diff options
Diffstat (limited to 'absl/base/config.h')
| -rw-r--r-- | absl/base/config.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/absl/base/config.h b/absl/base/config.h index 5f0dd04c8e66..495811bd88c3 100644 --- a/absl/base/config.h +++ b/absl/base/config.h @@ -372,4 +372,19 @@ #endif #endif +// For MSVC, `__has_include` is supported in VS 2017 15.3, which is later than +// the support for <optional>, <any>, <string_view>. So we use _MSC_VER to check +// whether we have VS 2017 RTM (when <optional>, <any>, <string_view> is +// implemented) or higher. +// Also, `__cplusplus` is not correctly set by MSVC, so we use `_MSVC_LANG` to +// check the language version. +// TODO(zhangxy): fix tests before enabling aliasing for `std::any`, +// `std::string_view`. +#if defined(_MSC_VER) && _MSC_VER >= 1910 && \ + ((defined(_MSVC_LANG) && _MSVC_LANG > 201402) || __cplusplus > 201402) +// #define ABSL_HAVE_STD_ANY 1 +#define ABSL_HAVE_STD_OPTIONAL 1 +// #define ABSL_HAVE_STD_STRING_VIEW 1 +#endif + #endif // ABSL_BASE_CONFIG_H_ |