Macro match_each_pscalar 

macro_rules! match_each_pscalar {
    ($self:expr, | $scalar:ident | $body:block) => { ... };
}

Matches on all primitive type variants of PrimitiveScalar and executes the same code for each variant branch.

This macro eliminates repetitive match statements when implementing operations that need to work uniformly across all primitive type variants (U8, U16, U32, U64, I8, I16, I32, I64, F16, F32, F64).

Works with both owned PrimitiveScalar and &PrimitiveScalar (the bound variable will be PScalar<T> or &PScalar<T> respectively due to Rust’s match ergonomics).