Re: [PATCH v1 02/36] Guile extension language: doc additions

[ludo at gnu dot org (Ludovic CourtÃs)]

Eli Zaretskii <eliz@gnu.org> skribis:

>> From: ludo@gnu.org (Ludovic CourtÃs)
>> Cc: gdb-patches@sourceware.org
>> Date: Sat, 04 Jan 2014 12:57:21 +0100
>> 
>> > What about long double support?
>> 
>> Guile doesnât support it out of the box.
>> 
>> If needed, it could easily be implemented as an extension: one would use
>> a SMOB to wrap long doubles and pass them to Scheme, and possibly define
>> methods for â+â, â-â, etc. for objects of this type.
>> 
>> Of course, this wouldnât be terribly efficient, but thatâs not so
>> important here I think; what matters is that it would allow âlong
>> doubleâ values to be passed around without loss of accuracy.
>> 
>> That said, my feeling is that leaving things as is (with long doubles
>> cast to doubles) may prove to be sufficient for most practical uses of
>> GDB.
>> 
>> WDYT?
>
> Well, GDB supports long double if the target does, so I thought it
> would be a pity to lose that when working with Guile.

Weâre talking about âmake-valueâ here, which does allow users to create
a âlong doubleâ value, AIUI.

Whatâs lost is that users can only inject in the debuggee values with
the accuracy of a âdoubleâ.

This is a theoretical limitation, but Iâm tempted to think that this is
rarely (if ever) a concern in practice.

How do the Python bindings handle this?

Thanks,
Ludoâ.