Macro std::prelude::panic

Re-export from std::panicking::panic

macro panic($reason, $args/* ... */) { ... }

source

Ungracefully terminate the thread or process with an error message.

Use this macro to bail on conditions that the program cannot reasonably be expected to recover from (e.g. when a condition means a certain programming bug).

Since panics usually cannot be recovered from, prefer to use structured error handling as a general purpose failure handling mechanism.

Panicking in Alumina does not perform any stack unwinding.

See also spawn for details on how panics are handled in a multithreaded program.

When compiled in debug mode, panic prints the provided message along with the stack trace (on platforms that support it)

Example

let value = 42;
switch value % 2 {
    0 => println!("even"),
    1 => println!("odd"),
    _ => panic!("{} is somehow neither odd nor even", value),
}
Run this example

Expressions that unconditionally panic have a never type.