Similar to functions, implementations require care to remain generic.
#![allow(unused)]fnmain() {
structS; // Concrete type `S`structGenericVal<T>(T); // Generic type `GenericVal`// impl of GenericVal where we explicitly specify type parameters:impl GenericVal<f32> {} // Specify `f32`impl GenericVal<S> {} // Specify `S` as defined above// `<T>` Must precede the type to remain genericimpl<T> GenericVal<T> {}
}