[fpc-pascal] Wrong constructor returning the right object

[Jeppe Græsdal Johansen]

Den 23-02-2014 17:03, Mark Morgan Lloyd skrev:
> Marco van de Voort wrote:
>> In our previous episode, Mark Morgan Lloyd said:
>>
>> That logical, since the constructors are not an virtual; and 
>> override; pair.
>>
>>> I find that if I explicitly decorate TB5500BaseUnit.Create() as 
>>> virtual and TB5500SPOUnit.Create() as override then 
>>> TB5500SPOUnit.Create() is called correctly. 
>>
>> That's the normal way.
>>
>>> I didn't think this was necessary, 
>>
>> _why_ did you think this?
>
> In part, because the documentation on method declarations at 
> http://www.freepascal.org/docs-html/ref/refsu25.html#x66-730005.5.1 
> explicitly allows a  virtual  method directive, but the documentation 
> on constructor declarations at 
> http://www.freepascal.org/docs-html/ref/refse28.html#x64-710005.4 
> explicitly does not allow it.
That documentation is about objects, not classes.

Here's the relevant part for classes: 
http://www.freepascal.org/docs-html/ref/refsu25.html#x66-730005.5.1