VS2019 support added

example/CMakeLists.txt

@@ -25,7 +25,6 @@ function(add_example target)
     target_link_libraries(${target} PRIVATE mp::units)
 endfunction()
 
-add_example(avg_speed)
 add_example(box_example)
 add_example(capacitor_time_curve)
 add_example(clcpp_response)
@@ -33,7 +32,6 @@ add_example(conversion_factor)
 add_example(experimental_angle)
 add_example(foot_pound_second)
 add_example(glide_computer)
-add_example(hello_units)
 add_example(kalman_filter-alpha_beta_filter_example2)
 
 conan_check_testing(linear_algebra)
@@ -44,7 +42,16 @@ target_link_libraries(linear_algebra
 )
 
 add_example(measurement)
-add_example(total_energy)
 add_example(unknown_dimension)
 
+if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+
+# TODO Those examples use Concepts terse syntax not yet supported by MSVC
+
+add_example(avg_speed)
+add_example(hello_units)
+add_example(total_energy)
+
 add_subdirectory(alternative_namespaces)
+
+endif()

example/glide_computer.cpp

@@ -28,6 +28,10 @@
 #include <array>
 #include <iostream>
 
+#if COMP_MSVC || COMP_GCC >= 10
+#include <compare>
+#endif
+
 // horizontal/vertical vector
 namespace {
 
@@ -70,7 +74,7 @@ public:
     return *this;
   }
 
-#if __GNUC__ >= 10
+#if COMP_MSVC || COMP_GCC >= 10
 
   template<typename Q2>
   [[nodiscard]] friend constexpr auto operator<=>(const vector& lhs, const vector<Q2, D>& rhs)

example/measurement.cpp

@@ -24,6 +24,10 @@
 #include <cmath>
 #include <iostream>
 
+#if COMP_MSVC || COMP_GCC >= 10
+#include <compare>
+#endif
+
 namespace {
 
 // root sum of squares
@@ -101,9 +105,9 @@ public:
     return measurement(val, val * rhs.relative_uncertainty());
   }
 
-#if __GNUC__ >= 10
+#if COMP_MSVC || COMP_GCC >= 10
 
-  [[nodiscard]] friend constexpr auto operator<=>(const measurement& lhs, const measurement& rhs) = default;
+  [[nodiscard]] constexpr auto operator<=>(const measurement&) const = default;
 
 #else