diff --git a/README.md b/README.md
index 86d8b15b6..a81e10185 100644
--- a/README.md
+++ b/README.md
@@ -849,6 +849,7 @@ I deeply appreciate the help of the following people.
 - [Steffen](https://github.com/koemeet) fixed a potential issue with MSVC and `std::min`.
 - [Mike Tzou](https://github.com/Chocobo1) fixed some typos.
 - [amrcode](https://github.com/amrcode) noted a missleading documentation about comparison of floats.
+- [Oleg Endo](https://github.com/olegendo) reduced the memory consumption by replacing `<iostream>` with `<iosfwd>`
 
 
 Thanks a lot for helping out! Please [let me know](mailto:mail@nlohmann.me) if I forgot someone.
diff --git a/doc/examples/README.cpp b/doc/examples/README.cpp
index a93ee60a9..00c93b5d3 100644
--- a/doc/examples/README.cpp
+++ b/doc/examples/README.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/README.link b/doc/examples/README.link
index 8758bf05e..19e3976a2 100644
--- a/doc/examples/README.link
+++ b/doc/examples/README.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Mi7u49cYwMR0cgTH"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/yCTCvQi0ZVxGuL3L"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/array.cpp b/doc/examples/array.cpp
index d3cc47774..b43be5a65 100644
--- a/doc/examples/array.cpp
+++ b/doc/examples/array.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/array.link b/doc/examples/array.link
index a7e408310..cd77ed145 100644
--- a/doc/examples/array.link
+++ b/doc/examples/array.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/dREyaxnVNgG1CAUx"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/jKwlQd7pFg6UcIN5"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/at__object_t_key_type.cpp b/doc/examples/at__object_t_key_type.cpp
index 611ca2267..0430617e4 100644
--- a/doc/examples/at__object_t_key_type.cpp
+++ b/doc/examples/at__object_t_key_type.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/at__object_t_key_type.link b/doc/examples/at__object_t_key_type.link
index cff20beab..b4d6efc81 100644
--- a/doc/examples/at__object_t_key_type.link
+++ b/doc/examples/at__object_t_key_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/rCEcfTCRY40LDvoR"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/FR2yYACZpx0k3Rzp"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/at__object_t_key_type_const.cpp b/doc/examples/at__object_t_key_type_const.cpp
index eae7da969..9aa2ed33c 100644
--- a/doc/examples/at__object_t_key_type_const.cpp
+++ b/doc/examples/at__object_t_key_type_const.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/at__object_t_key_type_const.link b/doc/examples/at__object_t_key_type_const.link
index 43bb6c875..6e6ca3354 100644
--- a/doc/examples/at__object_t_key_type_const.link
+++ b/doc/examples/at__object_t_key_type_const.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/SIuocSXktJ2lxj0q"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/aeF8S2D89A8lfVx1"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/at__size_type.cpp b/doc/examples/at__size_type.cpp
index 17381738a..202e44b10 100644
--- a/doc/examples/at__size_type.cpp
+++ b/doc/examples/at__size_type.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/at__size_type.link b/doc/examples/at__size_type.link
index fea3bcd54..5dec37524 100644
--- a/doc/examples/at__size_type.link
+++ b/doc/examples/at__size_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/wB9tQWAyqeajJTVn"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/GmNdQadc8cWDzYpn"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/at__size_type_const.cpp b/doc/examples/at__size_type_const.cpp
index 3f67d3782..33108ce86 100644
--- a/doc/examples/at__size_type_const.cpp
+++ b/doc/examples/at__size_type_const.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/at__size_type_const.link b/doc/examples/at__size_type_const.link
index 70dd91517..7412f09fb 100644
--- a/doc/examples/at__size_type_const.link
+++ b/doc/examples/at__size_type_const.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/s5MsN3WV6zsGcWY4"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/zLkp80JFsKEuPd1t"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/at_json_pointer.cpp b/doc/examples/at_json_pointer.cpp
index 2cb62e2d8..80ed6c158 100644
--- a/doc/examples/at_json_pointer.cpp
+++ b/doc/examples/at_json_pointer.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/at_json_pointer.link b/doc/examples/at_json_pointer.link
index 2e6a3e706..61a4410a4 100644
--- a/doc/examples/at_json_pointer.link
+++ b/doc/examples/at_json_pointer.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/SXcTwaW8DVzDT34z"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/mlj2WqOtwBidvuJx"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/at_json_pointer_const.cpp b/doc/examples/at_json_pointer_const.cpp
index 3b09f65da..1496aa5a7 100644
--- a/doc/examples/at_json_pointer_const.cpp
+++ b/doc/examples/at_json_pointer_const.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/at_json_pointer_const.link b/doc/examples/at_json_pointer_const.link
index 1ea3b078e..31e0bb080 100644
--- a/doc/examples/at_json_pointer_const.link
+++ b/doc/examples/at_json_pointer_const.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/zOTLPM0c5dNFZhk3"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/vHKlyYl9DwaUO9UN"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/back.cpp b/doc/examples/back.cpp
index f4dcced3c..cb227c2be 100644
--- a/doc/examples/back.cpp
+++ b/doc/examples/back.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/back.link b/doc/examples/back.link
index 8d757cde2..fa1ce912c 100644
--- a/doc/examples/back.link
+++ b/doc/examples/back.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Sco4kIFMzpkYo37h"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/VXTfLJQl9x7NaHrI"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__CompatibleType.cpp b/doc/examples/basic_json__CompatibleType.cpp
index 85dbccd08..1066795b2 100644
--- a/doc/examples/basic_json__CompatibleType.cpp
+++ b/doc/examples/basic_json__CompatibleType.cpp
@@ -1,10 +1,11 @@
-#include "json.hpp"
+#include <iostream>
 #include <deque>
 #include <list>
 #include <forward_list>
 #include <set>
 #include <unordered_map>
 #include <unordered_set>
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/basic_json__CompatibleType.link b/doc/examples/basic_json__CompatibleType.link
index 3ced745bb..af1157b7e 100644
--- a/doc/examples/basic_json__CompatibleType.link
+++ b/doc/examples/basic_json__CompatibleType.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/n2KT4Yk3mzZXKnS5"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/chmc1rH7aNZTIVSp"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__InputIt_InputIt.cpp b/doc/examples/basic_json__InputIt_InputIt.cpp
index 60043ff3f..36c6f571f 100644
--- a/doc/examples/basic_json__InputIt_InputIt.cpp
+++ b/doc/examples/basic_json__InputIt_InputIt.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__InputIt_InputIt.link b/doc/examples/basic_json__InputIt_InputIt.link
index c7c09d380..aad58f730 100644
--- a/doc/examples/basic_json__InputIt_InputIt.link
+++ b/doc/examples/basic_json__InputIt_InputIt.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/gsHOHaLe3MfVhI2s"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/qpFQRSCnP6iVb3dF"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__basic_json.cpp b/doc/examples/basic_json__basic_json.cpp
index c218a8e5d..98df6101d 100644
--- a/doc/examples/basic_json__basic_json.cpp
+++ b/doc/examples/basic_json__basic_json.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__basic_json.link b/doc/examples/basic_json__basic_json.link
index e8ac682d3..e894b6638 100644
--- a/doc/examples/basic_json__basic_json.link
+++ b/doc/examples/basic_json__basic_json.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/zUmWzPFVFx6sEojX"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/hRrKgHP2a0zgdxJ1"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__copyassignment.cpp b/doc/examples/basic_json__copyassignment.cpp
