Feature #16433: Proposal: Output warning if `_1` is used in parameter name

• Status: Closed
• Assignee: -
• Target version: -

[osyo (manga osyo)]

Currently, output warning if local variable name is _1.

# warning: `_1' is used as numbered parameter
_1 = 42

However, if parameter name is _1, no output warning is issued.

# Actual behavior
# no warning
def hoge(_1);
end

If local variable _1 causes a syntax error in Ruby 3.0(or later ?), I think it is better to output a warning even if you use argument name _1.

# Expected behavior
# warning: `_1' is used as numbered parameter
def hoge(_1);
end

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|27ddb6e99848c397a415b785315896ab50308076.

---

Warn also numbered parameter like parameters

[Feature #16433]

[osyo (manga osyo)]

Thanks!