macro_rules! instantiable {
($($tt:tt)*) => { ... };
}Expand description
Indicates that a C++ type can definitely be instantiated. This has effect only in a very specific case:
- the type is a typedef to something else
- the ‘something else’ can’t be fully inspected by autocxx, possibly becaue it relies on dependent qualified types or some other template arrangement that bindgen cannot fully understand.
In such circumstances, autocxx normally has to err on the side of caution
and assume that some type within the ‘something else’ is itself a forward
declaration. That means, the opaque typedef won’t be storable within
a cxx::UniquePtr. If you know that no forward declarations are involved,
you can declare the typedef type is instantiable and then you’ll be able to
own it within Rust.
The syntax is:
instantiable!("CppNameGoesHere")
A directive to be included inside include_cpp - see include_cpp for general information.