Fortran 2008 Features

The following Fortran 2008 features are new in this release:

• An EXIT statement can appear in a BLOCK, IF, ASSOCIATE, SELECT CASE, or SELECT TYPE construct.

• You can specify intrinsic types in a TYPE statement

• You can specify implied-shape array specifications for named constant arrays

• You can specify %re and %im designators for the real and imaginary parts of values of COMPLEX type

• Pointer Initialization

• Binary, octal, and hexadecimal constants are allowed for one or more arguments in intrinsic routines BGE, BGT, BLE, BLT, CMPLX, DBLE, DSHIFTL, DSHIFTR, IAND, IEOR, INT, IOR, MERGE_BITS, and REAL.

• You can specify an optional integer datatype for the subscript-name in the triplet-spec in the FORALL statement.

• An ALLOCATE statement can give a polymorphic variable the shape and type of another variable without copying the value. This is done with MOLD= replacing SOURCE=.

• Except for procedure arguments and pointer dummy arguments, a PURE function may have a dummy argument with the VALUE attribute without the explicit INTENT(IN) attribute.

• Dummy arguments of ELEMENTAL procedures may appear in specification expressions in the procedure.

• You can specify an optional RADIX argument for the intrinsic function SELECTED_REAL_KIND and the intrinsic module procedure IEEE_SELECTED_REAL_KIND.

The following Fortran 2008 features are also supported:

• Submodules

• IMPURE keyword

• The EXECUTE_COMMAND_LINE subroutine

• The BLOCK construct

• The FUNCTION and SUBROUTINE keywords on the END statement are optional for internal procedures and module procedures.

• A negative value that is not zero but rounds to zero on output is displayed with a leading minus sign

• Generic resolution of procedures where one dummy argument has the ALLOCATABLE attribute and the other has the POINTER attribute without INTENT (IN), or where one is a procedure and the other is a data object.

• The ENTRY statement is an obsolescent feature.

• A source statement can begin with one or more semicolon characters.

• Coarray intrinsic routines: ATOMIC_DEFINE and ATOMIC_REF

• A polymorphic MOLD= specifier for ALLOCATE

• Coarrays (Windows* and Linux* only)

• Image control statements: SYNC ALL, SYNC IMAGES, SYNC MEMORY, CRITICAL, LOCK, and UNLOCK

• Coarray intrinsic routines: IMAGE_INDEX, LCOBOUND, NUM_IMAGES, THIS_IMAGE, and UCOBOUND

• CRITICAL construct

• Maximum array rank of 15 (Intel® Fortran allows 31 dimensions)

• G0 and G0.d format edit descriptors

• FINAL routines

• GENERIC, OPERATOR, and ASSIGNMENT overloading in type-bound procedures

• A generic interface may have the same name as a derived type

• Bounds specification and bounds remapping list on a pointer assignment

• In formatting, a * indicates an unlimited repeat count

• NEWUNIT= specifier in OPEN

• A CONTAINS section can be empty

• Attributes CODIMENSION and CONTIGUOUS

• Coarrays can be specified in ALLOCATABLE, ALLOCATE, and TARGET statements

• MOLD keyword in ALLOCATE

• DO CONCURRENT statement

• ERROR STOP statement

• Intrinsic functions BESSEL_J0, BESSEL_J1, BESSEL_JN, BESSEL_Y0, BESSEL_Y1, BESSEL_YN, BGE, BGT, BLE, BLT, DSHIFTL, DSHIFTR, ERF, ERFC, ERFC_SCALED, GAMMA, HYPOT, IALL, IANY, IPARITY, IS_CONTIGUOUS, LEADZ, LOG_GAMMA, MASKL, MASKR, MERGE_BITS, NORM2, PARITY, POPCNT, POPPAR, SHIFTA, SHIFTL, SHIFTR, STORAGE_SIZE, TRAILZ

• ISO_FORTRAN_ENV module constants ATOMIC_INT_KIND, ATOMIC_LOGICAL_KIND, CHARACTER_KINDS, INTEGER_KINDS, INT8, INT16,INT32, INT64, LOGICAL_KINDS, REAL_KINDS, REAL32, REAL64, REAL128, STAT_LOCKED, STAT_LOCKED_OTHER_IMAGE, STAT_UNLOCKED

• ISO_FORTRAN_ENV type LOCK_TYPE

• SCALAR keyword for ALLOCATED

For information about the Fortran standards, visit the Fortran standards technical committee website at http://j3-fortran.org/.