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ObjcGrammarTest
by Gregor N. Purdy
1992 Feb 15 11:34- Genesis.
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This program is a simple demonstration of something
I thought seemed a little strange that is allowed
by NeXT's Objective-C grammar. The grammar info is
in the reference manual "Technical Summaries",
chapter 3.
I think there might be some applications where this
form could actually make sense...
Now, of course, all we need is the ability to do
things like this:
[myObject putMail:theMail intoMailBox:theBox andBeep];
^^^^^^^^
Which are currently NOT allowed by the grammar, but could
be added by adding one case on page 3-7 to the end of the
definition of message-selector:
keyword-argument-list selector
And a similarly-functioning line to method-selector on
page 3-5:
keyword-selector selector
Other Ideas:
As far as the grammar goes, it would be VERY easy to
add multiple inheritance to Objective-C:
On page 3-4 inside the definitions of "class-interface"
and "class-implementation", just replace "superclass-name"
with "superclass-specifier" and then add the definitions:
superclass-specifier:
superclass-name
{ superclass-list }
superclass-list:
superclass-name
superclass-list, superclass-name
Of course, the hard part is handling it in the runtime
system...
--Gregor
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