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denizyuret / AutoGrad.jl

Julia port of the Python autograd package.
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ambiguity error in x^n #48

Closed CarloLucibello closed 6 years ago

CarloLucibello commented 6 years ago

when both x and n are integers:

julia> grad(x->x^3)(1)
ERROR: MethodError: ^(::AutoGrad.Rec{Int64}, ::Int64) is ambiguous. Candidates:
  ^(x, p::Integer) in Base at intfuncs.jl:199
  ^(x1::AutoGrad.Rec{##1045}, x2::##1046) where {##1045<:Number, ##1046<:Number} in AutoGrad
Possible fix, define
  ^(::AutoGrad.Rec{##1045<:Number}, ::Integer)
Stacktrace:
 [1] (::##13#14)(::AutoGrad.Rec{Int64}) at ./REPL[9]:1
 [2] forward_pass(::Function, ::Tuple{Int64}, ::Array{Any,1}, ::Int64) at /home/carlo/.julia/v0.6/AutoGrad/src/core.jl:88
 [3] (::AutoGrad.##gradfun#1#3{##13#14,Int64})(::Array{Any,1}, ::Function, ::Int64, ::Vararg{Int64,N} where N) at /home/carlo/.julia/v0.6/AutoGrad/src/core.jl:39
 [4] (::AutoGrad.#gradfun#2)(::Int64, ::Vararg{Int64,N} where N) at /home/carlo/.julia/v0.6/AutoGrad/src/core.jl:39
 [5] macro expansion at /home/carlo/.julia/v0.6/Revise/src/Revise.jl:775 [inlined]
 [6] (::Revise.##17#18{Base.REPL.REPLBackend})() at ./event.jl:73