Fortran 2003 Features

The following Fortran 2003 features are new in this release:

• BIND attribute and statement
• Language binding can be specified in a FUNCTION or SUBROUTINE statement, or when defining a derived type
• IS_IOSTAT_END intrinsic function
• IS_IOSTAT_EOR intrinsic function
• INTRINSIC and NONINTRINSIC can be specified for modules in USE statements
• ASYNCHRONOUS attribute and statement
• VALUE attribute and statement
• Asynchronous I/O can be specified in an OPEN or INQUIRE statement
• An ID can be specified for a pending data transfer operation

The following Fortran 2003 features are also supported:

• User-defined operators can be renamed in USE statements
• MOVE_ALLOC intrinsic subroutine
• PROTECTED attribute and statement
• Pointer objects can have the INTENT attribute
• GET_COMMAND intrinsic
• GET_COMMAND_ARGUMENT intrinsic
• COMMAND_ARGUMENT_COUNT intrinsic
• GET_ENVIRONMENT_VARIABLE intrinsic
• Allocatable components of derived types
• Allocatable dummy arguments
• Allocatable function results
• VOLATILE attribute and statement
• Names of length up to 63 characters
• Statements up to 256 lines
• A named PARAMETER constant may be part of a complex constant
• In all I/O statements, the following numeric values can be of any kind: UNIT=, IOSTAT=
• The following OPEN numeric values can be of any kind: RECL=
• The following READ and WRITE numeric values can be of any kind: REC=, SIZE=
• The following INQUIRE numeric values can be of any kind: NEXTREC=, NUMBER=, RECL=, SIZE=
• Recursive I/O is allowed when the new I/O being started is internal I/O that does not modify any internal file other than its own
• IEEE infinities and Nans are displayed by formatted output as specified by Fortran 2003
• In an I/O format, the comma after a P edit descriptor is optional when followed by a repeat specifier
• The following intrinsics take an optional KIND= argument: ACHAR, COUNT, IACHAR, ICHAR, INDEX, LBOUND, LEN, LEN_TRIM, MAXLOC, MINLOC, SCAN, SHAPE, SIZE, UBOUND, VERIFY
• Square brackets [ ] are permitted to delimit array constructors instead of (/ /)
• The Fortran character set has been extended to contain the 8-bit ASCII characters ~ \ [ ] ` ^ { } | # @

For more information, see New Language Features.