Hi,
FPC allows to type cast a class-of variable to a class instance. Is this a bug or a feature?
var
c: TClass;
begin
TObject(c).ClassName; // crash
end.Mattias
Mailing lists / fpc-pascal / 2017-02
Typecast class-of to class
3 messages · 3 people ·
- Jonas Maebe 1
- Marco van de Voort 1
- Mattias Gaertner 1
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In our previous episode, Mattias Gaertner said:
Show quoted text 9 lines
FPC allows to type cast a class-of variable to a class instance. Is
this a bug or a feature?
var
c: TClass;
begin
TObject(c).ClassName; // crash
end.
Feature (allowed because equal in size), used in e.g. Registerxxx functions to add class references to the .objects part of tstringlist. Delphi has no container type for references
FPC allows to type cast a class-of variable to a class instance. Is this a bug or a…
Mattias Gaertner wrote 8 lines
FPC allows to type cast a class-of variable to a class instance. Is
this a bug or a feature?
var
c: TClass;
begin
TObject(c).ClassName; // crash
end.
With -CR you should get an object check error instead.
Jonas