Update polymorphic_value.h

ilya-lavrenov · web-flow · commit 30e39f889dd2 · 2024-10-15T12:41:41.000+04:00
diff --git a/include/jinja2cpp/polymorphic_value.h b/include/jinja2cpp/polymorphic_value.h
@@ -31,6 +31,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <typeinfo>
 #include <utility>
 
+// required variant_CPP17_OR_GREATER definition
+#include <nonstd/variant.hpp>
 
 //
 // in_place: code duplicated in any-lite, expected-lite, optional-lite, value-ptr-lite, variant-lite:
