Example of how Rust proc macros could have a shared context, so every macro crate is using the same metadata no matter in which order macros are expanded.

After a macro variable is created, you typically use the variable by referencing it with an ampersand preceding its name (&variable-name), which is called a macro variable reference. These references ...

This is an example Cisco Collaboration Device macro which improved audio in workspaces with Voice Lift/Sound Reinforcement and Ceiling Microphones by 'ducking' the Ceiling Microphones Gain/Level when ...