When you subtype AbstractFloat, it's going to try to use the `grisu.jl` code to do the showing. The grisu code has all sorts of requirements to work, most of it semi-hard-coded for Float16, Float32, and Float64. Your best bet would probably be to define
Base.show(io::IO, x::SubtypeAbsFloat) = show(io, x.val) On Mon, Aug 24, 2015 at 8:56 PM, Jeffrey Sarnoff <[email protected]> wrote: > julia> immutable SubtypeReal <: Real > val::Float64 > end > > julia> a=SubtypeReal(5.0) > SubtypeReal(5.0) > > julia> immutable SubtypeAbsFloat <: AbstractFloat > val::Float64 > end > > julia> a=SubtypeAbsFloat(5.0) > Error showing value of type SubtypeAbsFloat: > ERROR: - not defined for SubtypeAbsFloat > in _show at grisu.jl:64 > in show at grisu.jl:119 > ... > in run_repl at ./REPL.jl:166 > in _start at ./client.jl:453 > > Defining show for it does not help. > >