index b44e59930..4f1bc4394 100644
--- a/doc/examples/basic_json__copyassignment.cpp
+++ b/doc/examples/basic_json__copyassignment.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__copyassignment.link b/doc/examples/basic_json__copyassignment.link
index 1bff32a73..eec9258f8 100644
--- a/doc/examples/basic_json__copyassignment.link
+++ b/doc/examples/basic_json__copyassignment.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/1BjO38rdSmNGxpyn"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/4p0zccjr9gUI65H2"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__list_init_t.cpp b/doc/examples/basic_json__list_init_t.cpp
index 5d77dbbc7..ba1bce4ee 100644
--- a/doc/examples/basic_json__list_init_t.cpp
+++ b/doc/examples/basic_json__list_init_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__list_init_t.link b/doc/examples/basic_json__list_init_t.link
index 4419ca9a4..75234b623 100644
--- a/doc/examples/basic_json__list_init_t.link
+++ b/doc/examples/basic_json__list_init_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/H0DDK6yuoCGZuoFw"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/XyDVBlGsU1DHpRl9"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__moveconstructor.cpp b/doc/examples/basic_json__moveconstructor.cpp
index ecfdb6039..34827259e 100644
--- a/doc/examples/basic_json__moveconstructor.cpp
+++ b/doc/examples/basic_json__moveconstructor.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__moveconstructor.link b/doc/examples/basic_json__moveconstructor.link
index 7bad99106..f90473027 100644
--- a/doc/examples/basic_json__moveconstructor.link
+++ b/doc/examples/basic_json__moveconstructor.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/nXd0SKQaR6tHukvy"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/Z1uToOcza9ALJxNU"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__nullptr_t.cpp b/doc/examples/basic_json__nullptr_t.cpp
index 041a3269e..886d5ea3c 100644
--- a/doc/examples/basic_json__nullptr_t.cpp
+++ b/doc/examples/basic_json__nullptr_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__nullptr_t.link b/doc/examples/basic_json__nullptr_t.link
index 143d20a25..003110f12 100644
--- a/doc/examples/basic_json__nullptr_t.link
+++ b/doc/examples/basic_json__nullptr_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/AbLqRqEEN5N9W1Fj"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/JQUGGZT8qZyQsHRv"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__size_type_basic_json.cpp b/doc/examples/basic_json__size_type_basic_json.cpp
index 1add49252..a021edda3 100644
--- a/doc/examples/basic_json__size_type_basic_json.cpp
+++ b/doc/examples/basic_json__size_type_basic_json.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__size_type_basic_json.link b/doc/examples/basic_json__size_type_basic_json.link
index e699f9adb..e48b9fd95 100644
--- a/doc/examples/basic_json__size_type_basic_json.link
+++ b/doc/examples/basic_json__size_type_basic_json.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/ecx4xZQX7VXuhlAz"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/l4fEe7Un5ctCQNuA"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__value.cpp b/doc/examples/basic_json__value.cpp
index fced71c31..42d4aa314 100644
--- a/doc/examples/basic_json__value.cpp
+++ b/doc/examples/basic_json__value.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__value.link b/doc/examples/basic_json__value.link
index 3dc8a4076..d01827817 100644
--- a/doc/examples/basic_json__value.link
+++ b/doc/examples/basic_json__value.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/bP03yg3IIbhARy2F"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/BRt1QpTsOBkiVcRC"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__value_ptr.cpp b/doc/examples/basic_json__value_ptr.cpp
index 262fbbf63..4f6f999ec 100644
--- a/doc/examples/basic_json__value_ptr.cpp
+++ b/doc/examples/basic_json__value_ptr.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__value_ptr.link b/doc/examples/basic_json__value_ptr.link
index 482c75f0d..799f96f7d 100644
--- a/doc/examples/basic_json__value_ptr.link
+++ b/doc/examples/basic_json__value_ptr.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/OY0l4CpfWuDJudyo"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/zTlubIHYOK6EGxnc"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/basic_json__value_t.cpp b/doc/examples/basic_json__value_t.cpp
index 20cd3b4db..d52e628b9 100644
--- a/doc/examples/basic_json__value_t.cpp
+++ b/doc/examples/basic_json__value_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/basic_json__value_t.link b/doc/examples/basic_json__value_t.link
index 8e999a8dd..a66b1dd44 100644
--- a/doc/examples/basic_json__value_t.link
+++ b/doc/examples/basic_json__value_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/zRdz49DwtK0gIJuc"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/NlKuJEkKDx7IhN9Z"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/begin.cpp b/doc/examples/begin.cpp
index c2bb43ae4..ebf97e5fe 100644
--- a/doc/examples/begin.cpp
+++ b/doc/examples/begin.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/begin.link b/doc/examples/begin.link
index da79b6310..64ac5fba9 100644
--- a/doc/examples/begin.link
+++ b/doc/examples/begin.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Q0QcnX1LAQT5k7IU"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/fTnaiB7w2ocgAsw8"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/cbegin.cpp b/doc/examples/cbegin.cpp
index f4353ef08..d12c86088 100644
--- a/doc/examples/cbegin.cpp
+++ b/doc/examples/cbegin.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/cbegin.link b/doc/examples/cbegin.link
index dee6deb20..fe670f158 100644
--- a/doc/examples/cbegin.link
+++ b/doc/examples/cbegin.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/ukuefRRIclE7D7IX"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/I7blCyINJHBX81JG"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/cend.cpp b/doc/examples/cend.cpp
index 089141249..8d141acf1 100644
--- a/doc/examples/cend.cpp
+++ b/doc/examples/cend.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/cend.link b/doc/examples/cend.link
index 6dfc22775..3c7264263 100644
--- a/doc/examples/cend.link
+++ b/doc/examples/cend.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/nHLMXLRwA3QWSnsQ"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/LQmVooyLiQWjqnra"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/clear.cpp b/doc/examples/clear.cpp
index 055211cf6..e892b13e9 100644
--- a/doc/examples/clear.cpp
+++ b/doc/examples/clear.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/clear.link b/doc/examples/clear.link
index 91fa1f25b..1123e2f3e 100644
--- a/doc/examples/clear.link
+++ b/doc/examples/clear.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/WQS4WbZC6pX4qZE4"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/bJHYVEctvmaszdBj"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/count.cpp b/doc/examples/count.cpp
index b3f10d063..cd030fffc 100644
--- a/doc/examples/count.cpp
+++ b/doc/examples/count.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/count.link b/doc/examples/count.link
index 6167a6730..84666742b 100644
--- a/doc/examples/count.link
+++ b/doc/examples/count.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/mrJDlTQD3orHnAdF"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/nAD5pUgjv1DcMhh7"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/crbegin.cpp b/doc/examples/crbegin.cpp
index df0868aba..6dc4a6f7d 100644
--- a/doc/examples/crbegin.cpp
+++ b/doc/examples/crbegin.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/crbegin.link b/doc/examples/crbegin.link
index 49072710b..f97dac66f 100644
--- a/doc/examples/crbegin.link
