rename differentials (#162)

* ignore dev

* bump version, compat

* rename DoesNotExist

* rename Composite to Tangent

* rename Zero to ZeroTangent

* update docs

* docs manifest

* Update docs/Project.toml

Co-authored-by: Lyndon White <oxinabox@ucc.asn.au>

Co-authored-by: Lyndon White <oxinabox@ucc.asn.au>

.gitignore

@@ -2,6 +2,7 @@
 *.jl.*.cov
 *.jl.mem
 /Manifest.toml
+dev/
 
 # Docs:
 docs/build/

Project.toml

@@ -1,6 +1,6 @@
 name = "FiniteDifferences"
 uuid = "26cc04aa-876d-5657-8c51-4c34ba976000"
-version = "0.12.6"
+version = "0.12.7"
 
 [deps]
 ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
@@ -11,7 +11,7 @@ Richardson = "708f8203-808e-40c0-ba2d-98a6953ed40d"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 
 [compat]
-ChainRulesCore = "0.9"
+ChainRulesCore = "0.9.44"
 Richardson = "1.2"
 StaticArrays = "0.12, 1.0"
 julia = "1"

docs/Manifest.toml

@@ -1,39 +1,59 @@
 # This file is machine-generated - editing it directly is not advised
 
+[[ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+
+[[Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
 [[Base64]]
 uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
 [[ChainRulesCore]]
-deps = ["LinearAlgebra", "MuladdMacro", "SparseArrays"]
-git-tree-sha1 = "15081c431bb25848ad9b0d172a65794f3a3e197a"
+deps = ["Compat", "LinearAlgebra", "SparseArrays"]
+git-tree-sha1 = "b391f22252b8754f4440de1f37ece49d8a7314bb"
 uuid = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
-version = "0.9.24"
+version = "0.9.44"
+
+[[Compat]]
+deps = ["Base64", "Dates", "DelimitedFiles", "Distributed", "InteractiveUtils", "LibGit2", "Libdl", "LinearAlgebra", "Markdown", "Mmap", "Pkg", "Printf", "REPL", "Random", "SHA", "Serialization", "SharedArrays", "Sockets", "SparseArrays", "Statistics", "Test", "UUIDs", "Unicode"]
+git-tree-sha1 = "e4e2b39db08f967cc1360951f01e8a75ec441cab"
+uuid = "34da2185-b29b-5c13-b0c7-acf172513d20"
+version = "3.30.0"
 
 [[Dates]]
 deps = ["Printf"]
 uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
 
+[[DelimitedFiles]]
+deps = ["Mmap"]
+uuid = "8bb1440f-4735-579b-a4ab-409b98df4dab"
+
 [[Distributed]]
 deps = ["Random", "Serialization", "Sockets"]
 uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
 
 [[DocStringExtensions]]
 deps = ["LibGit2", "Markdown", "Pkg", "Test"]
-git-tree-sha1 = "50ddf44c53698f5e784bbebb3f4b21c5807401b1"
+git-tree-sha1 = "9d4f64f79012636741cf01133158a54b24924c32"
 uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
-version = "0.8.3"
+version = "0.8.4"
 
 [[Documenter]]
 deps = ["Base64", "Dates", "DocStringExtensions", "IOCapture", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
 git-tree-sha1 = "a4875e0763112d6d017126f3944f4133abb342ae"
 uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 version = "0.25.5"
 
+[[Downloads]]
+deps = ["ArgTools", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+
 [[FiniteDifferences]]
 deps = ["ChainRulesCore", "LinearAlgebra", "Printf", "Random", "Richardson", "StaticArrays"]
 path = ".."
 uuid = "26cc04aa-876d-5657-8c51-4c34ba976000"
-version = "0.11.5"
+version = "0.12.7"
 
 [[IOCapture]]
 deps = ["Logging"]
@@ -51,10 +71,22 @@ git-tree-sha1 = "81690084b6198a2e1da36fcfda16eeca9f9f24e4"
 uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 version = "0.21.1"
 
