From: "M. A. Alves" <maa@borba.ncc.up.pt>
To: comp.lang.ada@ada.eu.org
Subject: Why default values not taken?
Date: Tue, 12 Jun 2001 15:53:42 +0100 (WEST)
Date: 2001-06-12T15:53:42+01:00 [thread overview]
Message-ID: <mailman.992354057.29715.comp.lang.ada@ada.eu.org> (raw)
I want to create an object with only some components different from their
default values e.g.
Contact_Person := new Text_Item'(Remark => US("name and email"));
where Text_Item inherits Remark from Input_Item and adds Text, both
defaulting to Null_Unbounded_String:
type Input_Item is tagged record
Remark: Unbounded_String;
end record;
type Text_Item is new Input_Item with record
Text: Unbounded_String;
end record;
Of course I get the compile error "no value supplied for component Text".
But do I really have to supply values for all components? What is the
best idiom here?
Thanks,
--
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next reply other threads:[~2001-06-12 14:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-12 14:53 M. A. Alves [this message]
2001-06-12 15:04 ` Why default values not taken? Tucker Taft
2001-06-12 15:48 ` Jeffrey Carter
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