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libcxx/docs/DesignDocs/VisibilityMacros.rst
| Show First 20 Lines • Show All 124 Lines • ▼ Show 20 Lines | **_LIBCPP_ENUM_VIS** | ||||
| **GCC Behavior**: GCC un-hides the typeinfo for enumerations by default, even | **GCC Behavior**: GCC un-hides the typeinfo for enumerations by default, even | ||||
| if `-fvisibility=hidden` is specified. Additionally applying a visibility | if `-fvisibility=hidden` is specified. Additionally applying a visibility | ||||
| attribute to an enum class results in a warning. The macro has an empty | attribute to an enum class results in a warning. The macro has an empty | ||||
| definition with GCC. | definition with GCC. | ||||
| **_LIBCPP_EXTERN_TEMPLATE_TYPE_VIS** | **_LIBCPP_EXTERN_TEMPLATE_TYPE_VIS** | ||||
| Mark the member functions, typeinfo, and vtable of the type named in | Mark the member functions, typeinfo, and vtable of the type named in | ||||
| a `_LIBCPP_EXTERN_TEMPLATE` declaration as being exported by the libc++ library. | an extern template declaration as being exported by the libc++ library. | ||||
| This attribute must be specified on all extern class template declarations. | This attribute must be specified on all extern class template declarations. | ||||
| This macro is used to override the `_LIBCPP_TEMPLATE_VIS` attribute | This macro is used to override the `_LIBCPP_TEMPLATE_VIS` attribute | ||||
| specified on the primary template and to export the member functions produced | specified on the primary template and to export the member functions produced | ||||
| by the explicit instantiation in the dylib. | by the explicit instantiation in the dylib. | ||||
| **Windows Behavior**: `extern template` and `dllexport` are fundamentally | **Windows Behavior**: `extern template` and `dllexport` are fundamentally | ||||
| incompatible *on a class template* on Windows; the former suppresses | incompatible *on a class template* on Windows; the former suppresses | ||||
| ▲ Show 20 Lines • Show All 77 Lines • Show Last 20 Lines | |||||