units building and packaging redesigned + Travis CI support

example/CMakeLists.txt

@@ -20,23 +20,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-cmake_minimum_required(VERSION 3.8)
-project(units_example)
-
-# set path to custom cmake modules
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../cmake/common/cmake")
-
-# include common tools and workarounds
-include(tools)
-
-# add dependencies
-if(NOT TARGET mp::units)
-    find_package(units CONFIG REQUIRED)
-endif()
-
 # example app
 add_executable(example example.cpp)
 target_link_libraries(example
     PRIVATE
-        mp::units
+        units::units
 )

example/example.cpp

@@ -23,26 +23,40 @@
 #include "units/si/velocity.h"
 #include <iostream>
 
-using namespace units;
+namespace {
 
-template<Velocity V, Time T>
-void foo(V v, T t)
+using namespace units::literals;
+
+template<units::Length D, units::Time T>
+constexpr units::Velocity avg_speed(D d, T t)
 {
-  const Length distance = v * t;
-  std::cout << "A car driving " << v.count() << " km/h in a time of " << t.count() << " minutes will pass "
-            << quantity_cast<length<meter, double>>(distance).count() << " meters.\n";
+  return d / t;
 }
 
-void foo()
+template<units::Velocity V, units::Time T>
+void example_1(V v, T t)
 {
-  using namespace units::literals;
-  foo(60_kmph, 10.0_min);
+  const units::Length distance = v * t;
+  std::cout << "A car driving " << v.count() << " km/h in a time of " << t.count() << " minutes will pass "
+            << units::quantity_cast<units::length<units::meter, double>>(distance).count() << " meters.\n";
+}
+
+void example_2(double distance_v, double duration_v)
+{
+  units::length<units::kilometer> distance(distance_v);
+  units::time<units::hour> duration(duration_v);
+  const auto kmph = avg_speed(distance, duration);
+  std::cout << "Average speed of a car that makes " << distance.count() << " km in "
+            << duration.count() << " hours is " << kmph.count() << " km/h.\n";
+}
+
 }
 
 int main()
 {
   try {
-    foo();
+    example_1(60_kmph, 10.0_min);
+    example_2(220, 2);
   }
   catch (const std::exception& ex) {
     std::cerr << "Unhandled std exception caught: " << ex.what() << '\n';