Trait PanicPayload

#[doc(hidden)] pub unsafe trait PanicPayload: Display {
    // Required methods
    fn take_box(&mut self) -> *mut dyn Any + Send;
    fn get(&mut self) -> &(dyn Any + Send);

    // Provided method
    fn as_str(&mut self) -> Option<&str> { ... }
}

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

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

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 PanicPayload.

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

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

Just borrow the contents.

Provided Methods

fn as_str(&mut self) -> Option<&str>

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

Tries to borrow the contents as &str, if possible without doing any allocations.

Implementors