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#[unstable(feature = "try_trait", issue = "42327")]
#[rustc_on_unimplemented(
    on(
        all(
            any(from_method = "from_error", from_method = "from_ok"),
            from_desugaring = "QuestionMark"
        ),
        message = "the `?` operator can only be used in {ItemContext} \
                    that returns `Result` or `Option` \
                    (or another type that implements `{Try}`)",
        label = "cannot use the `?` operator in {ItemContext} that returns `{Self}`",
        enclosing_scope = "this function should return `Result` or `Option` to accept `?`"
    ),
    on(
        all(from_method = "into_result", from_desugaring = "QuestionMark"),
        message = "the `?` operator can only be applied to values \
                    that implement `{Try}`",
        label = "the `?` operator cannot be applied to type `{Self}`"
    )
)]
#[doc(alias = "?")]
pub trait Try {
    
    #[unstable(feature = "try_trait", issue = "42327")]
    type Ok;
    
    #[unstable(feature = "try_trait", issue = "42327")]
    type Error;
    
    
    
    
    
    
    
    
    
    #[unstable(feature = "try_trait", issue = "42327")]
    fn into_result(self) -> Result<Self::Ok, Self::Error>;
    
    
    #[unstable(feature = "try_trait", issue = "42327")]
    fn from_error(v: Self::Error) -> Self;
    
    
    #[unstable(feature = "try_trait", issue = "42327")]
    fn from_ok(v: Self::Ok) -> Self;
}