+++ b/doc/examples/crbegin.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/XsC14rus4L6meQTg"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/3ylcqXCMzsKBSkxZ"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/crend.cpp b/doc/examples/crend.cpp
index 20c2f82a2..9a00950c0 100644
--- a/doc/examples/crend.cpp
+++ b/doc/examples/crend.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/crend.link b/doc/examples/crend.link
index 7c244144e..208c7c96a 100644
--- a/doc/examples/crend.link
+++ b/doc/examples/crend.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/jr4aG41Zr1pWUlAw"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/viOKm4V0ccy238mU"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/diff.cpp b/doc/examples/diff.cpp
index 982b8f9c7..ee0aefc0b 100644
--- a/doc/examples/diff.cpp
+++ b/doc/examples/diff.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/diff.link b/doc/examples/diff.link
index d0bed27ad..e1cfdb8db 100644
--- a/doc/examples/diff.link
+++ b/doc/examples/diff.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/KKfCy1yctyq7PBI1"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/DKPu3VnNVgsQbaSX"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/dump.cpp b/doc/examples/dump.cpp
index d1359684f..4ffd2aa48 100644
--- a/doc/examples/dump.cpp
+++ b/doc/examples/dump.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/dump.link b/doc/examples/dump.link
index ae5a4abac..2e3fee96b 100644
--- a/doc/examples/dump.link
+++ b/doc/examples/dump.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/HjYnuCSOxokNvsRW"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/0rB2LKUCjPlU90XK"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/emplace.cpp b/doc/examples/emplace.cpp
index 2af633ebc..7e80b68cf 100644
--- a/doc/examples/emplace.cpp
+++ b/doc/examples/emplace.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/emplace.link b/doc/examples/emplace.link
index b689c4762..809cc21e8 100644
--- a/doc/examples/emplace.link
+++ b/doc/examples/emplace.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/mvy0nMn3uStrP9tS"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/xc7HomW1EFM5PV6n"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/emplace_back.cpp b/doc/examples/emplace_back.cpp
index f76e599fc..6a50fd20d 100644
--- a/doc/examples/emplace_back.cpp
+++ b/doc/examples/emplace_back.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/emplace_back.link b/doc/examples/emplace_back.link
index 824c95df2..9397a892c 100644
--- a/doc/examples/emplace_back.link
+++ b/doc/examples/emplace_back.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/wvLvTvPt0dovixFE"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/2WSVQXWzRVuAg5pV"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/empty.cpp b/doc/examples/empty.cpp
index a4c71b529..94bc46a3e 100644
--- a/doc/examples/empty.cpp
+++ b/doc/examples/empty.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/empty.link b/doc/examples/empty.link
index c16e02962..90a6590ef 100644
--- a/doc/examples/empty.link
+++ b/doc/examples/empty.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/g1mZBQAdSJE3cNCH"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/1fN2q9R8yJ9LCSlm"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/end.cpp b/doc/examples/end.cpp
index 5eeec81dc..2984f9eae 100644
--- a/doc/examples/end.cpp
+++ b/doc/examples/end.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/end.link b/doc/examples/end.link
index 4ced3b90c..2695e1d57 100644
--- a/doc/examples/end.link
+++ b/doc/examples/end.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/vp0L5nlCJewdlolt"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/akgHtQw6EFosJSDq"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/erase__IteratorType.cpp b/doc/examples/erase__IteratorType.cpp
index 2ec6204fe..0ba7e6fca 100644
--- a/doc/examples/erase__IteratorType.cpp
+++ b/doc/examples/erase__IteratorType.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/erase__IteratorType.link b/doc/examples/erase__IteratorType.link
index 50571c91b..71d411466 100644
--- a/doc/examples/erase__IteratorType.link
+++ b/doc/examples/erase__IteratorType.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/N0oo892iXEqaUzej"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/LbNMVYCXawbEelo0"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/erase__IteratorType_IteratorType.cpp b/doc/examples/erase__IteratorType_IteratorType.cpp
index ef3f070c2..efbf789e4 100644
--- a/doc/examples/erase__IteratorType_IteratorType.cpp
+++ b/doc/examples/erase__IteratorType_IteratorType.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/erase__IteratorType_IteratorType.link b/doc/examples/erase__IteratorType_IteratorType.link
index fb7fca42b..9209f64cf 100644
--- a/doc/examples/erase__IteratorType_IteratorType.link
+++ b/doc/examples/erase__IteratorType_IteratorType.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/SO3kgH5glqC18wJy"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/KknUwdprg6lIp5YK"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/erase__key_type.cpp b/doc/examples/erase__key_type.cpp
index e035c23bc..592aa020a 100644
--- a/doc/examples/erase__key_type.cpp
+++ b/doc/examples/erase__key_type.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/erase__key_type.link b/doc/examples/erase__key_type.link
index 8a1579c9f..b3ab45ef2 100644
--- a/doc/examples/erase__key_type.link
+++ b/doc/examples/erase__key_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/wyOm5ERfxlXcwcSV"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/IN4AQ9AD1JPDNj9Q"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/erase__size_type.cpp b/doc/examples/erase__size_type.cpp
index 68bbab641..72021bada 100644
--- a/doc/examples/erase__size_type.cpp
+++ b/doc/examples/erase__size_type.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/erase__size_type.link b/doc/examples/erase__size_type.link
index cd20c392f..33a124ca0 100644
--- a/doc/examples/erase__size_type.link
+++ b/doc/examples/erase__size_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/lxSvv5XGZ8Hmhnwl"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/xCM0BG9ZV6iEMdgr"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/find__key_type.cpp b/doc/examples/find__key_type.cpp
index cb4a51c70..c411ba4f6 100644
--- a/doc/examples/find__key_type.cpp
+++ b/doc/examples/find__key_type.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/find__key_type.link b/doc/examples/find__key_type.link
index bf003fb1a..0be7a24ad 100644
--- a/doc/examples/find__key_type.link
+++ b/doc/examples/find__key_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/yqzasB01C3NGORaT"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/iu2BpRtjiKeJu2pv"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/flatten.cpp b/doc/examples/flatten.cpp
index b0cf9b6c0..a69c31d46 100644
--- a/doc/examples/flatten.cpp
+++ b/doc/examples/flatten.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/flatten.link b/doc/examples/flatten.link
index b5285f3c0..4d03de6ba 100644
--- a/doc/examples/flatten.link
+++ b/doc/examples/flatten.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/qGLscdPoE6QH87oD"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/TpEB8tou7Wuyprkm"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/from_cbor.cpp b/doc/examples/from_cbor.cpp
index 5d78be8fa..b0340f17c 100644
--- a/doc/examples/from_cbor.cpp
+++ b/doc/examples/from_cbor.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/from_cbor.link b/doc/examples/from_cbor.link
index 15a2bf404..129e0332c 100644
--- a/doc/examples/from_cbor.link
+++ b/doc/examples/from_cbor.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/DUNMc8fjsGi5C7Ea"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/X9wSCDZNg82T3oix"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/from_msgpack.cpp b/doc/examples/from_msgpack.cpp
index a16c1bdd5..5df9ef3e1 100644
--- a/doc/examples/from_msgpack.cpp
+++ b/doc/examples/from_msgpack.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/from_msgpack.link b/doc/examples/from_msgpack.link
