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use std::fmt;

/// An error returned from the `proc_exit` host syscall.
///
/// Embedders can test if an error returned from wasm is this error, in which
/// case it may signal a non-fatal trap.
#[derive(Debug)]
pub struct I32Exit(pub i32);

impl fmt::Display for I32Exit {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "Exited with i32 exit status {}", self.0)
    }
}

impl std::error::Error for I32Exit {}