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Oracle Solaris Studio 12.3: Fortran User's Guide     Oracle Solaris Studio 12.3 Information Library
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Document Information


1.  Introduction

2.  Using Solaris Studio Fortran

3.  Fortran Compiler Options

4.  Solaris Studio Fortran Features and Extensions

4.1 Source Language Features

4.1.1 Continuation Line Limits

4.1.2 Fixed-Form Source Lines

4.1.3 Tab Form

4.1.4 Source Form Assumed Mixing Forms Case

4.1.5 Limits and Defaults

4.2 Data Types

4.2.1 Boolean Type Rules Governing Boolean Type Alternate Forms of Boolean Constants



Hollerith Alternate Contexts of Boolean Constants

4.2.2 Abbreviated Size Notation for Numeric Data Types

4.2.3 Size and Alignment of Data Types

4.3 Cray Pointers

4.3.1 Syntax

4.3.2 Purpose of Cray Pointers

4.3.3 Declaring Cray Pointers and Fortran 95 Pointers

4.3.4 Features of Cray Pointers

4.3.5 Restrictions on Cray Pointers

4.3.6 Restrictions on Cray Pointees

4.3.7 Usage of Cray Pointers

4.4 STRUCTURE and UNION (VAX Fortran)

4.5 Unsigned Integers

4.5.1 Arithmetic Expressions

4.5.2 Relational Expressions

4.5.3 Control Constructs

4.5.4 Input/Output Constructs

4.5.5 Intrinsic Functions

4.6 Fortran 200x Features

4.6.1 Interoperability with C

4.6.2 IEEE Floating-Point Exception Handling

4.6.3 Command-Line Argument Intrinsics

4.6.4 PROTECTED Attribute

4.6.5 Fortran 2003 Asynchronous I/O

4.6.6 Extended ALLOCATABLE Attribute

4.6.7 VALUE Attribute

4.6.8 Fortran 2003 Stream I/O

4.6.9 Fortran 2003 IMPORT Statement

4.6.10 Fortran 2003 FLUSH I/O Statement

4.6.11 Fortran 2003 POINTER INTENT Feature

4.6.12 Fortran 2003 Enhanced Array Constructor

4.6.13 Object-Oriented Fortran Support

4.6.14 Additional Fortran 2003 and Fortran 2008 Features

4.7 Additional I/O Extensions

4.7.1 I/O Error Handling Routines

4.7.2 Variable Format Expressions

4.7.3 NAMELIST Input Format

4.7.4 Binary Unformatted I/O

4.7.5 Miscellaneous I/O Extensions

4.8 Directives

4.8.1 Form of Special f95 Directive Lines Fixed-Form Source Free-Form Source

4.8.2 FIXED and FREE Directives Scope Uses Restrictions

4.8.3 Parallelization Directives

4.9 Module Files

4.9.1 Searching for Modules

4.9.2 The -use=list Option Flag

4.9.3 The fdumpmod Command

4.10 Intrinsics

4.11 Forward Compatibility

4.12 Mixing Languages

5.  FORTRAN 77 Compatibility: Migrating to Solaris Studio Fortran

A.  Runtime Error Messages

B.  Features Release History

C.  Fortran Directives Summary


4.5 Unsigned Integers

The Fortran compiler accepts a new data type, UNSIGNED, as an extension to the language. Four KIND parameter values are accepted with UNSIGNED: 1, 2, 4, and 8, corresponding to 1-, 2-, 4-, and 8-byte unsigned integers, respectively.

The form of an unsigned integer constant is a digit-string followed by the upper or lower case letter U, optionally followed by an underscore and kind parameter. The following examples show the maximum values for unsigned integer constants:


Expressed without a kind parameter (12345U), the default is the same as for default integer. This is U_4 but can be changed by the -xtypemap option, which will change the kind type for default unsigned integers.

Declare an unsigned integer variable or array with the UNSIGNED type specifier:

        UNSIGNED U
        UNSIGNED(KIND=2) :: A
        UNSIGNED*8 :: B

4.5.1 Arithmetic Expressions

4.5.2 Relational Expressions

Signed and unsigned integer operands may be compared using intrinsic relational operations. The result is based on the unaltered value of the operands.

4.5.3 Control Constructs

4.5.4 Input/Output Constructs

4.5.5 Intrinsic Functions