macro_rules! err { ( $msg : expr ) => { ... }; ( $msg : expr, $( $arg : expr ),+ $(,)? ) => { ... }; }
Expand description
Macro to generate an error descriptor.
Basic use-case.
fn f1() -> BasicError
{
return err!( "No attr" );
}
macro_rules! err { ( $msg : expr ) => { ... }; ( $msg : expr, $( $arg : expr ),+ $(,)? ) => { ... }; }
Macro to generate an error descriptor.
fn f1() -> BasicError
{
return err!( "No attr" );
}