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Allow only one argument for keyword_init struct

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```
irb(main):001:0> RUBY_VERSION
=> "2.6.5"
irb(main):002:0> S = Struct.new(:foo, keyword_init: true)
=> S(keyword_init: true)
irb(main):003:0> S.new({foo: 23424}, 234) # I don't think this is intentional
=> #<struct S foo=23424>
irb(main):004:0>
```

Tightening this up should inform users when they are confused about
whether a struct is `keyword_init`.
This commit is contained in:
Alan Wu 2019-10-29 20:08:01 -04:00 • committed by Takashi Kokubun
parent 6c3ed0d71c
commit 4c7f789e94
Notes: git 2019-10-31 00:38:28 +09:00
2 changed files with 2 additions and 1 deletions
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test/ruby/test_struct.rb
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@ -105,6 +105,7 @@ module TestStruct
@Struct.new("KeywordInitFalse", :a, :b, keyword_init: false)
assert_raise(ArgumentError) { @Struct::KeywordInitTrue.new(1, 2) }
assert_raise(ArgumentError) { @Struct::KeywordInitTrue.new({a: 100}, 2) }
assert_nothing_raised { @Struct::KeywordInitFalse.new(1, 2) }
assert_nothing_raised { @Struct::KeywordInitTrue.new(a: 1, b: 2) }
assert_raise(ArgumentError) { @Struct::KeywordInitTrue.new(1, b: 2) }