...from it's container object which would invalidate cthis.

(although we could convert it to...

...will overwrite the original array and thus invalidate the slice.)

Workarounds:
- Use items.dup. Problem...

...It cannot be derived that popFront will invalidate stuff just from the fact that the...

...C++ in order to anticipate and hopefully invalidate (mainly Andrei's) objections.

     parameter type     |   lvalue...

...C++ in order to anticipate and hopefully invalidate (mainly Andrei's) objections.

     parameter type     |   lvalue...

...all. What's more, when you *do* invalidate a range, chances are you'll never...

...thread) that return a new range that invalidate .front .
3/ Range that don't support...

...some of which require that they not invalidate ranges (i.e. they have stable in...

...immutable, ensures that calling popFront() will never invalidate them (by definition of immutable).

To use...

...actually allow them to not only not invalidate the result of previous front calls but...