Pep and Nom

character classes in the ℕ𝕠𝕞 language

Character classes are written [:space:] [:alnum:] etc. The pep the c language implementation of the parse machine and language uses plain ctype.h character classes as a way of grouping characters.

Character classes are uses in tests before blocks These classes are important in a Unicode setting because they allow specifying types of characters in a locale-neutral way. The while and whilenot commands can use character classes as their argument.

check if the workspace is only alphanumeric characters

 r; ![:alnum:] { add " not alpha-numeric! \n"; print; } clear;

read the input stream while the peep register is whitespace

 while [:space:];