MSVC does not define THRUST_CPP_DIALECT correctly

[bjude]

MSVC always defines __cplusplus as 199711L, regardless of the standard mode, which means that THRUST_CPP_DIALECT will always be set to 2003.

#1028 attempted to work around this by using _MSVC_LANG to set THRUST_CPP_DIALECT correctly but ran into problems with MSVC's standard compliance on older versions MSVC regarding expression SFINAE.

[alliepiper]

Just to keep this issue updated -- there's a patch on the way that will update the dialect detection to use _MSVC_LANG instead of __cplusplus when defined and deprecate support for MSVC compilers that don't define it. This will effectively resolve this issue.

[alliepiper]

This has been addressed in #1089.