Bug #19882: :$0x should be rejected

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN

[mame (Yusuke Endoh)]

irb(main):001> :$0x
=> :"$0x"

Since $0x is not a valid global variable name, I think it should be rejected unless quotation marks are used.

[kddnewton (Kevin Newton)]

I think it is rejected at the moment:

-e:1: identifier $0x is not valid to get
-e: compile error (SyntaxError)

[mame (Yusuke Endoh)]

Don't overlook the colon!

[nobu (Nobuyoshi Nakada)]

• Related to Bug #19549: Inconsistency in backref parsing added

[nobu (Nobuyoshi Nakada)]

It's subtly intentional.

The former seemed better to me.

$ ruby -e '$01234'
-e:1: identifier $01234 is not valid to get
-e: compile error (SyntaxError)

$ ./ruby -e 'p :$01234'
-e:1: syntax error, unexpected integer literal, expecting end-of-input
$01234
  ^~~~
-e: compile error (SyntaxError)

"Then the symbol should not be quoted"?, maybe.

[nobu (Nobuyoshi Nakada)]

https://github.com/ruby/ruby/pull/8450

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|89802078f9f406be411032814e1960e62dbc7ce2.

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[Bug #19882] Reject tokens invalid as symbols