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SqliteValueRef

Struct SqliteValueRef 

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pub struct SqliteValueRef<'r>(/* private fields */);
Available on crate feature _sqlite only.
Expand description

A borrowed reference to a sqlite3_value.

Semantically, this behaves as a reference to SqliteValue.

ยงNote: Decoding is Stateful

See SqliteValue for details.

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impl<'r> SqliteValueRef<'r>

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pub fn try_to_owned(&self) -> Result<SqliteValue, SqliteError>

Attempt to duplicate the internal sqlite3_value with sqlite3_value_dup().

Returns an error if the call returns a null pointer, indicating that SQLite was unable to allocate the additional memory required.

Non-panicking version of Self::try_to_owned().

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impl<'r> ValueRef<'r> for SqliteValueRef<'r>

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fn to_owned(&self) -> SqliteValue

Attempt to duplicate the internal sqlite3_value with sqlite3_value_dup().

ยงPanics

If sqlite3_value_dup() returns a null pointer, indicating an out-of-memory condition.

See Self::try_to_owned() for a non-panicking version.

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type Database = Sqlite

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fn type_info(&self) -> Cow<'_, SqliteTypeInfo>

Get the type information for this value.
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fn is_null(&self) -> bool

Returns true if the SQL value is NULL.

Auto Trait Implementationsยง

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impl<'r> !Freeze for SqliteValueRef<'r>

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impl<'r> !RefUnwindSafe for SqliteValueRef<'r>

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impl<'r> !Send for SqliteValueRef<'r>

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impl<'r> !Sync for SqliteValueRef<'r>

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impl<'r> Unpin for SqliteValueRef<'r>

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impl<'r> !UnwindSafe for SqliteValueRef<'r>

Blanket Implementationsยง

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self> โ“˜

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 more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> โ“˜
where F: FnOnce(&Self) -> bool,

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
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more