Trait core::panic::BoxMeUp

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pub unsafe trait BoxMeUp {
    // Required methods
    fn take_box(&mut self) -> *mut dyn Any + Send;
    fn get(&mut self) -> &(dyn Any + Send);
}
🔬This is a nightly-only experimental API. (std_internals)
Expand description

An internal trait used by std to pass data from std to panic_unwind and other panic runtimes. Not intended to be stabilized any time soon, do not use.

Required Methods§

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fn take_box(&mut self) -> *mut dyn Any + Send

🔬This is a nightly-only experimental API. (std_internals)

Take full ownership of the contents. The return type is actually Box<dyn Any + Send>, but we cannot use Box in core.

After this method got called, only some dummy default value is left in self. Calling this method twice, or calling get after calling this method, is an error.

The argument is borrowed because the panic runtime (__rust_start_panic) only gets a borrowed dyn BoxMeUp.

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fn get(&mut self) -> &(dyn Any + Send)

🔬This is a nightly-only experimental API. (std_internals)

Just borrow the contents.

Implementors§