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AMReX Enum: Underlying Value #4616

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AMReX Enum: Underlying Value #4616

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11 changes: 11 additions & 0 deletions Src/Base/AMReX_Enum.H
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Original file line number Diff line number Diff line change
Expand Up @@ -128,6 +128,17 @@ namespace amrex
{
return std::string(ET::class_name);
}

/** Return the underlying (u)int of an enum value
*
* Useful when building bitmasks.
*/
template <typename T, typename ET = amrex_enum_traits<T>,
std::enable_if_t<ET::value,int> = 0>
constexpr auto getEnumUnderlyingValue (T v) noexcept
{
return static_cast<std::underlying_type_t<T>>(v);
}
Comment on lines +136 to +141
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I can make T also an int, because we hard-code int in AMREX_ENUM for now. Let me know what you prefer.

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I think this is fine.

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https://en.cppreference.com/w/cpp/utility/to_underlying.html We could also use a name that is similar to the future C++ standard, like toUnderlying.

}

#define AMREX_ENUM(CLASS, ...) \
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