Struct VisitorFlags 

pub struct VisitorFlags(/* private fields */);

Flags that can be used to influence the behaviour of Visit::visit methods.

Implementations

impl VisitorFlags

pub const NONE: VisitorFlags

No flags set, do nothing special.

pub const SERIALIZE_EVERYTHING: VisitorFlags

Tell crate::variable::InheritableVariable::visit to assume that it’s VariableFlags::MODIFIED is set, and therefore write its data. Otherwise, InheritableVariable has the special property of not writing itself when the MODIFIED flag is not set.

impl VisitorFlags

pub const fn empty() -> VisitorFlags

Get a flags value with all bits unset.

pub const fn all() -> VisitorFlags

Get a flags value with all known bits set.

pub const fn bits(&self) -> u32

Get the underlying bits value.

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

pub const fn from_bits(bits: u32) -> Option<VisitorFlags>

Convert from a bits value.

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

pub const fn from_bits_truncate(bits: u32) -> VisitorFlags

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u32) -> VisitorFlags

Convert from a bits value exactly.

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

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.

pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

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

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

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

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

pub fn insert(&mut self, other: VisitorFlags)

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

pub fn remove(&mut self, other: VisitorFlags)

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.

pub fn toggle(&mut self, other: VisitorFlags)

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

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

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

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

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

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

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

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

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.

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

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

pub const fn complement(self) -> VisitorFlags

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

impl VisitorFlags

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

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.

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

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

impl Binary for VisitorFlags

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

Formats the value using the given formatter.

impl BitAnd for VisitorFlags

fn bitand(self, other: VisitorFlags) -> VisitorFlags

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

type Output = VisitorFlags

The resulting type after applying the & operator.

impl BitAndAssign for VisitorFlags

fn bitand_assign(&mut self, other: VisitorFlags)

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

impl BitOr for VisitorFlags

fn bitor(self, other: VisitorFlags) -> VisitorFlags

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

type Output = VisitorFlags

The resulting type after applying the | operator.

impl BitOrAssign for VisitorFlags

fn bitor_assign(&mut self, other: VisitorFlags)

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

impl BitXor for VisitorFlags

fn bitxor(self, other: VisitorFlags) -> VisitorFlags

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

type Output = VisitorFlags

The resulting type after applying the ^ operator.

impl BitXorAssign for VisitorFlags

fn bitxor_assign(&mut self, other: VisitorFlags)

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

impl Extend<VisitorFlags> for VisitorFlags

fn extend<T>(&mut self, iterator: T)

where T: IntoIterator<Item = VisitorFlags>,

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

fn extend_one(&mut self, item: A)

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

Extends a collection with exactly one element.

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.

impl Flags for VisitorFlags

const FLAGS: &'static [Flag<VisitorFlags>]

The set of defined flags.

type Bits = u32

The underlying bits type.

fn bits(&self) -> u32

Get the underlying bits value.

fn from_bits_retain(bits: u32) -> VisitorFlags

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn contains_unknown_bits(&self) -> bool

This method will return true if any unknown bits are set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

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

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

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.

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.

fn truncate(&mut self)

where Self: Sized,

Remove any unknown bits from the flags.

fn insert(&mut self, other: Self)

where Self: Sized,

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

fn remove(&mut self, other: Self)

where Self: Sized,

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

fn toggle(&mut self, other: Self)

where Self: Sized,

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

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.

fn clear(&mut self)

where Self: Sized,

Unsets all bits in the flags.

fn intersection(self, other: Self) -> Self

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

fn union(self, other: Self) -> Self

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

fn difference(self, other: Self) -> Self

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

fn symmetric_difference(self, other: Self) -> Self

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

fn complement(self) -> Self

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

impl FromIterator<VisitorFlags> for VisitorFlags

fn from_iter<T>(iterator: T) -> VisitorFlags

where T: IntoIterator<Item = VisitorFlags>,

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

impl IntoIterator for VisitorFlags

type Item = VisitorFlags

The type of the elements being iterated over.

type IntoIter = Iter<VisitorFlags>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <VisitorFlags as IntoIterator>::IntoIter

Creates an iterator from a value.

impl LowerHex for VisitorFlags

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

Formats the value using the given formatter.

impl Not for VisitorFlags

fn not(self) -> VisitorFlags

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

type Output = VisitorFlags

The resulting type after applying the ! operator.

impl Octal for VisitorFlags

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

Formats the value using the given formatter.

impl Sub for VisitorFlags

fn sub(self, other: VisitorFlags) -> VisitorFlags

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.

type Output = VisitorFlags

The resulting type after applying the - operator.

impl SubAssign for VisitorFlags

fn sub_assign(&mut self, other: VisitorFlags)

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.

impl UpperHex for VisitorFlags

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

Formats the value using the given formatter.