Is encoding/json POSIX compatible?

[Xabi Martí]

I'm writing a program that uses enconding/json and when writing the files I see that it doesn't add a newline character at the end of the file, according to https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206 it is supposed that a line is:

3.206 Line
A sequence of zero or more non- <newline> characters plus a terminating <newline> character.

so, I've to add it manually? why is not POSIX compatible? 

example:

cat -e file.json | tail -n 2

  }$
}%

any help? thanks!

[Brian Candler]

The JSON spec does not require any whitespace after the object, newline or otherwise. And POSIX does not require that files end with a newline.

Maybe you are thinking of another spec, like https://jsonlines.org/ - but that's not part of JSON.

[Javier Marti]

So, as per the link that I sent, a json file is not a text file, right? is just a file, I want to have this clear

thanks

--
You received this message because you are subscribed to a topic in the Google Groups "golang-nuts" group.
To unsubscribe from this topic, visit https://groups.google.com/d/topic/golang-nuts/qjxJ3Zunzfc/unsubscribe.
To unsubscribe from this group and all its topics, send an email to golang-nuts...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/692bd65e-74f4-448a-b399-de8c38785aefn%40googlegroups.com.

[Brian Candler]

By the definition of "3.403 Text File" then no, because a JSON file can have arbitrarily long lines.

Note also: "Although POSIX.1-2017 does not distinguish between text files and binary files (see the ISO C standard), many utilities only produce predictable or meaningful output when operating on text files"

Hence there's no guarantee that a line-based text processing utility like grep or sed will behave meaningfully with arbitrary JSON data. Typically they do work with "incomplete" lines (3.195), but not arbitrarily long ones.

[Jason Phillips]

More generally, the input and output of encoding/json need not be a file at all.