{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"//"}]}
            // `#[ffi_const]` functions cannot be `#[ffi_pure]`
        if find_attr!(attrs, AttributeKind::FfiConst(_)) {
            self.dcx().emit_err(errors::BothFfiConstAndPure { attr_span });