Struct zng_var::types::SourceVarTag
source · pub struct SourceVarTag(/* private fields */);
Expand description
Identifies the source variable in another variable a value update.
The Var::set_from
and bidirectional map/binding methods use this tag to avoid an extra “map_back” caused by “map” itself.
The tag is only equal to the same variable.
Implementations§
Trait Implementations§
source§impl Clone for SourceVarTag
impl Clone for SourceVarTag
source§fn clone(&self) -> SourceVarTag
fn clone(&self) -> SourceVarTag
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for SourceVarTag
impl Debug for SourceVarTag
source§impl PartialEq for SourceVarTag
impl PartialEq for SourceVarTag
source§fn eq(&self, other: &SourceVarTag) -> bool
fn eq(&self, other: &SourceVarTag) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.impl Copy for SourceVarTag
impl Eq for SourceVarTag
impl StructuralPartialEq for SourceVarTag
Auto Trait Implementations§
impl Freeze for SourceVarTag
impl RefUnwindSafe for SourceVarTag
impl Send for SourceVarTag
impl Sync for SourceVarTag
impl Unpin for SourceVarTag
impl UnwindSafe for SourceVarTag
Blanket Implementations§
source§impl<T> AnyVarValue for Twhere
T: VarValue,
impl<T> AnyVarValue for Twhere
T: VarValue,
source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Access to mut
dyn Any
methods.source§fn clone_boxed(&self) -> Box<dyn AnyVarValue>
fn clone_boxed(&self) -> Box<dyn AnyVarValue>
Clone the value.
source§fn clone_boxed_var(&self) -> Box<dyn AnyVar>
fn clone_boxed_var(&self) -> Box<dyn AnyVar>
Clone the value into a new boxed
LocalVar<Self>
.source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Checks if this value is equivalent to the given key. Read more
§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.§impl<T> Instrument for T
impl<T> Instrument for T
§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
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 moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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