Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!udel!haven!umd5!crabcake!zhu
From: zhu@crabcake.cs.jhu.edu (Benjamin Zhu)
Newsgroups: comp.lang.c++
Subject: Re: Scoping bug???
Message-ID: <1251@crabcake>
Date: 11 Apr 90 23:04:11 GMT
References: <2582@ektools.UUCP>
Reply-To: zhu@crabcake.cs.jhu.edu (Benjamin Zhu)
Organization: Johns Hopkins University CS Dept.
Lines: 56

In article <2582@ektools.UUCP> randolph@ektools.UUCP (Gary L. Randolph) writes:
[stuffs deleted here]
>There appears to be a scoping problem with locally defined classes
>that contain a member function.  The following example compiles without
>a hitch on my Sun.  I am using Sun's 2.0 cfront.
>
>By commenting out the member function (and the call) the compiler
>correctly generates an error, but as is, the compiler does not
>recognize a problem.  Am I missing somthing? Sure smells like a bug.
>
>
>#include <iostream.h>
>main()
>{
>void func();     //prototype
>
>//local class definition
>class X{
>	public:
>		int i;
>		float f;
>		void printIt(){cout<<"\nHello\n";}
>}c;
>c.i = 1;
>c.f = 3.3;
>c.printIt();
>cout<<"\ni: "<<c.i<<"\nf: "<<c.f<<endl;
>func();
>}
>
>void func(){
>X x;         //COMPILER TAKES THIS
>x.i = 2;
>x.f = 44.5;
>cout<<"\ni: "<<x.i<<"\nf: "<<x.f<<endl;
>}
>
>
>Thanks, 
>      Gary

Our AT&T cfront 2.0 also displays the same problem. Personally I believe
it is a scoping bug. Actually there is a paragraph concerning this in
Lippman's C++ Primer (pp222-223).

	A class can be defined within the scope of a file. Its class name
	is visible only within the boundary of its local scope. blah, blah,
	blah...

I do not know why we have this bug here. Does AT&T give different versions
of the cfront translator?!

Benjamin Zhu
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