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use std::fmt::Debug;
use crate::LoggableError;
impl<T, E: Debug> LoggableError<T> for std::result::Result<T, E> {
fn print_error<F: Fn(&str)>(self, fun: F) -> Self {
if let Err(ref err) = self {
let msg = format!("ERROR: {err:#?}");
fun(&msg);
}
self
}
}
#[cfg(test)]
mod tests {
use crate::LoggableError;
use std::io;
#[test]
fn generic_std_result_is_error() {
let res: Result<(), io::Error> = Err(io::Error::new(io::ErrorKind::NotFound, "Test"));
assert!(res.to_stdout().is_err());
}
#[test]
fn generic_std_result_error_keeps_type() {
let res: Result<(), io::Error> = Err(io::Error::new(io::ErrorKind::NotFound, "Test"));
assert!(<dyn std::any::Any>::is::<Result<(), io::Error>>(&res.to_stdout()));
}
}