Initial LogExpFunctions commit.

This is a straightforward copy from StatsFuns.jl.

.codecov.yml

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+comment: false

.github/workflows/CI.yml

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+# from https://discourse.julialang.org/t/easy-workflow-file-for-setting-up-github-actions-ci-for-your-julia-package/49765
+
+name: CI
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+    tags: '*'
+jobs:
+  test:
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - '1.0' # Replace this with the minimum Julia version that your package supports. E.g. if your package requires Julia 1.5 or higher, change this to '1.5'.
+          - '1' # Leave this line unchanged. '1' will automatically expand to the latest stable 1.x release of Julia.
+          - 'nightly'
+        os:
+          - ubuntu-latest
+        arch:
+          - x64
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - uses: actions/cache@v1
+        env:
+          cache-name: cache-artifacts
+        with:
+          path: ~/.julia/artifacts
+          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
+          restore-keys: |
+            ${{ runner.os }}-test-${{ env.cache-name }}-
+            ${{ runner.os }}-test-
+            ${{ runner.os }}-
+      - uses: julia-actions/julia-buildpkg@v1
+      - uses: julia-actions/julia-runtest@v1
+      - uses: julia-actions/julia-processcoverage@v1
+      - uses: codecov/codecov-action@v1
+        with:
+          file: lcov.info
+  docs:
+    name: Documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: '1'
+      - run: |
+          julia --project=docs -e '
+            using Pkg
+            Pkg.develop(PackageSpec(path=pwd()))
+            Pkg.instantiate()'
+      - run: |
+          julia --project=docs -e '
+            using Documenter: doctest
+            using LogExpFunctions
+            doctest(LogExpFunctions)'
+      - run: julia --project=docs docs/make.jl
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}

.github/workflows/CompatHelper.yml

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+# see the docs at https://github.com/JuliaRegistries/CompatHelper.jl
+
+name: CompatHelper
+
+on:
+  schedule:
+    - cron: '00 00 * * *'
+  workflow_dispatch:
+
+jobs:
+  CompatHelper:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        julia-version: [1.2.0]
+        julia-arch: [x86]
+        os: [ubuntu-latest]
+    steps:
+      - name: Pkg.add("CompatHelper")
+        run: julia -e 'using Pkg; Pkg.add("CompatHelper")'
+      - name: CompatHelper.main()
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: julia -e 'using CompatHelper; CompatHelper.main()'

.github/workflows/TagBot.yml

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+# see the docs at https://github.com/JuliaRegistries/TagBot
+
+name: TagBot
+on:
+  issue_comment:
+    types:
+      - created
+  workflow_dispatch:
+jobs:
+  TagBot:
+    if: github.event_name == 'workflow_dispatch' || github.actor == 'JuliaTagBot'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: JuliaRegistries/TagBot@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          ssh: ${{ secrets.DOCUMENTER_KEY }}

.gitignore

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+*.jl.cov
+*.jl.*.cov
+*.jl.mem
+/Manifest.toml
+/deps/deps.jl
+/docs/build
+/docs/Manifest.toml
+/test/coverage/Manifest.toml

LICENSE.md

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+The LogExpFunctions.jl package is licensed under the MIT "Expat" License:
+
+> Original work Copyright (c) 2015: Dahua Lin, StatsFuns.jl contributors.
+> Modified version Copyright (c) 2019: Tamas K. Papp.
+>
+> Permission is hereby granted, free of charge, to any person obtaining a copy
+> of this software and associated documentation files (the "Software"), to deal
+> in the Software without restriction, including without limitation the rights
+> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+> copies of the Software, and to permit persons to whom the Software is
+> furnished to do so, subject to the following conditions:
+>
+> The above copyright notice and this permission notice shall be included in all
+> copies or substantial portions of the Software.
+>
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+> SOFTWARE.
+>

Project.toml

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+name = "LogExpFunctions"
+uuid = "2ab3a3ac-af41-5b50-aa03-7779005ae688"
+authors = ["StatsFun.jl contributors, Tamas K. Papp <tkpapp@gmail.com>"]
+version = "0.1.1"
+
+[deps]
+DocStringExtensions = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
+
+[compat]
+julia = "^1"
+
+[extras]
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[targets]
+test = ["Test"]

