Using reserved-identifier

[fliiiix]

Is this project using reserved identifiers all over the place on purpose?
(I wasn't able to find anything on that topic)

warning: identifier '_EndScalarKind' is reserved because it starts with '_' followed by a capital letter [-Wreserved-identifier]
    _EndScalarKind,

And would you be open to merge something renaming them to lower case identifiers?
(Or any other preference for this matter)