[][src]Struct rustc::mir::BlockTailInfo

pub struct BlockTailInfo {
    pub tail_result_is_ignored: bool,
}
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

BlockTailInfo is attached to the LocalDecl for temporaries created during evaluation of expressions in a block tail expression; that is, a block like { STMT_1; STMT_2; EXPR }.

It is used to improve diagnostics when such temporaries are involved in borrow_check errors, e.g., explanations of where the temporaries come from, when their destructors are run, and/or how one might revise the code to satisfy the borrow checker's rules.

Fields

tail_result_is_ignored: bool
⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

If true, then the value resulting from evaluating this tail expression is ignored by the block's expression context.

Examples include { ...; tail }; and let _ = { ...; tail }; but not e.g., let _x = { ...; tail };

Trait Implementations

impl Clone for BlockTailInfo[src]

impl Debug for BlockTailInfo[src]

impl Decodable for BlockTailInfo[src]

impl Encodable for BlockTailInfo[src]

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for BlockTailInfo[src]

impl<'tcx> Lift<'tcx> for BlockTailInfo[src]

type Lifted = Self

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

impl<'tcx> TypeFoldable<'tcx> for BlockTailInfo[src]

Auto Trait Implementations

impl RefUnwindSafe for BlockTailInfo

impl Send for BlockTailInfo

impl Sync for BlockTailInfo

impl Unpin for BlockTailInfo

impl UnwindSafe for BlockTailInfo

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<'a, T> Captures<'a> for T where
    T: ?Sized
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impl<T> Decodable for T where
    T: UseSpecializedDecodable
[src]

impl<T> Encodable for T where
    T: UseSpecializedEncodable + ?Sized
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impl<T> Erased for T[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> MaybeResult<T> for T[src]

type Error = !

⚙️ This is an internal compiler API. (rustc_private)

This crate is being loaded from the sysroot, a permanently unstable location for private compiler dependencies. It is not intended for general use. Prefer using a public version of this crate from crates.io via Cargo.toml.

impl<E> SpecializationError for E[src]

impl<'tcx, T> Subst<'tcx> for T where
    T: TypeFoldable<'tcx>, 
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.