mirror of https://github.com/rust-lang/rust
29 lines
755 B
Rust
29 lines
755 B
Rust
//@ run-pass
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#![recursion_limit="1024"]
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#![allow(dead_code)]
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use std::mem;
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pub struct S0<T>(T,T);
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pub struct S1<T>(Option<Box<S0<S0<T>>>>,Option<Box<S0<S0<T>>>>);
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pub struct S2<T>(Option<Box<S1<S1<T>>>>,Option<Box<S1<S1<T>>>>);
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pub struct S3<T>(Option<Box<S2<S2<T>>>>,Option<Box<S2<S2<T>>>>);
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pub struct S4<T>(Option<Box<S3<S3<T>>>>,Option<Box<S3<S3<T>>>>);
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pub struct S5<T>(Option<Box<S4<S4<T>>>>,Option<Box<S4<S4<T>>>>,Option<T>);
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trait Foo { fn xxx(&self); }
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/// some local of #[fundamental] trait
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trait Bar {}
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impl<T> Foo for T where T: Bar, T: Sync {
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fn xxx(&self) {}
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}
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impl Foo for S5<u8> { fn xxx(&self) {} }
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fn main() {
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let s = S5(None,None,None);
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s.xxx();
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assert_eq!(mem::size_of_val(&s.2), mem::size_of::<Option<u8>>());
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}
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