TYPE_ALNUM, TYPE_ALPHA, TYPE_ENUM, TYPE_INTEGER, TYPE_IPV4, TYPE_NUMERIC, TYPE_REGEXP - form system

       These are building blocks  for  the  form  library,  defining  fields  that  can  be  created  using  the
       fieldtype(3FORM)  functions.   Each  provides functions for field- and character-validation, according to
       the given datatype.

   TYPE_ALNUM
       This holds alphanumeric data.

   TYPE_ALPHA
       This holds alphabetic data.

   TYPE_ENUM
       This holds an enumerated type.

   TYPE_INTEGER
       This holds a decimal integer.

   TYPE_IPV4
       This holds an IPv4 internet address, e.g., "127.0.0.1".

   TYPE_NUMERIC
       This holds a decimal number, with optional sign and decimal point.

   TYPE_REGEXP
       This holds a regular expression.

TYPE_ALNUM,  TYPE_ALPHA,  TYPE_ENUM,  TYPE_INTEGER,  TYPE_IPV4,  TYPE_NUMERIC,  TYPE_REGEXP - form system
       global variables

       The TYPE_IPV4 variable is an extension not provided by older implementations of the form library.

form(3FORM)

ncurses 6.5                                        2024-03-16                              form_variables(3FORM)

#include<form.h>FIELDTYPE*TYPE_ALNUM;FIELDTYPE*TYPE_ALPHA;FIELDTYPE*TYPE_ENUM;FIELDTYPE*TYPE_INTEGER;FIELDTYPE*TYPE_IPV4;FIELDTYPE*TYPE_NUMERIC;FIELDTYPE*TYPE_REGEXP;