custom_iterator

README.adoc

@@ -20213,6 +20213,13 @@ Programs under link:userland/cpp/[] are examples of https://en.wikipedia.org/wik
 *** link:userland/cpp/multimap.cpp[]: `std::multimap`
 ** <<algorithms>> contains a benchmark comparison of different c++ containers
 
+[[cpp-standards]]
+==== C++ standards
+
+Like for C, you have to pay for the standards... insane. So we just use the closest free drafts instead.
+
+https://stackoverflow.com/questions/81656/where-do-i-find-the-current-c-or-c-standard-documents
+
 [[cpp-initialization-types]]
 ==== C++ initialization types
 
@@ -20470,13 +20477,6 @@ https://stackoverflow.com/questions/51031060/are-c17-parallel-algorithms-impleme
 
 link:userland/cpp/parallel_sort.cpp[]
 
-[[cpp-standards]]
-==== C++ standards
-
-Like for C, you have to pay for the standards... insane. So we just use the closest free drafts instead.
-
-https://stackoverflow.com/questions/81656/where-do-i-find-the-current-c-or-c-standard-documents
-
 [[cpp17]]
 ===== C++17 N4659 standards draft
 
@@ -20517,6 +20517,20 @@ Replaces decltype with type of an expression at compile time.
 
 More powerful than `auto` as you can use it in more places.
 
+[[cpp-concepts]]
+==== C++ concepts
+
+[[cpp-iterators]]
+===== C++ iterators
+
+https://stackoverflow.com/questions/37031805/preparation-for-stditerator-being-deprecated/38103394
+
+link:userland/cpp/custom_iterator.cpp[]: there is no way to easily define a nice custom iterator, you just have to wrap existing iterators and add a gazillion wrapper methods:
+
+* https://stackoverflow.com/questions/8054273/how-to-implement-an-stl-style-iterator-and-avoid-common-pitfalls
+* https://stackoverflow.com/questions/3582608/how-to-correctly-implement-custom-iterators-and-const-iterators
+* https://stackoverflow.com/questions/6471019/can-should-i-inherit-from-an-stl-iterator
+
 === POSIX
 
 Programs under link:userland/posix/[] are examples of POSIX C programming.