::"another-method"(some-parameter) TO foo
*> Instance object</syntaxhighlight>


To call factory methods of objects of an unknown type (such as when you may have a subclass of the class wanted), it is necessary to get a reference to the class's factory object by calling the <code>"FactoryObject"</code> method.
To call factory methods of objects of an unknown type (such as when you may have a subclass of the class wanted), it is necessary to get a reference to the class's factory object by calling the <code>"FactoryObject"</code> method.
<syntaxhighlight lang="cobol"> INVOKE some-instance "FactoryObject" RETURNING foo-factory
<syntaxhighlight lang="cobolfree">INVOKE some-instance "FactoryObject" RETURNING foo-factory
*> foo-factory can be treated like a normal object reference.
*> foo-factory can be treated like a normal object reference.
INVOKE foo-factory "someMethod"</syntaxhighlight>
INVOKE foo-factory "someMethod"</syntaxhighlight>


=={{header|CoffeeScript}}==
=={{header|CoffeeScript}}==
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