[thirdparty/gcc.git] / gcc / fortran / doc / gfortran / compiler-characteristics / files-opened-without-an-explicit-action=-specifier.rst

..
  Copyright 1988-2022 Free Software Foundation, Inc.
  This is part of the GCC manual.
  For copying conditions, see the copyright.rst file.

.. index:: open, action

.. _files-opened-without-an-explicit-action=-specifier:

Files opened without an explicit ACTION= specifier
**************************************************

The Fortran standard says that if an ``OPEN`` statement is executed
without an explicit ``ACTION=`` specifier, the default value is
processor dependent.  GNU Fortran behaves as follows:

* Attempt to open the file with ``ACTION='READWRITE'``

* If that fails, try to open with ``ACTION='READ'``

* If that fails, try to open with ``ACTION='WRITE'``

* If that fails, generate an error
Commit	Line	Data
c63539ff ML	1	..
	2	Copyright 1988-2022 Free Software Foundation, Inc.
	3	This is part of the GCC manual.
	4	For copying conditions, see the copyright.rst file.
	5
	6	.. index:: open, action
	7
	8	.. _files-opened-without-an-explicit-action=-specifier:
	9
	10	Files opened without an explicit ACTION= specifier
	11	**************************************************
	12
	13	The Fortran standard says that if an ``OPEN`` statement is executed
	14	without an explicit ``ACTION=`` specifier, the default value is
	15	processor dependent. GNU Fortran behaves as follows:
	16
	17	* Attempt to open the file with ``ACTION='READWRITE'``
	18
	19	* If that fails, try to open with ``ACTION='READ'``
	20
	21	* If that fails, try to open with ``ACTION='WRITE'``
	22
3ed1b4ce	23	* If that fails, generate an error