document the try_send_error!() macro

master
rasul 5 years ago
parent 3619302f34
commit 4d526f9df9

@ -66,7 +66,28 @@ macro_rules! try_print {
}; };
} }
/// Unwrap a `Result<T, E>`, if it's an error then let client know and return. /// Unwrap a Result. If it's Err then print the error and return a generic
/// error message for the client.
///
/// # Arguments
///
/// * `$i:ident` : mio::Token to designate the client
/// * `$e:expr` : Expression to evaluate, must return `Result<T, Box<dyn Error>>`
///
/// # Example
///
/// ```
/// use std::fs::File;
/// use mio::Token;
/// use rude::result::RudeResult;
/// use rude::try_send_error;
///
/// fn main() -> RudeResult<()> {
/// let token = Token(12);
/// let file = try_send_error!(token, File::open(file!()));
/// Ok(())
/// }
/// ```
#[macro_export] #[macro_export]
macro_rules! try_send_error { macro_rules! try_send_error {
($i:ident, $e:expr) => { ($i:ident, $e:expr) => {

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