[Lazarus] Debugging in Lazarus, cannot inspect values at breakpoints...

Ondrej Pokorny lazarus at kluug.net
Wed Sep 30 11:12:29 CEST 2020

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.

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.


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