Derive Macro Not 

#[derive(Not)]
{
    // Attributes available to this derive:
    #[not]
}

Implement Not for a structure.

Sample.

use derive_tools::Not;

#[ derive( Not ) ]
struct MyStruct( bool );

let my_struct = MyStruct( true );
dbg!( !my_struct );

To learn more about the feature, study the module derive_tools::Not.