Julia: bitstype: declare new concrete type

By using bitstype, you can define a concrete type with given number of bits in size.

Synatx

bitstype noOfBits newType

bitstype noOfBits  newType <: parentType

noOfBits: Number of bits of storage for given type. It should be multiple of 8.

newType: Name of the type

parentType: Specifies the parent type of given type

julia> bitstype 8 noOfDays  <: Integer

julia> show(x::noOfDays) = print("noOfDays($(reinterpret(Int32,x)))")
show (generic function with 1 method)

julia> reinterpret(noOfDays, Int8(123))
noOfDays(0x7b)

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