diff --git a/.drone.star b/.drone.star
new file mode 100644
index 0000000000..713b7b549e
--- /dev/null
+++ b/.drone.star
@@ -0,0 +1,43 @@
+# Use, modification, and distribution are
+# subject to the Boost Software License, Version 1.0. (See accompanying
+# file LICENSE.txt)
+#
+# Copyright Rene Rivera 2020.
+
+# For Drone CI we use the Starlark scripting language to reduce duplication.
+# As the yaml syntax for Drone CI is rather limited.
+#
+#
+globalenv={'secure': 'gB1wvjk565j3O4UBGjyN44Vd8IGqcNHzkbvRdFNHp7C+C+JG2vhAeLlpiK0Zd483gdTjq9gPjIDwpwyG2UJ+yjT1kMTJvD1YNWpGcK6vOHYl1yMOwv/LBdnKn+J7i/FnoeULGRCCI2Fpp1qILhxeZgLxTxsdQaYXlAkkR0i8cgQ='}
+linuxglobalimage="cppalliance/droneubuntu1404:1"
+windowsglobalimage="cppalliance/dronevs2019"
+
+def main(ctx):
+  return [
+  linux_cxx("UNIT_TESTS=true COMPILER=clang++-3.9 BOOST_VE Job 0", "clang++-3.9", packages="clang-3.9 valgrind doxygen", llvm_os="trusty", llvm_ver="3.9", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'clang++-3.9', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': 'b6589fc6ab'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=clang++-4.0 BOOST_VE Job 1", "clang++-4.0", packages="clang-4.0 valgrind doxygen", llvm_os="trusty", llvm_ver="4.0", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'clang++-4.0', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': '356a192b79'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=clang++-5.0 BOOST_VE Job 2", "clang++-5.0", packages="clang-5.0 valgrind doxygen", llvm_os="trusty", llvm_ver="5.0", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'clang++-5.0', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': 'da4b9237ba'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=clang++-6.0 BOOST_VE Job 3", "clang++-6.0", packages="clang-6.0 valgrind doxygen", llvm_os="trusty", llvm_ver="6.0", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'clang++-6.0', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': '77de68daec'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=clang++-7 BOOST_VERS Job 4", "clang++-7", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'clang++-7', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': '1b64538924'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=g++-6 BOOST_VERSION= Job 5", "g++-6", packages="g++-6 valgrind doxygen", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'g++-6', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': 'ac3478d69a'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=g++-7 BOOST_VERSION= Job 6", "g++-7", packages="g++-7 valgrind doxygen", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'g++-7', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': 'c1dfd96eea'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=g++-8 BOOST_VERSION= Job 7", "g++-8", packages="g++-8 valgrind doxygen", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'g++-8', 'BOOST_VERSION': 'default', 'ENABLE_MEMCHECK': 'true', 'DRONE_JOB_UUID': '902ba3cda1'}, globalenv=globalenv),
+  osx_cxx("UNIT_TESTS=true BOOST_VERSION=default Job 8", "g++", packages=" doxygen", buildtype="boost", buildscript="drone", xcode_version="11", environment={'UNIT_TESTS': 'true', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': 'fe5dbbcea5'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default BOOST_VERSIO Job 9", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'CMAKE_OPTIONS': '-DCMAKE_CXX_STANDARD=17 -DCMAKE_CXX_STANDARD_REQUIRED=ON', 'UNIT_TESTS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': '0ade7c2cf9'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=g++-6     