On Tuesday, 19 July 2016 at 06:46:44 UTC, Mike Parker wrote:
On Tuesday, 19 July 2016 at 06:32:32 UTC, Rufus Smith wrote:
Error: 'this' is only defined in non-static member functions,
not __lambda2
Lambda's are delegates and delegates have a "this" type of
pointer. I would like to get at it inside the lambda to check
for some things. I'm doing some funky stuff. I'm not concerned
about the scope or what this actually pointers to or anything
like that, just need it's value for debugging.
No, delegates do not have a "this" type of pointer. "this" is
an implicit function parameter in a class or struct member
function. Delegates have no such thing. The only generic way I
know of to get at a delegate's function pointer inside the
implementation is to explicitly add the pointer type to the
parameter list as part of the declaration and pass it as an
argument when you call the delegate.
Delegates do have a this, they have a context pointer that is
implicitly passed and used to access the outside context. It is
no different than methods. Just because the explicit
implementation details are different does not change the
underlying meaning.
