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|
// run-pass
// Test that we can use method notation to call methods based on a
// projection bound from a trait. Issue #20469.
trait MakeString {
fn make_string(&self) -> String;
}
impl MakeString for isize {
fn make_string(&self) -> String {
format!("{}", *self)
}
}
impl MakeString for usize {
fn make_string(&self) -> String {
format!("{}", *self)
}
}
trait Foo {
type F: MakeString;
fn get(&self) -> &Self::F;
}
fn foo<F:Foo>(f: &F) -> String {
f.get().make_string()
}
struct SomeStruct {
field: isize,
}
impl Foo for SomeStruct {
type F = isize;
fn get(&self) -> &isize {
&self.field
}
}
struct SomeOtherStruct {
field: usize,
}
impl Foo for SomeOtherStruct {
type F = usize;
fn get(&self) -> &usize {
&self.field
}
}
fn main() {
let x = SomeStruct { field: 22 };
assert_eq!(foo(&x), format!("22"));
let x = SomeOtherStruct { field: 44 };
assert_eq!(foo(&x), format!("44"));
}
|