index a4818bd77..7d3a14384 100644
--- a/doc/examples/from_msgpack.link
+++ b/doc/examples/from_msgpack.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/wSkYD6Q5RqJWmt3s"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/9MjZO7niLtZaJIIx"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/front.cpp b/doc/examples/front.cpp
index e9f09d0c1..bbc372e06 100644
--- a/doc/examples/front.cpp
+++ b/doc/examples/front.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/front.link b/doc/examples/front.link
index e3f57b3dc..4f8bcd779 100644
--- a/doc/examples/front.link
+++ b/doc/examples/front.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/fbTQdF5PwEeaC2lq"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/bK69SEGarbCwnqIB"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/get__PointerType.cpp b/doc/examples/get__PointerType.cpp
index 613305f99..29f9ad349 100644
--- a/doc/examples/get__PointerType.cpp
+++ b/doc/examples/get__PointerType.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/get__PointerType.link b/doc/examples/get__PointerType.link
index 5c0713d5a..73a3fc518 100644
--- a/doc/examples/get__PointerType.link
+++ b/doc/examples/get__PointerType.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/YwRJe95xb68JVjuI"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/eMrmXhPWD02HJX9x"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/get__ValueType_const.cpp b/doc/examples/get__ValueType_const.cpp
index 3fdd28347..d78a6b260 100644
--- a/doc/examples/get__ValueType_const.cpp
+++ b/doc/examples/get__ValueType_const.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <unordered_map>
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/get__ValueType_const.link b/doc/examples/get__ValueType_const.link
index d58c17891..7bf5e8a3b 100644
--- a/doc/examples/get__ValueType_const.link
+++ b/doc/examples/get__ValueType_const.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/FeK53w3zimBjOhtB"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/jAZwFrdZS3DgPh1n"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/get_ptr.cpp b/doc/examples/get_ptr.cpp
index 54288450a..27deb1498 100644
--- a/doc/examples/get_ptr.cpp
+++ b/doc/examples/get_ptr.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/get_ptr.link b/doc/examples/get_ptr.link
index 2b158c8f2..6c4a0684c 100644
--- a/doc/examples/get_ptr.link
+++ b/doc/examples/get_ptr.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/6DBW0AukFiY85CMq"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/qnJvFdIQATMPuL6R"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/get_ref.cpp b/doc/examples/get_ref.cpp
index c07d84882..951fea3e4 100644
--- a/doc/examples/get_ref.cpp
+++ b/doc/examples/get_ref.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/get_ref.link b/doc/examples/get_ref.link
index 1181b7c63..d5bb4cfd5 100644
--- a/doc/examples/get_ref.link
+++ b/doc/examples/get_ref.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/868NoVK7iU0BZHKz"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/BbthopNwIhKgb4Y9"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/insert.cpp b/doc/examples/insert.cpp
index 998795665..913ad09db 100644
--- a/doc/examples/insert.cpp
+++ b/doc/examples/insert.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/insert.link b/doc/examples/insert.link
index f3f4e4bc3..803d5c624 100644
--- a/doc/examples/insert.link
+++ b/doc/examples/insert.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Af1lyC9TuTbIaNHy"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/KrT6PSRUrEC3E6cx"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/insert__count.cpp b/doc/examples/insert__count.cpp
index 11460e510..3c2ac24ae 100644
--- a/doc/examples/insert__count.cpp
+++ b/doc/examples/insert__count.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/insert__count.link b/doc/examples/insert__count.link
index 103795f52..a76cd8e29 100644
--- a/doc/examples/insert__count.link
+++ b/doc/examples/insert__count.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/J7tEcc5RiRckp3aH"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/RRGqHw8PbuHfJ2MF"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/insert__ilist.cpp b/doc/examples/insert__ilist.cpp
index fa9e86125..90965b37c 100644
--- a/doc/examples/insert__ilist.cpp
+++ b/doc/examples/insert__ilist.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/insert__ilist.link b/doc/examples/insert__ilist.link
index 13805fbff..387dce696 100644
--- a/doc/examples/insert__ilist.link
+++ b/doc/examples/insert__ilist.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/qgQADJFErGWzwFS3"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/Fouhqv1pfmWQ8h17"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/insert__range.cpp b/doc/examples/insert__range.cpp
index 8e8a5977f..5b0aa9ea6 100644
--- a/doc/examples/insert__range.cpp
+++ b/doc/examples/insert__range.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/insert__range.link b/doc/examples/insert__range.link
index 304407932..cd8107c0b 100644
--- a/doc/examples/insert__range.link
+++ b/doc/examples/insert__range.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/n97dklxei6VGm4nn"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/EWKlbEm2NczIX0Kt"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/insert__range_object.cpp b/doc/examples/insert__range_object.cpp
index 3f266b220..b811f8aa2 100644
--- a/doc/examples/insert__range_object.cpp
+++ b/doc/examples/insert__range_object.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/insert__range_object.link b/doc/examples/insert__range_object.link
index f6eb481aa..7c67093b2 100644
--- a/doc/examples/insert__range_object.link
+++ b/doc/examples/insert__range_object.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/lj1jKDLtLmx2v1G0"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/JewC0qDxdcbAB0oB"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_array.cpp b/doc/examples/is_array.cpp
index 7a5d20bf2..1dbbf5d28 100644
--- a/doc/examples/is_array.cpp
+++ b/doc/examples/is_array.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_array.link b/doc/examples/is_array.link
index ad18000c0..7820d3368 100644
--- a/doc/examples/is_array.link
+++ b/doc/examples/is_array.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/DvtGvyx9zygjT0kS"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/zL2Z6V2oDAYBfsw8"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_boolean.cpp b/doc/examples/is_boolean.cpp
index d3a0e178b..485f97045 100644
--- a/doc/examples/is_boolean.cpp
+++ b/doc/examples/is_boolean.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_boolean.link b/doc/examples/is_boolean.link
index bb89c4a04..9b56f6ed1 100644
--- a/doc/examples/is_boolean.link
+++ b/doc/examples/is_boolean.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Io4dYYukmsvBsBhZ"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/OPxNx0zPQByL6wTD"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_discarded.cpp b/doc/examples/is_discarded.cpp
index f4953bf93..0b0435c36 100644
--- a/doc/examples/is_discarded.cpp
+++ b/doc/examples/is_discarded.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_discarded.link b/doc/examples/is_discarded.link
index 407667aa3..f20d9ce90 100644
--- a/doc/examples/is_discarded.link
+++ b/doc/examples/is_discarded.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/sznqCvDTQxq642QL"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/QRFjILGEmqFv8UTH"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_null.cpp b/doc/examples/is_null.cpp
index 9dd0528c4..3043e1847 100644
--- a/doc/examples/is_null.cpp
+++ b/doc/examples/is_null.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_null.link b/doc/examples/is_null.link
index 6ead545c3..05b270180 100644
--- a/doc/examples/is_null.link
