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ExifEntryRef

Struct ExifEntryRef 

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pub struct ExifEntryRef<'a> { /* private fields */ }
Expand description

Eager view into a single Exif entry, carrying the IFD namespace it came from. Yielded by crate::Exif::entries.

Supersedes ExifEntry, which exposes pub fields and therefore cannot grow the ifd_kind accessor without a breaking change. Fields here are private specifically so that future namespace/context information can be added without another type.

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impl<'a> ExifEntryRef<'a>

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pub fn ifd(&self) -> IfdIndex

Position in the IFD chain (IfdIndex::MAIN for the primary image).

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pub fn ifd_kind(&self) -> IfdKind

IFD namespace this entry was found in. Together with Self::ifd and Self::tag this identifies the entry unambiguously.

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pub fn tag(&self) -> TagOrCode

Recognized tag, or raw u16 code if not in ExifTag.

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pub fn value(&self) -> &'a EntryValue

The parsed value, borrowed from the parent crate::Exif.

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impl<'a> Clone for ExifEntryRef<'a>

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fn clone(&self) -> ExifEntryRef<'a>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'a> Copy for ExifEntryRef<'a>

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impl<'a> Debug for ExifEntryRef<'a>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> Freeze for ExifEntryRef<'a>

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impl<'a> RefUnwindSafe for ExifEntryRef<'a>

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impl<'a> Send for ExifEntryRef<'a>

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impl<'a> Sync for ExifEntryRef<'a>

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impl<'a> Unpin for ExifEntryRef<'a>

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impl<'a> UnsafeUnpin for ExifEntryRef<'a>

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impl<'a> UnwindSafe for ExifEntryRef<'a>

Blanket Implementations§

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = !

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

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<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