internal

Functions

```
template <typename E, E V>
```
```
bool IsValidEnum ()
```
Check if |V| is a valid enum value of type E.

This uses the compiler's __PRETTY_FUNCTION__ feature: For non-enum values,

the value of __PRETTY_FUNCTION__ looks like:

"constexpr bool IsValidEnum() [with E = Enum; E V = (Enum)0]"

However, for defined enum values, the value looks like:

"constexpr bool IsValidEnum() [with E = Enum; E V = Enum::IDENTIFIER]"

We can check whether if the value of |V| is displayed as an identifier in the

__PRETTY_FUNCTION__ string to know whether it is a valid enum value.

Defined at line 59 of file ../../src/ui/lib/escher/third_party/enum_utils/enum_utils.h
```
template <typename E, auto Begin, auto Offset>
```
```
bool IsValueValidEnum ()
```
Helper function check if |Begin + Offset| is a valid enum value in |E|.

Defined at line 77 of file ../../src/ui/lib/escher/third_party/enum_utils/enum_utils.h
```
template <typename E, auto Begin, auto... Ints>
```
```
size_t CountEnumElementInSequence (std::integer_sequence<decltype(Begin), Ints...> seq)
```
Helper function counting all the valid enum values in integer sequence

{Begin, Begin + 1, ..., Begin + Ints.size() - 1}.

Defined at line 84 of file ../../src/ui/lib/escher/third_party/enum_utils/enum_utils.h
```
template <typename E, auto Min, auto... Ints>
```
```
std::optional<decltype(Min)> MaxEnumElementInSequence (std::integer_sequence<decltype(Min), Ints...> seq)
```
Helper function finding the maximum enum values in integer sequence

{Begin, Begin + 1, ..., Begin + Ints.size() - 1}.

Returns std::nullopt if none of the values is valid in the sequence.

Defined at line 93 of file ../../src/ui/lib/escher/third_party/enum_utils/enum_utils.h
```
template <typename Eauto Minauto... Ints>
```
```
std::optional<decltype(Min)> MinEnumElementInSequence (std::integer_sequence<decltype(Min), Ints...> seq)
```
Helper function finding the minimum enum values in integer sequence

{Begin, Begin + 1, ..., Begin + Ints.size() - 1}.

Returns std::nullopt if none of the values is valid in the sequence.

Defined at line 109 of file ../../src/ui/lib/escher/third_party/enum_utils/enum_utils.h