Macro swc_core::ecma::visit::standard_only_visit_mut

macro_rules! standard_only_visit_mut {
    ($name:ident, $N:ident) => { ... };
    () => { ... };
}

Available on crate features __ecma and __visit only.

Mark visitor as ECMAScript standard only and mark other types as unreachable.

Used to reduce the binary size.