BOOST_VERS Job 10", "g++-6", packages="g++-6 valgrind doxygen", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'CMAKE_OPTIONS': '-DCMAKE_CXX_STANDARD=17 -DCMAKE_CXX_STANDARD_REQUIRED=ON', 'UNIT_TESTS': 'true', 'COMPILER': 'g++-6', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': 'b1d5781111'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default BOOST_VERSIO Job 11", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'CMAKE_OPTIONS': '-DBOOST_HANA_ENABLE_CONCEPT_CHECKS=OFF', 'UNIT_TESTS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': '17ba079149'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default BOOST_VERSIO Job 12", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'CMAKE_OPTIONS': '-DBOOST_HANA_ENABLE_DEBUG_MODE=ON', 'UNIT_TESTS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': '7b52009b64'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default BOOST_VERSIO Job 13", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'CMAKE_OPTIONS': '-DBOOST_HANA_ENABLE_EXCEPTIONS=OFF', 'UNIT_TESTS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': 'bd307a3ec3'}, globalenv=globalenv),
+  osx_cxx("UNIT_TESTS=true BOOST_VERSION=default CMAKE_O Job 14", "g++", packages=" doxygen", buildtype="boost", buildscript="drone", xcode_version="11", environment={'CMAKE_OPTIONS': '-DBOOST_HANA_ENABLE_EXCEPTIONS=OFF', 'UNIT_TESTS': 'true', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': 'fa35e19212'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default BOOST_VERSIO Job 15", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': '1.64.0', 'DRONE_JOB_UUID': 'f1abd67035'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default BOOST_VERSIO Job 16", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': '1.65.1', 'DRONE_JOB_UUID': '1574bddb75'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default Job 17", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'default', 'DRONE_JOB_UUID': '0716d9708d'}, globalenv=globalenv),
+  linux_cxx("BOOST_BUILD=true COMPILER=default BOOST_VERSI Job 18", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'BOOST_BUILD': 'true', 'COMPILER': 'default', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': '9e6a55b6b4'}, globalenv=globalenv),
+  osx_cxx("BOOST_BUILD=true BOOST_VERSION=default Job 19", "g++", packages=" doxygen", buildtype="boost", buildscript="drone", xcode_version="11", environment={'BOOST_BUILD': 'true', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': 'b3f0c7f6bb'}, globalenv=globalenv),
+  osx_cxx("DOCUMENTATION=true BOOST_VERSION=default Job 20", "g++", packages=" doxygen", buildtype="boost", buildscript="drone", environment={'DOCUMENTATION': 'true', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': '91032ad7bb'}, globalenv=globalenv),
+  linux_cxx("BENCHMARKS=true COMPILER=default BOOST_VERSIO Job 21", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'CMAKE_OPTIONS': '-DCMAKE_BUILD_TYPE=Release', 'BENCHMARKS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': 'default', 'DRONE_JOB_UUID': '472b07b9fc'}, globalenv=globalenv),
+  linux_cxx("UNIT_TESTS=true COMPILER=default BOOST_VERSIO Job 22", "default", packages="clang-7 valgrind doxygen", llvm_os="trusty", llvm_ver="7", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'UNIT_TESTS': 'true', 'COMPILER': 'default', 'BOOST_VERSION': 'trunk', 'DRONE_JOB_UUID': '12c6fc06c9'}, globalenv=globalenv),
+    ]
+
+# from https://github.com/boostorg/boost-ci
+load("@boost_ci//ci/drone/:functions.star", "linux_cxx","windows_cxx","osx_cxx","freebsd_cxx")
