PathsToNested in rustc_infer::infer::canonical::ir::search_graph - Rust
Description: Tracks how nested goals have been accessed. This is necessary to disable global cache entries if computing them would otherwise result in a cycle or access a provisional cache entry.

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## PathsToNested

# Struct PathsToNested

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    pub struct PathsToNested(InternalBitFlags);

Expand description

Tracks how nested goals have been accessed. This is necessary to disable global cache entries if computing them would otherwise result in a cycle or access a provisional cache entry.

## Tuple Fields§

§`0: InternalBitFlags`

## Implementations§

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### impl PathsToNested

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#### pub const EMPTY: PathsToNested

The initial value when adding a goal to its own nested goals.

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#### pub const INDUCTIVE: PathsToNested

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#### pub const UNKNOWN: PathsToNested

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#### pub const COINDUCTIVE: PathsToNested

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#### pub const FORCED_AMBIGUITY: PathsToNested

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### impl PathsToNested

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#### pub const fn empty() -> PathsToNested

Get a flags value with all bits unset.

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#### pub const fn all() -> PathsToNested

Get a flags value with all known bits set.

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#### pub const fn bits(&self) -> u8

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

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#### pub const fn from_bits(bits: u8) -> Option<PathsToNested>

Convert from a bits value.

This method will return `None` if any unknown bits are set.

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#### pub const fn from_bits_truncate(bits: u8) -> PathsToNested

Convert from a bits value, unsetting any unknown bits.

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#### pub const fn from_bits_retain(bits: u8) -> PathsToNested

Convert from a bits value exactly.

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#### pub fn from_name(name: &str) -> Option<PathsToNested>

Get a flags value with the bits of a flag with the given name set.

This method will return `None` if `name` is empty or doesn’t correspond to any named flag.

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#### pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

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#### pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

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#### pub const fn intersects(&self, other: PathsToNested) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

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#### pub const fn contains(&self, other: PathsToNested) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

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#### pub fn insert(&mut self, other: PathsToNested)

The bitwise or (`|`) of the bits in two flags values.

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#### pub fn remove(&mut self, other: PathsToNested)

The intersection of a source flags value with the complement of a target flags value (`&!`).

This method is not equivalent to `self & !other` when `other` has unknown bits set. `remove` won’t truncate `other`, but the `!` operator will.

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#### pub fn toggle(&mut self, other: PathsToNested)

The bitwise exclusive-or (`^`) of the bits in two flags values.

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#### pub fn set(&mut self, other: PathsToNested, value: bool)

Call `insert` when `value` is `true` or `remove` when `value` is `false`.

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#### pub const fn intersection(self, other: PathsToNested) -> PathsToNested

The bitwise and (`&`) of the bits in two flags values.

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#### pub const fn union(self, other: PathsToNested) -> PathsToNested

The bitwise or (`|`) of the bits in two flags values.

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#### pub const fn difference(self, other: PathsToNested) -> PathsToNested

The intersection of a source flags value with the complement of a target flags value (`&!`).

This method is not equivalent to `self & !other` when `other` has unknown bits set. `difference` won’t truncate `other`, but the `!` operator will.

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#### pub const fn symmetric_difference(self, other: PathsToNested) -> PathsToNested

The bitwise exclusive-or (`^`) of the bits in two flags values.

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#### pub const fn complement(self) -> PathsToNested

The bitwise negation (`!`) of the bits in a flags value, truncating the result.

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### impl PathsToNested

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#### pub const fn iter(&self) -> Iter<PathsToNested>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

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#### pub const fn iter_names(&self) -> IterNames<PathsToNested>

Yield a set of contained named flags values.

This method is like `iter`, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

## Trait Implementations§

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### impl Binary for PathsToNested

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

Formats the value using the given formatter. Read more
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### impl BitAnd for PathsToNested

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#### fn bitand(self, other: PathsToNested) -> PathsToNested

The bitwise and (`&`) of the bits in two flags values.

