PanicInfo in core::panic - Rust (original) (raw)
Struct PanicInfo
1.41.0 · Source
pub struct PanicInfo<'a> { /* private fields */ }Expand description
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.
1.81.0 · Source
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 {}
}1.10.0 · Source
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");1.10.0 · Source
👎Deprecated since 1.81.0: this never returns anything useful
🔬This is a nightly-only experimental API. (panic_can_unwind #92988)
Returns whether the panic handler is allowed to unwind the stack from the point where the panic occurred.
This is true for most kinds of panics with the exception of panics caused by trying to unwind out of a Drop implementation or a function whose ABI does not support unwinding.
It is safe for a panic handler to unwind even when this function returns false, however this will simply cause the panic handler to be called again.