diff --git a/.drone/before-script.sh b/.drone/before-script.sh
new file mode 100755
index 0000000000..6cc0b88092
--- /dev/null
+++ b/.drone/before-script.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Copyright 2020 Rene Rivera, Sam Darwin
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE.txt or copy at http://boost.org/LICENSE_1_0.txt)
+
+if [ "$DRONE_JOB_UUID" = "b6589fc6ab" ] || [ "$DRONE_JOB_UUID" = "356a192b79" ] || [ "$DRONE_JOB_UUID" = "da4b9237ba" ] || [ "$DRONE_JOB_UUID" = "77de68daec" ] || [ "$DRONE_JOB_UUID" = "1b64538924" ] || [ "$DRONE_JOB_UUID" = "ac3478d69a" ] || [ "$DRONE_JOB_UUID" = "c1dfd96eea" ] || [ "$DRONE_JOB_UUID" = "902ba3cda1" ] || [ "$DRONE_JOB_UUID" = "fe5dbbcea5" ] || [ "$DRONE_JOB_UUID" = "0ade7c2cf9" ] || [ "$DRONE_JOB_UUID" = "b1d5781111" ] || [ "$DRONE_JOB_UUID" = "17ba079149" ] || [ "$DRONE_JOB_UUID" = "7b52009b64" ] || [ "$DRONE_JOB_UUID" = "bd307a3ec3" ] || [ "$DRONE_JOB_UUID" = "fa35e19212" ] || [ "$DRONE_JOB_UUID" = "f1abd67035" ] || [ "$DRONE_JOB_UUID" = "1574bddb75" ] || [ "$DRONE_JOB_UUID" = "0716d9708d" ] || [ "$DRONE_JOB_UUID" = "9e6a55b6b4" ] || [ "$DRONE_JOB_UUID" = "b3f0c7f6bb" ] || [ "$DRONE_JOB_UUID" = "91032ad7bb" ] || [ "$DRONE_JOB_UUID" = "472b07b9fc" ] || [ "$DRONE_JOB_UUID" = "12c6fc06c9" ] ; then
+    if [[ "${BOOST_BUILD}" == "true" ]]; then
+      rm -rf "${BOOST_DIR}/libs/hana"
+      cp -rp ${TRAVIS_BUILD_DIR} "${BOOST_DIR}/libs/hana"
+      export TRAVIS_BUILD_DIR="${BOOST_DIR}/libs/hana"
+    fi
+
+    git config --global user.name "Travis bot"
+    git config --global user.email "<>"
+    cd "${TRAVIS_BUILD_DIR}"
+    (mkdir build && cd build && cmake .. ${CMAKE_OPTIONS})
+fi
+
diff --git a/.drone/drone.sh b/.drone/drone.sh
new file mode 100755
index 0000000000..11ae0e69ab
--- /dev/null
+++ b/.drone/drone.sh
@@ -0,0 +1,188 @@
+#!/bin/bash
+
+# Copyright 2020 Rene Rivera, Sam Darwin
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE.txt or copy at http://boost.org/LICENSE_1_0.txt)
+
+set -e
+export TRAVIS_BUILD_DIR=$(pwd)
+export DRONE_BUILD_DIR=$(pwd)
+export TRAVIS_BRANCH=$DRONE_BRANCH
+export VCS_COMMIT_ID=$DRONE_COMMIT
+export GIT_COMMIT=$DRONE_COMMIT
+export REPO_NAME=$DRONE_REPO
+export PATH=~/.local/bin:/usr/local/bin:$PATH
+
+if [ "$DRONE_JOB_BUILDTYPE" == "boost" ]; then
+
+echo '==================================> INSTALL'
+
+
+# Drone adding ruby
+git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
+echo 'export PATH="$HOME/.rbenv/bin:$HOME/.rbenv/shims:$PATH"' >> ~/.bash_profile
+exec $SHELL
+pushd $HOME
+git clone git@github.com:sstephenson/ruby-build.git
+cd ruby-build
+./install.sh
+ruby-build 1.8.7-p352 ~/.rbenv/versions/1.8.7-p352
+ruby-build 1.9.3-preview1 ~/.rbenv/versions/1.9.3-preview1
+rbenv rehash
+rbenv set-default 2.1.4
+ruby --version
+popd
+
+DEPS_DIR="${HOME}/deps"
+mkdir -p ${DEPS_DIR} && cd ${DEPS_DIR}
+if [[ "${COMPILER}" == "default" ]]; then COMPILER=clang++-7; fi
+if [[ "${BOOST_VERSION}" == "default" ]]; then BOOST_VERSION=1.66.0; fi
+if [[ "${COMPILER}" != "" ]]; then export CXX=${COMPILER}; fi
+${CXX} --version
+if [[ "${BOOST_VERSION}" != "" ]]; then
+  BOOST_DIR=${DEPS_DIR}/boost-${BOOST_VERSION}
+  if [[ "${BOOST_VERSION}" == "trunk" ]]; then
+    BOOST_URL="http://github.com/boostorg/boost.git"
+    git clone --depth 1 --recursive ${BOOST_URL} ${BOOST_DIR} || exit 1
+    (cd ${BOOST_DIR} && ./bootstrap.sh && ./b2 headers) || exit 1
+  else
+    BOOST_URL="https://dl.bintray.com/boostorg/release/${BOOST_VERSION}/source/boost_${BOOST_VERSION//\./_}.tar.gz"
+    mkdir -p ${BOOST_DIR}
+    { wget -O - ${BOOST_URL} | tar --strip-components=1 -xz -C ${BOOST_DIR}; } || exit 1
