Add conversion for tuples

src/mxarray.jl

@@ -289,7 +289,7 @@ function mxarray(a::AbstractArray{T}) where {T<:MxRealNum}
     return mx
 end
 
-function mxarray(a::AbstractArray{T}) where {T<:MxComplexNum}
+function mxarray(a::AbstractArray{T}) where {T <: MxComplexNum}
     mx = mxarray(T, size(a))
     na = length(a)
     rdat = unsafe_wrap(Array, real_ptr(mx), na)
@@ -302,6 +302,36 @@ function mxarray(a::AbstractArray{T}) where {T<:MxComplexNum}
 end
 
 
+function mxarray(a::NTuple{N, T}) where {N, T <: MxRealNum}
+    mx = mxarray(T, N)
+    pdat = ccall(mx_get_data[], Ptr{T}, (Ptr{Cvoid},), mx)
+    dat = unsafe_wrap(Array, pdat, N)
+    for i in 1:N
+        dat[i] = a[i]
+    end
+    return mx
+end
+
+function mxarray(a::NTuple{N, T}) where {N, T <: MxComplexNum}
+    mx = mxarray(T, size(a))
+    na = length(a)
+    rdat = unsafe_wrap(Array, real_ptr(mx), na)
+    idat = unsafe_wrap(Array, imag_ptr(mx), na)
+    for (i, ix) in enumerate(eachindex(a))
+        rdat[i] = real(a[ix])
+        idat[i] = imag(a[ix])
+    end
+    return mx
+end
+
+function mxarray(a::Tuple)
+    mx = mxcellarray(length(a))
+    for i in 1:length(a)
+        set_cell(mx, i, mxarray(a[i]))
+    end
+    return mx
+end
+
 # sparse matrix
 
 function mxsparse(ty::Type{Float64}, m::Integer, n::Integer, nzmax::Integer)

test/mxarray.jl

@@ -405,6 +405,28 @@ delete(x)
 @test isa(y, Array{Bool,3})
 @test isequal(y, a)
 
+# Issue: Tuples converted to MATLAB structs
+# https://github.com/JuliaInterop/MATLAB.jl/issues/178
+a = (2.5, 2.6)
+x = mxarray(a)
+y = jvalue(x)
+@test classid(x) == MATLAB.mxDOUBLE_CLASS
+@test nrows(x) == 2
+@test ncols(x) == 1
+delete(x)
+@test isa(y, Vector{Float64})
+@test isequal(y, collect(a))
+
+# Tuple with mixed types
+a = (1, 2.0, "MATLAB", [1, 2, 3])
+x = mxarray(a)
+y = jvalue(x)
+@test nrows(x) == 4
+@test ncols(x) == 1
+@test classid(x) == MATLAB.mxCELL_CLASS
+@test isa(y, Vector{Any})
+@test length(y) == length(a)
+@test isequal(y, collect(a))
 
 
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