TypeParameterAccessors.jl

Support

TypeParameterAccessors.jl is supported by the Flatiron Institute, a division of the Simons Foundation.

Installation instructions

The package can be added as usual through the package manager:

julia> Pkg.add("TypeParameterAccessors")

Examples

using Test: @test
using TypeParameterAccessors

Get type parameters:

@test type_parameters(Array{Float64}, 1) == Float64
@test type_parameters(Matrix{Float64}, 2) == 2
@test type_parameters(Matrix{Float64}) == (Float64, 2)
@test type_parameters(Array{Float64}, eltype) == Float64
@test type_parameters(Matrix{Float64}, ndims) == 2
@test type_parameters(Matrix{Float64}, (eltype, ndims)) == (Float64, 2)

Set type parameters:

@test set_type_parameters(Array, 1, Float32) == Array{Float32}
@test set_type_parameters(Array, (1,), (Float32,)) == Array{Float32}
@test set_type_parameters(Array, (1, 2), (Float32, 2)) == Matrix{Float32}
@test set_type_parameters(Array, (eltype,), (Float32,)) == Array{Float32}
@test set_type_parameters(Array, (eltype, ndims), (Float32, 2)) == Matrix{Float32}

Specify type parameters:

@test specify_type_parameters(Array{Float64}, (eltype, ndims), (Float32, 2)) ==
  Matrix{Float64}
@test specify_type_parameters(Array{Float64}, ndims, 2) == Matrix{Float64}
@test specify_type_parameters(Array{Float64}, eltype, Float32) == Array{Float64}

Unspecify type parameters:

@test unspecify_type_parameters(Matrix{Float32}) == Array
@test unspecify_type_parameters(Matrix{Float32}, 1) == Matrix
@test unspecify_type_parameters(Matrix{Float32}, (eltype,)) == Matrix
@test unspecify_type_parameters(Matrix{Float32}, (ndims,)) == Array{Float32}

Getting default type parameters

@test default_type_parameters(Array) == (Float64, 1)
@test default_type_parameters(Array, eltype) == Float64
@test default_type_parameters(Array, 2) == 1
@test default_type_parameters(Array, (eltype, ndims)) == (Float64, 1)

Set default type parameters:

@test set_default_type_parameters(Array) == Vector{Float64}
@test set_default_type_parameters(Array, (eltype,)) == Array{Float64}
@test set_default_type_parameters(Array, 2) == Vector

Specify default type parameters:

@test specify_default_type_parameters(Matrix, (eltype, ndims)) == Matrix{Float64}
@test specify_default_type_parameters(Matrix, eltype) == Matrix{Float64}
@test specify_default_type_parameters(Array{Float32}, (eltype, ndims)) == Vector{Float32}

Other functionality:

• parenttype
• unwrap_array_type
• is_wrapped_array
• set_eltype
• set_ndims
• set_parenttype
• similartype

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