Macro ctx

macro_rules! ctx {
    () => { ... };
    ($process_and_influence:literal) => { ... };
    ($process_and_influence:literal:$reason:expr) => { ... };
    ($process_and_influence:literal, $($value:expr),*) => { ... };
    ($($value:expr),*) => { ... };
    ($process_and_influence:literal:$reason:expr, $($value:expr),*) => { ... };
}