form_variables(3) | Library calls | form_variables(3)

# NAME

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

# SYNOPSIS

    #include <form.h>

    FIELDTYPE * TYPE_ALNUM;
    FIELDTYPE * TYPE_ALPHA;
    FIELDTYPE * TYPE_ENUM;
    FIELDTYPE * TYPE_INTEGER;
    FIELDTYPE * TYPE_IPV4;
    FIELDTYPE * TYPE_NUMERIC;
    FIELDTYPE * TYPE_REGEXP;

# DESCRIPTION

These are building blocks for the form library, defining fields that can be created using the form_fieldtype(3) 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.

# PORTABILITY

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

# SEE ALSO

form(3).

2021-12-25 | ncurses 6.4