Re: [obv] compile-print.exp: xfail->kfail for '@' GDB array operator

[Yao Qi <qiyaoltc@gmail.com>]

Jan Kratochvil <jan.kratochvil@redhat.com> writes:

Hi, Jan,
This patch isn't obvious to me... see my question below,

> Patch implementing '@' GDB array operator in GCC has been rejected:
> 	https://gcc.gnu.org/ml/gcc-patches/2015-06/msg00414.html
> and so there is now a GDB tracker to implement it just in GDB:
> 	https://sourceware.org/bugzilla/show_bug.cgi?id=18489

If '@' is rejected in GCC, why do we need to support it in "compile"
feature in GDB?  The manual of command "compile print" says:

  Compile and execute expr with the compiler language found as the
  current language in GDB

'@' isn't a valid operator for C language, we should emit error here.
IMO, "compile" feature should *only* accept valid source code according
to the language spec and the compiler.  It will be really confusing if
we add some other things (like '@' in this case) which is out of the
scope of the language.

> @@ -38,7 +38,7 @@ gdb_test_multiple $test $test {
>  	pass $test
>      }
>      -re ": error: stray '@' in program\r\n.*\r\n$gdb_prompt $" {
> -	xfail "$test (gcc does not support '@')"
> +	kfail compile/18489 "$test"
>      }
>  }

I think xfail is correct as gcc doesn't support '@'.

-- 
Yao (齐尧)