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@NAThompson NAThompson commented Jul 24, 2021

When using the doc-recommended syntax for the derivative of the interpolation I obtain a syntax error:

julia> sol(0.0,deriv=Val{1})
ERROR: MethodError: no method matching (::ODESolution{Float64, 1, Vector{Float64}, Nothing, Nothing, Vector{Float64}, Vector{Vector{Float64}}, ODEProblem{Float64, Tuple{Float64, Float64}, false, SciMLBase.NullParameters, ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, SciMLBase.StandardODEProblem}, Tsit5, OrdinaryDiffEq.InterpolationData{ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Vector{Float64}, Vector{Float64}, Vector{Vector{Float64}}, OrdinaryDiffEq.Tsit5ConstantCache{Float64, Float64}}, DiffEqBase.DEStats})(::Float64, ::Type{Val{0}}; deriv=Val{1})
Use square brackets [] for indexing an Array.
Closest candidates are:
  (::ODESolution)(::Any, ::Any, ::Type; idxs, continuity) at /Users/nathompson7/.julia/packages/SciMLBase/cU5k7/src/solutions/ode_solutions.jl:19 got unsupported keyword argument "deriv"
  (::ODESolution)(::Real, ::Any, ::AbstractVector{<:Integer}, ::Any) at /Users/nathompson7/.julia/packages/SciMLBase/cU5k7/src/solutions/ode_solutions.jl:32 got unsupported keyword argument "deriv"
  (::ODESolution)(::Real, ::Any, ::AbstractVector, ::Any) at /Users/nathompson7/.julia/packages/SciMLBase/cU5k7/src/solutions/ode_solutions.jl:55 got unsupported keyword argument "deriv"
  ...
Stacktrace:
 [1] kwerr(::NamedTuple{(:deriv,), Tuple{DataType}}, ::ODESolution{Float64, 1, Vector{Float64}, Nothing, Nothing, Vector{Float64}, Vector{Vector{Float64}}, ODEProblem{Float64, Tuple{Float64, Float64}, false, SciMLBase.NullParameters, ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, SciMLBase.StandardODEProblem}, Tsit5, OrdinaryDiffEq.InterpolationData{ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Vector{Float64}, Vector{Float64}, Vector{Vector{Float64}}, OrdinaryDiffEq.Tsit5ConstantCache{Float64, Float64}}, DiffEqBase.DEStats}, ::Float64, ::Type)
   @ Base ./error.jl:163
 [2] top-level scope
   @ REPL[20]:1

Removing the kwarg fixes the issue:

julia> sol(0.0,Val{1})
0.505

Extra information:

julia> VERSION
v"1.8.0-DEV.231"

When using the doc-recommended syntax for the derivative of the interpolation I obtain a syntax error:

```
julia> sol(0.0,deriv=Val{1})
ERROR: MethodError: no method matching (::ODESolution{Float64, 1, Vector{Float64}, Nothing, Nothing, Vector{Float64}, Vector{Vector{Float64}}, ODEProblem{Float64, Tuple{Float64, Float64}, false, SciMLBase.NullParameters, ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, SciMLBase.StandardODEProblem}, Tsit5, OrdinaryDiffEq.InterpolationData{ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Vector{Float64}, Vector{Float64}, Vector{Vector{Float64}}, OrdinaryDiffEq.Tsit5ConstantCache{Float64, Float64}}, DiffEqBase.DEStats})(::Float64, ::Type{Val{0}}; deriv=Val{1})
Use square brackets [] for indexing an Array.
Closest candidates are:
  (::ODESolution)(::Any, ::Any, ::Type; idxs, continuity) at /Users/nathompson7/.julia/packages/SciMLBase/cU5k7/src/solutions/ode_solutions.jl:19 got unsupported keyword argument "deriv"
  (::ODESolution)(::Real, ::Any, ::AbstractVector{<:Integer}, ::Any) at /Users/nathompson7/.julia/packages/SciMLBase/cU5k7/src/solutions/ode_solutions.jl:32 got unsupported keyword argument "deriv"
  (::ODESolution)(::Real, ::Any, ::AbstractVector, ::Any) at /Users/nathompson7/.julia/packages/SciMLBase/cU5k7/src/solutions/ode_solutions.jl:55 got unsupported keyword argument "deriv"
  ...
Stacktrace:
 [1] kwerr(::NamedTuple{(:deriv,), Tuple{DataType}}, ::ODESolution{Float64, 1, Vector{Float64}, Nothing, Nothing, Vector{Float64}, Vector{Vector{Float64}}, ODEProblem{Float64, Tuple{Float64, Float64}, false, SciMLBase.NullParameters, ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Base.Pairs{Symbol, Union{}, Tuple{}, NamedTuple{(), Tuple{}}}, SciMLBase.StandardODEProblem}, Tsit5, OrdinaryDiffEq.InterpolationData{ODEFunction{false, typeof(f), LinearAlgebra.UniformScaling{Bool}, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, typeof(SciMLBase.DEFAULT_OBSERVED), Nothing}, Vector{Float64}, Vector{Float64}, Vector{Vector{Float64}}, OrdinaryDiffEq.Tsit5ConstantCache{Float64, Float64}}, DiffEqBase.DEStats}, ::Float64, ::Type)
   @ Base ./error.jl:163
 [2] top-level scope
   @ REPL[20]:1
```

Removing the `kwarg` fixes the issue:

```
julia> sol(0.0,Val{1})
0.505
```
@NAThompson NAThompson changed the title kwarg appears to be a syntax error for derivative of interplant kwarg appears to be a syntax error for derivative of interpolant Jul 24, 2021
@@ -90,7 +90,7 @@ sol(t)
Note that the interpolating function allows for `t` to be a vector and uses this to speed up the interpolation calculations. The full API for the interpolations is

```julia
sol(t,deriv=Val{0};idxs=nothing,continuity=:left)
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that's not a kwarg: it's before the ;. That's an optional argument.

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Ok. However, does the syntax work for you?

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yes, sol(t,Val{0}) works

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