Add examples directory

CMakeLists.txt

@@ -47,3 +47,7 @@ add_subdirectory(src/beman/copyable_function)
 if(BEMAN_COPYABLE_FUNCTION_BUILD_TESTS)
     add_subdirectory(tests/beman/copyable_function)
 endif()
+
+if(BEMAN_COPYABLE_FUNCTION_BUILD_TESTS)
+    add_subdirectory(examples)
+endif()

README.md

@@ -26,8 +26,6 @@ The following code snippet illustrates `copyable_function`:
 ```cpp
 #include <beman/copyable_function/copyable_function.hpp>
 
-namespace exe = beman::exemplar;
-
 // a Callable object
 struct Callable {
     int operator()() { return 42; }

examples/CMakeLists.txt

@@ -0,0 +1,3 @@
+add_executable(sample_usage sample_usage.cpp)
+
+target_link_libraries(sample_usage PRIVATE beman::copyable_function)

examples/sample_usage.cpp

@@ -0,0 +1,13 @@
+#include <beman/copyable_function/copyable_function.hpp>
+
+// a Callable object
+struct Callable {
+    int operator()() { return 42; }
+    int operator()() const noexcept { return 43; }
+};
+
+int main() {
+    beman::copyable_function<int()> f(Callable{});
+    int                             x = f();
+    return 0;
+}