blob: 6b2bbbe2e4fb971632055ec1740587d66bd6c6ef (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
// Test equality constraints in a where clause where the type being
// equated appears in a supertrait.
pub trait Vehicle {
type Color;
fn go(&self) { }
}
pub trait Car : Vehicle {
fn honk(&self) { }
}
struct Black;
struct ModelT;
impl Vehicle for ModelT { type Color = Black; }
impl Car for ModelT { }
struct Blue;
struct ModelU;
impl Vehicle for ModelU { type Color = Blue; }
impl Car for ModelU { }
fn black_car<C:Car<Color=Black>>(c: C) {
}
fn blue_car<C:Car<Color=Blue>>(c: C) {
}
fn a() { black_car(ModelT); }
fn b() { blue_car(ModelT); } //~ ERROR type mismatch
fn c() { black_car(ModelU); } //~ ERROR type mismatch
fn d() { blue_car(ModelU); }
pub fn main() { }
|
