N1828 (The new features of Fortran 2008).pdf

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1、ISO/IECJTC1/SC22/WG5N1828ThenewfeaturesofFortran2008JohnReid,JKRAssociates,UKMay6,2010AbstractTheaimofthispaperistosummarizethenewfeaturesofthedraftFortran2008standard(ISO/IEC2010).WetakeasourstartingpointFortran2003(ISO/IEC2004).Anofficialextensionforenhancedmo

2、dulefacilitieshasbeenpublishedasaType2TechnicalReport(ISO/IEC2005)andWG5wascommittedtoincludethisinFortran2008.ForaninformaldescriptionofFortran2003andenhancedmodulefacilities,seeMetcalf,Reid,andCohen(2004).Themajorextensionconsistsofcoarraysforparallelcomputi

3、ng.SincetheauthorhasalreadysummarizedcoarraysinanotherWG5paper(Reid2010),wereferthereadertothisfordetails.ThisarticleisnotanofficialdocumentandhasnotbeenapprovedbyPL22.3(formerlyJ3)orWG5.12ISO/IECJTC1/SC22/WG5N1828Contents1Introduction52Submodules53Coarrays74Per

4、formanceenhancements74.1doconcurrent...........................................74.2Contiguousattribute.......................................84.3Simplycontiguousarrays....................................105Datadeclaration105.1Maximumrank.......................

5、...................105.2Longintegers...........................................115.3Allocatablecomponentsofrecursivetype...........................115.4Implied-shapearray.......................................125.5Pointerinitialization.........................

6、..............125.6Datastatementrestrictionslifted................................125.7Kindofaforallindex.......................................125.8Typestatementforintrinsictypes...............................125.9Declaringtype-boundprocedures................

7、................126Datausage136.1Omittinganallocatablecomponentinastructureconstructor................136.2Copyingtheboundsofasourcearrayinanallocatestatement...............136.3Allocatingapolymorphicvariable...............................136.4Accessingrealand

8、imaginaryparts...............................136.5Pointerfunctions.........................................146.6Elementaldummyargumentrestrictionslifted.........................147