54 lines
1.2 KiB
Rust
54 lines
1.2 KiB
Rust
//@ run-pass
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#![feature(fn_delegation)]
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#![allow(incomplete_features)]
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trait Trait {
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fn bar(&self, x: i32) -> i32 { x }
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fn description(&self) -> &str {
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"hello world!"
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}
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fn static_method(x: i32) -> i32 { x }
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fn static_method2(x: i32, y: i32) -> i32 { x + y }
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}
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struct F;
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impl Trait for F {}
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mod to_reuse {
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pub fn foo(x: i32) -> i32 { x + 1 }
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pub fn zero_args() -> i32 { 15 }
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}
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reuse to_reuse::zero_args { self }
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struct S(F);
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impl Trait for S {
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reuse Trait::bar { self.0 }
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reuse Trait::description { self.0 }
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reuse <F as Trait>::static_method;
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reuse <F as Trait>::static_method2 { S::static_method(self) }
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}
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impl S {
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reuse <F as Trait>::static_method { to_reuse::foo(self) }
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}
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impl std::fmt::Display for S {
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reuse <str as std::fmt::Display>::fmt { self.description() }
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}
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fn main() {
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let s = S(F);
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assert_eq!(42, s.bar(42));
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assert_eq!("hello world!", format!("{s}"));
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assert_eq!(43, S::static_method(42));
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assert_eq!(42, <S as Trait>::static_method(42));
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assert_eq!(21, S::static_method2(10, 10));
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#[inline]
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reuse to_reuse::foo;
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assert_eq!(43, foo(42));
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assert_eq!(15, zero_args());
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}
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