An update on MarpaX::Demo::SampleGrammars. I've haven't started it yet, but
after huge progress on the original problem over the last couple of days, I
may well do it on Sunday.
I have at least 5 demos ready.
I'll create dirs (in the distro) such as data/nested.strings/,
data/quoted.strings/,
Not at first. Consider:
V 1 or 2: :include file_name = /my/grammars/quoted.strings.bnf
V 1 or 2: :include file_name = /my/grammars/quoted.strings.bnf namespace
= xyz
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Well, perhaps. BTW, I was thinking about namespace more like an adverb for
:default pseudo-rule and/or lexeme default statements. Or, crazy as it is,
wrapping grammars up and exposing them as perl modules.
On Wed, Sep 24, 2014 at 9:19 AM, Ron Savage r...@savage.net.au wrote:
Not at first.
Sounds good. Of course, the namespace declaration could be inside the
include file.
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I've had a play with your (very fancy) code, but I'm now working purely on
an extension of the grammar this thread started with.
And the more I play with Marpa the more astonished I am by its power.
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Not sure I got it right from the beginning, but my attempt, using a
parameterized subset of the C grammar is at
https://gist.github.com/jddurand/8d3238c22731a85eb890 .
JD.
Le lundi 22 septembre 2014 09:12:31 UTC+2, Ron Savage a écrit :
I've developed a grammar (with help from various people
I've developed a grammar (with help from various people of course) for
quoted strings: http://scsys.co.uk:8002/424926
Requirements:
o Strings must be quoted
o Strings are either single or double quoted
o The escape character is \
o If the string is single quoted, internal single quotes must
I've posted some things previously on this topic - but in short, you don't
really need to use events to do this. It's possible to do it in a
semi-straightforward fashion without a lot of jumping through hoops (just a
bunch of rules).
Here's some grammar fragments demonstrating what I'm talking
Thanx for the link.
I did not consider that case, since I'm really interested in the Graphviz
DOT file format, where quotes if any must be double quotes, and internal
quotes must be escaped.
However, I will examine the code you link to, since ever such example is
interesting.
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I think I'll release such samples (I have encountered a few) as
MarpaX::Demo::SampleGrammars. It'll be basically a dummy module with the
good stuff in scripts/*.pl.
I've been thinking about a script collection for many months now.
Any other suggestions (module name, code to include)?
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On Tue, Sep 23, 2014 at 2:14 AM, Ron Savage r...@savage.net.au wrote:
Thanx for the link.
2 of those 3 samples (the 2nd 3rd) produce ambiguous parses. Is that
what you find too?
Yes, the code warns about it; actually I was planning to deal with it as
part of my current work on ASF-based
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