From: "jeremyevans0 (Jeremy Evans) via ruby-core" <ruby-core@...>
Date: 2023-08-31T03:51:58+00:00
Subject: [ruby-core:114604] [Ruby master Bug#19281] SyntaxError if first argument of command call has semicolon inside parenthesis

Issue #19281 has been updated by jeremyevans0 (Jeremy Evans).


YARP parses all of these successfully:


```ruby
YARP.parse("p (1;2),(3),(4)").success?
# => true
YARP.parse("p (;),(),()").success?
# => true
YARP.parse("a.b (1;2),(3),(4)").success?
# => true
YARP.parse("a.b (;),(),()").success?
# => true
```

----------------------------------------
Bug #19281: SyntaxError if first argument of command call has semicolon inside parenthesis
https://bugs.ruby-lang.org/issues/19281#change-104425

* Author: tompng (tomoya ishida)
* Status: Open
* Priority: Normal
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
----------------------------------------
These are syntax error
~~~ruby
p (1;2),(3),(4)
p (;),(),()
a.b (1;2),(3),(4)
a.b (;),(),()
~~~
I expect it to be syntax ok because the code below is syntax ok.
~~~ruby
p (1),(2;3),(4;5)
p (),(;),(;)
a.b (1),(2;3),(4;5)
a.b (),(;),(;)
~~~

It will be easy to traverse sexp if the sexp of first argument is same as others
~~~ruby
Ripper.sexp "p (),(),()"
# =>
[:program,
 [[:command,
   [:@ident, "p", [1, 0]],
   [:args_add_block,
    [[:paren, false], # [:paren, [[:void_stmt]]]
     [:paren, [[:void_stmt]]],
     [:paren, [[:void_stmt]]]],
    false]]]]
Ripper.sexp "p (1),(2),(3)"
# =>
[:program,
 [[:command,
   [:@ident, "p", [1, 0]],
   [:args_add_block,
    [[:paren, [:@int, "1", [1, 3]]], # [:paren, [[:@int, "1", [1, 3]]]]
     [:paren, [[:@int, "2", [1, 7]]]],
     [:paren, [[:@int, "3", [1, 11]]]]],
    false]]]]
~~~




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