implement missing functions

[20162026]

implement:

• try_append_range try_append_range is not implemented #64
• assign initializer_list operator=(initializer_list) is not implemented #81

Fixes #64
Fixes #81

[20162026]

There were already some tests for AssignInitializerList but the compiler probably substituted the il assignment with something else (il constructor?), so they passed successfully even without the implementation

[JeffGarland]

surely this is a pessimisation if the current is smaller than than the il -- of course we can't get the size of the initializer list because sometimes we're really dumb...

however we could perform the insert first and then only clear the elements needed -- hmm -- yeah idk this might be better. ugh

[20162026]

I dont think it matters much as for trivial type clear is just a setsize and for nontrivial it is setsize+destructor call (no memory allocation or other potential overhead).

[JeffGarland]

well currently there's no optimization for trivial types -- which is a whole thing. it actually destroys all the elements.

edit: no it just erases, which doesn't destruct

edit2: So why isn't this simply assign_range( il );

[20162026]

yeah I will fix that, it definatly should have been assign_range...

also constexpr iterator insert(const_iterator position, InputIterator first, InputIterator last) implementation might not be correct, but I will investigate it tomorrow.

[wusatosi]

edit: no it just erases, which doesn't destruct

What do you mean here

[JeffGarland]

I'm approving even though I have one outstanding comment. This is better than it was and I'm sure there will be more passes on this code for further possible optimizations.

[wusatosi]

thank you for your contribution