pub unsafe trait VectorElement: Sized { }Expand description
Trait bound for types which may be used as the T inside of a
CxxVector<T> in generic code.
This trait has no publicly callable or implementable methods. Implementing
it outside of the CXX codebase requires using explicit shim trait impls,
adding the line impl CxxVector<MyType> {} in the same cxx::bridge that
defines MyType.
§Example
A bound T: VectorElement may be necessary when manipulating CxxVector
in generic code.
use cxx::vector::{CxxVector, VectorElement};
use std::fmt::Display;
pub fn take_generic_vector<T>(vector: &CxxVector<T>)
where
T: VectorElement + Display,
{
println!("the vector elements are:");
for element in vector {
println!(" • {}", element);
}
}Writing the same generic function without a VectorElement trait bound
would not compile.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.