Am 28.04.2021 um 00:53 schrieb Graeme Geldenhuys via fpc-pascal:
On 27/04/2021 10:13 pm, Ryan Joseph via fpc-pascal wrote:
value.SortEntities(function(a, b: TEntity): integer
begin
// do stuff
end
);
It seem the beginning of the thread is missing, but I would like to
comment on something here - purely based on the example code given.
The SortEntities() is defined with a signature of type TComparator,
which in turn is a function that takes 2 arguments of type TEntity
and returns a integer.
Why must the anonymous function repeat all that information again,
as shown in the quoted code above? Can't the compiler figure all
that out simply by inference? All the developer should have to do
is give the 2 parameters a name, and a function body (block of
code). Thus you could end up with something like this:
First: Pascal does not support type inference which would be required
for this.
Second: the syntax is required for Delphi compatibility anyway - and the
main idea *is* to be able to use libraries like Spring4D or
OmniThreadLibrary in FPC so I don't want *anyone* to whine about this,
thus it makes no sense to introduce a new syntax (as much as I'd love to
as well).
Regards,
Sven
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