plot heatmap function gives a compile error when working on a variable from a global scope

[lwabeke]

See the code snippet below for a smallest reproducible case

using PlotlyJS
let
    var = randn(10,5)
    global function P1()
        lay = Layout(;title="Dummy1")
        plot( heatmap( z=var ), lay )
     end  # function
    
    global function P2()
        lay = Layout(;title="Dummy2")
        plot( heatmap( z=randn(10,5) ), lay )
     end  # function

end # let

P2() works fine, but calling P1() which is essentially the same, give a compile error:

error compiling P1: unsupported or misplaced expression "quote" in function P1

If I am doing something wrong, I cannot think what. I guess I can work around it, by copying the variable into a local variable, but still

Julia Version 0.5.0
Commit 3c9d753 (2016-09-19 18:14 UTC)
Platform Info:
System: Darwin (x86_64-apple-darwin13.4.0)
CPU: Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
WORD_SIZE: 64
BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Haswell)
LAPACK: libopenblas64_
LIBM: libopenlibm
LLVM: libLLVM-3.7.1 (ORCJIT, haswell)
In [48]:

Pkg.status()
19 required packages:
...

• PlotlyJS 0.5.2
  ...

[sglyon]

Hmm, this seems like more of a Julia issue rather than a PlotlyJS.jl issue.

See the example below

julia> f(;kwargs...) = Dict(kwargs)
f (generic function with 1 method)

julia> f(x=1, y=2)
Dict{Symbol,Int64} with 2 entries:
  :y => 2
  :x => 1

julia> let
       v = rand(5)

       global function g()
           f(myvar=v)
       end

       global function h()
           f(myvar=rand(5))
       end
       end
h (generic function with 1 method)

julia> g()
ERROR: error compiling g: unsupported or misplaced expression "quote" in function g

julia> h()
Dict{Symbol,Array{Float64,1}} with 1 entry:
  :myvar => [0.0102912,0.411641,0.0612579,0.630711,0.720062]

If you do a little digging you can see what the problem is:

julia> m1 = methods(P1).ms[1]
P1() at REPL[41]:4

julia> m2 = methods(P2).ms[1]
P2() at REPL[41]:9

julia> m1.lambda_template
LambdaInfo template for P1() at REPL[41]:4
:(begin
        nothing
        lay = ((Core.kwfunc)(Main.Layout))((Base.vector_any)(:title,"Dummy1"),Main.Layout) # line 5:
        return (Main.plot)(((Core.kwfunc)(Main.heatmap))((Base.vector_any)(:z,$(QuoteNode([0.0719331 -0.235815 … 0.104974 1.09685; 0.473269 -0.432309 … -0.495483 -1.04663; … ; 0.0528695 0.285481 … -0.93711 -1.08406; 0.513901 -1.82477 … -2.06176 1.1875]))),Main.heatmap),lay)
    end)

julia> m2.lambda_template
LambdaInfo template for P2() at REPL[41]:9
:(begin
        nothing
        lay = ((Core.kwfunc)(Main.Layout))((Base.vector_any)(:title,"Dummy2"),Main.Layout) # line 10:
        return (Main.plot)(((Core.kwfunc)(Main.heatmap))((Base.vector_any)(:z,(Main.randn)(10,5)),Main.heatmap),lay)
    end)

Notice that in m1.lambda_template you have the random matrix var input as a QuoteNode. This is why the error talks about a misplaced quote.

I don't think there is anything for me to do on this as it seems to be an issue with scoping and keyword arguments -- which are Julia problems. I recommend posting over at the julia discussion page and seeing if you get more help there.