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add spec raising syntax error when defining yield in singleton class #873

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Oct 11, 2021
Merged

add spec raising syntax error when defining yield in singleton class #873

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15 changes: 15 additions & 0 deletions language/singleton_class_spec.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,21 @@ class << Object.new
-> { eval(code) }.should complain(/warning: `yield' in class syntax will not be supported from Ruby 3.0/)
end
end

ruby_version_is "3.0" do
it 'raises a SyntaxError' do
code = <<~RUBY
def m
class << Object.new
yield
end
end
m { :ok }
RUBY

-> { eval(code) }.should raise_error(SyntaxError, /Invalid yield/)
end
end
end

describe "Defining instance methods on a singleton class" do
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