mirror of https://github.com/rust-lang/rust
22 lines
561 B
Rust
22 lines
561 B
Rust
//@ compile-flags: -Zvalidate-mir -Zinline-mir=yes
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#![feature(unboxed_closures)]
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use std::sync::Arc;
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pub struct WeakOnce<T>();
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//~^ ERROR type parameter `T` is never used
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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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//~^ ERROR functions with the "rust-call" ABI must take a single non-self tuple argument
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//~| ERROR mismatched types
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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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fn main() {}
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