[Bug mi/10586] Anonymous unions/structs not handled correctly under MI

["nickrob at snap dot net dot nz" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From nickrob at snap dot net dot nz  2009-10-11 00:36 -------
Subject:  Anonymous unions/structs not handled correctly under MI

 > The above session is via Eclipse/CDT, not manually controlled by me. It's the
 > output from the CDT set to verbose. If CDT is in fact issuing senseless
 > commands, I'll definitely file a new bug with them .

OK, that's interesting.  I would presume that there is a purpose.  In that case:

 > > (gdb) 
 > > 522 ptype test::<anonymous struct>
 > > &"ptype test::<anonymous struct>\n"
 > > &"A syntax error in expression, near `<anonymous struct>'.\n"
 > > 522^error,msg="A syntax error in expression, near `<anonymous struct>'."

I think this is a bug with CDT as it shouldn't be using ptype and, if it does,
it needs to ensure it has a valid expression or data type as an argument.

 > > (gdb) 
 > > 534-data-evaluate-expression ((bar).0).a
 > > 534^error,msg="A syntax error in expression, near `.0).a'."

This would be a bug in GDB (if my patch is installed) ...

 > The version of Eclipse/CDT I use is Galileo-SR1. It's the version you'll get if
 > you choose "Eclipse IDE for C/C++ Developers" from http://www.eclipse.org/downloads/
 > 
 > The patch definitely works with the simple tests I posted. When I get into work
 > tomorrow I'll throw my main code at it (It uses anonymous structs/unions heavily).

... however, if behaviour is improved then, although not perfect, it's probably
worth installing this change.

 > As a matter of style, can I suggest names such as anon_union_1 or anon_struct_5
 > rather than just numbers?

I suggest proposing such changes on the gdb mailing list where it will receive
wider attention.



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http://sourceware.org/bugzilla/show_bug.cgi?id=10586

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