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#### type Output = PathsToNested

The resulting type after applying the `&` operator.
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### impl BitAndAssign for PathsToNested

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#### fn bitand_assign(&mut self, other: PathsToNested)

The bitwise and (`&`) of the bits in two flags values.

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### impl BitOr for PathsToNested

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#### fn bitor(self, other: PathsToNested) -> PathsToNested

The bitwise or (`|`) of the bits in two flags values.

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#### type Output = PathsToNested

The resulting type after applying the `|` operator.
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### impl BitOrAssign for PathsToNested

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#### fn bitor_assign(&mut self, other: PathsToNested)

The bitwise or (`|`) of the bits in two flags values.

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### impl BitXor for PathsToNested

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#### fn bitxor(self, other: PathsToNested) -> PathsToNested

The bitwise exclusive-or (`^`) of the bits in two flags values.

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#### type Output = PathsToNested

The resulting type after applying the `^` operator.
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### impl BitXorAssign for PathsToNested

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#### fn bitxor_assign(&mut self, other: PathsToNested)

The bitwise exclusive-or (`^`) of the bits in two flags values.

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### impl Clone for PathsToNested

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#### fn clone(&self) -> PathsToNested

Returns a duplicate of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl Copy for PathsToNested

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### impl Debug for PathsToNested

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

Formats the value using the given formatter. Read more
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### impl Eq for PathsToNested

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### impl Extend<PathsToNested> for PathsToNested

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#### fn extend<T>(&mut self, iterator: T)
where T: IntoIterator<Item = PathsToNested>,

The bitwise or (`|`) of the bits in each flags value.

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#### fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (`extend_one`)
Extends a collection with exactly one element.
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#### fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (`extend_one`)
Reserves capacity in a collection for the given number of additional elements. Read more
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### impl Flags for PathsToNested

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#### const FLAGS: &'static [Flag<PathsToNested>]

The set of defined flags.
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#### type Bits = u8

The underlying bits type.
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#### fn bits(&self) -> u8

Get the underlying bits value. Read more
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#### fn from_bits_retain(bits: u8) -> PathsToNested

Convert from a bits value exactly.
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#### fn empty() -> Self

Get a flags value with all bits unset.
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#### fn all() -> Self

Get a flags value with all known bits set.
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#### fn contains_unknown_bits(&self) -> bool

This method will return `true` if any unknown bits are set.
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#### fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value. Read more
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#### fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.
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#### fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set. Read more
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#### fn iter(&self) -> Iter<Self>

Yield a set of contained flags values. Read more
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#### fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values. Read more
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#### fn iter_defined_names() -> IterDefinedNames<Self>

Yield a set of all named flags defined by `Self::FLAGS`.
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#### fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.
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#### fn is_all(&self) -> bool

Whether all known bits in this flags value are set.
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#### fn intersects(&self, other: Self) -> bool
where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.
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#### fn contains(&self, other: Self) -> bool
where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.
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#### fn truncate(&mut self)
where Self: Sized,

Remove any unknown bits from the flags.
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#### fn insert(&mut self, other: Self)
where Self: Sized,

The bitwise or (`|`) of the bits in two flags values.
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#### fn remove(&mut self, other: Self)
where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (`&!`). Read more
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#### fn toggle(&mut self, other: Self)
where Self: Sized,

The bitwise exclusive-or (`^`) of the bits in two flags values.
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#### fn set(&mut self, other: Self, value: bool)
where Self: Sized,

Call `Flags::insert` when `value` is `true` or `Flags::remove` when `value` is `false`.
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#### fn clear(&mut self)
where Self: Sized,

Unsets all bits in the flags.
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#### fn intersection(self, other: Self) -> Self

The bitwise and (`&`) of the bits in two flags values.
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#### fn union(self, other: Self) -> Self

The bitwise or (`|`) of the bits in two flags values.
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#### fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (`&!`). Read more
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#### fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (`^`) of the bits in two flags values.
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#### fn complement(self) -> Self

The bitwise negation (`!`) of the bits in a flags value, truncating the result.
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### impl From<PathKind> for PathsToNested

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#### fn from(path: PathKind) -> PathsToNested

Converts to this type from the input type.
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### impl FromIterator<PathsToNested> for PathsToNested

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#### fn from_iter<T>(iterator: T) -> PathsToNested
where T: IntoIterator<Item = PathsToNested>,

The bitwise or (`|`) of the bits in each flags value.

