mirror of https://github.com/rust-lang/rust.git
16 lines
390 B
Rust
16 lines
390 B
Rust
//@ compile-flags: -Zpolymorphize=on -Zinline-mir=yes
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//@ known-bug: #122909
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use std::sync::{Arc, Context, Weak};
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pub struct WeakOnce<T>();
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impl<T> WeakOnce<T> {
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extern "rust-call" fn try_get(&self) -> Option<Arc<T>> {}
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pub fn get(&self) -> Arc<T> {
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self.try_get()
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.unwrap_or_else(|| panic!("Singleton {} not available", std::any::type_name::<T>()))
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}
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}
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