+  fi
+  # Make sure we don't conflict with the Hana shipped with Boost
+  rm -r ${BOOST_DIR}/boost/{hana,hana.hpp} || exit 1
+
+  CMAKE_OPTIONS+=" -DBOOST_ROOT=${BOOST_DIR}"
+fi
+
+if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
+  CMAKE_URL="https://cmake.org/files/v3.10/cmake-3.10.0-Linux-x86_64.tar.gz"
+  mkdir cmake && wget --no-check-certificate --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C cmake
+  export PATH=${DEPS_DIR}/cmake/bin:${PATH}
+else
+  true brew install cmake || true brew upgrade cmake
+fi
+
+cmake --version || true
+if [[ "${BOOST_BUILD}" == "true" ]]; then
+  (cd ${BOOST_DIR}/tools/build && ./bootstrap.sh && ./b2 install --prefix=${DEPS_DIR}/b2)
+  export PATH=${DEPS_DIR}/b2/bin:${PATH}
+  b2 --version || true # b2 --version returns 1
+fi
+
+if [[ "${CXX%%+*}" == "clang" ]]; then
+    if [[ "${CXX}" == "clang++-3.9" ]]; then LLVM_VERSION="3.9.1";
+  elif [[ "${CXX}" == "clang++-4.0" ]]; then LLVM_VERSION="4.0.1";
+  elif [[ "${CXX}" == "clang++-5.0" ]]; then LLVM_VERSION="5.0.2";
+  elif [[ "${CXX}" == "clang++-6.0" ]]; then LLVM_VERSION="6.0.1";
+  elif [[ "${CXX}" == "clang++-7" ]];   then LLVM_VERSION="7.0.1";
+  fi
+
+  LLVM_URL="http://llvm.org/releases/${LLVM_VERSION}/llvm-${LLVM_VERSION}.src.tar.xz"
+  LIBCXX_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxx-${LLVM_VERSION}.src.tar.xz"
+  LIBCXXABI_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxxabi-${LLVM_VERSION}.src.tar.xz"
+
+  mkdir -p llvm llvm/build llvm/projects/libcxx llvm/projects/libcxxabi
+  wget -O - ${LLVM_URL} | tar --strip-components=1 -xJ -C llvm || exit 1
+  wget -O - ${LIBCXX_URL} | tar --strip-components=1 -xJ -C llvm/projects/libcxx || exit 1
+  wget -O - ${LIBCXXABI_URL} | tar --strip-components=1 -xJ -C llvm/projects/libcxxabi || exit 1
+  (cd llvm/build && cmake .. -DCMAKE_INSTALL_PREFIX=${DEPS_DIR}/llvm/install) || exit 1
+  (cd llvm/build/projects/libcxx && make install -j2) || exit 1
+  (cd llvm/build/projects/libcxxabi && make install -j2) || exit 1
+
+  export CXXFLAGS="-isystem ${DEPS_DIR}/llvm/install/include/c++/v1"
+  export LDFLAGS="-L ${DEPS_DIR}/llvm/install/lib -l c++ -l c++abi"
+  export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${DEPS_DIR}/llvm/install/lib"
+fi
+
+if [[ "${DOCUMENTATION}" == "true" ]]; then
+  true brew install doxygen
+  doxygen --version
+fi
+
+if [[ "${BENCHMARKS}" == "true" ]]; then
+  rvm use 2.1 --install --binary --fuzzy
+  gem install ruby-progressbar tilt
+fi
+
+echo '==================================> BEFORE_SCRIPT'
+
+. $DRONE_BUILD_DIR/.drone/before-script.sh
+
+echo '==================================> SCRIPT'
+
+sources=($(find include doc test example -name "*.hpp" -or -name "*.cpp"))
+LANG=POSIX grep '[^[:print:][:cntrl:]]' "${sources[@]}"; [[ $? == 1 ]] || exit 1
+LANG=POSIX grep $'\r'                   "${sources[@]}"; [[ $? == 1 ]] || exit 1
+LANG=POSIX grep $'\t'                   "${sources[@]}"; [[ $? == 1 ]] || exit 1
+LANG=POSIX grep '[[:blank:]]$'          "${sources[@]}"; [[ $? == 1 ]] || exit 1
+if [[ "${DOCUMENTATION}" == "true" ]]; then
+  (cd build && ! make doc 2>&1 | grep -E "error") || exit 1
+
+  if [[ "${TRAVIS_PULL_REQUEST}" == "false" && "${TRAVIS_BRANCH}" == "master" ]]; then
+    # Suppress output to avoid leaking the token when the command fails
+    git clone https://ldionne:${GITHUB_TOKEN}@github.com/boostorg/hana --depth 1 --branch=gh-pages doc/html &>/dev/null
+
+    rm -rf doc/html/{search,*.png,*.css,*.js,*.html}
+    cp -R build/doc/html/* doc/html/
+
+    pushd doc/html
+    git add --all .
