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fn main(){ }
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fn test_result() -> Result<(),()> {
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let a:Option<()> = Some(());
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a?;//~ ERROR the `?` operator can only be used
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Ok(())
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}
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fn test_option() -> Option<i32>{
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let a:Result<i32, i32> = Ok(5);
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a?;//~ ERROR the `?` operator can only be used
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Some(5)
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}
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