[ruby-core:78458] [Ruby trunk Feature#10118] Double splat for non-symbol keys

Issue #10118 has been updated by Aleksandar Kostadinov.


It would be beneficial if one could do:

    my_method(**hash_with_string_keys)


This for example you can read a hash from MongoDB and pass it as parameters to your method without additional processing. For example to implement persistent queue of some operations.

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Feature #10118: Double splat for non-symbol keys
https://bugs.ruby-lang.org/issues/10118#change-61831

* Author: Tsuyoshi Sawada
* Status: Feedback
* Priority: Normal
* Assignee: Yukihiro Matsumoto
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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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