35 lines
463 B
Text
35 lines
463 B
Text
|
|
pub struct i32;
|
|
pub struct i64;
|
|
pub struct isize;
|
|
pub struct u32;
|
|
pub struct u64;
|
|
pub struct usize;
|
|
|
|
trait Num;
|
|
|
|
fn (a: N) + (b: N) -> N where N: Num {
|
|
N::add(a, b)
|
|
}
|
|
|
|
fn (a: N) - (b: N) -> N where N: Num {
|
|
N::sub(a, b)
|
|
}
|
|
|
|
fn (a: N) / (b: N) -> N where N: Num {
|
|
N::div(a, b)
|
|
}
|
|
|
|
fn (a: N) * (b: N) -> N where N: Num {
|
|
N::mul(a, b)
|
|
}
|
|
|
|
// precedence a + b < a * b;
|
|
|
|
pub fn fac(n: I) -> I where I: int {
|
|
match n {
|
|
0 => 1,
|
|
i => i * fac(i-1),
|
|
}
|
|
}
|
|
|