Incorporated errata.

Fixes #13.
Fixes #14.

[ci skip]

README.md

@@ -76,13 +76,25 @@ triplet::Color  color;
 
 You can, however, use `BETTER_ENUM` inside a namespace.
 
+The macro has a soft limit of 64 declared constants. You can extend it by
+following [these instructions][extend]. Ultimately, the number of constants is
+limited by your compiler's maximum macro argument count.
+
+In some cases, it is necessary to prefix constants such as `Channel::Red` with a
+`+` to explicitly promote them to type `Channel`. For example, if you are doing
+a comparison:
+
+```
+channel == +Channel::Red
+```
+
 [nested]: http://aantron.github.io/better-enums/DesignDecisionsFAQ.html#NoEnumInsideClass
+[extend]: http://aantron.github.io/better-enums/ExtendingLimits.html
 
 ## Contact and development
 
 Don't hesitate to contact me about features or bugs:
-[antonbachin@yahoo.com][email], Twitter [@better_enums][twitter], or open an
-issue on GitHub.
+[antonbachin@yahoo.com][email], or open an issue on GitHub.
 
 If you'd like to help develop Better Enums, see [CONTRIBUTING][contributing].
 
@@ -90,7 +102,6 @@ If you'd like to help develop Better Enums, see [CONTRIBUTING][contributing].
 [![AppVeyor status][appveyor-img]][appveyor]
 
 [email]:        mailto:antonbachin@yahoo.com
-[twitter]:      https://twitter.com/better_enums
 [contributing]: https://github.com/aantron/better-enums/blob/master/doc/CONTRIBUTING.md
 [stable]:       https://img.shields.io/badge/master-kept_stable-brightgreen.svg
 [commits]:      https://github.com/aantron/better-enums/blob/master/doc/CONTRIBUTING.md#commits

doc/ExtendingLimits.md

@@ -34,6 +34,17 @@ constants of full-`constexpr` enums. To extend:
      - With CMake, you may need something like
        `add_definitions(-DBETTER_ENUMS_MACRO_FILE="$${CMAKE_SOURCE_DIR}/src/enum-macros.h")`
 
+     You can also create a new header file that defines this macro, and then
+     includes `enum.h`. Then, include your new file everywhere where you would
+     otherwise include `enum.h`:
+
+     ~~~comment
+     <em>#pragma once
+
+     #define BETTER_ENUMS_MACRO_FILE <common/enum_macros.h>
+     #include <enum.h></em>
+     ~~~
+
   6. Enjoy the looser limits. Just watch out &mdash; increasing the second
      number can really slow down compilation of full-`constexpr` enums.
   7. You don't need `make_macros.py` anymore. It's not part of your build

doc/demo/105-c++17-reflection.md

@@ -45,11 +45,10 @@ Resulting in the values `3`, `Foo::A`, and `"B"`, respectively.
 ---
 
 The interface is implemented in the optional header file
-[`extra/better-enums/n4428.h`][header]. There are two necessary differences.
-
-1. The interface is only available for enums declared through the `BETTER_ENUM`
-   macro. This is because the macro is what generates the information necessary
-   for reflection.
+[`extra/better-enums/n4428.h`][header]. There is a necessary difference: the
+interface is only available for enums declared through the `BETTER_ENUM` macro.
+This is because the macro is what generates the information necessary for
+reflection.
 
 ### Demo
 

doc/tutorial/7-safety.md

@@ -3,6 +3,12 @@
 This tutorial shows some of the safety features of Better Enums: scope, how to
 control conversions, and the lack of a default constructor.
 
+On balance, Better Enums are in one way less type-safe than enum class, and in
+another way more type-safe. The first difference in safety is the presence of
+implicit conversion to integral types. The second difference is the lack of a
+default constructor. Both of these can be toggled, so you can make Better Enums
+strictly safer than enum class, or just as safe.
+
 $internal_toc
 
 ### Scope
@@ -47,6 +53,11 @@ will not compile:
 The reason this is not enabled by default is explained in the reference page on
 [strict conversions](${prefix}OptInFeatures.html#StrictConversions).
 
+You can conveniently define the macro on your compiler's command line, or by
+creating a little header file that defines it, and then includes
+<code>enum.h</code>. You can then include this new header file in your project
+everywhere where you would have included <code>enum.h</code>.
+
 ### Default constructor
 
 Better Enums generate without a default constructor. The purpose is to support

example/105-c++17-reflection.cc

@@ -41,11 +41,9 @@
 // Resulting in the values 3, Foo::A, and "B", respectively.
 
 // The interface is implemented in the optional header file
-// extra/better-enums/n4428.h. There are two necessary differences.
-//
-//   1. The interface is only available for enums declared through the
-//      BETTER_ENUM macro. This is because the macro is what generates the
-//      information necessary for reflection.
+// extra/better-enums/n4428.h. There is a necessary difference: the interface is
+// only available for enums declared through the BETTER_ENUM macro. This is
+// because the macro is what generates the information necessary for reflection.
 //
 // Demo
 //

example/7-safety.cc

@@ -5,6 +5,12 @@
 // This tutorial shows some of the safety features of Better Enums: scope, how
 // to control conversions, and the lack of a default constructor.
 //
+// On balance, Better Enums are in one way less type-safe than enum class, and
+// in another way more type-safe. The first difference in safety is the presence
+// of implicit conversion to integral types. The second difference is the lack
+// of a default constructor. Both of these can be toggled, so you can make
+// Better Enums strictly safer than enum class, or just as safe.
+//
 // Scope
 //
 // You have probably noticed by now that Better Enums are scoped: when you
@@ -45,28 +51,20 @@ int main()
 // The reason this is not enabled by default is explained in the reference page
 // on strict conversions.
 //
+// You can conveniently define the macro on your compiler's command line, or by
+// creating a little header file that defines it, and then includes enum.h. You
+// can then include this new header file in your project everywhere where you
+// would have included enum.h.
+//
 // Default constructor
 //
-// Better Enums don't have a default constructor, for three reasons.
-//
-//   1. Better Enums is a library that can't know what your application would
-//      like the default value to be for each enum, or whether you even want
-//      one.
-//   2. I chose not to leave the default value undefined, because the idea is to
-//      encourage the convention that whenever a Better Enum exists, it has a
-//      valid value. This is borrowed from typed functional programming.
-//   3. Better Enums is still under development, and this option is the most
-//      future-proof.
-//
-// So, if you uncomment this code, the file won't compile:
+// Better Enums generate without a default constructor. The purpose is to
+// support the convention where if a Better Enum exists, then it has a valid
+// value. So, if you uncomment this code, the program won't compile:
 //
 //     Channel      channel;
 //
-// This may be too strict, and I may relax it in the future. In the meantime,
-// the solution sketched in the special values demo can replace default
-// constructors for some purposes, and in a more flexible way. I may eventually
-// have the default constructor calling a template function like the one in that
-// demo.
+// If this is too strict for your project, you can relax it as described here.
 
 
     return 0;