2.2.6 Terminology Referring to Data Items

Individual Fortran statements and expressions can have restrictions in using and formatting data items: constants, variables, arrays, array elements, scalar record fields, aggregate fields, character substrings, and expressions.

Throughout this manual, the following four categories identify which data items can be included in a particular statement or expression:

Examples

Consider the following declarations:


INTEGER INT, INTARY (10)

 . . .

STRUCTURE /STRA/

    INTEGER  INTFLD, INTFLDARY (10)

END STRUCTURE



STRUCTURE /STRB/

    CHARACTER*20  CHARFLD

    INTEGER  INTFLD, INTFLDARY (10)

    STRUCTURE STRUCFLD

        COMPLEX  CPXFLD, CPXFLDARY (10)

    END STRUCTURE

    RECORD  /STRA/  RECFLD, RECFLDARY (10)

END STRUCTURE

 . . .

RECORD  /STRB/  REC, RECRUIT (10)

Each of the following references is derived from the preceding data declarations:

Scalar References


INT

INTARY(1)

REC.INTFLD

REC.INTFLDARY(1)

REC.RECFLD.INTFLD

REC.STRUCFLD.CPXFLD

REC.RECFLD.INTFLDARY(1)

REC.RECFLDARY(1).INTFLD

REC.RECFLDARY(1).INTFLDARY(1)

REC.CHARFLD

REC.CHARFLD(5:10)

RECRUIT(1).CHARFLD(5:10)

RECRUIT(1).INTFLD

RECRUIT(1).INTFLDARY(1)

RECRUIT(1).RECFLD.INTFLD

RECRUIT(1).STRUCFLD.CPXFLD



RECRUIT(1).RECFLD.INTFLDARY(1)

RECRUIT(1).RECFLDARY(1).INTFLD

RECRUIT(1).RECFLDARY(1).INTFLDARY(1)

Scalar Memory References

All references listed in the preceding scalar references category are also in the category of scalar memory references, because they do not include constants and expressions.

Array Name References


INTARY

RECRUIT

REC.INTFLDARY

REC.RECFLDARY

REC.RECFLD.INTFLDARY

REC.RECFLDARY(1).INTFLDARY

REC.STRUCFLD.CPXFLDARY

RECRUIT(1).INTFLDARY

RECRUIT(1).RECFLDARY



RECRUIT(1).RECFLD.INTFLDARY

RECRUIT(1).STRUCFLD.CPXFLDARY

RECRUIT(1).RECFLDARY(1).INTFLDARY

Aggregate References


REC

RECRUIT(1)



REC.RECFLD

REC.STRUCFLD

REC.RECFLDARY(1)

RECRUIT(1).RECFLD

RECRUIT(1).STRUCFLD

RECRUIT(1).RECFLDARY(1)


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