Re: [outcome] Inline GDB pretty printing support

From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2024-07-02 10:58:45

On 7/2/24 13:52, Andrey Semashev wrote:
> On 7/1/24 17:45, Niall Douglas via Boost wrote:
>> Dear Boost,
>>
>> The biggest new feature to land into Outcome since it went ABI stable is 
>> inline GDB pretty printing support, whereby we embed into all binaries 
>> using Outcome the Python script to display the state of 
>> `result<>/outcome<>`. As Outcome uses a layered inheritance technique to 
>> match triviality of member functions from its configured types, having 
>> to click down through the layers to discover the state was always 
>> frustrating. MSVC has long shipped with a visualiser to eliminate this, 
>> so now support for GDB matches MSVC support.
>>
>> The relevant implementation file can be found at:
>>
>> https://github.com/boostorg/outcome/blob/master/include/boost/outcome/outcome_gdb.h
>>
>> I would appreciate any testing and reporting of any issues or bugs 
>> before the 1.86 bugfix window closes. It should "just work" once you 
>> have enabled inline script loading in your `.gdbinit`.
> 
> Is there a benefit to embedding python comments into the script? Since
> the embedded script itself presumably won't be read by a human, the
> comments are just unnecessary bloat to the binary size. You could
> preserve the comments in C++ though.

Also, on the topic of binary size, is this script embedded into the
final binary only once, even if the header is included in multiple TUs?