Struct rustc_mir_build::thir::pattern::PatCtxt
source · struct PatCtxt<'a, 'tcx> {
tcx: TyCtxt<'tcx>,
param_env: ParamEnv<'tcx>,
typeck_results: &'a TypeckResults<'tcx>,
rust_2024_migration_suggestion: Option<Rust2024IncompatiblePatSugg>,
}
Fields§
§tcx: TyCtxt<'tcx>
§param_env: ParamEnv<'tcx>
§typeck_results: &'a TypeckResults<'tcx>
§rust_2024_migration_suggestion: Option<Rust2024IncompatiblePatSugg>
Used by the Rust 2024 migration lint.
Implementations§
source§impl<'a, 'tcx> PatCtxt<'a, 'tcx>
impl<'a, 'tcx> PatCtxt<'a, 'tcx>
sourcepub(super) fn const_to_pat(
&self,
c: Const<'tcx>,
ty: Ty<'tcx>,
id: HirId,
span: Span,
) -> Box<Pat<'tcx>>
pub(super) fn const_to_pat( &self, c: Const<'tcx>, ty: Ty<'tcx>, id: HirId, span: Span, ) -> Box<Pat<'tcx>>
Converts a constant to a pattern (if possible). This means aggregate values (like structs and enums) are converted to a pattern that matches the value (as if you’d compared via structural equality).
Only type system constants are supported, as we are using valtrees as an intermediate step. Unfortunately those don’t carry a type so we have to carry one ourselves.
source§impl<'a, 'tcx> PatCtxt<'a, 'tcx>
impl<'a, 'tcx> PatCtxt<'a, 'tcx>
fn lower_pattern(&mut self, pat: &'tcx Pat<'tcx>) -> Box<Pat<'tcx>>
fn lower_pattern_range_endpoint( &mut self, expr: Option<&'tcx Expr<'tcx>>, ) -> Result<(Option<PatRangeBoundary<'tcx>>, Option<Ascription<'tcx>>, Option<LocalDefId>), ErrorGuaranteed>
sourcefn error_on_literal_overflow(
&self,
expr: Option<&'tcx Expr<'tcx>>,
ty: Ty<'tcx>,
) -> Result<(), ErrorGuaranteed>
fn error_on_literal_overflow( &self, expr: Option<&'tcx Expr<'tcx>>, ty: Ty<'tcx>, ) -> Result<(), ErrorGuaranteed>
Overflowing literals are linted against in a late pass. This is mostly fine, except when we
encounter a range pattern like -130i8..2
: if we believe eval_bits
, this looks like a
range where the endpoints are in the wrong order. To avoid a confusing error message, we
check for overflow then.
This is only called when the range is already known to be malformed.
fn lower_pattern_range( &mut self, lo_expr: Option<&'tcx Expr<'tcx>>, hi_expr: Option<&'tcx Expr<'tcx>>, end: RangeEnd, ty: Ty<'tcx>, span: Span, ) -> Result<PatKind<'tcx>, ErrorGuaranteed>
fn lower_pattern_unadjusted(&mut self, pat: &'tcx Pat<'tcx>) -> Box<Pat<'tcx>>
fn lower_tuple_subpats( &mut self, pats: &'tcx [Pat<'tcx>], expected_len: usize, gap_pos: DotDotPos, ) -> Vec<FieldPat<'tcx>>
fn lower_patterns(&mut self, pats: &'tcx [Pat<'tcx>]) -> Box<[Box<Pat<'tcx>>]>
fn lower_opt_pattern( &mut self, pat: Option<&'tcx Pat<'tcx>>, ) -> Option<Box<Pat<'tcx>>>
fn slice_or_array_pattern( &mut self, span: Span, ty: Ty<'tcx>, prefix: &'tcx [Pat<'tcx>], slice: Option<&'tcx Pat<'tcx>>, suffix: &'tcx [Pat<'tcx>], ) -> PatKind<'tcx>
fn lower_variant_or_leaf( &mut self, res: Res, hir_id: HirId, span: Span, ty: Ty<'tcx>, subpatterns: Vec<FieldPat<'tcx>>, ) -> PatKind<'tcx>
sourcefn lower_path(
&mut self,
qpath: &QPath<'_>,
id: HirId,
span: Span,
) -> Box<Pat<'tcx>>
fn lower_path( &mut self, qpath: &QPath<'_>, id: HirId, span: Span, ) -> Box<Pat<'tcx>>
Takes a HIR Path. If the path is a constant, evaluates it and feeds
it to const_to_pat
. Any other path (like enum variants without fields)
is converted to the corresponding pattern via lower_variant_or_leaf
.
sourcefn lower_inline_const(
&mut self,
block: &'tcx ConstBlock,
id: HirId,
span: Span,
) -> PatKind<'tcx>
fn lower_inline_const( &mut self, block: &'tcx ConstBlock, id: HirId, span: Span, ) -> PatKind<'tcx>
Converts inline const patterns.
Trait Implementations§
source§impl<'tcx> UserAnnotatedTyHelpers<'tcx> for PatCtxt<'_, 'tcx>
impl<'tcx> UserAnnotatedTyHelpers<'tcx> for PatCtxt<'_, 'tcx>
fn tcx(&self) -> TyCtxt<'tcx>
fn typeck_results(&self) -> &TypeckResults<'tcx>
source§fn user_args_applied_to_ty_of_hir_id(
&self,
hir_id: HirId,
) -> Option<CanonicalUserType<'tcx>>
fn user_args_applied_to_ty_of_hir_id( &self, hir_id: HirId, ) -> Option<CanonicalUserType<'tcx>>
Auto Trait Implementations§
impl<'a, 'tcx> Freeze for PatCtxt<'a, 'tcx>
impl<'a, 'tcx> !RefUnwindSafe for PatCtxt<'a, 'tcx>
impl<'a, 'tcx> !Send for PatCtxt<'a, 'tcx>
impl<'a, 'tcx> !Sync for PatCtxt<'a, 'tcx>
impl<'a, 'tcx> Unpin for PatCtxt<'a, 'tcx>
impl<'a, 'tcx> !UnwindSafe for PatCtxt<'a, 'tcx>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
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: 48 bytes