pub struct Flags { /* private fields */ }
Expand description
Flags that may be passed when initializing a Channel
.
Implementations
sourceimpl Flags
impl Flags
sourcepub const USEVC: Self = _
pub const USEVC: Self = _
Always use TCP queries (the “virtual circuit”) instead of UDP queries. Normally, TCP is only used if a UDP query yields a truncated result.
sourcepub const IGNTC: Self = _
pub const IGNTC: Self = _
If a truncated response to a UDP query is received, do not fall back to TCP; simply continue on with the truncated response.
sourcepub const NORECURSE: Self = _
pub const NORECURSE: Self = _
Do not set the “recursion desired” bit on outgoing queries, so that the name server being contacted will not try to fetch the answer from other servers if it doesn’t know the answer locally.
sourcepub const STAYOPEN: Self = _
pub const STAYOPEN: Self = _
Do not close communications sockets when the number of active queries drops to zero.
sourcepub const NOSEARCH: Self = _
pub const NOSEARCH: Self = _
Do not use the default search domains; only query hostnames as-is or as aliases.
sourcepub const NOALIASES: Self = _
pub const NOALIASES: Self = _
Do not honor the HOSTALIASES environment variable, which normally specifies a file of hostname translations.
sourcepub const NOCHECKRESP: Self = _
pub const NOCHECKRESP: Self = _
Do not discard responses with the SERVFAIL, NOTIMP, or REFUSED response code or responses whose questions don’t match the questions in the request. Primarily useful for writing clients which might be used to test or debug name servers.
sourcepub const fn from_bits(bits: i32) -> Option<Self>
pub const fn from_bits(bits: i32) -> Option<Self>
Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.
sourcepub const fn from_bits_truncate(bits: i32) -> Self
pub const fn from_bits_truncate(bits: i32) -> Self
Convert from underlying bit representation, dropping any bits that do not correspond to flags.
sourcepub const unsafe fn from_bits_unchecked(bits: i32) -> Self
pub const unsafe fn from_bits_unchecked(bits: i32) -> Self
Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).
Safety
The caller of the bitflags!
macro can chose to allow or
disallow extra bits for their bitflags type.
The caller of from_bits_unchecked()
has to ensure that
all bits correspond to a defined flag or that extra bits
are valid for this bitflags type.
sourcepub const fn intersects(&self, other: Self) -> bool
pub const fn intersects(&self, other: Self) -> bool
Returns true
if there are flags common to both self
and other
.
sourcepub const fn contains(&self, other: Self) -> bool
pub const fn contains(&self, other: Self) -> bool
Returns true
if all of the flags in other
are contained within self
.
sourcepub fn set(&mut self, other: Self, value: bool)
pub fn set(&mut self, other: Self, value: bool)
Inserts or removes the specified flags depending on the passed value.
sourcepub const fn intersection(self, other: Self) -> Self
pub const fn intersection(self, other: Self) -> Self
Returns the intersection between the flags in self
and
other
.
Specifically, the returned set contains only the flags which are
present in both self
and other
.
This is equivalent to using the &
operator (e.g.
ops::BitAnd
), as in flags & other
.
sourcepub const fn union(self, other: Self) -> Self
pub const fn union(self, other: Self) -> Self
Returns the union of between the flags in self
and other
.
Specifically, the returned set contains all flags which are
present in either self
or other
, including any which are
present in both (see Self::symmetric_difference
if that
is undesirable).
This is equivalent to using the |
operator (e.g.
ops::BitOr
), as in flags | other
.
sourcepub const fn difference(self, other: Self) -> Self
pub const fn difference(self, other: Self) -> Self
Returns the difference between the flags in self
and other
.
Specifically, the returned set contains all flags present in
self
, except for the ones present in other
.
It is also conceptually equivalent to the “bit-clear” operation:
flags & !other
(and this syntax is also supported).
This is equivalent to using the -
operator (e.g.
ops::Sub
), as in flags - other
.
sourcepub const fn symmetric_difference(self, other: Self) -> Self
pub const fn symmetric_difference(self, other: Self) -> Self
Returns the symmetric difference between the flags
in self
and other
.
Specifically, the returned set contains the flags present which
are present in self
or other
, but that are not present in
both. Equivalently, it contains the flags present in exactly
one of the sets self
and other
.
This is equivalent to using the ^
operator (e.g.
ops::BitXor
), as in flags ^ other
.
sourcepub const fn complement(self) -> Self
pub const fn complement(self) -> Self
Returns the complement of this set of flags.
Specifically, the returned set contains all the flags which are
not set in self
, but which are allowed for this type.
Alternatively, it can be thought of as the set difference
between Self::all()
and self
(e.g. Self::all() - self
)
This is equivalent to using the !
operator (e.g.
ops::Not
), as in !flags
.
Trait Implementations
sourceimpl BitAndAssign<Flags> for Flags
impl BitAndAssign<Flags> for Flags
sourcefn bitand_assign(&mut self, other: Self)
fn bitand_assign(&mut self, other: Self)
Disables all flags disabled in the set.
sourceimpl BitOrAssign<Flags> for Flags
impl BitOrAssign<Flags> for Flags
sourcefn bitor_assign(&mut self, other: Self)
fn bitor_assign(&mut self, other: Self)
Adds the set of flags.
sourceimpl BitXorAssign<Flags> for Flags
impl BitXorAssign<Flags> for Flags
sourcefn bitxor_assign(&mut self, other: Self)
fn bitxor_assign(&mut self, other: Self)
Toggles the set of flags.
sourceimpl Extend<Flags> for Flags
impl Extend<Flags> for Flags
sourcefn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)
fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)
sourcefn extend_one(&mut self, item: A)
fn extend_one(&mut self, item: A)
extend_one
)sourcefn extend_reserve(&mut self, additional: usize)
fn extend_reserve(&mut self, additional: usize)
extend_one
)sourceimpl FromIterator<Flags> for Flags
impl FromIterator<Flags> for Flags
sourcefn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self
fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self
sourceimpl Ord for Flags
impl Ord for Flags
1.21.0 · sourcefn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
1.21.0 · sourcefn min(self, other: Self) -> Selfwhere
Self: Sized,
fn min(self, other: Self) -> Selfwhere
Self: Sized,
1.50.0 · sourcefn clamp(self, min: Self, max: Self) -> Selfwhere
Self: Sized + PartialOrd<Self>,
fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: Sized + PartialOrd<Self>,
sourceimpl PartialOrd<Flags> for Flags
impl PartialOrd<Flags> for Flags
sourcefn partial_cmp(&self, other: &Flags) -> Option<Ordering>
fn partial_cmp(&self, other: &Flags) -> Option<Ordering>
1.0.0 · sourcefn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresourceimpl SubAssign<Flags> for Flags
impl SubAssign<Flags> for Flags
sourcefn sub_assign(&mut self, other: Self)
fn sub_assign(&mut self, other: Self)
Disables all flags enabled in the set.