bkietz commented on pull request #10691:
URL: https://github.com/apache/arrow/pull/10691#issuecomment-877881536
I recommend avoiding macros whenever possible, but for completeness I'll
note that we could replace
```c++
// color.h
struct Color : EnumType<Color> {
using EnumType::EnumType;
static constexpr const char* kValues = R"(red green blue)";
};
// color.cc
constexpr const char* Color::kValues;
```
with
```c++
ARROW_ENUM(Color, red green blue);
```
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