lib/nlohmann_json/String: add `fallback` parameter #889

	---
	on:
	workflow_dispatch:
	push:
	paths-ignore:
	- 'fuzzer/**'
	branches:
	- master
	pull_request:
	paths-ignore:
	- 'fuzzer/**'
	branches:
	- master

	permissions:
	contents: read # to fetch code (actions/checkout)

	jobs:
	build:
	runs-on: ubuntu-24.04
	steps:
	- id: checkout
	uses: actions/checkout@v5
	with:
	submodules: recursive

	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y --no-install-recommends \
	postgresql postgresql-client \
	meson \
	ccache \
	libfmt-dev \
	libavahi-client-dev \
	libsystemd-dev \
	libdbus-1-dev \
	libcap-dev \
	libmariadb-dev \
	libseccomp-dev \
	libsodium-dev \
	libssl-dev \
	libcurl4-openssl-dev \
	libpq-dev \
	libluajit-5.1-dev \
	nettle-dev \
	libpcre2-dev \
	nlohmann-json3-dev \
	libgtest-dev

	- id: cache-ccache
	uses: hendrikmuhs/ccache-action@v1

	- name: Configure
	run: \|
	meson setup \
	-Davahi=enabled \
	-Dcurl=enabled \
	-Dlua=enabled \
	-Dmariadb=enabled \
	-Dnettle=enabled \
	-Dpcre=enabled \
	-Dpg=enabled \
	-Dsodium=enabled \
	-During=disabled \
	-Dwas=enabled \
	-Djson=enabled \
	-Dtest=enabled \
	--wrap-mode=nofallback \
	--force-fallback-for=nlohmann_json,libcm4all-was-protocol,libcm4all-was-simple,libcm4all-http \
	output
	# Note: io_uring is disabled because the liburing version in
	# Ubuntu is broken; it redefines "struct open_how"

	- name: Build
	run: ninja -C output -v

	- name: Set up PostgreSQL (for unit tests)
	run: \|
	sudo systemctl start postgresql.service
	pg_isready
	sudo -u postgres createuser -w $USER
	sudo -u postgres createdb -O $USER test

	- name: Unit Tests
	run: PG_CONNINFO=dbname=test meson test -C output --print-errorlogs

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