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### impl IntoIterator for PathsToNested

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#### type Item = PathsToNested

The type of the elements being iterated over.
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#### type IntoIter = Iter<PathsToNested>

Which kind of iterator are we turning this into?
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#### fn into_iter(self) -> Iter<PathsToNested>

Creates an iterator from a value. Read more
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### impl LowerHex for PathsToNested

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

Formats the value using the given formatter. Read more
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### impl Not for PathsToNested

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#### fn not(self) -> PathsToNested

The bitwise negation (`!`) of the bits in a flags value, truncating the result.

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#### type Output = PathsToNested

The resulting type after applying the `!` operator.
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### impl Octal for PathsToNested

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

Formats the value using the given formatter. Read more
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### impl PartialEq for PathsToNested

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

Tests for `self` and `other` values to be equal, and is used by `==`.
1.0.0 (const: unstable) · Source§

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

Tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl StructuralPartialEq for PathsToNested

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### impl Sub for PathsToNested

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#### fn sub(self, other: PathsToNested) -> PathsToNested

The intersection of a source flags value with the complement of a target flags value (`&!`).

This method is not equivalent to `self & !other` when `other` has unknown bits set. `difference` won’t truncate `other`, but the `!` operator will.

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#### type Output = PathsToNested

The resulting type after applying the `-` operator.
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### impl SubAssign for PathsToNested

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#### fn sub_assign(&mut self, other: PathsToNested)

The intersection of a source flags value with the complement of a target flags value (`&!`).

This method is not equivalent to `self & !other` when `other` has unknown bits set. `difference` won’t truncate `other`, but the `!` operator will.

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### impl UpperHex for PathsToNested

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

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl DynSend for PathsToNested

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### impl DynSync for PathsToNested

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### impl Freeze for PathsToNested

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### impl RefUnwindSafe for PathsToNested

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### impl Send for PathsToNested

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### impl Sync for PathsToNested

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### impl Unpin for PathsToNested

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### impl UnsafeUnpin for PathsToNested

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### impl UnwindSafe for PathsToNested

## Blanket Implementations§

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### impl<T> Aligned for T

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#### const ALIGN: Alignment

Alignment of `Self`.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> AnyEq for T
where T: Any + PartialEq,

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#### fn equals(&self, other: &(dyn Any + 'static)) -> bool

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#### fn as_any(&self) -> &(dyn Any + 'static)

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
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### impl<T, R> CollectAndApply<T, R> for T

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#### fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to `f(&iter.collect::<Vec<_>>())`.

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#### type Output = R

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### impl<T> DynClone for T
where T: Clone,

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#### fn __clone_box(&self, _: Private) -> *mut ()

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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
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### impl<T> ErasedDestructor for T
where T: 'static,

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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `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 more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `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 more
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### impl<K> IntoQueryKey<K> for K

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#### fn into_query_key(self) -> K

Argument conversion from `Self` to `K`. This should always be a very cheap conversion, e.g. `LocalDefId::to_def_id`.
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### impl<T> MaybeResult<T> for T

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#### type Error = !

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#### fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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#### fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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### impl<T> Pointable for T

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#### const ALIGN: usize

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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#### fn upcast(self, interner: I) -> U

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### impl<I, T> UpcastFrom<I, T> for T

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#### fn upcast_from(from: T, _tcx: I) -> T

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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a `WithDispatch` wrapper. Read more

## 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