[Issue 12811] GC-allocated closure for calling instance function in filter

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12811

--- Comment #2 from bearophile_hugs at eml.cc ---
(In reply to Kenji Hara from comment #1)

> 'filter' will lazily evaluate the given array outside of the 'spam'
> function, so the lambda 'i => bar(i)' needs to capture 'this' variable to
> call member function 'bar'.
> 
> It will make a closure allocation.

Thank you for the answer. We'll have to add some escape analysis to turn some
closure heap allocations into stack allocations.

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