Struct PanicInfo 

pub struct PanicInfo<'a> { /* private fields */ }

A struct providing information about a panic.

A PanicInfo structure is passed to the panic handler defined by #[panic_handler].

For the type used by the panic hook mechanism in std, see std::panic::PanicHookInfo.

Implementations

impl<'a> PanicInfo<'a>

pub fn message(&self) -> PanicMessage<'_>

The message that was given to the panic! macro.

Example

The type returned by this method implements Display, so it can be passed directly to write!() and similar macros.

#[panic_handler]
fn panic_handler(panic_info: &PanicInfo<'_>) -> ! {
    write!(DEBUG_OUTPUT, "panicked: {}", panic_info.message());
    loop {}
}

pub fn location(&self) -> Option<&Location<'_>>

Returns information about the location from which the panic originated, if available.

This method will currently always return Some, but this may change in future versions.

Examples

use std::panic;

panic::set_hook(Box::new(|panic_info| {
    if let Some(location) = panic_info.location() {
        println!("panic occurred in file '{}' at line {}",
            location.file(),
            location.line(),
        );
    } else {
        println!("panic occurred but can't get location information...");
    }
}));

panic!("Normal panic");