Bug #10028: nested rest keyword argument

• Status: Rejected
• Assignee: matz (Yukihiro Matsumoto)
• Target version: -
• ruby -v: trunk
• Backport: 2.0.0: REQUIRED, 2.1: REQUIRED

[nobu (Nobuyoshi Nakada)]

ネストしたrest argumentは通りますが

def f((*a)) end

ネストしたrest keyword argumentはsyntax errorになります。

def f((**a)) end #=> syntax error, unexpected **arg

[nobu (Nobuyoshi Nakada)]

• Related to Feature #8895: Destructuring Assignment for Hash added

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Assigned

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)

[matz (Yukihiro Matsumoto)]

• Status changed from Assigned to Rejected

This is intentional. Nested arguments are assignees of multiple assignments in reality. And multiple assignments do not support rest keyword argument (yet). When we introduce something like #8895, it should be supported.

Matz.