+++ b/doc/examples/is_null.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/imhZMfDkB8bFRp7q"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/28oi4wU44VJlAFuN"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_number.cpp b/doc/examples/is_number.cpp
index a0baff326..08fa138d1 100644
--- a/doc/examples/is_number.cpp
+++ b/doc/examples/is_number.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_number.link b/doc/examples/is_number.link
index 7e291e79d..b1e9ad2a0 100644
--- a/doc/examples/is_number.link
+++ b/doc/examples/is_number.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/PMSuHln29jOu8ySo"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/8ZDtESuv4axwzLWS"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_number_float.cpp b/doc/examples/is_number_float.cpp
index a67d92717..aeef78e85 100644
--- a/doc/examples/is_number_float.cpp
+++ b/doc/examples/is_number_float.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_number_float.link b/doc/examples/is_number_float.link
index 3f56570a9..17208079a 100644
--- a/doc/examples/is_number_float.link
+++ b/doc/examples/is_number_float.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/jf7HjebGYWYKNMJQ"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/TBMRmOeVMVqAqteQ"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_number_integer.cpp b/doc/examples/is_number_integer.cpp
index b8f772ef6..90bd2146d 100644
--- a/doc/examples/is_number_integer.cpp
+++ b/doc/examples/is_number_integer.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_number_integer.link b/doc/examples/is_number_integer.link
index 692d0208d..a35be75d1 100644
--- a/doc/examples/is_number_integer.link
+++ b/doc/examples/is_number_integer.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/1HGdpuy7JGkt6IZd"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/aEbSUBKUmWl7Dtgu"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_number_unsigned.cpp b/doc/examples/is_number_unsigned.cpp
index 7cd04a31b..499530c51 100644
--- a/doc/examples/is_number_unsigned.cpp
+++ b/doc/examples/is_number_unsigned.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_number_unsigned.link b/doc/examples/is_number_unsigned.link
index 930ec4983..0a2ba0205 100644
--- a/doc/examples/is_number_unsigned.link
+++ b/doc/examples/is_number_unsigned.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/nlZ9nbm8xJjTAsMe"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/YRHsTGmB2C2olbOB"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_object.cpp b/doc/examples/is_object.cpp
index 1fe66ec22..a0c03a769 100644
--- a/doc/examples/is_object.cpp
+++ b/doc/examples/is_object.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_object.link b/doc/examples/is_object.link
index 5bfaa41ad..0cf3d4add 100644
--- a/doc/examples/is_object.link
+++ b/doc/examples/is_object.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/5nZW4U1bUA5lem25"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/zMdF7NYFMr9KBEPv"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_primitive.cpp b/doc/examples/is_primitive.cpp
index fb863b61f..ab329bdb4 100644
--- a/doc/examples/is_primitive.cpp
+++ b/doc/examples/is_primitive.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_primitive.link b/doc/examples/is_primitive.link
index aa46ead75..2a0e91b98 100644
--- a/doc/examples/is_primitive.link
+++ b/doc/examples/is_primitive.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/V4emskHeUktlVOxh"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/MnHvWAzSyqxGkMjB"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_string.cpp b/doc/examples/is_string.cpp
index df887007d..44cb483ce 100644
--- a/doc/examples/is_string.cpp
+++ b/doc/examples/is_string.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_string.link b/doc/examples/is_string.link
index b4d8cc39d..f3672db33 100644
--- a/doc/examples/is_string.link
+++ b/doc/examples/is_string.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/lb59ps8hvZkRQtly"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/I8BpwtFc2QJ6Z1Vl"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/is_structured.cpp b/doc/examples/is_structured.cpp
index 66016083e..b7dfc858b 100644
--- a/doc/examples/is_structured.cpp
+++ b/doc/examples/is_structured.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/is_structured.link b/doc/examples/is_structured.link
index ef6804b75..8ea3a75f3 100644
--- a/doc/examples/is_structured.link
+++ b/doc/examples/is_structured.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/oe0ULeAlBAiaqUxh"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/sE3xMx8q6T0EX0qK"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/iterator_wrapper.cpp b/doc/examples/iterator_wrapper.cpp
index 208bb7053..61687a92f 100644
--- a/doc/examples/iterator_wrapper.cpp
+++ b/doc/examples/iterator_wrapper.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/iterator_wrapper.link b/doc/examples/iterator_wrapper.link
index c8f696c3b..0087d9a14 100644
--- a/doc/examples/iterator_wrapper.link
+++ b/doc/examples/iterator_wrapper.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/YkOQK9sqEfbKUF31"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/FYbRVHJSU3rsOSoo"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/json_pointer.cpp b/doc/examples/json_pointer.cpp
index 333d3963d..23e8e84f1 100644
--- a/doc/examples/json_pointer.cpp
+++ b/doc/examples/json_pointer.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/json_pointer.link b/doc/examples/json_pointer.link
index 541a97d8f..3ba4355f7 100644
--- a/doc/examples/json_pointer.link
+++ b/doc/examples/json_pointer.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/JdZq6bQWjrHew4Dy"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/G3xdluSrBF8Zfybi"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/json_pointer__to_string.cpp b/doc/examples/json_pointer__to_string.cpp
index fc7f2557c..70b72778e 100644
--- a/doc/examples/json_pointer__to_string.cpp
+++ b/doc/examples/json_pointer__to_string.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/json_pointer__to_string.link b/doc/examples/json_pointer__to_string.link
index 5cae597ed..b1148125d 100644
--- a/doc/examples/json_pointer__to_string.link
+++ b/doc/examples/json_pointer__to_string.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/t6BQ8xMgkSUIcy1m"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/R67usvQfh9O9kK3u"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/max_size.cpp b/doc/examples/max_size.cpp
index 27989271f..8273f86f4 100644
--- a/doc/examples/max_size.cpp
+++ b/doc/examples/max_size.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/max_size.link b/doc/examples/max_size.link
index 2bca668d9..d49f5ea81 100644
--- a/doc/examples/max_size.link
+++ b/doc/examples/max_size.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/9j9TwfNlZ88Hvwdi"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/Dh9VyEp2fGAbTkUI"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/meta.cpp b/doc/examples/meta.cpp
index 8e4ad3de3..5a7623222 100644
--- a/doc/examples/meta.cpp
+++ b/doc/examples/meta.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/meta.link b/doc/examples/meta.link
index 05b7ef06f..ca5635820 100644
--- a/doc/examples/meta.link
+++ b/doc/examples/meta.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/GTMgDs6Q8uLToRvb"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/M9jbzex4Xj2l25ce"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/object.cpp b/doc/examples/object.cpp
index 3c089b0f9..6c1177583 100644
--- a/doc/examples/object.cpp
+++ b/doc/examples/object.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/object.link b/doc/examples/object.link
index 0a435eb19..f86383349 100644
--- a/doc/examples/object.link
+++ b/doc/examples/object.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/UeOjT4BeGKdE345o"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/GJqwS8AKJxq6aIfN"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__ValueType.cpp b/doc/examples/operator__ValueType.cpp