+[[LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+
+[[LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+
 [[LibGit2]]
-deps = ["Printf"]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
 uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
 
+[[LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+
 [[Libdl]]
 uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
 
@@ -69,30 +101,35 @@ uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
 deps = ["Base64"]
 uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
 
+[[MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+
 [[Mmap]]
 uuid = "a63ad114-7e13-5084-954f-fe012c677804"
 
-[[MuladdMacro]]
-git-tree-sha1 = "c6190f9a7fc5d9d5915ab29f2134421b12d24a68"
-uuid = "46d2c3a1-f734-5fdb-9937-b9b9aeba4221"
-version = "0.2.2"
+[[MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+
+[[NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
 
 [[Parsers]]
 deps = ["Dates"]
-git-tree-sha1 = "50c9a9ed8c714945e01cd53a21007ed3865ed714"
+git-tree-sha1 = "c8abc88faa3f7a3950832ac5d6e690881590d6dc"
 uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
-version = "1.0.15"
+version = "1.1.0"
 
 [[Pkg]]
-deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
+deps = ["Artifacts", "Dates", "Downloads", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
 uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 
 [[Printf]]
 deps = ["Unicode"]
 uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 
 [[REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets"]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
 uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
 [[Random]]
@@ -111,6 +148,10 @@ uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
 [[Serialization]]
 uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 
+[[SharedArrays]]
+deps = ["Distributed", "Mmap", "Random", "Serialization"]
+uuid = "1a1011a3-84de-559e-8e89-a11a2f7dc383"
+
 [[Sockets]]
 uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
 
@@ -120,16 +161,24 @@ uuid = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 
 [[StaticArrays]]
 deps = ["LinearAlgebra", "Random", "Statistics"]
-git-tree-sha1 = "9da72ed50e94dbff92036da395275ed114e04d49"
+git-tree-sha1 = "c635017268fd51ed944ec429bcc4ad010bcea900"
 uuid = "90137ffa-7385-5640-81b9-e52037218182"
-version = "1.0.1"
+version = "1.2.0"
 
 [[Statistics]]
 deps = ["LinearAlgebra", "SparseArrays"]
 uuid = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
+[[TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+
+[[Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+
 [[Test]]
-deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
 uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [[UUIDs]]
@@ -138,3 +187,15 @@ uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 
 [[Unicode]]
 uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+
+[[nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+
+[[p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"

src/difference.jl

@@ -11,21 +11,21 @@ If `(y - x) / ε` is defined, then this operation is equivalent to doing that. F
 where these operations aren't defined, `difference` can still be defined without commiting
 type piracy while `-` and `/` cannot.
 """
-difference(::Real, ::T, ::T) where {T<:Symbol} = DoesNotExist()
-difference(::Real, ::T, ::T) where {T<:AbstractChar} = DoesNotExist()
-difference(::Real, ::T, ::T) where {T<:AbstractString} = DoesNotExist()
-difference(::Real, ::T, ::T) where {T<:Integer} = DoesNotExist()
+difference(::Real, ::T, ::T) where {T<:Symbol} = NoTangent()
+difference(::Real, ::T, ::T) where {T<:AbstractChar} = NoTangent()
+difference(::Real, ::T, ::T) where {T<:AbstractString} = NoTangent()
+difference(::Real, ::T, ::T) where {T<:Integer} = NoTangent()
 
 difference(ε::Real, y::T, x::T) where {T<:Number} = (y - x) / ε
 
 difference(ε::Real, y::T, x::T) where {T<:StridedArray} = difference.(ε, y, x)
 
 function difference(ε::Real, y::T, x::T) where {T<:Tuple}
-    return Composite{T}(difference.(ε, y, x)...)
+    return Tangent{T}(difference.(ε, y, x)...)
 end
 
 function difference(ε::Real, ys::T, xs::T) where {T<:NamedTuple}
-    return Composite{T}(; map((y, x) -> difference(ε, y, x), ys, xs)...)
+    return Tangent{T}(; map((y, x) -> difference(ε, y, x), ys, xs)...)
 end
 
