Signature
#define UTF8C_LETTER_UPPERCASE 0x00000001 // Uppercase letter code points, Lu in the Unicode database.#define UTF8C_LETTER_LOWERCASE 0x00000002 // Lowercase letter code points, Ll in the Unicode database.#define UTF8C_LETTER_TITLECASE 0x00000004 // Titlecase letter code points, Lt in the Unicode database.#define UTF8C_LETTER_MODIFIER 0x00000008 // Modifier letter code points, Lm in the Unicode database.#define UTF8C_LETTER_OTHER 0x00000010 // Other letter code points, Lo in the Unicode database.
Description
Category flags to be used with is_string_category(), to check whether code points in a
string are part of that category.