Path: utzoo!utgpu!watmath!uunet!nih-csl!elsie!cvl!haven!purdue!decwrl!ucbvax!tut.cis.ohio-state.edu!bloom-beacon!oberon!ucla-cs!rjc
From: rjc@maui.cs.ucla.edu
Newsgroups: gnu.g++.bug
Subject: G++ 1.34.1+ named return values
Message-ID: <21998@shemp.CS.UCLA.EDU>
Date: 19 Mar 89 21:24:41 GMT
Sender: news@CS.UCLA.EDU
Reply-To: rjc@CS.UCLA.EDU ()
Distribution: gnu
Organization: UCLA Computer Science Department
Lines: 36

Thanks for the explaination (`return;' not `return tmp;').

I would like to suggest/request a little more functionality with named
return values.  Specifically, it would be nice if the parameter names
of the function were visible to the return value declaration.  I would
like to say:
	struct A { ... A(int x); ... };
	A foo(int i) return tmp(i);
	{
		// do stuff to tmp
		return;
	}
rather than:
	struct A { ... A(int x); ... };
	A foo(int i) return tmp(-1);
	{
		tmp = i;	// tmp = A(i)
		// do stuff to tmp
		return;
	}

In general, this will save a constructor/destructor pair whenever the
return value is initialized based on the actual arguments that are
passed to the function.

I have not thought this idea through completely, so there may be good
reasons not to do this.  For me, this would be a big win.

Thanks,
rob collins (rjc@cs.ucla.edu)


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rjc@cs.ucla.edu
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