Sheltran - Statement labels

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Дата изменения: Unknown
Дата индексирования: Fri Jan 16 23:52:48 2009
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Поисковые слова: arp 220

In SHELTRAN the statement label is forbidden for all executable statements. The only context in which the statement label is permitted is in combination with a FORMAT statement. In this case the label must be less than 10000.

As a direct consequence the following normal FORTRAN statements become unuseable in SHELTRAN:

ASSIGN
all forms of GOTO
all forms of IF
DO
the RETURN <variable> form of the RETURN statement
the use of statement numbers in END= or ERR= clauses in I/O statements
the use of statement numbers as arguments of CALL statements

To replace FORTRAN control structures several new SHELTRAN structures have been introduced.