How to Explicitly Convert Strongly Typed Enums to Integers in C ?

Automatically Converting a Strongly Typed Enum into Integer Type

In C , strongly typed enums ensure greater type safety than traditional enums. However, unlike traditional enums, strongly typed enums cannot be implicitly converted to integer types.

To convert a strongly typed enum value E into an integer type, an explicit cast is required, such as:

<code class="cpp">int i = static_cast<int>(b::B2);</int></code>

However, if the underlying type of the enum is unknown, the following template function can be used:

<code class="cpp">template <typename e>
constexpr typename std::underlying_type<e>::type to_underlying(E e) noexcept {
    return static_cast<typename std::underlying_type>::type>(e);
}</typename></e></typename></code>

Now, the conversion can be performed without specifying the underlying type explicitly:

<code class="cpp">std::cout <p>It's important to note that this conversion only works for values of strongly typed enums. If a traditional enum value is provided to to_underlying(), an error will be raised.</p></code>

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