varobj/2073: subscript operator on typedef'ed reference fails

[schaudhu at blackrock dot com]

>Number:         2073
>Category:       varobj
>Synopsis:       subscript operator on typedef'ed reference fails
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 23 23:58:01 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     schaudhu@blackrock.com
>Release:        unknown-1.0
>Organization:
>Environment:
SunOS 5.8 Generic_108528-29 sun4u sparc SUNW,Sun-Fire-V210, gcc-3.4.4/4.0.0, gdb-6.4
>Description:
Attempting to display the results of a subscript operator call on a reference that has been typedef'ed displays the error "cannot subscript something of type CLASSNAME".  This is 100% reproducible in the environments specified.  Using either -gdb and -gstabs+ flags makes no difference.
>How-To-Repeat:
The following code demonstrates the error:

#include <iostream>

class Foo
{
private:

    int value;

public:

    Foo( const int val ) { value = val; }
    int operator[]( const int i ) const { return value; }
};

typedef Foo Bar;

int main()
{
    Foo foo1( 123 );
    std::cout << foo1[ 0 ] << std::endl;

    // In the debugger, type print foo1[ 0 ]: NO PROBLEM

    Foo &foo2 = foo1;
    std::cout << foo2[ 0 ] << std::endl;

    // In the debugger, type print foo2[ 0 ]: NO PROBLEM

    Bar &bar1 = foo1;
    std::cout << bar1[ 0 ] << std::endl;

    // In the debugger, type print bar1[ 0 ]: ERROR!
    // cannot subscript something of type `Foo'

    Bar bar2( 321 );
    std::cout << bar2[ 0 ] << std::endl;

    // In the debugger, type print bar2[ 0 ]: NO PROBLEM

    return 0;
}
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: