From: "tompng (tomoya ishida)" <noreply@...>
Date: 2022-08-31T16:05:52+00:00
Subject: [ruby-core:109798] [Ruby master Bug#18988] # Ripper cannot parse some code that has regexp named capture

Issue #18988 has been reported by tompng (tomoya ishida).

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Bug #18988: # Ripper cannot parse some code that has regexp named capture
https://bugs.ruby-lang.org/issues/18988

* Author: tompng (tomoya ishida)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.2.0dev (2022-08-29T15:47:09Z :detached: cd7506593a) [x86_64-linux]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
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Ripper does not seems to recognize regexp named capture defining new local variables, fails to parse some code.
~~~ruby
requie 'ripper'

# expect syntax ok, got syntax error
Ripper.sexp("/(?<a>)/ =~ ''; x = a **a, a if false")

# expect syntax error, got syntax ok
Ripper.sexp("/(?<a>)/ =~ ''; x = a **a, **a if false")

# "exit" is a method call, got string_literal
Ripper.sexp("/(?<a>)/ =~ ''; a %(exit)")
~~~




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