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| From | "robin" <robin51@dodo.com.au> |
| Newsgroups | comp.compilers |
| Subject | Re: Programming language and IDE design |
| Date | Mon, 25 Nov 2013 10:33:43 +1100 |
| Organization | Compilers Central |
| Lines | 21 |
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| Keywords | Fortran, parse |
| Posted-Date | 27 Nov 2013 11:15:11 EST |
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From: "George Neuner" <gneuner2@comcast.net>
Sent: Tuesday, November 19, 2013 11:02 AM
> AFAIK, Fortran's DO loop requires the most lookahead of any of the
> classic language features: LL(4) [if I'm counting correctly].
>
> 10DOI=42
> 10DOI=42,45
The statements are
DO 10 I = 42
DO 10 I = 42, 45
> Card Fortran didn't require whitespace separation.
Still doesn't, though since the advent of Fortran 90,
an alternative free source form requires a space between the syntactic elements,
so the difficulty doesn't arise. Nor, can the "classic" (apocryphal?) error
DO10I=42.45
occur (assuming that declarations are made compulsory with the statement
IMPLICIT NONE).
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Re: Programming language and IDE design Martin Ward <martin@gkc.org.uk> - 2013-11-16 15:55 +0000
Re: Programming language and IDE design Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2013-11-16 19:48 +0100
Re: Programming language and IDE design George Neuner <gneuner2@comcast.net> - 2013-11-18 19:02 -0500
Re: Programming language and IDE design "Steven G. Kargl" <sgk@REMOVEtroutmask.apl.washington.edu> - 2013-11-19 15:36 +0000
Re: Programming language and IDE design George Neuner <gneuner2@comcast.net> - 2013-11-19 12:41 -0500
Re: Parsing Fortran, was Programming language and IDE design glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-11-19 20:18 +0000
Re: Parsing Fortran, was Programming language and IDE design glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-11-21 21:22 +0000
Re: Programming language and IDE design wclodius@earthlink.net (William Clodius) - 2013-11-22 18:27 -0700
Re: Programming language and IDE design "robin" <robin51@dodo.com.au> - 2013-11-25 10:33 +1100
Re: Programming language and IDE design Martin Ward <martin@gkc.org.uk> - 2013-12-03 15:15 +0000
Re: Programming language and IDE design Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2013-12-05 03:35 +0100
Re: Programming language and IDE design hu47121@usenet.kitty.sub.org (Hannah) - 2014-03-02 00:03 +0000
Re: LL vs LR, was Programming language and IDE design Ivan Godard <ivan@ootbcomp.com> - 2014-03-01 20:31 -0800
Re: LL vs LR, was Programming language and IDE design Kaz Kylheku <kaz@kylheku.com> - 2014-03-02 18:41 +0000
Re: Programming language and IDE design George Neuner <gneuner2@comcast.net> - 2014-03-02 12:21 -0500
Re: Programming language and IDE design Jonathan Thornburg <jonathan@cobalt.astro.indiana.edu> - 2013-11-19 19:39 +0000
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