/// Does not depend on the locale.
docstring const uppercase(docstring const & s);
+/// Returns the superscript of \p c or \p c if no superscript exists.
+/// Does not depend on the locale.
+char_type superscript(char_type c);
+
+/// Returns the subscript of \p c or \p c if no subscript exists.
+/// Does not depend on the locale.
+char_type subscript(char_type c);
+
/// Does str start with c?
bool prefixIs(docstring const & str, char_type c);