Comments on: Parsing JSON with Scala http://www.hvergi.net/2008/06/parsing-json-with-scala/ Just another programming weblog Tue, 18 Nov 2008 15:06:51 +0000 http://wordpress.org/?v=2.5.1 By: forestman http://www.hvergi.net/2008/06/parsing-json-with-scala/#comment-597 forestman Wed, 29 Oct 2008 00:27:07 +0000 http://www.hvergi.net/?p=22#comment-597 <p><strong>yo...</strong></p> <p>usefull...</p> yo…

usefull…

]]> By: Arnar http://www.hvergi.net/2008/06/parsing-json-with-scala/#comment-39 Arnar Tue, 08 Jul 2008 00:32:39 +0000 http://www.hvergi.net/?p=22#comment-39 <p>@The Superunknown: Yes, I fully acknowledge that comments are not part of the JSON grammar. Consider it an extension if you will. In any case, my parser doesn't parse all JSON strings (in particular ones including floating point numbers) - so I don't claim it is a full JSON parser anyways.</p> <p>We might agree to disagree, but I believe that unless you specifically require it, a parser for language X might very well accept <em>more</em> strings than those of X, hence "language extensions", which are very common in parser/compilers for languages defined by a standard.</p> @The Superunknown: Yes, I fully acknowledge that comments are not part of the JSON grammar. Consider it an extension if you will. In any case, my parser doesn’t parse all JSON strings (in particular ones including floating point numbers) - so I don’t claim it is a full JSON parser anyways.

We might agree to disagree, but I believe that unless you specifically require it, a parser for language X might very well accept more strings than those of X, hence “language extensions”, which are very common in parser/compilers for languages defined by a standard.

]]> By: The Superunknown http://www.hvergi.net/2008/06/parsing-json-with-scala/#comment-37 The Superunknown Fri, 27 Jun 2008 14:10:33 +0000 http://www.hvergi.net/?p=22#comment-37 <p>@Arnar Take a good look at the grammar here(http://www.json.org/); it has no mention of comments whatsoever. Even the official parser by Crockford doesn't deal with comments unless you are talking about something other than JSON... ;-)</p> @Arnar Take a good look at the grammar here(http://www.json.org/); it has no mention of comments whatsoever. Even the official parser by Crockford doesn’t deal with comments unless you are talking about something other than JSON… ;-)

]]> By: Arnar http://www.hvergi.net/2008/06/parsing-json-with-scala/#comment-36 Arnar Fri, 27 Jun 2008 10:28:11 +0000 http://www.hvergi.net/?p=22#comment-36 <p>Mr. Name,</p> <blockquote> <p>If your parser allows /* or //, then it’s not a working JSON parser.</p> </blockquote> <p>By the same argument, GCC is not a working C parser then, since the // comment syntax is not supported by the C standard, but GCC handles them anyways. :)</p> <p>A "working parser" imo is a parser that correctly recognizes and parses all strings of a language, even it can parse some strings outside of the language as well as long as it makes sense.</p> <p>In any case, Javascript's <code>eval()</code>function, the original motivation for JSON, supports comments.</p> Mr. Name,

If your parser allows /* or //, then it’s not a working JSON parser.

By the same argument, GCC is not a working C parser then, since the // comment syntax is not supported by the C standard, but GCC handles them anyways. :)

A “working parser” imo is a parser that correctly recognizes and parses all strings of a language, even it can parse some strings outside of the language as well as long as it makes sense.

In any case, Javascript’s eval()function, the original motivation for JSON, supports comments.

]]> By: Guðmundur Bjarni http://www.hvergi.net/2008/06/parsing-json-with-scala/#comment-34 Guðmundur Bjarni Thu, 26 Jun 2008 22:44:26 +0000 http://www.hvergi.net/?p=22#comment-34 <p>Great! The readers just got a lucky break then! :) I just looked at the parser Arnar wrote and saw that he supported comments. He's a smart guy so I just took his word on it.</p> <p>Thanks for pointing out that the Scala parser is smarter than the Haskell parser :)</p> Great! The readers just got a lucky break then! :) I just looked at the parser Arnar wrote and saw that he supported comments. He’s a smart guy so I just took his word on it.

Thanks for pointing out that the Scala parser is smarter than the Haskell parser :)

]]> By: Name http://www.hvergi.net/2008/06/parsing-json-with-scala/#comment-33 Name Thu, 26 Jun 2008 22:40:51 +0000 http://www.hvergi.net/?p=22#comment-33 <blockquote> <p>I noticed also that this JSON parser does not handle comments, which I leave as an exercise to my good readers.</p> </blockquote> <p>JSON itself doesn't support comments. If your parser allows /* or //, then it's not a working JSON parser.</p>

I noticed also that this JSON parser does not handle comments, which I leave as an exercise to my good readers.

JSON itself doesn’t support comments. If your parser allows /* or //, then it’s not a working JSON parser.

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