Struct protobuf::SingularField [−][src]
pub struct SingularField<T> { /* fields omitted */ }
Like Option<T>
, but keeps the actual element on clear
.
Implementations
impl<T> SingularField<T>
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impl<T> SingularField<T>
[src]pub fn some(value: T) -> SingularField<T>
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Construct this object from given value.
pub fn is_some(&self) -> bool
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True iff this object contains data.
pub fn is_none(&self) -> bool
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True iff this object contains no data.
pub fn into_option(self) -> Option<T>
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Convert this object into Option
.
pub fn as_ref<'a>(&'a self) -> Option<&'a T>
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View data as Option
.
pub fn as_mut<'a>(&'a mut self) -> Option<&'a mut T>
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View data as mutable Option
.
pub fn unwrap_ref<'a>(&'a self) -> &'a T
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Unwrap data as reference.
pub fn unwrap_mut_ref<'a>(&'a mut self) -> &'a mut T
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Unwrap data as mutable reference.
pub fn unwrap(self) -> T
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Unwrap data, panic if not set.
pub fn unwrap_or(self, def: T) -> T
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Unwrap data or return given default value.
pub fn unwrap_or_else<F>(self, f: F) -> T where
F: FnOnce() -> T,
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F: FnOnce() -> T,
Unwrap data or return given default value.
pub fn map<U, F>(self, f: F) -> SingularPtrField<U> where
F: FnOnce(T) -> U,
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F: FnOnce(T) -> U,
Apply a function to contained element and store result in new SingularPtrField
.
pub fn iter<'a>(&'a self) -> IntoIter<&'a T>
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View as iterator over references.
pub fn mut_iter<'a>(&'a mut self) -> IntoIter<&'a mut T>
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View as iterator over mutable references.
pub fn clear(&mut self)
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Clear this object. Note, contained object destructor is not called, so allocated memory could be reused.
impl<T: Default> SingularField<T>
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impl<T: Default> SingularField<T>
[src]pub fn none() -> SingularField<T>
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Construct a SingularField
with no data.
pub fn from_option(option: Option<T>) -> SingularField<T>
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Construct SingularField
from Option
.
pub fn take(&mut self) -> Option<T>
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Return data as option, clear this object.
impl<T: Default + Clear> SingularField<T>
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impl<T: Default + Clear> SingularField<T>
[src]pub fn unwrap_or_default(self) -> T
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Get contained data, consume self. Return default value for type if this is empty.
pub fn set_default<'a>(&'a mut self) -> &'a mut T
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Initialize this object with default value. This operation can be more efficient then construction of clear element, because it may reuse previously contained object.
Trait Implementations
impl<T: Clone + Default> Clone for SingularField<T>
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impl<T: Clone + Default> Clone for SingularField<T>
[src]fn clone(&self) -> SingularField<T>
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pub fn clone_from(&mut self, source: &Self)
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impl<T: Default> Default for SingularField<T>
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impl<T: Default> Default for SingularField<T>
[src]fn default() -> SingularField<T>
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impl<'de, T: Deserialize<'de> + Default> Deserialize<'de> for SingularField<T>
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impl<'de, T: Deserialize<'de> + Default> Deserialize<'de> for SingularField<T>
[src]fn deserialize<D>(
deserializer: D
) -> Result<Self, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
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deserializer: D
) -> Result<Self, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
impl<T: Eq> Eq for SingularField<T>
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impl<T: Eq> Eq for SingularField<T>
[src]impl<T: Hash> Hash for SingularField<T>
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impl<T: Hash> Hash for SingularField<T>
[src]impl<'a, T> IntoIterator for &'a SingularField<T>
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impl<'a, T> IntoIterator for &'a SingularField<T>
[src]impl<T: PartialEq> PartialEq<SingularField<T>> for SingularField<T>
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impl<T: PartialEq> PartialEq<SingularField<T>> for SingularField<T>
[src]impl<T: Serialize> Serialize for SingularField<T>
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impl<T: Serialize> Serialize for SingularField<T>
[src]fn serialize<S>(
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
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&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
Auto Trait Implementations
impl<T> RefUnwindSafe for SingularField<T> where
T: RefUnwindSafe,
impl<T> RefUnwindSafe for SingularField<T> where
T: RefUnwindSafe,
impl<T> Send for SingularField<T> where
T: Send,
impl<T> Send for SingularField<T> where
T: Send,
impl<T> Sync for SingularField<T> where
T: Sync,
impl<T> Sync for SingularField<T> where
T: Sync,
impl<T> Unpin for SingularField<T> where
T: Unpin,
impl<T> Unpin for SingularField<T> where
T: Unpin,
impl<T> UnwindSafe for SingularField<T> where
T: UnwindSafe,
impl<T> UnwindSafe for SingularField<T> where
T: UnwindSafe,
Blanket Implementations
impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
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impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
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