 function difference(ε::Real, y::T, x::T) where {T}
@@ -38,7 +38,7 @@ function difference(ε::Real, y::T, x::T) where {T}
         tangents = map(field_names) do field_name
             difference(ε, getfield(y, field_name), getfield(x, field_name))
         end
-        return Composite{T}(; NamedTuple{field_names}(tangents)...)
+        return Tangent{T}(; NamedTuple{field_names}(tangents)...)
     else
         return NO_FIELDS
     end

src/rand_tangent.jl

@@ -5,11 +5,11 @@ Returns a randomly generated tangent vector appropriate for the primal value `x`
 """
 rand_tangent(x) = rand_tangent(Random.GLOBAL_RNG, x)
 
-rand_tangent(rng::AbstractRNG, x::Symbol) = DoesNotExist()
-rand_tangent(rng::AbstractRNG, x::AbstractChar) = DoesNotExist()
-rand_tangent(rng::AbstractRNG, x::AbstractString) = DoesNotExist()
+rand_tangent(rng::AbstractRNG, x::Symbol) = NoTangent()
+rand_tangent(rng::AbstractRNG, x::AbstractChar) = NoTangent()
+rand_tangent(rng::AbstractRNG, x::AbstractString) = NoTangent()
 
-rand_tangent(rng::AbstractRNG, x::Integer) = DoesNotExist()
+rand_tangent(rng::AbstractRNG, x::Integer) = NoTangent()
 
 rand_tangent(rng::AbstractRNG, x::T) where {T<:Number} = randn(rng, T)
 
@@ -20,11 +20,11 @@ rand_tangent(rng::AbstractRNG, ::BigFloat) = big(randn(rng))
 rand_tangent(rng::AbstractRNG, x::StridedArray) = rand_tangent.(Ref(rng), x)
 
 function rand_tangent(rng::AbstractRNG, x::T) where {T<:Tuple}
-    return Composite{T}(rand_tangent.(Ref(rng), x)...)
+    return Tangent{T}(rand_tangent.(Ref(rng), x)...)
 end
 
 function rand_tangent(rng::AbstractRNG, xs::T) where {T<:NamedTuple}
-    return Composite{T}(; map(x -> rand_tangent(rng, x), xs)...)
+    return Tangent{T}(; map(x -> rand_tangent(rng, x), xs)...)
 end
 
 function rand_tangent(rng::AbstractRNG, x::T) where {T}
@@ -37,11 +37,11 @@ function rand_tangent(rng::AbstractRNG, x::T) where {T}
         tangents = map(field_names) do field_name
             rand_tangent(rng, getfield(x, field_name))
         end
-        if all(tangent isa DoesNotExist for tangent in tangents)
+        if all(tangent isa NoTangent for tangent in tangents)
             # if none of my fields can be perturbed then I can't be perturbed
-            return DoesNotExist()
+            return NoTangent()
         else
-            Composite{T}(; NamedTuple{field_names}(tangents)...)
+            Tangent{T}(; NamedTuple{field_names}(tangents)...)
         end
     else
         return NO_FIELDS

src/to_vec.jl

@@ -176,15 +176,15 @@ end
 
 
 # ChainRulesCore Differentials
-function FiniteDifferences.to_vec(x::Composite{P}) where{P}
+function FiniteDifferences.to_vec(x::Tangent{P}) where{P}
     x_canon = canonicalize(x)  # to be safe, fill in every field and put in primal order.
     x_inner = ChainRulesCore.backing(x_canon)
     x_vec, back_inner = FiniteDifferences.to_vec(x_inner)
-    function Composite_from_vec(y_vec)
+    function Tangent_from_vec(y_vec)
         y_back = back_inner(y_vec)
-        return Composite{P, typeof(y_back)}(y_back)
+        return Tangent{P, typeof(y_back)}(y_back)
     end
-    return x_vec, Composite_from_vec
+    return x_vec, Tangent_from_vec
 end
 
 function FiniteDifferences.to_vec(x::AbstractZero)