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wren/test/language/is/is.wren
T

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IO.print(Num is Class) // expect: true
IO.print(true is Bool) // expect: true
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IO.print(new Fn { 1 } is Fn) // expect: true
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IO.print(123 is Num) // expect: true
IO.print(null is Null) // expect: true
IO.print("s" is String) // expect: true
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IO.print(Num is Bool) // expect: false
IO.print(null is Class) // expect: false
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IO.print(true is Fn) // expect: false
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IO.print(new Fn { 1 } is Num) // expect: false
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IO.print("s" is Null) // expect: false
IO.print(123 is String) // expect: false
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// Everything extends Object.
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IO.print(Num is Object) // expect: true
IO.print(null is Object) // expect: true
IO.print(true is Object) // expect: true
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IO.print(new Fn { 1 } is Object) // expect: true
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IO.print("s" is Object) // expect: true
IO.print(123 is Object) // expect: true
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// Classes extend Class.
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IO.print(Num is Class) // expect: true
IO.print(null is Class) // expect: false
IO.print(true is Class) // expect: false
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IO.print(new Fn { 1 } is Class) // expect: false
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IO.print("s" is Class) // expect: false
IO.print(123 is Class) // expect: false
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// Ignore newline after "is".
IO.print(123 is
Num) // expect: true