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digitalmars.D - non-standard json output

reply "Anthony Goins" <neontotem gmail.com> writes:
Is this a bug?

"file" : "/home/anthony/projects/dcomposer/src/printui.d",

A line from DMD 2.063 json output.

"file" : "\/usr\/include\/d\/gsv\/SourceBuffer.d",

A line from an older DMD version. Forward slashes escaped 
according to json standard.

Hesitant to file a bug report because by the time I see something 
it's probably already well known and fixed.
Jun 04 2013
next sibling parent reply "Brian Schott" <briancschott gmail.com> writes:
On Tuesday, 4 June 2013 at 20:59:55 UTC, Anthony Goins wrote:

 Is this a bug?

 "file" : "/home/anthony/projects/dcomposer/src/printui.d",

 A line from DMD 2.063 json output.

 "file" : "\/usr\/include\/d\/gsv\/SourceBuffer.d",

 A line from an older DMD version. Forward slashes escaped 
 according to json standard.

 Hesitant to file a bug report because by the time I see 
 something it's probably already well known and fixed.


Where does the standard say that forward slashes have to be 
escaped? It shows in the syntax diagram that you CAN escape it, 
but there is no requirement to do so as it is a unicode character 
other than '"' or '\'
Jun 04 2013
next sibling parent reply "Anthony Goins" <neontotem gmail.com> writes:
On Tuesday, 4 June 2013 at 21:35:27 UTC, Brian Schott wrote:

 On Tuesday, 4 June 2013 at 20:59:55 UTC, Anthony Goins wrote:

 Is this a bug?

 "file" : "/home/anthony/projects/dcomposer/src/printui.d",

 A line from DMD 2.063 json output.

 "file" : "\/usr\/include\/d\/gsv\/SourceBuffer.d",

 A line from an older DMD version. Forward slashes escaped 
 according to json standard.

 Hesitant to file a bug report because by the time I see 
 something it's probably already well known and fixed.


 Where does the standard say that forward slashes have to be 
 escaped? It shows in the syntax diagram that you CAN escape it, 
 but there is no requirement to do so as it is a unicode 
 character other than '"' or '\'


     any-Unicode-character-
         except-"-or-\-or-
         control-character
     \"
     \\
     \/
     \b
     \f
     \n
     \r
     \t
     \u four-hex-digits

from "http://www.json.org/"
Jun 04 2013
parent reply "Brian Schott" <briancschott gmail.com> writes:
The "char" rule in the json standard can be matched by anything 
that isn't a control character, a double quote, or a backslash. 
I'm pretty sure you're not arguing that the forward slash is a 
double quote or that the forward slash is a backslash, so the 
only option left is that '/' is a control character, and thus 
needs escaping. I'm pretty sure that it's not, because 002f is 
not in the range defined as a control character[1]

[1] http://www.unicode.org/glossary/#control_codes
Jun 04 2013
parent "Anthony Goins" <neontotem gmail.com> writes:
On Tuesday, 4 June 2013 at 21:55:38 UTC, Brian Schott wrote:

 The "char" rule in the json standard can be matched by anything 
 that isn't a control character, a double quote, or a backslash. 
 I'm pretty sure you're not arguing that the forward slash is a 
 double quote or that the forward slash is a backslash, so the 
 only option left is that '/' is a control character, and thus 
 needs escaping. I'm pretty sure that it's not, because 002f is 
 not in the range defined as a control character[1]

 [1] http://www.unicode.org/glossary/#control_codes


I appreciate your taking time to enlighten me.
I almost get it.
b is b
\b is backspace
f is f
\f is formfeed
/ is /
but what the heck is \/

This is a rhetorical post.
Go back to being productive ;)
Jun 04 2013
prev sibling parent "Anthony Goins" <neontotem gmail.com> writes:
On Tuesday, 4 June 2013 at 21:35:27 UTC, Brian Schott wrote:

 On Tuesday, 4 June 2013 at 20:59:55 UTC, Anthony Goins wrote:

 Is this a bug?

 "file" : "/home/anthony/projects/dcomposer/src/printui.d",

 A line from DMD 2.063 json output.

 "file" : "\/usr\/include\/d\/gsv\/SourceBuffer.d",

 A line from an older DMD version. Forward slashes escaped 
 according to json standard.

 Hesitant to file a bug report because by the time I see 
 something it's probably already well known and fixed.


 Where does the standard say that forward slashes have to be 
 escaped? It shows in the syntax diagram that you CAN escape it, 
 but there is no requirement to do so as it is a unicode 
 character other than '"' or '\'


Thanks, I get it now.
Jun 04 2013
prev sibling parent Alix Pexton <alix.DOT.pexton gmail.DOT.com> writes:
On 04/06/2013 9:59 PM, Anthony Goins wrote:

 Is this a bug?

 "file" : "/home/anthony/projects/dcomposer/src/printui.d",

 A line from DMD 2.063 json output.

 "file" : "\/usr\/include\/d\/gsv\/SourceBuffer.d",

 A line from an older DMD version. Forward slashes escaped according to
 json standard.

 Hesitant to file a bug report because by the time I see something it's
 probably already well known and fixed.


I looked into this out of curiosity.
The solidus _can be_ escaped to allow JSON strings to contain XML 
closing tags (like </b>) while the JSON itself is wrapped by an XML element.

In contexts where the JSON is not going to be read by an XML parser, or 
will not make a potentially confusing closing tag (such as in part of a 
web address or file path) it becomes totally optional.

However, I also read that some buggy implementations of JSON parsers 
treat // as the beginning of a comment even when inside a string.

I hope that helps!

A...
Jun 05 2013