{"ast_node_type":"other","tokens":[{"end":2,"kind":"keyword","start":0,"text":"or"}]}
or
[`std::f32::consts`](https://doc.rust-lang.org/stable/std/f32/consts/#constants)
[`std::f64::consts`](https://doc.rust-lang.org/stable/std/f64/consts/#constants),