[][src]Struct rustc_mir::hair::Expr

pub struct Expr<'tcx> {
    pub ty: Ty<'tcx>,
    pub temp_lifetime: Option<Scope>,
    pub span: Span,
    pub kind: ExprKind<'tcx>,
}
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The Hair trait implementor lowers their expressions (&'tcx H::Expr) into instances of this Expr enum. This lowering can be done basically as lazily or as eagerly as desired: every recursive reference to an expression in this enum is an ExprRef<'tcx>, which may in turn be another instance of this enum (boxed), or else an unlowered &'tcx H::Expr. Note that instances of Expr are very shortlived. They are created by Hair::to_expr, analyzed and converted into MIR, and then discarded.

If you compare Expr to the full compiler AST, you will see it is a good bit simpler. In fact, a number of the more straight-forward MIR simplifications are already done in the impl of Hair. For example, method calls and overloaded operators are absent: they are expected to be converted into Expr::Call instances.

Fields

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type of this expression

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lifetime of this expression if it should be spilled into a temporary; should be None only if in a constant context

🔬 This is a nightly-only experimental API. (rustc_private)

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span of the expression in the source

🔬 This is a nightly-only experimental API. (rustc_private)

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kind of expression

Trait Implementations

impl<'tcx> EvalInto<'tcx> for Expr<'tcx>
[src]

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impl<'a, 'tcx: 'a> ToRef for Expr<'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

impl<'tcx> Clone for Expr<'tcx>
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl<'tcx> Debug for Expr<'tcx>
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Formats the value using the given formatter. Read more

impl<'tcx> Mirror<'tcx> for Expr<'tcx>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Auto Trait Implementations

impl<'tcx> !Send for Expr<'tcx>

impl<'tcx> !Sync for Expr<'tcx>

Blanket Implementations

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

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> From for T
[src]

Performs the conversion.

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

Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

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

Important traits for &'a mut R

Immutably borrows from an owned value. Read more

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

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
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Important traits for &'a mut R

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<E> SpecializationError for E
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

impl<T> Erased for T
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impl<T> Send for T where
    T: ?Sized
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impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T

impl<T> MaybeResult for T
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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

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