Merge branch 'develop'

README.md

@@ -3,3 +3,9 @@
 For background, please see the article ["Simple C++11 metaprogramming"](http://pdimov.com/cpp2/simple_cxx11_metaprogramming.html).
 
 The library should be placed in a subdirectory `libs/mp11` in a Boost distribution. There is reference documentation in `doc/html/mp11.html`.
+
+Supported compilers:
+
+* g++ 4.7 or later
+* clang 3.5 or later
+* Visual Studio 2013, 2015, 2017

appveyor.yml

@@ -11,6 +11,15 @@ branches:
     - master
     - develop
 
+environment:
+  matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      TOOLSET: msvc-12.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-14.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+
 install:
   - cd ..
   - git clone -b %APPVEYOR_REPO_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
@@ -27,4 +36,4 @@ install:
 build: off
 
 test_script:
-  - b2 libs/mp11/test toolset=msvc-14.0
+  - b2 libs/mp11/test toolset=%TOOLSET%