Macro match_each_integer_pscalar_pair 

macro_rules! match_each_integer_pscalar_pair {
    (($left:expr, $right:expr), | $l:ident, $r:ident | $body:block, $else:block) => { ... };
}

Matches on pairs of integer PrimitiveScalar with the same type and executes the provided code.

This macro matches two primitive scalars when they have the same underlying integer type. For type mismatches, the $else block is executed.