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|
//@ run-pass
#![allow(non_shorthand_field_patterns)]
use std::mem;
struct S {
x: isize,
y: isize,
}
type S2 = S;
struct S3<U,V> {
x: U,
y: V
}
type S4<U> = S3<U, char>;
fn main() {
let s = S2 {
x: 1,
y: 2,
};
match s {
S2 {
x: x,
y: y
} => {
assert_eq!(x, 1);
assert_eq!(y, 2);
}
}
// check that generics can be specified from the pattern
let s = S4 {
x: 4,
y: 'a'
};
match s {
S4::<u8> {
x: x,
y: y
} => {
assert_eq!(x, 4);
assert_eq!(y, 'a');
assert_eq!(mem::size_of_val(&x), 1);
}
};
// check that generics can be specified from the constructor
let s = S4::<u16> {
x: 5,
y: 'b'
};
match s {
S4 {
x: x,
y: y
} => {
assert_eq!(x, 5);
assert_eq!(y, 'b');
assert_eq!(mem::size_of_val(&x), 2);
}
};
}
|
