[skip ci] Correct URLs for reference [10] Generic<Programming>: Discr…

…iminated Unions

README.md

@@ -3,19 +3,34 @@
 [![Language](https://img.shields.io/badge/C%2B%2B-98/11-blue.svg)](https://en.wikipedia.org/wiki/C%2B%2B#Standardization) [![License](https://img.shields.io/badge/license-BSL-blue.svg)](https://opensource.org/licenses/BSL-1.0) [![Build Status](https://github.com/martinmoene/optional-lite/actions/workflows/ci.yml/badge.svg)](https://github.com/martinmoene/optional-lite/actions/workflows/ci.yml) [![Build status](https://ci.appveyor.com/api/projects/status/1oq5gjm7bufrv6ib?svg=true)](https://ci.appveyor.com/project/martinmoene/optional-lite) [![Version](https://badge.fury.io/gh/martinmoene%2Foptional-lite.svg)](https://github.com/martinmoene/optional-lite/releases) [![download](https://img.shields.io/badge/latest-download-blue.svg)](https://raw.githubusercontent.com/martinmoene/optional-lite/master/include/nonstd/optional.hpp) [![Conan](https://img.shields.io/badge/on-conan-blue.svg)](https://conan.io/center/optional-lite) [![Try it online](https://img.shields.io/badge/on-wandbox-blue.svg)](https://wandbox.org/permlink/bfZdDT4WerPNZi6b) [![Try it on godbolt online](https://img.shields.io/badge/on-godbolt-blue.svg)](https://godbolt.org/z/3tecRa)
 
 **Contents**  
-- [Example usage](#example-usage)
-- [In a nutshell](#in-a-nutshell)
-- [License](#license)
-- [Dependencies](#dependencies)
-- [Installation](#installation)
-- [Synopsis](#synopsis)
-- [Comparison of std::optional, optional lite and Boost.Optional](#comparison-of-stdoptional-optional-lite-and-boostoptional)
-- [Reported to work with](#reported-to-work-with)
-- [Building the tests](#building-the-tests)
-- [Implementation notes](#implementation-notes)
-- [Other implementations of optional](#other-implementations-of-optional)
-- [Notes and references](#notes-and-references)
-- [Appendix](#appendix)
+- [optional lite: A single-file header-only version of a C++17-like optional, a nullable object for C++98, C++11 and later](#optional-lite-a-single-file-header-only-version-of-a-c17-like-optional-a-nullable-object-for-c98-c11-and-later)
+  - [Example usage](#example-usage)
+    - [Compile and run](#compile-and-run)
+  - [In a nutshell](#in-a-nutshell)
+  - [License](#license)
+  - [Dependencies](#dependencies)
+  - [Installation](#installation)
+  - [Synopsis](#synopsis)
+    - [Types and values in namespace nonstd](#types-and-values-in-namespace-nonstd)
+    - [Interface of *optional lite*](#interface-of-optional-lite)
+    - [Algorithms for *optional lite*](#algorithms-for-optional-lite)
+    - [Configuration](#configuration)
+      - [Tweak header](#tweak-header)
+      - [Standard selection macro](#standard-selection-macro)
+      - [Select `std::optional` or `nonstd::optional`](#select-stdoptional-or-nonstdoptional)
+      - [Disable extensions](#disable-extensions)
+      - [Disable exceptions](#disable-exceptions)
+      - [Macros to control alignment](#macros-to-control-alignment)
+  - [Comparison of std::optional, optional lite and Boost.Optional](#comparison-of-stdoptional-optional-lite-and-boostoptional)
+  - [Reported to work with](#reported-to-work-with)
+  - [Building the tests](#building-the-tests)
+  - [Implementation notes](#implementation-notes)
+    - [Object allocation and alignment](#object-allocation-and-alignment)
+  - [Other implementations of optional](#other-implementations-of-optional)
+  - [Notes and references](#notes-and-references)
+  - [Appendix](#appendix)
+    - [A.1 Compile-time information](#a1-compile-time-information)
+    - [A.2 Optional Lite test specification](#a2-optional-lite-test-specification)
 
 ## Example usage
 
@@ -388,7 +403,7 @@ For more information on constructed unions and alignment, see [10-14].
 
 [9] Fernando Cacciola. [Boost.Optional Quick start guide](http://www.boost.org/doc/libs/1_57_0/libs/optional/doc/html/boost_optional/quick_start.html).
 
-[10] Andrei Alexandrescu. [Generic<Programming>: Discriminated Unions part 1](http://collaboration.cmc.ec.gc.ca/science/rpn/biblio/ddj/Website/articles/CUJ/2002/cexp2004/alexandr/alexandr.htm), [part 2](http://collaboration.cmc.ec.gc.ca/science/rpn/biblio/ddj/Website/articles/CUJ/2002/cexp2006/alexandr/alexandr.htm), [part 3](http://collaboration.cmc.ec.gc.ca/science/rpn/biblio/ddj/Website/articles/CUJ/2002/cexp2008/alexandr/alexandr.htm). April 2002.
+[10] Andrei Alexandrescu. [Generic<Programming>: Discriminated Unions part 1](http://erdani.org/publications/cuj-04-2002.php.html), [part 2](http://erdani.org/publications/cuj-06-2002.php.html), [part 3](http://erdani.org/publications/cuj-08-2002.php.html). April 2002.
 
 [11] Herb Sutter. [Style Case Study #3: Construction Unions](http://www.gotw.ca/gotw/085.htm). GotW #85. 2009