Function promote_dtype 

pub fn promote_dtype(lhs: DType, rhs: DType) -> DType

Promote two dtypes according to tenferro’s public dtype-promotion lattice.

Examples

use tenferro_tensor::validate::promote_dtype;
use tenferro_tensor::DType;

assert_eq!(promote_dtype(DType::I32, DType::F32), DType::F64);