pub struct PanicInfo<'a> { /* private fields */ }Expand description
A struct providing information about a panic.
PanicInfo structure is passed to a panic hook set by the set_hook
function.
Examples
use std::panic;
panic::set_hook(Box::new(|panic_info| {
if let Some(s) = panic_info.payload().downcast_ref::<&str>() {
println!("panic occurred: {:?}", s);
} else {
println!("panic occurred");
}
}));
panic!("Normal panic");Implementations
Returns the payload associated with the panic.
This will commonly, but not always, be a &'static str or String.
Examples
use std::panic;
panic::set_hook(Box::new(|panic_info| {
if let Some(s) = panic_info.payload().downcast_ref::<&str>() {
println!("panic occurred: {:?}", s);
} else {
println!("panic occurred");
}
}));
panic!("Normal panic");If the panic! macro from the core crate (not from std)
was used with a formatting string and some additional arguments,
returns that message ready to be used for example with fmt::write
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");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.