On Fri, 14 Aug 2009, Graeme Geldenhuys wrote:
Lance Collins wrote:
Sorry if this is the wrong place to discuss language issues.
Probably the fpc-dev mailing list.
How can you avoid circular references with two modules that interact with
each other?
[...snip...]
This feature is often needed and the "if you need to do that then
something is wrong with your design" argument doesn't fly with me.
I can't agree more. Sometimes there is a valid design for something like
that. The compilers already handle forward declarations in the same unit, so
why can that not be applied for multiple units as well. And if the forward
declaration is not fully resolved by the time the whole project or unit is
compiled - raise a compiler error.
The current usage of forward declaration is exactly the same principle we are
trying to use, but this time just across units.
This is the world upside down. Better tell us exactly why you think this must
be possible. the 'Sometimes there is a valid design for something like that'
is not an argument at all. Maybe there are other - more valid - ways to
accomplish what you want.
Michael.
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