+    git commit --allow-empty -m "Update documentation to ${TRAVIS_COMMIT:0:7}"
+    # Suppress output to avoid leaking the token
+    git push origin gh-pages &>/dev/null
+    popd
+  fi
+fi
+
+if [[ "${BENCHMARKS}" == "true" ]]; then
+  if [[ "${TRAVIS_PULL_REQUEST}" == "false" && "${TRAVIS_BRANCH}" == "master" ]]; then
+    (cd build && make benchmarks) || exit 1
+    compiler_slug=$(cd build && make travis_compiler_slug | grep 'travis_compiler_slug:' | cut -d ' ' -f 2)
+    config_slug=$(cd build && make travis_config_slug | grep 'travis_config_slug:' | cut -d ' ' -f 2)
+
+    # Suppress output to avoid leaking the token when the command fails
+    git clone https://ldionne:${GITHUB_TOKEN}@github.com/boostorg/hana --depth 1 --branch=gh-pages doc/html &>/dev/null
+    rm -rf doc/html/benchmarks/${config_slug}/${compiler_slug}/
+    mkdir -p doc/html/benchmarks/${config_slug}/${compiler_slug}/
+    for benchmark in $(ls build/benchmark/*.json | grep -v ".erb"); do
+      cp ${benchmark} doc/html/benchmarks/${config_slug}/${compiler_slug}/
+    done
+
+    pushd doc/html
+    git add --all .
+    git commit --allow-empty -m "Update benchmarks to ${TRAVIS_COMMIT:0:7} for build type '${config_slug}' and compiler '${compiler_slug}'"
+    # Suppress output to avoid leaking the token
+    git push origin gh-pages &>/dev/null
+    popd
+  else
+    export BOOST_HANA_JUST_CHECK_BENCHMARKS=true
+    (cd build && make benchmarks -j2)
+  fi
+fi
+
+if [[ "${UNIT_TESTS}" == "true" ]]; then
+  (cd build && make tests examples -j2 -k) &&
+  if [[ "${ENABLE_MEMCHECK}" == "true" ]]; then
+    (cd build && ctest --output-on-failure -j2 -D ExperimentalMemCheck)
+  else
+    (cd build && ctest --output-on-failure -j2)
+  fi
+fi
+
+if [[ "${BOOST_BUILD}" == "true" ]]; then
+  # Build documentation
+  (cd doc && b2) || exit 1
+  if [[ ! -d doc/html ]]; then exit 1; fi
+
+  # Build tests
+  echo "using clang : : ${CXX} ;" > project-config.jam
+  if [[ "${LDFLAGS}" == "" ]]; then
+    (cd test && b2 toolset=clang cxxflags="-std=c++1y ${CXXFLAGS}" include="${BOOST_DIR}") || exit 1
+  else
+    (cd test && b2 toolset=clang cxxflags="-std=c++1y ${CXXFLAGS}" include="${BOOST_DIR}" linkflags="${LDFLAGS}") || exit 1
+  fi
+fi
+
+fi