From: matz@...
Date: 2014-08-09T04:52:15+00:00
Subject: [ruby-core:64282] [ruby-trunk - Feature #10118] Double splat for	non-symbol keys

Issue #10118 has been updated by Yukihiro Matsumoto.


Double splat was introduced to pass a hash given from keyword arguments.
Keyword argument hash is fundamentally a hash with symbol keys.

Matz.


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Feature #10118: Double splat for non-symbol keys
https://bugs.ruby-lang.org/issues/10118#change-48268

* Author: Tsuyoshi Sawada
* Status: Feedback
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* Category: syntax
* Target version: current: 2.2.0
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The double splat operator ** only seems to work with hashes whose keys are symbols. It will not work when a key is a string, for example. This is true for both ways; for construction:

    def foo **; end
    foo(:a => 3) #=> nil
    foo("a" => 3) #=> ArgumentError: wrong number of arguments (1 for 0)

and destruction:

    def bar *; end
    bar(**{:a => 3}) #=> nil
    bar(**{"a" => 3}) #=> TypeError: wrong argument type String (expected Symbol)

This is confusing. I propose that the double splat syntax should be extended so that it works even when the keys are not symbols.

---Files--------------------------------
0001-vm.c-allow-to-splat-non-symbol-keys.patch (2.06 KB)


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