07 04 numeric types

Many P4 operations are restrained to expressions that evaluate to numeric values. Such expressions must have one of the following numeric types:

• int - an arbitrary-precision integer (section Arbitrary-precision integers)
• bit<W> - a W-bit unsigned integer where W >= 0 (section Unsigned integers (bit-strings))
• int<W> - a W-bit signed integer where W >= 1 (section Signed Integers)
• a serializable enum with an underlying type that is bit<W> or int<W> (section Enumeration types).