Re: [julia-users] Inheriting from Real works, from AbstractFloat does not?

2015-08-24 Thread Jeffrey Sarnoff 
thanks

On Monday, August 24, 2015 at 11:00:11 PM UTC-4, Jacob Quinn wrote:

 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 jeffrey...@gmail.com 
 javascript: 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.

Re: [julia-users] Inheriting from Real works, from AbstractFloat does not?

2015-08-24 Thread Jacob Quinn 
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 jeffrey.sarn...@gmail.com
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.

[julia-users] Inheriting from Real works, from AbstractFloat does not?

2015-08-24 Thread Jeffrey Sarnoff 
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.