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#[macro_export]
macro_rules! with_match_primitive_type {(
    $key_type:expr, | $_:tt $T:ident | $($body:tt)*
) => ({
    macro_rules! __with_ty__ {( $_ $T:ident ) => ( $($body)* )}
    use $crate::datatypes::PrimitiveType::*;
    match $key_type {
        Int8 => __with_ty__! { i8 },
        Int16 => __with_ty__! { i16 },
        Int32 => __with_ty__! { i32 },
        Int64 => __with_ty__! { i64 },
        UInt8 => __with_ty__! { u8 },
        UInt16 => __with_ty__! { u16 },
        UInt32 => __with_ty__! { u32 },
        UInt64 => __with_ty__! { u64 },
        Float32 => __with_ty__! { f32 },
        Float64 => __with_ty__! { f64 },
        _ => panic!("operator does not support primitive `{:?}`",
            $key_type)
    }
})}

#[macro_export]
macro_rules! with_match_primitive_type_full {(
    $key_type:expr, | $_:tt $T:ident | $($body:tt)*
) => ({
    macro_rules! __with_ty__ {( $_ $T:ident ) => ( $($body)* )}
    use $crate::datatypes::PrimitiveType::*;
    use $crate::types::{f16};
    match $key_type {
        Int8 => __with_ty__! { i8 },
        Int16 => __with_ty__! { i16 },
        Int32 => __with_ty__! { i32 },
        Int64 => __with_ty__! { i64 },
        UInt8 => __with_ty__! { u8 },
        UInt16 => __with_ty__! { u16 },
        UInt32 => __with_ty__! { u32 },
        UInt64 => __with_ty__! { u64 },
        Int128 => __with_ty__! { i128 },
        Float16 => __with_ty__! { f16 },
        Float32 => __with_ty__! { f32 },
        Float64 => __with_ty__! { f64 },
        _ => panic!("operator does not support primitive `{:?}`",
            $key_type)
    }
})}

#[macro_export]
macro_rules! match_integer_type {(
    $key_type:expr, | $_:tt $T:ident | $($body:tt)*
) => ({
    macro_rules! __with_ty__ {( $_ $T:ident ) => ( $($body)* )}
    use $crate::datatypes::IntegerType::*;
    match $key_type {
        Int8 => __with_ty__! { i8 },
        Int16 => __with_ty__! { i16 },
        Int32 => __with_ty__! { i32 },
        Int64 => __with_ty__! { i64 },
        UInt8 => __with_ty__! { u8 },
        UInt16 => __with_ty__! { u16 },
        UInt32 => __with_ty__! { u32 },
        UInt64 => __with_ty__! { u64 },
    }
})}