PUBLIC (statement and attribute)

Enables access to module entities by use association.

Syntax

The syntax of a type declaration statement with the PUBLIC attribute is:

type, attrib-list :: access-id-list

The syntax of the PUBLIC statement is:

PUBLIC [[::] access-id-list]

Description

The PUBLIC attribute may appear only in the specification part of a module. The default accessibility in a module is PUBLIC; it can be reaffirmed using a PUBLIC statement without a list. However, only one PUBLIC accessibility statement without a list is permit ted in a module.

The PUBLIC attribute in a type statement or in an accessibility statement permits access to entities such as module variables, type definitions, functions, and named constants. USE statements may control accessibility further.

A derived type may contain a PUBLIC attribute or an internal PUBLIC statement, if it is defined in a module.

The PUBLIC statement may also be used to permit access to sub routines, generic specifiers, and namelist groups.

The PUBLIC specification for a generic name, operator, or assignment does not apply to any specific name unless the specific name is the same as the generic name.

Examples

MODULE fourier
   PUBLIC      ! PUBLIC unless explicitly PRIVATE
   COMPLEX, PRIVATE :: fft   ! fft accessible only in module
   PRIVATE  a, b, c   ! accessible only in module
   PUBLIC   r, s, t    ! accessible outside the module
END MODULE fourier
 
MODULE place
   PRIVATE   ! Change default accessibility to PRIVATE
   INTERFACE OPERATOR (.st.)
      MODULE PROCEDURE xst
   END INTERFACE
 
   ! Make .st. public; everything else is private
   PUBLIC OPERATOR (.st.)
   LOGICAL, DIMENSION (100) :: lt
   CHARACTER(20) :: name
   INTEGER ix, iy
END MODULE PLACE

Related statements

PRIVATE and USE

Related concepts

For related information, see the following: