Updates from Overleaf

HappyCerberus · HappyCerberus · commit e7e556ca8837 · 2022-09-28T18:34:39.000+02:00
diff --git a/chapters/00_title_page.tex b/chapters/00_title_page.tex
@@ -30,6 +30,8 @@
 
 Original copy of this book can be obtained at \href{https://github.com/HappyCerberus/book-cpp-algorithms}{https://github.com/HappyCerberus/book-cpp-algorithms}.
 
+The book is also available through LeanPub where the proceeds go to Electronic Frontier Foundation (after LeanPub takes their cut) \href{https://leanpub.com/cpp-algorithms-guide}{https://leanpub.com/cpp-algorithms-guide}.
+
 This copy of the book is version \version.
 
 \vfill
diff --git a/chapters/90_theory.tex b/chapters/90_theory.tex
@@ -58,4 +58,10 @@ \subsection{Function objects vs ADL}
 \footnotesize Example demonstrating a non-function object preventing ADL, making a friend function impossible to invoke.
 \tcblower
 \cppfile{code_examples/theory/adl_shutdown_code.h}
-\end{box-note}
+\end{box-note}
+
+\subsection{\texorpdfstring{\CC20 ADL customization point}{C++20 ADL customization point}}
+
+With the introduction of concepts in \CC20, we now have a cleaner way to introduce a customization point using ADL.
+
+This approach has several benefits, in particular on the call site. We no longer need to remember to pull in the namespace of the default implementation. Furthermore, because the call is now fully qualified, we avoid the problem of symbol collisions that can potentially completely prevent ADL.
