[ruby-core:83158] [Ruby trunk Feature#13979] Ruby doesn't give error on keyword arguments that you can't refer to

Issue #13979 has been updated by asterite (Ary Borenszweig).


Thank you nobu, I didn't know about Binding#local_variable_get

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Feature #13979: Ruby doesn't give error on keyword arguments that you can't refer to
https://bugs.ruby-lang.org/issues/13979#change-67093

* Author: asterite (Ary Borenszweig)
* Status: Rejected
* Priority: Normal
* Assignee: 
* Target version: 
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You can't use keywords as names for normal arguments. For example all of these give a syntax error:

~~~ruby
def foo(class); end
def foo(def); end
def foo(if); end
# ... other keywords too
~~~

The reason is that there's no way to refer to these names because they are keywords.

However, we can use these names for keyword arguments. All of these work:

~~~ruby
def foo(class: 1); end
def foo(def: 1); end
def foo(if: 1); end
~~~

But I think they should give a syntax error, because for example I can't refer to the argument "class" in the first line (same reason why the first snippet gives a syntax error).



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