transf: don't allow mult. when degrees differ #254

	name: Check documentation builds
	on: [pull_request, workflow_dispatch]

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	check-doc:
	name: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	include:
	- os: ubuntu-latest
	compiler: g++
	- os: macOS-latest
	compiler: clang++
	runs-on: ${{ matrix.os }}
	timeout-minutes: 15
	defaults:
	run:
	shell: bash -l {0}
	env:
	CXX: "ccache ${{ matrix.compiler }}"
	CXXFLAGS: "-O2 -g"
	UV_NO_SYNC: "1"
	LD_LIBRARY_PATH: "/usr/local/lib"
	steps:
	# Setup environment
	- uses: actions/checkout@v6
	- name: Set up Python . . .
	uses: actions/setup-python@v6
	with:
	python-version-file: "pyproject.toml"
	- name: Install uv . . .
	uses: astral-sh/setup-uv@v7
	with:
	enable-cache: true

	# Build libsemigroups
	- name: "macOS only: Install libsemigroups dependencies . . ."
	if: ${{ matrix.os == 'macOS-latest' }}
	run: brew install autoconf automake libtool
	- name: "Setup ccache . . ."
	uses: Chocobo1/setup-ccache-action@v1
	with:
	update_packager_index: false
	install_ccache: true
	- name: "Install libsemigroups . . ."
	run: \|
	git clone --depth 1 --branch main https://github.com/libsemigroups/libsemigroups.git
	cd libsemigroups
	./autogen.sh && ./configure CXX="$CXX" CXXFLAGS="$CXXFLAGS" && sudo make install -j4
	ccache -s

	# Build libsemigroups_pybind11
	- name: "Install libsemigroups_pybind11 . . ."
	run: uv sync --verbose --locked --extra docs --no-dev

	# Check the docs
	- name: "Checking the doc for warnings . . ."
	run: uv run make doc SPHINXOPTS="-W"

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