commit fcde518699fb4d9cc27bff3f34c3a85e21d54a67
author Adam Cozzette <acozzette@google.com> Tue Mar 20 11:43:51 2018 -0700
committer Adam Cozzette <acozzette@google.com> Tue Mar 20 14:44:30 2018 -0700
tree c8ca6ccddf11333e97238abbd783ef4fa8b410b1
parent 8b3a72f3e97b7ce86fc636685ea0bcf407869f39

Try using a new version of Visual Studio on AppVeyor

We need to use a new enough version to ensure that constexpr is
available.

appveyor.yml

diff --git a/appveyor.yml b/appveyor.yml
index 8b440b6..aab56b0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -10,6 +10,7 @@
 environment:
   matrix:
     - language: cpp
+      image: Visual Studio 2015
       BUILD_DLL: ON
       UNICODE: ON
 
@@ -32,8 +33,8 @@
   - move gtest gmock
 
 before_build:
-  - if %platform%==Win32 set generator=Visual Studio 12
-  - if %platform%==Win64 set generator=Visual Studio 12 Win64
+  - if %platform%==Win32 set generator=Visual Studio 14
+  - if %platform%==Win64 set generator=Visual Studio 14 Win64
   - if %platform%==Win32 set vcplatform=Win32
   - if %platform%==Win64 set vcplatform=x64