README.md

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+# LogExpFunctions.jl
+
+![Lifecycle](https://img.shields.io/badge/lifecycle-experimental-orange.svg)
+[![build](https://github.com/tpapp/LogExpFunctions.jl/workflows/CI/badge.svg)](https://github.com/tpapp/LogExpFunctions.jl/actions?query=workflow%3ACI)
+[![codecov.io](http://codecov.io/github/tpapp/LogExpFunctions.jl/coverage.svg?branch=master)](http://codecov.io/github/tpapp/LogExpFunctions.jl?branch=master)
+[![Documentation](https://img.shields.io/badge/docs-stable-blue.svg)](https://tpapp.github.io/LogExpFunctions.jl/stable) [![Documentation](https://img.shields.io/badge/docs-master-blue.svg)](https://tpapp.github.io/LogExpFunctions.jl/latest)
+
+Various special functions based on `log` and `exp` moved from [StatsFuns.jl](https://github.com/JuliaStats/StatsFuns.jl) into a separate package, to minimize dependencies. These functions only use native Julia code, so there is no need to depend on `librmath` or similar libraries. See the discussion at [StatsFuns.jl#46](https://github.com/JuliaStats/StatsFuns.jl/issues/46).
+
+The original authors of these functions are the StatsFuns.jl contributors.

docs/Manifest.toml

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+# This file is machine-generated - editing it directly is not advised
+
+[[Base64]]
+uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
+
+[[Dates]]
+deps = ["Printf"]
+uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
+
+[[Distributed]]
+deps = ["Random", "Serialization", "Sockets"]
+uuid = "8ba89e20-285c-5b6f-9357-94700520ee1b"
+
+[[DocStringExtensions]]
+deps = ["LibGit2", "Markdown", "Pkg", "Test"]
+git-tree-sha1 = "0513f1a8991e9d83255e0140aace0d0fc4486600"
+uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
+version = "0.8.0"
+
+[[Documenter]]
+deps = ["Base64", "DocStringExtensions", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
+git-tree-sha1 = "1b6ae3796f60311e39cd1770566140d2c056e87f"
+uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+version = "0.23.3"
+
+[[InteractiveUtils]]
+deps = ["Markdown"]
+uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
+
+[[JSON]]
+deps = ["Dates", "Mmap", "Parsers", "Unicode"]
+git-tree-sha1 = "b34d7cef7b337321e97d22242c3c2b91f476748e"
+uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
+version = "0.21.0"
+
+[[LibGit2]]
+uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
+
+[[Libdl]]
+uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
+
+[[Logging]]
+uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
+
+[[Markdown]]
+deps = ["Base64"]
+uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
+
+[[Mmap]]
+uuid = "a63ad114-7e13-5084-954f-fe012c677804"
+
+[[Parsers]]
+deps = ["Dates", "Test"]
+git-tree-sha1 = "ef0af6c8601db18c282d092ccbd2f01f3f0cd70b"
+uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
+version = "0.3.7"
+
+[[Pkg]]
+deps = ["Dates", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "UUIDs"]
+uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
+
+[[Printf]]
+deps = ["Unicode"]
+uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
+
+[[REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets"]
+uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
+
+[[Random]]
+deps = ["Serialization"]
+uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+
+[[SHA]]
+uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
+
+[[Serialization]]
+uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
+
+[[Sockets]]
+uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
+
+[[Test]]
+deps = ["Distributed", "InteractiveUtils", "Logging", "Random"]
+uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[[UUIDs]]
+deps = ["Random", "SHA"]
+uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
+
+[[Unicode]]
+uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"

docs/Project.toml

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+[deps]
+Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+
+[compat]
+Documenter = "~0.26"

docs/make.jl

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+using Documenter, LogExpFunctions
+
+makedocs(
+    modules = [LogExpFunctions],
+    format = Documenter.HTML(),
+    checkdocs = :exports,
+    sitename = "LogExpFunctions.jl",
+    pages = Any["index.md"]
+)
+
+deploydocs(
+    repo = "github.com/tpapp/LogExpFunctions.jl.git",
+)

docs/src/index.md

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+# LogExpFunctions
+
+Various special functions based on `log` and `exp` moved from [StatsFuns.jl](https://github.com/JuliaStats/StatsFuns.jl) into a separate package, to minimize dependencies. These functions only use native Julia code, so there is no need to depend on `librmath` or similar libraries. See the discussion at [StatsFuns.jl#46](https://github.com/JuliaStats/StatsFuns.jl/issues/46).
+
+The original authors of these functions are the StatsFuns.jl contributors.
+
+```@docs
+xlogx
+xlogy
+logistic
+logit
+log1psq
+log1pexp
+log1mexp
+log2mexp
+logexpm1
+log1pmx
+logmxp1
+logaddexp
+logsumexp
+softmax!
+softmax
+```