reth_db::mdbx

Struct WriteFlags

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pub struct WriteFlags(/* private fields */);
Available on crate feature mdbx only.
Expand description

Write options.

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impl WriteFlags

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pub const UPSERT: WriteFlags

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pub const NO_OVERWRITE: WriteFlags

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pub const NO_DUP_DATA: WriteFlags

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pub const CURRENT: WriteFlags

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pub const ALLDUPS: WriteFlags

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pub const RESERVE: WriteFlags

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pub const APPEND: WriteFlags

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pub const APPEND_DUP: WriteFlags

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pub const MULTIPLE: WriteFlags

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impl WriteFlags

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pub const fn empty() -> WriteFlags

Get a flags value with all bits unset.

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pub const fn all() -> WriteFlags

Get a flags value with all known bits set.

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pub const fn bits(&self) -> u32

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: u32) -> Option<WriteFlags>

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: u32) -> WriteFlags

Convert from a bits value, unsetting any unknown bits.

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

Convert from a bits value exactly.

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

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: WriteFlags) -> 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: WriteFlags) -> 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: WriteFlags)

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

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

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: WriteFlags)

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

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

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

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

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

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

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

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

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: WriteFlags) -> WriteFlags

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

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pub const fn complement(self) -> WriteFlags

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

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impl WriteFlags

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

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<WriteFlags>

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 WriteFlags

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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 WriteFlags

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

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

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type Output = WriteFlags

The resulting type after applying the & operator.
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impl BitAndAssign for WriteFlags

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fn bitand_assign(&mut self, other: WriteFlags)

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

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impl BitOr for WriteFlags

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

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

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type Output = WriteFlags

The resulting type after applying the | operator.
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impl BitOrAssign for WriteFlags

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fn bitor_assign(&mut self, other: WriteFlags)

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

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impl BitXor for WriteFlags

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

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

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type Output = WriteFlags

The resulting type after applying the ^ operator.
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impl BitXorAssign for WriteFlags

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fn bitxor_assign(&mut self, other: WriteFlags)

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

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impl Default for WriteFlags

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fn default() -> WriteFlags

Returns the “default value” for a type. Read more
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impl Extend<WriteFlags> for WriteFlags

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

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 #72631)
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 #72631)
Reserves capacity in a collection for the given number of additional elements. Read more
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impl Flags for WriteFlags

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

The set of defined flags.
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type Bits = u32

The underlying bits type.
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fn bits(&self) -> u32

Get the underlying bits value. Read more
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fn from_bits_retain(bits: u32) -> WriteFlags

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 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 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 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 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 FromIterator<WriteFlags> for WriteFlags

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

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

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impl IntoIterator for WriteFlags

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type Item = WriteFlags

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

Which kind of iterator are we turning this into?
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fn into_iter(self) -> <WriteFlags as IntoIterator>::IntoIter

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

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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 WriteFlags

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fn not(self) -> WriteFlags

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

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type Output = WriteFlags

The resulting type after applying the ! operator.
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impl Octal for WriteFlags

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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 Sub for WriteFlags

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

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 = WriteFlags

The resulting type after applying the - operator.
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impl SubAssign for WriteFlags

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fn sub_assign(&mut self, other: WriteFlags)

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 WriteFlags

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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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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: 4 bytes