Re: MI testsuite to use PTY for inferior

[Daniel Jacobowitz <drow@false.org>]

On Sun, Jul 31, 2005 at 10:27:59AM +1200, Nick Roberts wrote:
> That seems to imply that if IPATTERN is present, MESSAGE can't be omitted.

Yes.  If this bugs you, you could make a message of "" be handled like
an omitted message.

> How about:
> 
> # mi_gdb_test COMMAND PATTERN-LIST [MESSAGE]
> ...
> # PATTERN-LIST is the list {PATTERN [IPATTERN]} where:
> # PATTERN is the pattern to match for a PASS, and must NOT include
> #   the \r\n sequence immediately before the gdb prompt.
> # IPATTERN is the pattern to match for the inferior's output. This will not 
> #   produce a PASS if successfull, but will produce a FAIL if unsuccessful.
> 
>     if {[llength $PATTERN-LIST] == 1} {
>  	...
>     } elseif {[llength $PATTERN-LIST] == 2} {
>         ...
> 
>   This seems to be compatible with existing arguments as scalars seem to be
> considered as lists of length 1.  But perhaps you can't have lists within
> argument lists in TCL.

No, that won't work correctly.  TCL quoting is funny.  Look at this:

% set a "a"
a
% llength $a
1
% set a "a b"
a b
% llength $a
2

It reparses the string, textually, as a list.  Most patterns will be
more than one "item".  This would be easy in Python, but is a bit of a
bear in TCL.

-- 
Daniel Jacobowitz
CodeSourcery, LLC