some cleanup for #83

src/json.hpp

@@ -6163,7 +6163,7 @@ class basic_json
     {
       private:
         /// the container to iterate
-        basic_json& container;
+        typename basic_json::reference container;
         /// the type of the iterator to use while iteration
         using json_iterator = decltype(std::begin(container));
 
@@ -6236,7 +6236,7 @@ class basic_json
 
       public:
         /// construct iterator wrapper from a container
-        iterator_wrapper(basic_json& cont)
+        iterator_wrapper(typename basic_json::reference cont)
             : container(cont)
         {}
 

src/json.hpp.re2c

@@ -6163,7 +6163,7 @@ class basic_json
     {
       private:
         /// the container to iterate
-        basic_json& container;
+        typename basic_json::reference container;
         /// the type of the iterator to use while iteration
         using json_iterator = decltype(std::begin(container));
 
@@ -6236,7 +6236,7 @@ class basic_json
 
       public:
         /// construct iterator wrapper from a container
-        iterator_wrapper(basic_json& cont)
+        iterator_wrapper(typename basic_json::reference cont)
             : container(cont)
         {}
 

test/unit.cpp

@@ -9555,6 +9555,10 @@ TEST_CASE("iterator_wrapper")
                     {
                         CHECK(i.key() == "A");
                         CHECK(i.value() == json(1));
+
+                        // change the value
+                        i.value() = json(11);
+                        CHECK(i.value() == json(11));
                         break;
                     }
 
@@ -9562,6 +9566,10 @@ TEST_CASE("iterator_wrapper")
                     {
                         CHECK(i.key() == "B");
                         CHECK(i.value() == json(2));
+
+                        // change the value
+                        i.value() = json(22);
+                        CHECK(i.value() == json(22));
                         break;
                     }
 
@@ -9573,6 +9581,9 @@ TEST_CASE("iterator_wrapper")
             }
 
             CHECK(counter == 3);
+
+            // check if values where changed
+            CHECK(j == json({{"A", 11}, {"B", 22}}));
         }
 
         SECTION("const value")
@@ -9690,6 +9701,10 @@ TEST_CASE("iterator_wrapper")
                     {
                         CHECK(i.key() == "0");
                         CHECK(i.value() == "A");
+
+                        // change the value
+                        i.value() = "AA";
+                        CHECK(i.value() == "AA");
                         break;
                     }
 
@@ -9697,6 +9712,10 @@ TEST_CASE("iterator_wrapper")
                     {
                         CHECK(i.key() == "1");
                         CHECK(i.value() == "B");
+
+                        // change the value
+                        i.value() = "BB";
+                        CHECK(i.value() == "BB");
                         break;
                     }
 
@@ -9708,6 +9727,9 @@ TEST_CASE("iterator_wrapper")
             }
 
             CHECK(counter == 3);
+
+            // check if values where changed
+            CHECK(j == json({"AA", "BB"}));
         }
 
         SECTION("const value")