write

fmt2io

Function write 

Source 
pub fn write<R, W, F>(writer: W, f: F) -> Result<R>
where
    W: Write,
    F: FnOnce(&mut Writer<W>) -> Result<R, Error>,
Expand description

Converts given io::Writer to fmt::Writer.

The Writer is constructed from your writer which you can use to write UTF-8 data to. The function returns underlying io Error, if there has been one.

This function uses closure instead of directly exposing Writer in order to make error handling ergonomic/idiomatic.

See the crate-level documentation for an example.

§Panics

This function panics if writer didn’t return an error but you return Err from the closure. Return Ok(Err(YourError)) to handle your own error cases.