add is_unordered_set concept

bin/concepts/main.cpp

@@ -1,4 +1,5 @@
 #include <set>
+#include <unordered_set>
 
 #include "hack/logger/logger.hpp"
 #include "hack/concepts/concepts.hpp"
@@ -15,6 +16,12 @@ void test_associative(const T& m)
   hack::log()("is associative", m);
 }
 
+template<hack::concepts::is_unordered_set T>
+void test_unordered_set(const T& m)
+{
+  hack::log()("is unordered set", m);
+}
+
 auto main(int argc, char *argv[]) -> int
 {
   std::map<std::string, int> m { { "a", 1 }, { "b", 2 } };
@@ -26,6 +33,10 @@ auto main(int argc, char *argv[]) -> int
 
   std::vector<int> v { 1, 2, 3 };
   // test_associative(v); error !!!
+
+  std::unordered_set<int> us { 1, 2, 3 };
+  test_unordered_set(us);
+  test_associative(us);
 }
 
 

bin/logger/main.cpp

@@ -1,4 +1,5 @@
 #include <set>
+#include <unordered_set>
 
 #include "hack/logger/logger.hpp"
 
@@ -9,6 +10,8 @@ auto main(int argc, char *argv[]) -> int
 
   std::vector<int> v { 1, 2, 3 };
   hack::log()(v, s);
+
+  std::unordered_set<int> us { 1, 2, 3 };
+
+  hack::log()(v, s, us);
 }
-
-

bin/meson.build

@@ -1,6 +1,6 @@
 executable(
   'hack', 
-  'utils/main.cpp', 
+  'logger/main.cpp', 
   dependencies : deps,
   cpp_args: args,
   include_directories : inc