Samuel Williams daae0b6194 Add UniqueHandle non-const accessors, ensure all by reference. (#123)
* Add UniqueHandle non-const accessors, ensure all by reference.

- Add `Type * operator->()`
- Fix `Type get() const` to `const Type & get() const`
- Add `Type & get()`

* Add support for structure pointer chains was missing some generator code.

* Update vulkan.hpp with changes.
2017-09-14 15:22:47 +02:00
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