Merge pull request #69 from MSeeker1340/scalar

Conversion to Number for DiffEqScalar

Author: ChrisRackauckas

src/basic_operators.jl

@@ -33,6 +33,7 @@ mutable struct DiffEqScalar{T<:Number,F} <: AbstractDiffEqLinearOperator{T}
     new{T,typeof(update_func)}(val, update_func)
 end
 
+convert(::Type{Number}, α::DiffEqScalar) = α.val
 size(::DiffEqScalar) = ()
 size(::DiffEqScalar, ::Integer) = 1
 update_coefficients!(α::DiffEqScalar,u,p,t) = (α.val = α.update_func(α.val,u,p,t); α)

test/basic_operators_interface.jl

@@ -12,6 +12,7 @@ end
 @testset "Scalar Operators" begin
   u = [1.0, 2.0]; u2 = [1.0, 2.0]
   α = DiffEqScalar(2.0)
+  @test convert(Number, α) == 2.0
   @test α * u == 2.0u
   lmul!(α, u2); @test u2 == 2.0u
   @test size(α) == ()