Op Wed, 16 Jul 2008, schreef Graeme Geldenhuys:
It compiles without issues under FPC 2.2.3 and prior. What is wrong
with using Include() to add to a set? I do it all the time, plus
WindowAttribute is a read/write property, unlike the compiler error in
2.0.4 where you could use Include() with a read-only property. Is
this not a regression bug in FPC 2.3.1 maybe?
2.3 prevents you form taking the address of a property, because that way
you can read/write its value directly, circumventing the getter/setter. So
you cannot use the @ operator, but neither can you pass properties to var
parameters. Include is an internal procedure that calls an rtl function
that receives the set as a "var" parameter, preventing include to work.
I think there can be two visions here:
- Include is not a real procedure, so this internal implementation detail
should be hidden and this can/should be allowed; the
compiler internally should convert it into set:=set+[member].
- While include is not a real procedure, its set parameter is clearly
defined as "var". Passing properties to var parameters is not allowed,
so it should not be allowed for include either.
Daniël
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