index 4895fe1e1..2def5271b 100644
--- a/doc/examples/operator__ValueType.cpp
+++ b/doc/examples/operator__ValueType.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <unordered_map>
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/operator__ValueType.link b/doc/examples/operator__ValueType.link
index 84497ae4a..0c32d6319 100644
--- a/doc/examples/operator__ValueType.link
+++ b/doc/examples/operator__ValueType.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/3bM7J4Qlj1Cl9EUK"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/PhHYhHJrFVDCwxJz"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__equal.cpp b/doc/examples/operator__equal.cpp
index e9910f32f..d541a2129 100644
--- a/doc/examples/operator__equal.cpp
+++ b/doc/examples/operator__equal.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__equal.link b/doc/examples/operator__equal.link
index 910bf4496..ae7c25ae6 100644
--- a/doc/examples/operator__equal.link
+++ b/doc/examples/operator__equal.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/D7ff222CtzQaAXUK"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/aj64YWLRD21qZE18"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__equal__nullptr_t.cpp b/doc/examples/operator__equal__nullptr_t.cpp
index d7c2fbdc6..b5d0c6407 100644
--- a/doc/examples/operator__equal__nullptr_t.cpp
+++ b/doc/examples/operator__equal__nullptr_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__equal__nullptr_t.link b/doc/examples/operator__equal__nullptr_t.link
index 300305025..90cc17442 100644
--- a/doc/examples/operator__equal__nullptr_t.link
+++ b/doc/examples/operator__equal__nullptr_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/2PPEeLTQTrbE8cVN"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/LbrZ2kGw20CIeN6s"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__greater.cpp b/doc/examples/operator__greater.cpp
index 1860625cf..a5c4f78a0 100644
--- a/doc/examples/operator__greater.cpp
+++ b/doc/examples/operator__greater.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__greater.link b/doc/examples/operator__greater.link
index f28c8fe07..7f0827910 100644
--- a/doc/examples/operator__greater.link
+++ b/doc/examples/operator__greater.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/whYWnKZxQV8vyrUV"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/ryX5yGEi0FO6jZz2"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__greaterequal.cpp b/doc/examples/operator__greaterequal.cpp
index e1d5d8b77..da014bde9 100644
--- a/doc/examples/operator__greaterequal.cpp
+++ b/doc/examples/operator__greaterequal.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__greaterequal.link b/doc/examples/operator__greaterequal.link
index a03af050c..599f5d7b2 100644
--- a/doc/examples/operator__greaterequal.link
+++ b/doc/examples/operator__greaterequal.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/vIBUY6LRmKBQOgiR"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/b0qsMsIDCrNduuZ7"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__less.cpp b/doc/examples/operator__less.cpp
index 53a595a91..3865847fb 100644
--- a/doc/examples/operator__less.cpp
+++ b/doc/examples/operator__less.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__less.link b/doc/examples/operator__less.link
index 9d8a489a3..0689f995e 100644
--- a/doc/examples/operator__less.link
+++ b/doc/examples/operator__less.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/ZvESrmjGKoagilJr"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/otGM5StP1x4jd5CQ"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__lessequal.cpp b/doc/examples/operator__lessequal.cpp
index 6d82e894d..8e9a21f16 100644
--- a/doc/examples/operator__lessequal.cpp
+++ b/doc/examples/operator__lessequal.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__lessequal.link b/doc/examples/operator__lessequal.link
index 637846fbf..576818511 100644
--- a/doc/examples/operator__lessequal.link
+++ b/doc/examples/operator__lessequal.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/igiFsYkK3wJxbUBe"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/CRVuBTc86hxTNH4X"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__notequal.cpp b/doc/examples/operator__notequal.cpp
index 802447b0a..debcdf8a4 100644
--- a/doc/examples/operator__notequal.cpp
+++ b/doc/examples/operator__notequal.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__notequal.link b/doc/examples/operator__notequal.link
index bf3690926..c23e8263f 100644
--- a/doc/examples/operator__notequal.link
+++ b/doc/examples/operator__notequal.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/NO1FFrAierprHk0j"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/g6U57ryXVuvgwSUB"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__notequal__nullptr_t.cpp b/doc/examples/operator__notequal__nullptr_t.cpp
index e65dcd7c1..8d74e7136 100644
--- a/doc/examples/operator__notequal__nullptr_t.cpp
+++ b/doc/examples/operator__notequal__nullptr_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__notequal__nullptr_t.link b/doc/examples/operator__notequal__nullptr_t.link
index f8be3cbea..49864d342 100644
--- a/doc/examples/operator__notequal__nullptr_t.link
+++ b/doc/examples/operator__notequal__nullptr_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/ejLtGKtacU0xiZV4"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/ywBPZQjmlieF7sv0"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator__value_t.cpp b/doc/examples/operator__value_t.cpp
index dfcf0c3b6..246243c1d 100644
--- a/doc/examples/operator__value_t.cpp
+++ b/doc/examples/operator__value_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operator__value_t.link b/doc/examples/operator__value_t.link
index 2acdc711e..94d67cfd8 100644
--- a/doc/examples/operator__value_t.link
+++ b/doc/examples/operator__value_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/hVycygNLPkyFqvN5"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/daNU6Fj8JuV07nBn"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator_deserialize.cpp b/doc/examples/operator_deserialize.cpp
index bf9d77959..06656b650 100644
--- a/doc/examples/operator_deserialize.cpp
+++ b/doc/examples/operator_deserialize.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/operator_deserialize.link b/doc/examples/operator_deserialize.link
index caf6025a5..4544a65be 100644
--- a/doc/examples/operator_deserialize.link
+++ b/doc/examples/operator_deserialize.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/yeEdM1SY7CloqFt3"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/doaPmtdJ277jNm9C"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operator_serialize.cpp b/doc/examples/operator_serialize.cpp
index 1d817816f..d808e8696 100644
--- a/doc/examples/operator_serialize.cpp
+++ b/doc/examples/operator_serialize.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/operator_serialize.link b/doc/examples/operator_serialize.link
index 104ce0fdf..9d5d01024 100644
--- a/doc/examples/operator_serialize.link
+++ b/doc/examples/operator_serialize.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/ibCUjqfsQiAglDVe"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/0Ec7N50CDWAWPWEE"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operatorarray__key_type.cpp b/doc/examples/operatorarray__key_type.cpp
index 2438f991e..a42335a3e 100644
--- a/doc/examples/operatorarray__key_type.cpp
+++ b/doc/examples/operatorarray__key_type.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/operatorarray__key_type.link b/doc/examples/operatorarray__key_type.link
index 7990937bb..829617056 100644
--- a/doc/examples/operatorarray__key_type.link
+++ b/doc/examples/operatorarray__key_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/4y25Szh3rTn8pQJg"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/iG5QR4oqgCLaEedf"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operatorarray__key_type_const.cpp b/doc/examples/operatorarray__key_type_const.cpp
