Struct rustc_mir::transform::early_otherwise_branch::EarlyOtherwiseBranch[−][src]

pub struct EarlyOtherwiseBranch;
Expand description

This pass optimizes something like

let x: Option<()>;
let y: Option<()>;
match (x,y) {
    (Some(_), Some(_)) => {0},
    _ => {1}
}

into something like

let x: Option<()>;
let y: Option<()>;
let discriminant_x = // get discriminant of x
let discriminant_y = // get discriminant of y
if discriminant_x != discriminant_y || discriminant_x == None {1} else {0}

Trait Implementations

impl<'tcx> MirPass<'tcx> for EarlyOtherwiseBranch[src]

fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>)[src]

fn name(&self) -> Cow<'_, str>[src]

Auto Trait Implementations

impl RefUnwindSafe for EarlyOtherwiseBranch

impl Send for EarlyOtherwiseBranch

impl Sync for EarlyOtherwiseBranch

impl Unpin for EarlyOtherwiseBranch

impl UnwindSafe for EarlyOtherwiseBranch

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

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

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

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

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

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

pub fn from(t: T) -> T[src]

Performs the conversion.

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

pub fn into(self) -> U[src]

Performs the conversion.

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.

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

Performs the conversion.

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.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.

impl<T> WithConstness for T[src]

fn with_constness(self, constness: Constness) -> ConstnessAnd<Self>[src]

fn with_const(self) -> ConstnessAnd<Self>[src]

fn without_const(self) -> ConstnessAnd<Self>[src]