Add boilerplate outer constrcutors to EossParams

[singularitti]

In the past I used to add outer constructors using eval-quote to types that are concrete subtypes of a type, that was slow to load and a bit o f ugly. Or I can list all concrete subtypes by hand, it's maybe a bit faster but it requires manual updating.

[singularitti]

But now I found I could just write

(::Type{T})(arr::AbstractVector) where {T<:EossParam} = T{eltype(arr)}(arr...)
(::Type{T})(args...) where {T<:EossParam} = T([args...])

and it works!

julia> BirchMurnaghan3rd(1,2,3.0)
BirchMurnaghan3rd{Float64}
 v0 = 1.0
 b0 = 2.0
 b′0 = 3.0
 e0 = 0.0


julia> BirchMurnaghan3rd([1,2,3.0])
BirchMurnaghan3rd{Float64}
 v0 = 1.0
 b0 = 2.0
 b′0 = 3.0
 e0 = 0.0

No need to rely on eval, ConstructionBase.constructorof and dispatch on abstract types! And it works fine on Julia 1.0!

Also, there is no type-piracy on Type:

julia> methods(Type)
# 0 methods for generic function "(::Type)":

julia> methods(EossParam)
# 2 methods for generic function "(::Type)":
[1] (::Type{T})(arr::AbstractArray{T,1} where T) where T<:EossParam in EquationsOfStateOfSolids.Collections at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:230
[2] (::Type{T})(args...) where T<:EossParam in EquationsOfStateOfSolids.Collections at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:231

And directly call on EossParam will error as expected:

julia> EossParam(1,2,3)
ERROR: TypeError: in Type{...} expression, expected UnionAll, got Type{EossParam{Int64}}
Stacktrace:
 [1] EossParam{Int64}(::Array{Int64,1}) at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:230
 [2] EossParam{Int64}(::Int64, ::Vararg{Int64,N} where N) at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:231
 [3] EossParam(::Array{Int64,1}) at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:230
 [4] EossParam(::Int64, ::Vararg{Int64,N} where N) at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:231
 [5] top-level scope at none:0

julia> EossParam([1,2,3])
ERROR: TypeError: in Type{...} expression, expected UnionAll, got Type{EossParam{Int64}}
Stacktrace:
 [1] EossParam{Int64}(::Array{Int64,1}) at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:230
 [2] EossParam{Int64}(::Int64, ::Vararg{Int64,N} where N) at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:231
 [3] EossParam(::Array{Int64,1}) at ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:230
 [4] top-level scope at none:0

julia> FiniteStrainEossParam(1,2,3)
ERROR: TypeError: in Type{...} expression, expected UnionAll, got Type{FiniteStrainEossParam{Int64,Int64}}
...

julia> FiniteStrainEossParam([1,2,3])
ERROR: TypeError: in Type{...} expression, expected UnionAll, got Type{FiniteStrainEossParam{Int64,Int64}

And it's fast, complete and no repetition of code!

julia> methods(BirchMurnaghan3rd{Int})
# 4 methods for type constructor:
[1] BirchMurnaghan3rd(v0, b0, b′0) where T
 @ EquationsOfStateOfSolids.Collections ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:46
[2] BirchMurnaghan3rd(v0, b0, b′0, e0) where T
 @ EquationsOfStateOfSolids.Collections ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:46
[3] EossParam(arr::AbstractArray{T,1} where T) where T<:EquationsOfStateOfSolids.Collections.EossParam
 @ EquationsOfStateOfSolids.Collections ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:257
[4] EossParam(args...) where T<:EquationsOfStateOfSolids.Collections.EossParam
 @ EquationsOfStateOfSolids.Collections ~/.julia/dev/EquationsOfStateOfSolids/src/Collections.jl:258