some bug fixing

src/json.hpp.re2c

@@ -1604,11 +1604,65 @@ class basic_json
     json_value m_value = {};
 
 
-  public:
+  private:
     ///////////////
     // iterators //
     ///////////////
 
+    /// values of a generic iterator type of non-container JSON values
+    enum class generic_iterator_value
+    {
+        /// the iterator was not initialized
+        uninitialized,
+        /// the iterator points to the only value
+        begin,
+        /// the iterator points past the only value
+        end,
+        /// the iterator points to an invalid value
+        invalid
+    };
+
+    /// an iterator value
+    union internal_iterator
+    {
+        /// iterator for JSON objects
+        typename object_t::iterator object_iterator;
+        /// iterator for JSON arrays
+        typename array_t::iterator array_iterator;
+        /// generic iteraotr for all other value types
+        generic_iterator_value generic_iterator;
+
+        /// default constructor
+        internal_iterator() : generic_iterator(generic_iterator_value::uninitialized) {}
+        /// constructor for object iterators
+        internal_iterator(typename object_t::iterator v) : object_iterator(v) {}
+        /// constructor for array iterators
+        internal_iterator(typename array_t::iterator v) : array_iterator(v) {}
+        /// constructor for generic iterators
+        internal_iterator(generic_iterator_value v) : generic_iterator(v) {}
+    };
+
+    /// a const iterator value
+    union internal_const_iterator
+    {
+        /// iterator for JSON objects
+        typename object_t::const_iterator object_iterator;
+        /// iterator for JSON arrays
+        typename array_t::const_iterator array_iterator;
+        /// generic iteraotr for all other value types
+        generic_iterator_value generic_iterator;
+
+        /// default constructor
+        internal_const_iterator() : generic_iterator(generic_iterator_value::uninitialized) {}
+        /// constructor for object iterators
+        internal_const_iterator(typename object_t::iterator v) : object_iterator(v) {}
+        /// constructor for array iterators
+        internal_const_iterator(typename array_t::iterator v) : array_iterator(v) {}
+        /// constructor for generic iterators
+        internal_const_iterator(generic_iterator_value v) : generic_iterator(v) {}
+    };
+
+  public:
     /// a bidirectional iterator for the basic_json class
     class iterator : public std::iterator<std::bidirectional_iterator_tag, basic_json>
     {
@@ -1624,39 +1678,6 @@ class basic_json
         /// the category of the iterator
         using iterator_category = std::bidirectional_iterator_tag;
 
-        /// values of a generic iterator type of non-container JSON values
-        enum class generic_iterator_value
-        {
-            /// the iterator was not initialized
-            uninitialized,
-            /// the iterator points to the only value
-            begin,
-            /// the iterator points past the only value
-            end,
-            /// the iterator points to an invalid value
-            invalid
-        };
-
-        /// an iterator value
-        union internal_iterator
-        {
-            /// iterator for JSON objects
-            typename object_t::iterator object_iterator;
-            /// iterator for JSON arrays
-            typename array_t::iterator array_iterator;
-            /// generic iteraotr for all other value types
-            generic_iterator_value generic_iterator;
-
-            /// default constructor
-            internal_iterator() : generic_iterator(generic_iterator_value::uninitialized) {}
-            /// constructor for object iterators
-            internal_iterator(typename object_t::iterator v) : object_iterator(v) {}
-            /// constructor for array iterators
-            internal_iterator(typename array_t::iterator v) : array_iterator(v) {}
-            /// constructor for generic iterators
-            internal_iterator(generic_iterator_value v) : generic_iterator(v) {}
-        };
-
         /// constructor for a given JSON instance
         inline iterator(pointer object) : m_object(object)
         {
@@ -2015,39 +2036,6 @@ class basic_json
         /// the category of the iterator
         using iterator_category = std::bidirectional_iterator_tag;
 
-        /// values of a generic iterator type of non-container JSON values
-        enum class generic_iterator_value
-        {
-            /// the iterator was not initialized
-            uninitialized,
-            /// the iterator points to the only value
-            begin,
-            /// the iterator points past the only value
-            end,
-            /// the iterator points to an invalid value
-            invalid
-        };
-
-        /// an iterator value
-        union internal_const_iterator
-        {
-            /// iterator for JSON objects
-            typename object_t::const_iterator object_iterator;
-            /// iterator for JSON arrays
-            typename array_t::const_iterator array_iterator;
-            /// generic iteraotr for all other value types
-            generic_iterator_value generic_iterator;
-
-            /// default constructor
-            internal_const_iterator() : generic_iterator(generic_iterator_value::uninitialized) {}
-            /// constructor for object iterators
-            internal_const_iterator(typename object_t::iterator v) : object_iterator(v) {}
-            /// constructor for array iterators
-            internal_const_iterator(typename array_t::iterator v) : array_iterator(v) {}
-            /// constructor for generic iterators
-            internal_const_iterator(generic_iterator_value v) : generic_iterator(v) {}
-        };
-
         /// constructor for a given JSON instance
         inline const_iterator(pointer object) : m_object(object)
         {
@@ -2072,8 +2060,29 @@ class basic_json
         }
 
