Macro nes::try [−] [src]

macro_rules! try {
    ( $o:expr, $error:path ) => { ... };
    ( $o:expr, $error:path, $( $arg:expr ),* ) => { ... };
}

This macro looks like standard try!() macro but it gets information where the error has been occurred.

Note: if error, that you convert to other, contains ErrorInfo(is defined by define_error!() and is not like std::io::Error), you should use ?.

# Example

let file=try!( std::fs::File::open(file_name.as_str()), ReadFileError::ReadFileError, file_name );

match try!( buf_reader.read_line(&mut line), ReadFileError::IOError ) { ... }