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| From | jgk@panix.com (Joe keane) |
| Newsgroups | comp.compilers |
| Subject | precedence have both ways |
| Date | Thu, 30 May 2013 23:21:41 -0400 (EDT) |
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| Lines | 36 |
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| Keywords | parse, theory |
| Posted-Date | 30 May 2013 23:21:41 EDT |
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Anton Ertl <anton@mips.complang.tuwien.ac.at> wrote:
>a<3 AND b<3
This reminds me of a question.
One person designs a language 'C1' with precedence:
[higher]
...
|
&
<, <=, >, <=
==, !=
...
[lower]
Some other person designs a language 'C2' with precedence:
[higher]
...
<, <=, >, <=
==, !=
|
&
...
[lower]
They're the same besides that.
To compromise, they make a new language 'C3' such that a program is
valid C3 if it is valid C1 and valid C2 -and- both ways mean the same.
Is there some good way to do this -in the grammar-?
[I see gcc has warnings like this.]
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Articles/books that discuss separating the context-free part of a language from the context-sensitive part? "Costello, Roger L." <costello@mitre.org> - 2013-05-17 20:57 +0000
Re: Articles/books that discuss separating the context-free part of a language from the context-sensitive part? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-05-18 00:18 +0000
Re: Articles/books that discuss separating the context-free part of a language from the context-sensitive part? Gene Wirchenko <genew@telus.net> - 2013-05-19 18:02 -0700
Re: Articles/books that discuss separating the context-free part of a language from the context-sensitive part? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-05-20 03:17 +0000
Re: Articles/books that discuss separating the context-free part of a language from the context-sensitive part? Aleksey Demakov <ademakov@gmail.com> - 2013-05-18 16:52 +0400
Re: Articles/books that discuss separating the context-free part of a language from the context-sensitive part? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-05-20 10:53 +0000
Re: Articles/books that discuss separating the context-free part of a language from the context-sensitive part? Gene Wirchenko <genew@telus.net> - 2013-05-20 23:24 -0700
precedence have both ways jgk@panix.com (Joe keane) - 2013-05-30 23:21 -0400
Re: precedence have both ways glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2013-05-31 05:10 +0000
Re: precedence have both ways anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-05-31 10:54 +0000
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