[ruby-core:94264] [Ruby master Bug#16050] :@ is not parsed correctly

Issue #16050 has been updated by Dan0042 (Daniel DeLorme).


Ah, but `:@1` is not parsed either, even though it's now (unfortunately) valid as a numbered block parameter.

Depending on how #15723 goes, `:@1` and/or `:@` should be parsed if they are valid identifiers.

----------------------------------------
Bug #16050: :@ is not parsed correctly
https://bugs.ruby-lang.org/issues/16050#change-80582

* Author: sawa (Tsuyoshi Sawada)
* Status: Rejected
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN
----------------------------------------
Symbol literal allows `@` as the first character:

```ruby
:@foo # => :@foo
```

Nevertheless, it does not allow `@` by itself:

```ruby
:@ # >> SyntaxError: `@' without identifiers is not allowed as an instance variable name
```

This resembles #10463, but while #10463 is related to placeholder in a method name, the issue here is related to instance variable name, so I think they are different issues.



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