> Hi Mauro , > > Can you show me any example ? > I am a beginner in Julia. It would of great help for me.
In Julia the number types are defined here: https://github.com/JuliaLang/julia/blob/fdbcdf78bf0106e609a8d83b9e896d2d11bae594/base/boot.jl#L156 So there are the abstract types: abstract Number abstract Real <: Number abstract AbstractFloat <: Real abstract Integer <: Real abstract Signed <: Integer abstract Unsigned <: Integer and then there are concrete subtypes. For example a few integer types: bitstype 8 Bool <: Integer bitstype 64 Int64 <: Signed bitstype 64 UInt64 <: Unsigned > On Tuesday, March 22, 2016 at 8:01:47 PM UTC+5:30, Mauro wrote: > > You can only inherit from abstract types. Also, first defining > > type number > ... > end > > and then > > abstract number > > is not possible. It cannot be both abstract and concrete. (Also note > that types are by convention Captialized). > > So build your hierarchy only with abstract types and make concrete types > of some of the abstract ones. > > On Tue, 2016-03-22 at 15:26, kunal singh <ks25...@gmail.com> wrote: > > So basically there is a type called Basic defined as follows > > > > type Basic > > ptr::Ptr{Void} > > function Basic() > > z = new(C_NULL) > > ccall((:basic_new_stack, :libsymengine), Void, (Ptr{Basic}, ), &z) > > finalizer(z, basic_free) > > return z > > end > > end > > > > Now I want to create a hierarchy: integer(not Integer)< number(not > Number) < > > Basic > > > > But in Julia, we cannot inherit from concrete type So what should I Do?? > > > > Here's My approach > > > > abstract Basic > > > > type number <: Basic > > ptr::Ptr{Void} > > function number() > > z = new(C_NULL) > > ccall((:basic_new_stack, :libsymengine), Void, (Ptr{Basic}, ), &z) > > finalizer(z, basic_free) > > return z > > end > > end > > > > abstract number > > > > type integer <: number > > ptr::Ptr{Void} > > function integer() > > z = new(C_NULL) > > ccall((:basic_new_stack, :libsymengine), Void, (Ptr{Basic}, ), &z) > > finalizer(z, basic_free) > > return z > > end > > end > > > > > > Please tell me if I am wrong ? > > Need help from
