• Fortran2003

Fortran 2003 Features in GNU Fortran

• Fortran Standards

• Fortran 2003 Meta Bug

• The New Features of Fortran 2003 by John Reid (older version)

• Chart of Fortran 2003 Features supported by GNU Fortran

Implemented

See also GFortran news and in the GNU Fortran manuals and note that the following list is incomplete.

• Command-line intrinsics

• Streaming IO

• ENUMERATION support

• Allocatable components and dummy arguments (TR 15581) and move_alloc

• USE statements with INTRINSIC and NON_INTRINSIC (since 2006-11-17)

• ISO_FORTRAN_ENV module (since 2006-11-20)

• VOLATILE attribute (since 2006-11-07)

• VALUE attribute (since 2006-12-03)

• IMPORT statement (since 2006-12-08)

• PROTECTED statement (since 2006-12-10)

• Intent for pointers (since 2007-01-05)

• Renaming operators on the USE statement (since 2007-03-08)

• ISO C Bindings (since 2007-07-02)

• MIN / MAX with character arguments (since 2007-08-06)

• Optional KIND= specifier: ACHAR, COUNT, IACHAR, ICHAR, INDEX, LBOUND, LEN, LEN_TRIM, SCAN, SIZE, UBOUND, VERIFY (since 2007-08-12)

• ABSTRACT INTERFACE (since 2007-08-18) and PROCEDURE statement (since 2007-09-04, without procedure pointers)

• Fortran 2003 BOZ, i.e. BOZ in INT, REAL, DBLE and CMPLX (since 2007-12-08)

• Asynchronous IO, (since 2008-05-2008, standard conform, but implemented as synchronous I/O)

• I/O changes: decimal=, sign=, delim=, pad=, blank=, encoding=default [but not UTF-8] (since 2008-04-05)

• SELECTED_CHAR_KIND (subce 2008-04-30; Fortran 2003 conform, but no optional UCS-4 support)

Fortran 2008

• ASINH, ACOSH, ATANH, ERF, ERFC, GAMMA, LOG_GAMMA, BESSEL_*, HYPOT and ERFC_SCALED

Unimplemented

Features supported by several other compilers

• Procedure pointers (SoC 2008 project, planned for 4.4.0)

• Asynchronous IO implement real asynchronous I/O, currently it is synchronous PR25829

• Extended Formatted I/O specifiers round= (PR35862), i/o specifiers of non-default-kind, (PR29602)

• IEEE Exceptions (TR15580) PR29383

Other features

Note: This list is by far incomplete.

• Support for UCS-4 (ISO 10646) encoding (not required by the Fortran 2003 standard)

• Extended Formatted I/O specifiers encoding=UTF-8 (not required by the Fortran 2003 standard, unless UCS-4 is supported) PR35863

• Optional KIND= specified: MAXLOC, MINLOC, SHAPE (PR29600)

• More allowed initialization expressions PR29962

• Non-initialization expr. as case-selector PR25104

• type-spec for array constructor PR27997 (patch available)

• Type-bound procedures: PROCEDURE, GENERIC

• Abstract derived types: ABSTRACT, DEFERRED

• User Defined Derived Type I/O

• ALLOCATE specifiers SOURCE= and ERRMSG=

• Pointer Rank Remapping PR29785

• ASSOCIATE construction

Moving GNU Fortran towards the 2008 Standard

• submodules: Part of Fortran 2008 (draft) and of the technical report ISO/IEC TR 19767:2005 Fortran - Enhanced Module Facilities

• co-arrays: Part of Fortran 2008 (draft) Co-arrays in the next Fortran Standard PR18918 Implementation draft for gfortran