32 lines
549 B
Rust
32 lines
549 B
Rust
struct Struct(i32);
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trait Trait {
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fn method(&self);
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}
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impl Trait for Struct {
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fn method(&self) {
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assert_eq!(self.0, 42);
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}
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}
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struct Foo<T: ?Sized>(T);
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fn main() {
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let y: &Trait = &Struct(42);
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y.method();
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let x: Foo<Struct> = Foo(Struct(42));
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let y: &Foo<Trait> = &x;
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y.0.method();
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/*
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let x: Box<Fn(i32) -> i32> = Box::new(|x| x * 2);
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assert_eq!(x(21), 42);
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let mut i = 5;
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{
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let mut x: Box<FnMut()> = Box::new(|| i *= 2);
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x(); x();
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}
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assert_eq!(i, 20);
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*/
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}
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