index 36aa1db22..2320e439e 100644
--- a/doc/examples/operatorarray__key_type_const.cpp
+++ b/doc/examples/operatorarray__key_type_const.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operatorarray__key_type_const.link b/doc/examples/operatorarray__key_type_const.link
index 3b6f2f4aa..53a089249 100644
--- a/doc/examples/operatorarray__key_type_const.link
+++ b/doc/examples/operatorarray__key_type_const.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/KYhKymZiVPxCBzVc"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/Ee3J5N5Gn6ANooov"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operatorarray__size_type.cpp b/doc/examples/operatorarray__size_type.cpp
index 27d7d9efd..bc8ecb96d 100644
--- a/doc/examples/operatorarray__size_type.cpp
+++ b/doc/examples/operatorarray__size_type.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operatorarray__size_type.link b/doc/examples/operatorarray__size_type.link
index e978214ea..3e05678b9 100644
--- a/doc/examples/operatorarray__size_type.link
+++ b/doc/examples/operatorarray__size_type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/L1c3a41KITuzSwVS"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/21HxgPDhXEGvFC6C"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operatorarray__size_type_const.cpp b/doc/examples/operatorarray__size_type_const.cpp
index 44264172a..ec9fc30f3 100644
--- a/doc/examples/operatorarray__size_type_const.cpp
+++ b/doc/examples/operatorarray__size_type_const.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operatorarray__size_type_const.link b/doc/examples/operatorarray__size_type_const.link
index 3dc0ce3e5..2eb1a380a 100644
--- a/doc/examples/operatorarray__size_type_const.link
+++ b/doc/examples/operatorarray__size_type_const.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/O42CoAYuvKv9qsjI"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/IyS4nyuQg9OS8FaF"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operatorjson_pointer.cpp b/doc/examples/operatorjson_pointer.cpp
index 63b233d2f..d40366732 100644
--- a/doc/examples/operatorjson_pointer.cpp
+++ b/doc/examples/operatorjson_pointer.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operatorjson_pointer.link b/doc/examples/operatorjson_pointer.link
index 67b3be466..92bf9d772 100644
--- a/doc/examples/operatorjson_pointer.link
+++ b/doc/examples/operatorjson_pointer.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/5BiKWmmo8E6cZ5ya"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/r7jZiTjekxAmg70w"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/operatorjson_pointer_const.cpp b/doc/examples/operatorjson_pointer_const.cpp
index 8f3bc6134..52b2a9e89 100644
--- a/doc/examples/operatorjson_pointer_const.cpp
+++ b/doc/examples/operatorjson_pointer_const.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/operatorjson_pointer_const.link b/doc/examples/operatorjson_pointer_const.link
index 38d54c6d7..22a7c5cb6 100644
--- a/doc/examples/operatorjson_pointer_const.link
+++ b/doc/examples/operatorjson_pointer_const.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/t2CPGGr35iE5Ccsd"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/MtaIF9fNY9WPXrUG"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__array__parser_callback_t.cpp b/doc/examples/parse__array__parser_callback_t.cpp
index 790cc21df..5681178d1 100644
--- a/doc/examples/parse__array__parser_callback_t.cpp
+++ b/doc/examples/parse__array__parser_callback_t.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/parse__array__parser_callback_t.link b/doc/examples/parse__array__parser_callback_t.link
index 76e50355b..0830fdacb 100644
--- a/doc/examples/parse__array__parser_callback_t.link
+++ b/doc/examples/parse__array__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/chPjGeanDIb5ce5Y"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/fs7n9Xh41pSIxK4g"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp b/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp
index c953fe672..ab551b0c6 100644
--- a/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp
+++ b/doc/examples/parse__contiguouscontainer__parser_callback_t.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/parse__contiguouscontainer__parser_callback_t.link b/doc/examples/parse__contiguouscontainer__parser_callback_t.link
index 27f6f961b..1e65c1f0e 100644
--- a/doc/examples/parse__contiguouscontainer__parser_callback_t.link
+++ b/doc/examples/parse__contiguouscontainer__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/6N1uGjyG56Cgp856"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/2cJ6aEoQItmXOyEe"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__istream__parser_callback_t.cpp b/doc/examples/parse__istream__parser_callback_t.cpp
index 1d25f7051..562ab9684 100644
--- a/doc/examples/parse__istream__parser_callback_t.cpp
+++ b/doc/examples/parse__istream__parser_callback_t.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/parse__istream__parser_callback_t.link b/doc/examples/parse__istream__parser_callback_t.link
index f1552bf62..737c8dda9 100644
--- a/doc/examples/parse__istream__parser_callback_t.link
+++ b/doc/examples/parse__istream__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/hRc62HHoix373ban"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/IvIGk03HXpuyv271"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__iteratortype__parser_callback_t.cpp b/doc/examples/parse__iteratortype__parser_callback_t.cpp
index 1d7520526..9a3e12e48 100644
--- a/doc/examples/parse__iteratortype__parser_callback_t.cpp
+++ b/doc/examples/parse__iteratortype__parser_callback_t.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/parse__iteratortype__parser_callback_t.link b/doc/examples/parse__iteratortype__parser_callback_t.link
index f48f2fd1f..e49ebc8d7 100644
--- a/doc/examples/parse__iteratortype__parser_callback_t.link
+++ b/doc/examples/parse__iteratortype__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Tt8SS2LJXvi0fuUc"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/a8XRIpnVOQp3zYKV"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/parse__string__parser_callback_t.cpp b/doc/examples/parse__string__parser_callback_t.cpp
index b044eb321..ea02c330c 100644
--- a/doc/examples/parse__string__parser_callback_t.cpp
+++ b/doc/examples/parse__string__parser_callback_t.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/parse__string__parser_callback_t.link b/doc/examples/parse__string__parser_callback_t.link
index 3b44d9dc7..535ecd2bc 100644
--- a/doc/examples/parse__string__parser_callback_t.link
+++ b/doc/examples/parse__string__parser_callback_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Wvsf6dhxhscpNbx8"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/JZ8P4ruGJTLfOFHJ"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/patch.cpp b/doc/examples/patch.cpp
index ad30b78ba..c844b970e 100644
--- a/doc/examples/patch.cpp
+++ b/doc/examples/patch.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 #include <iomanip> // for std::setw
 
diff --git a/doc/examples/patch.link b/doc/examples/patch.link
index 939971495..7844cd941 100644
--- a/doc/examples/patch.link
+++ b/doc/examples/patch.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/UoObrzN9bFBGX8ph"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/U9n8nunch9ti8XlQ"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/push_back.cpp b/doc/examples/push_back.cpp
index 8d1b1c5e0..7b0ec488c 100644
--- a/doc/examples/push_back.cpp
+++ b/doc/examples/push_back.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/push_back.link b/doc/examples/push_back.link
index efb1b6bdc..dc2b525e2 100644
--- a/doc/examples/push_back.link
+++ b/doc/examples/push_back.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/Y6RwbyukIqP7axhL"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/nXx2jBB2mfhTui2x"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/push_back__initializer_list.cpp b/doc/examples/push_back__initializer_list.cpp
