Struct rustc_middle::ty::context::DeducedParamAttrs

pub struct DeducedParamAttrs {
    pub read_only: bool,
}

Parameter attributes that can only be determined by examining the body of a function instead of just its signature.

These can be useful for optimization purposes when a function is directly called. We compute them and store them into the crate metadata so that downstream crates can make use of them.

Right now, we only have read_only, but no_capture and no_alias might be useful in the future.

Fields

read_only: bool

The parameter is marked immutable in the function and contains no UnsafeCell (i.e. its type is freeze).

Trait Implementations

impl Clone for DeducedParamAttrs

fn clone(&self) -> DeducedParamAttrs

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DeducedParamAttrs

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for DeducedParamAttrs

fn decode(__decoder: &mut __D) -> Self

impl Default for DeducedParamAttrs

fn default() -> DeducedParamAttrs

Returns the “default value” for a type.

impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for DeducedParamAttrs

fn encode(&self, __encoder: &mut __E)

impl EraseType for DeducedParamAttrs

type Result = [u8; 1]

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for DeducedParamAttrs

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher )

impl ParameterizedOverTcx for DeducedParamAttrs

type Value<'tcx> = DeducedParamAttrs

impl PartialEq<DeducedParamAttrs> for DeducedParamAttrs

fn eq(&self, other: &DeducedParamAttrs) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D> for DeducedParamAttrs

fn decode(decoder: &mut D) -> &'tcx Self

impl Copy for DeducedParamAttrs

impl StructuralPartialEq for DeducedParamAttrs

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte