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This document uses the same notation as the Fortran 90 standard. In
particular, the same conventions are used for syntax rules. BNF
descriptions of language features are given in the style used in the
Fortran 90 standard. To distinguish HPF syntax rules from Fortran 90
rules, each HPF rule has an identifying number of the form H
,
where 
is a one-digit major section number and 
is a one- or
two-digit sequence number. The syntax rules are also collected in
Annex 
. Nonterminals not defined in this document
are defined in the Fortran 90 standard. Also note that certain
technical terms such as ``storage unit'' are defined by the Fortran 90
standard; Annex identifies the Fortran 90 rules
defining these nonterminals. References in parentheses in the text
refer to the Fortran 90 standard.
- []Rationale. Throughout this document, material explaining the rationale for including features, choosing particular feature definitions, and other decisions is set off in this format. Readers interested in the language definition only may wish to skip these sections, while readers interested in language design may want to read them more carefully. (End of rationale.)
- Advice to users.
Throughout this document, material that is primarily commentary for users
(including most examples of syntax and interpretation)
is set off in this format. Readers interested in
technical material only may wish to skip these sections, while readers
wanting a more basic approach may want to read them more carefully.
(End of advice to users.)
- Advice
to implementors.
Throughout this document, material that is primarily commentary for
implementors is set off in this format. Readers interested in the
language definition only may wish to skip these sections, while readers
interested in compiler implementation may want to read them more carefully.
(End of advice to implementors.)
-