On Wed, 30 Sep 2020, Ondrej Pokorny via lazarus wrote:
On 30.09.2020 10:55, Michael Van Canneyt via lazarus wrote:
Does Lazarus offer the functionality Delphi has (since quite some time, I
might add): custom debug info visualizers ?
See
http://docwiki.embarcadero.com/RADStudio/Sydney/en/Debugger_Visualizers
Seems like a useful addition. Don't know if it is technically
feasible, though.
Yes, I implemented them, IIRC. Don't remember the details, though. I
added TDate, TDateTime and TTime formatters. It was quite a simple
addon, should be easy to find in the sources.
Good news :-)
How to activate them ? Because everywhere I tried, a TDateTime is still
displayed as a float: 44104.47848875 does not look like a date/time I can
recognize... :-)
I tried tooltip evaluation, evaluate/modifiy, inspect, local variables,
watches. None of them seems to use this.
The problem of object-based visualizers like a visualizer for TStrings
is that your Lazarus IDE has to be compiled with the same FPC
version/codebase that you also use for the debugged program. In Delphi
this is usually the case (if you don't fiddle with RTL sources to fix
bugs). In FPC/Lazarus this doesn't need to apply. I usually build
Lazarus IDE less frequently than I update and build FPC trunk. Or you
can build Lazarus with FPC stable but develop applications with FPC
trunk. In that case such additions are unsafe.
I understand this need to keep versions aligned, but for the average
user who simply installs Lazarus, this will always be the case:
they get lazarus/FPC bundled.
In this matter the Laz/FPC developers are the exception.
(one could think "it's their own fault that they make it difficult" ;-) )
So with this caveat in mind, I think support for object-based visualizers
should definitely be added. Lazarus can easily enough detect that the version
of FPC it uses for a project differs from the FPC version the IDE was compiled
with, and disable the object-based visualizers.
Michael.
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