index 443c36393..d231e710c 100644
--- a/doc/examples/push_back__initializer_list.cpp
+++ b/doc/examples/push_back__initializer_list.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/push_back__initializer_list.link b/doc/examples/push_back__initializer_list.link
index bb56fb16b..f6796c25a 100644
--- a/doc/examples/push_back__initializer_list.link
+++ b/doc/examples/push_back__initializer_list.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/EGWCBZOQQ4WbZl6V"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/Pkordpr08QOqwQ5S"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/push_back__object_t__value.cpp b/doc/examples/push_back__object_t__value.cpp
index fe3318c0a..27215fb8f 100644
--- a/doc/examples/push_back__object_t__value.cpp
+++ b/doc/examples/push_back__object_t__value.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/push_back__object_t__value.link b/doc/examples/push_back__object_t__value.link
index 0fad4a347..375315e46 100644
--- a/doc/examples/push_back__object_t__value.link
+++ b/doc/examples/push_back__object_t__value.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/OJH4Aq6qDiGRqXNo"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/YMP7YqusA4FVCXd8"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/rbegin.cpp b/doc/examples/rbegin.cpp
index c4f632ebf..2e9824b4b 100644
--- a/doc/examples/rbegin.cpp
+++ b/doc/examples/rbegin.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/rbegin.link b/doc/examples/rbegin.link
index a780148a8..341742186 100644
--- a/doc/examples/rbegin.link
+++ b/doc/examples/rbegin.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/F9EE9JBnMu2KgCC3"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/ntIP2dRz12dM8cBi"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/rend.cpp b/doc/examples/rend.cpp
index d746ab4f7..0c81da12a 100644
--- a/doc/examples/rend.cpp
+++ b/doc/examples/rend.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/rend.link b/doc/examples/rend.link
index 9d33126d9..7c9360bdb 100644
--- a/doc/examples/rend.link
+++ b/doc/examples/rend.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/uv1nLqTKpZOwvofB"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/bwTPFmGISMU3mBoH"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/size.cpp b/doc/examples/size.cpp
index 341864995..07d1b6cdb 100644
--- a/doc/examples/size.cpp
+++ b/doc/examples/size.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/size.link b/doc/examples/size.link
index 6b27e7b9e..9042e08e0 100644
--- a/doc/examples/size.link
+++ b/doc/examples/size.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/uBVNNjgvYuX7rcIO"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/a0lRgHqcBsG9bezj"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/swap__array_t.cpp b/doc/examples/swap__array_t.cpp
index b58c02c4d..c83556eea 100644
--- a/doc/examples/swap__array_t.cpp
+++ b/doc/examples/swap__array_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/swap__array_t.link b/doc/examples/swap__array_t.link
index ed7862c86..7562e7843 100644
--- a/doc/examples/swap__array_t.link
+++ b/doc/examples/swap__array_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/2aZmrP2xuWIiZOfd"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/vesMGROXLwOW7kTf"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/swap__object_t.cpp b/doc/examples/swap__object_t.cpp
index 15f061de9..d67801c4a 100644
--- a/doc/examples/swap__object_t.cpp
+++ b/doc/examples/swap__object_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/swap__object_t.link b/doc/examples/swap__object_t.link
index 6dd2dc186..cc6a18bb5 100644
--- a/doc/examples/swap__object_t.link
+++ b/doc/examples/swap__object_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/cZGcQj8OrkPrXX9d"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/PnS7jOq2cgJMwm6w"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/swap__reference.cpp b/doc/examples/swap__reference.cpp
index ee0336514..5223950cd 100644
--- a/doc/examples/swap__reference.cpp
+++ b/doc/examples/swap__reference.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/swap__reference.link b/doc/examples/swap__reference.link
index 6bb80015d..8c906769a 100644
--- a/doc/examples/swap__reference.link
+++ b/doc/examples/swap__reference.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/BYPsq3iXyU04hqpi"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/XO1V5cnmK17G277z"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/swap__string_t.cpp b/doc/examples/swap__string_t.cpp
index 87ee1ed8c..aeea028bd 100644
--- a/doc/examples/swap__string_t.cpp
+++ b/doc/examples/swap__string_t.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/swap__string_t.link b/doc/examples/swap__string_t.link
index 5d204f86e..29c2f9d00 100644
--- a/doc/examples/swap__string_t.link
+++ b/doc/examples/swap__string_t.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/jtBO4VQr09xU8hfX"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/SgGHz0fYGWTCFwCH"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/to_cbor.cpp b/doc/examples/to_cbor.cpp
index a4fbfbf1c..bdffe5eb9 100644
--- a/doc/examples/to_cbor.cpp
+++ b/doc/examples/to_cbor.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/to_cbor.link b/doc/examples/to_cbor.link
index 06695fec4..ab6582535 100644
--- a/doc/examples/to_cbor.link
+++ b/doc/examples/to_cbor.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/tMjlClOSnAhY0BDg"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/m6XKVQBrhB6jXGOe"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/to_msgpack.cpp b/doc/examples/to_msgpack.cpp
index 5e0d18842..7756a9e69 100644
--- a/doc/examples/to_msgpack.cpp
+++ b/doc/examples/to_msgpack.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/to_msgpack.link b/doc/examples/to_msgpack.link
index 904a65401..12014fb0e 100644
--- a/doc/examples/to_msgpack.link
+++ b/doc/examples/to_msgpack.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/CeF2b7iKuvSnNZaV"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/b66iY9hOdCHEG8FV"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/type.cpp b/doc/examples/type.cpp
index eb764bf29..b712a8522 100644
--- a/doc/examples/type.cpp
+++ b/doc/examples/type.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/type.link b/doc/examples/type.link
index c4d92739d..3fedc6809 100644
--- a/doc/examples/type.link
+++ b/doc/examples/type.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/om8MTJzY1FlDzxxS"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/zlWezYhiRTnLzrSj"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/type_name.cpp b/doc/examples/type_name.cpp
index b849c10a0..470d0a65a 100644
--- a/doc/examples/type_name.cpp
+++ b/doc/examples/type_name.cpp
@@ -1,3 +1,4 @@
+#include <iostream>
 #include "json.hpp"
 
 using json = nlohmann::json;
diff --git a/doc/examples/type_name.link b/doc/examples/type_name.link
index 8f36e649e..7f50a3988 100644
--- a/doc/examples/type_name.link
+++ b/doc/examples/type_name.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/t8yj12vJog4NagqL"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/dKXdftLJYVnkE3Vg"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/unflatten.cpp b/doc/examples/unflatten.cpp
index f17e10ce2..6318f8597 100644
--- a/doc/examples/unflatten.cpp
+++ b/doc/examples/unflatten.cpp
@@ -1,5 +1,6 @@
-#include "json.hpp"
+#include <iostream>
 #include <iomanip> // for std::setw
+#include "json.hpp"
 
 using json = nlohmann::json;
 
diff --git a/doc/examples/unflatten.link b/doc/examples/unflatten.link
index 71d3d55d4..6caa6a57e 100644
--- a/doc/examples/unflatten.link
+++ b/doc/examples/unflatten.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/aOxMXevnLZteNqkg"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/WKkNkEuGbsxPknyT"><b>online</b></a>
\ No newline at end of file