- u8? objprocedure
- s8? objprocedure
- u16? objprocedure
- s16? objprocedure
- u32? objprocedure
- s32? objprocedure
- u64? objprocedure
- s64? objprocedure
- f32? objprocedure
- f64? objprocedure
- c64? objprocedure
- c128? objprocedure
Returns #t if obj is a valid element of an @vector, and #f otherwise.