snakecase

Internal abbreviation marker, marks abbreviations with an underscore behind. Useful if parsing_option 1 is needed, but some abbreviations need parsing_option 2.

Specific case converter shortcuts

Internal helper to test the design rules for any string and setting of to_any_case()

Parsing helpers

Internal function that replaces regex matches with underscores

Internal helper for "lower_upper", "upper_lower". This helper returns a logical vector with TRUE for the first and every second string of those which contain an alphabetic character

Internal helper to replace special characters.

General case conversion

Internal parser, which is relevant for preprocessing, parsing and parsing options