RFC: scope and borrowing

[Walter Bright via Digitalmars-d]

Previous discussions:

http://www.digitalmars.com/d/archives/digitalmars/D/borrowed_pointers_vs_ref_232090.html

http://www.digitalmars.com/d/archives/digitalmars/D/RFC_scope_and_borrowing_240834.html

http://www.digitalmars.com/d/archives/digitalmars/D/scope_escaping_222858.html

http://www.digitalmars.com/d/archives/digitalmars/D/ref_is_unsafe_184935.html