Hi, does someone know all permitted characters in

backticks

? Until now we have the following:

val ` -!"#$%^&()*+,-=?@^_{|}~😡` = ""

Characters known to be not allowed:

.:/\[]<>

Is there a place that we can find this? Related topics: https://gist.github.com/Danilo-Araujo-Silva/36814f87cdf71177571e817aee040096 https://kotlinlang.org/docs/reference/java-interop.html#escaping-for-java-identifiers-that-are-keywords-in-kotlin https://kotlinlang.org/docs/reference/coding-conventions.html#naming-rules https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.2.2 https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-4.html#jvms-4.2

It's less if you also want to support Android: https://source.android.com/devices/tech/dalvik/dex-format#simplename

Hum, interesting. I would like to use this in some enum of mine in my kotlin dsl code in buildSrc

I guess it's fine then since that's never run on Android 🙂

@Test
    fun `angry path test 😡`() {
        TODO("not implemented") 
    }

wow we can even put some emojis.. not sure how useful that will be 😄

Huahuh, crazy, I think I’ll start using this ^^

btw

\

&

/

is not allowed either.

and

.

I guess

Yes, the aren’t allowed and I would like to use

.

and

>

. I was trying some against the ascii table and some of them are not allowed. It looks like if java uses it somehow the aren’t allowed, but I don’t know.

I think it's all characters which have specific meaning in JVM-internal names

I think maybe this is right, but I got the same conclusion of you, where we use

\

in jvm? It’s kind of strange

And

[

may also be forbidden

This does not explain everything but explains a part = )

It doesn't explain

\

and

>

\

is the escape character,

>

is math op and right part of arrow.

But not in a JVM internal symbol name

Here are the rules, I'm not sure if reason for everything is explained there, but some for some things it is: https://docs.oracle.com/javase/specs/jvms/se11/html/jvms-4.html#jvms-4.2

Yeah that's that I've posted. I read over

>

being disallowed. It doesn't explain

\

though, which is only disallowed in module & package names.

Heh, missed it somehow 😉 Sorry

It's almost the same link 😛 😛

Huhu, it looks like the se11 give us more clues

Yup, almost, with only just 8 years of development difference between them 🙂

oh it's 11, read over that too 😄

So, can we say, everything that is different from not allowed by the naming rules are allowed? ^^

¯\_(ツ)_/¯

I'd say yes, unless Kotlin compiler complains for its own Kotliny reasons 🙂 I would also be careful with using this in production code, it tends to bite the user in the (‿ˠ‿) at most unexpected moments.

Hehe, it’s true. But since I can take a lot of benefit from a name convention of mine I think I’ll put it agains some tests, but I’ll be using some not too weird ones. Either way, I’ve created this gist: https://gist.github.com/Danilo-Araujo-Silva/36814f87cdf71177571e817aee040096 For future references.