--- /dev/null
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit cmake-utils
+
+DESCRIPTION="JSON for Modern C++"
+HOMEPAGE="https://github.com/nlohmann/json https://nlohmann.github.io/json/"
+SRC_URI="https://github.com/nlohmann/json/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~ppc ~ppc64 ~x86"
+IUSE="doc test"
+
+DEPEND="doc? ( app-doc/doxygen )"
+
+DOCS=( ChangeLog.md README.md )
+
+S=${WORKDIR}/json-${PV}
+
+src_configure() {
+ local mycmakeargs=(
+ -DJSON_BuildTests=$(usex test)
+ -DJSON_MultipleHeaders=ON
+ )
+
+ cmake-utils_src_configure
+}
+
+src_compile() {
+ cmake-utils_src_compile
+ use doc && emake -C doc
+}
+
+src_test() {
+ emake check
+}
+
+src_install() {
+ cmake-utils_src_install
+ use doc && dodoc -r doc/html
+}