fix: VS build fixed

example/experimental_angle.cpp

@@ -20,6 +20,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+#include <units/bits/external/hacks.h> // IWYU pragma: keep
 #include <units/generic/angle.h>
 #include <units/isq/si/energy.h>
 #include <units/isq/si/force.h>
@@ -28,6 +29,10 @@
 #include <units/quantity_io.h>
 #include <iostream>
 
+#if defined(UNITS_COMP_MSVC)
+#pragma warning( disable : 4459 ) // Disable shadowing warning.
+#endif
+
 int main()
 {
   using namespace units::references;

src/core/include/units/bits/basic_concepts.h

@@ -32,6 +32,7 @@
 // IWYU pragma: end_exports
 
 #include <cstdint>
+#include <functional>
 #include <utility>
 
 namespace units {

test/unit_test/runtime/fmt_units_test.cpp

@@ -20,6 +20,12 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+#include <units/bits/external/hacks.h> // IWYU pragma: keep
+
+#if defined(UNITS_COMP_MSVC)
+#pragma warning( disable : 4459 ) // Disable shadowing warning.
+#endif
+
 #include <units/format.h>
 #include <units/isq/iec80000/iec80000.h>
 #include <units/isq/si/iau/iau.h>
@@ -30,10 +36,6 @@
 #include <units/isq/si/us/us.h>
 #include <catch2/catch.hpp>
 
-#if defined(UNITS_COMP_MSVC)
-#pragma warning( disable : 4459 ) // Disable shadowing warning.
-#endif
-
 using namespace units::isq::si;
 using namespace units::isq::si::references;
 using namespace units::isq::si::international;