{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
        // but exempt enums with unit ctors like C's (e.g. from rust-bindgen)
        // with an enum like `#[repr(u8)] enum Enum { A(DataA), B(DataB), }`
        if variant_has_complex_ctor(variant) {