         /// copy constructor given a nonconst iterator
-        inline const_iterator(const iterator& other) : m_object(other.m_object), m_it(other.m_it)
-        {}
+        inline const_iterator(const iterator& other) : m_object(other.m_object)
+        {
+            switch (m_object->m_type)
+            {
+                case (basic_json::value_t::object):
+                {
+                    m_it.object_iterator = other.m_it.object_iterator;
+                    break;
+                }
+
+                case (basic_json::value_t::array):
+                {
+                    m_it.array_iterator = other.m_it.array_iterator;
+                    break;
+                }
+
+                default:
+                {
+                    m_it.generic_iterator = other.m_it.generic_iterator;
+                    break;
+                }
+            }
+        }
 
         /// copy assignment
         inline const_iterator operator=(const const_iterator& other) noexcept

test/unit.cpp

@@ -2285,7 +2285,7 @@ TEST_CASE("iterators")
 
         SECTION("json + begin/end")
         {
-            auto it = j.begin();
+            json::iterator it = j.begin();
             CHECK(it != j.end());
             CHECK(*it == j);
 
@@ -2310,7 +2310,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + begin/end")
         {
-            auto it = j_const.begin();
+            json::const_iterator it = j_const.begin();
             CHECK(it != j_const.end());
             CHECK(*it == j_const);
 
@@ -2335,7 +2335,7 @@ TEST_CASE("iterators")
 
         SECTION("json + cbegin/cend")
         {
-            auto it = j.cbegin();
+            json::const_iterator it = j.cbegin();
             CHECK(it != j.cend());
             CHECK(*it == j);
 
@@ -2360,7 +2360,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + cbegin/cend")
         {
-            auto it = j_const.cbegin();
+            json::const_iterator it = j_const.cbegin();
             CHECK(it != j_const.cend());
             CHECK(*it == j_const);
 
@@ -2391,7 +2391,7 @@ TEST_CASE("iterators")
 
         SECTION("json + begin/end")
         {
-            auto it = j.begin();
+            json::iterator it = j.begin();
             CHECK(it != j.end());
             CHECK(*it == j);
 
@@ -2416,7 +2416,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + begin/end")
         {
-            auto it = j_const.begin();
+            json::const_iterator it = j_const.begin();
             CHECK(it != j_const.end());
             CHECK(*it == j_const);
 
@@ -2441,7 +2441,7 @@ TEST_CASE("iterators")
 
         SECTION("json + cbegin/cend")
         {
-            auto it = j.cbegin();
+            json::const_iterator it = j.cbegin();
             CHECK(it != j.cend());
             CHECK(*it == j);
 
@@ -2466,7 +2466,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + cbegin/cend")
         {
-            auto it = j_const.cbegin();
+            json::const_iterator it = j_const.cbegin();
             CHECK(it != j_const.cend());
             CHECK(*it == j_const);
 
@@ -2509,7 +2509,7 @@ TEST_CASE("iterators")
 
         SECTION("json + begin/end")
         {
-            auto it = j.begin();
+            json::iterator it = j.begin();
             CHECK(it != j.end());
             CHECK(*it == j);
 
@@ -2534,7 +2534,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + begin/end")
         {
-            auto it = j_const.begin();
+            json::const_iterator it = j_const.begin();
             CHECK(it != j_const.end());
             CHECK(*it == j_const);
 
@@ -2559,7 +2559,7 @@ TEST_CASE("iterators")
 
         SECTION("json + cbegin/cend")
         {
-            auto it = j.cbegin();
+            json::const_iterator it = j.cbegin();
             CHECK(it != j.cend());
             CHECK(*it == j);
 
@@ -2584,7 +2584,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + cbegin/cend")
         {
-            auto it = j_const.cbegin();
+            json::const_iterator it = j_const.cbegin();
             CHECK(it != j_const.cend());
             CHECK(*it == j_const);
 
@@ -2615,7 +2615,7 @@ TEST_CASE("iterators")
 
         SECTION("json + begin/end")
         {
-            auto it = j.begin();
+            json::iterator it = j.begin();
             CHECK(it != j.end());
             CHECK(*it == j);
 
@@ -2640,7 +2640,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + begin/end")
         {
-            auto it = j_const.begin();
+            json::const_iterator it = j_const.begin();
             CHECK(it != j_const.end());
             CHECK(*it == j_const);
 
@@ -2665,7 +2665,7 @@ TEST_CASE("iterators")
 
         SECTION("json + cbegin/cend")
         {
-            auto it = j.cbegin();
+            json::const_iterator it = j.cbegin();
             CHECK(it != j.cend());
             CHECK(*it == j);
 
@@ -2690,7 +2690,7 @@ TEST_CASE("iterators")
 
         SECTION("const json + cbegin/cend")
         {
-            auto it = j_const.cbegin();
+            json::const_iterator it = j_const.cbegin();
             CHECK(it != j_const.cend());
             CHECK(*it == j_const);
 
@@ -2721,25 +2721,25 @@ TEST_CASE("iterators")
 
         SECTION("json + begin/end")
         {
-            auto it = j.begin();
+            json::iterator it = j.begin();
             CHECK(it == j.end());
         }
 
         SECTION("const json + begin/end")
         {
-            auto it = j_const.begin();
+            json::const_iterator it = j_const.begin();
             CHECK(it == j_const.end());
         }
 
         SECTION("json + cbegin/cend")
         {
-            auto it = j.cbegin();
+            json::const_iterator it = j.cbegin();
             CHECK(it == j.cend());
         }
 
         SECTION("const json + cbegin/cend")
         {
-            auto it = j_const.cbegin();
+            json::const_iterator it = j_const.cbegin();
             CHECK(it == j_const.cend());
         }
     }