feat: add module mp_units

example/include/geographic.h

@@ -24,6 +24,13 @@
 
 #include "ranged_representation.h"
 #include <mp-units/bits/fmt_hacks.h>
+#include <compare>
+#include <limits>
+#include <numbers>
+#include <ostream>
+#ifdef MP_UNITS_MODULES
+import mp_units;
+#else
 #include <mp-units/compare.h>
 #include <mp-units/format.h>
 #include <mp-units/math.h>
@@ -31,10 +38,7 @@
 #include <mp-units/quantity_point.h>
 #include <mp-units/systems/isq/space_and_time.h>
 #include <mp-units/systems/si/units.h>
-#include <compare>
-#include <limits>
-#include <numbers>
-#include <ostream>
+#endif
 
 namespace geographic {
 

example/include/ranged_representation.h

@@ -24,11 +24,15 @@
 
 #include "validated_type.h"
 #include <mp-units/bits/external/hacks.h>
-#include <mp-units/bits/fmt.h>
-#include <mp-units/customization_points.h>
 #include <algorithm>
 #include <concepts>
 #include <type_traits>
+#ifdef MP_UNITS_MODULES
+import mp_units.core;
+#else
+#include <mp-units/bits/fmt.h>
+#include <mp-units/customization_points.h>
+#endif
 
 template<std::movable T, MP_UNITS_CONSTRAINED_NTTP_WORKAROUND(std::convertible_to<T>) auto Min,
          MP_UNITS_CONSTRAINED_NTTP_WORKAROUND(std::convertible_to<T>) auto Max>

example/include/validated_type.h

@@ -23,11 +23,16 @@
 #pragma once
 
 #include <gsl/gsl-lite.hpp>
+#include <mp-units/bits/fmt_hacks.h>
+#include <ostream>
+#include <utility>
+#ifdef MP_UNITS_MODULES
+import mp_units.core_fmt;
+#else
 #include <mp-units/bits/external/hacks.h>
 #include <mp-units/bits/fmt.h>
 #include <mp-units/customization_points.h>
-#include <ostream>
-#include <utility>
+#endif
 
 inline constexpr struct validated_tag {
 } validated;