This remove support for coercing non-ReferenceCounted types that are neither default-constructible nor move-assignable, but it turns out none of the classes we really need it for matches that.
It further cuts down on the amount of code that is being generated to support coercion in cases where it makes absolutely no sense.
* Allow arbitrary selection of optional keyword arguments in some cases
* Reduce code bloat of generated bindings
* Work around awkward resolution of set_shader_input overloads
* Document the code a bit better
* Make coercion a bit cleaner for reference counted types
* A few optimization tweaks
* Use generic errors in NDEBUG build to reduce size of string pool
rdb
David Rose