#[derive(Debug, PartialEq)]
pub struct DisconnectedError {
msg: &'static str,
}
impl DisconnectedError {
pub fn new() -> Self {
Self { msg: "given graph is not connected." }
}
}
impl std::fmt::Display for DisconnectedError {
fn fmt(
&self,
f: &mut std::fmt::Formatter,
) -> std::fmt::Result {
write!(f, "{}", self.msg)
}
}
impl std::error::Error for DisconnectedError {
fn description(&self) -> &str {
&self.msg
}
}