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// revisions: base extended
#![feature(generic_associated_types)]
#![cfg_attr(extended, feature(generic_associated_types_extended))]
#![cfg_attr(extended, allow(incomplete_features))]
pub trait SubTrait {}
pub trait SuperTrait {
type SubType<'a>: SubTrait where Self: 'a;
fn get_sub<'a>(&'a mut self) -> Self::SubType<'a>;
}
pub struct SubStruct<'a> {
sup: &'a mut SuperStruct,
}
impl<'a> SubTrait for SubStruct<'a> {}
pub struct SuperStruct {
value: u8,
}
impl SuperStruct {
pub fn new(value: u8) -> SuperStruct {
SuperStruct { value }
}
}
impl SuperTrait for SuperStruct {
type SubType<'a> = SubStruct<'a>;
fn get_sub<'a>(&'a mut self) -> Self::SubType<'a> {
SubStruct { sup: self }
}
}
fn main() {
let sub: Box<dyn SuperTrait<SubType = SubStruct>> = Box::new(SuperStruct::new(0));
//~^ ERROR missing generics for associated type
//[base]~^^ ERROR the trait
//[base]~| ERROR the trait
}
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