Docs: add notes about enabling C4062 on msvc

Resolves #49.

[skip ci]

README.md

@@ -61,7 +61,7 @@ Simply add `enum.h` to your project.
 
 ## Limitations
 
-The biggest limitation is that the `BETTER_ENUM` macro can't be used inside a
+1. The biggest limitation is that the `BETTER_ENUM` macro can't be used inside a
 class. This seems [difficult to remove][nested]. There is a workaround with
 `typedef` (or C++11 `using`):
 
@@ -78,11 +78,11 @@ 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
+2. 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
+3. 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:
 
@@ -90,8 +90,11 @@ a comparison:
     channel == +Channel::Red
     ```
 
+4. On msvc, you may need to enable [warning C4062][C4062] to get `switch` case exhaustiveness checking.
+
 [nested]: http://aantron.github.io/better-enums/DesignDecisionsFAQ.html#NoEnumInsideClass
 [extend]: http://aantron.github.io/better-enums/ExtendingLimits.html
+[C4062]: https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4062
 
 <br/>
 

doc/tutorial/4-switch.md

@@ -21,6 +21,10 @@ A Better Enum can be used directly in a `switch` statement:
 If you miss a case or add a redundant one, your compiler should be able to give
 you a warning — try it!
 
+Note that on msvc, you may need to enable [warning C4062][C4062].
+
+[C4062]: https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4062
+
 ---
 
         std::cout << n << std::endl;

example/4-switch.cc

@@ -22,6 +22,8 @@ int main()
 
 // If you miss a case or add a redundant one, your compiler should be able to
 // give you a warning - try it!
+//
+// Note that on msvc, you may need to enable warning C4062.
 
 
     std::cout << n << std::endl;