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AssetPath

Enum AssetPath 

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pub enum AssetPath {
    Embedded(&'static str),
    Fatfs(String),
    Sim(String),
    Memory(String),
}
Available on crate feature fs only.
Expand description

A typed value naming an asset within a specific source kind.

This is the LPAR-09 analog of LVGL’s drive-letter prefix (A:path, S:path). Instead of a runtime string prefix, the enum variant encodes the source kind at the Rust type level: there is no string to parse and no possibility of silently routing a path to the wrong source.

§Source-kind set

The source-kind set is frozen (Standards Action per LPAR-09 §9). Adding a new variant requires a §15 amendment to LPAR-09.

§Path string format

Within each source kind paths are /-separated UTF-8 with no required leading /, consistent with AssetSource::open’s "fonts/regular.bin" convention.

Variants§

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Embedded(&'static str)

A static asset linked into the binary via include_bytes!.

The &'static str is the symbol name used to look up the byte slice in the EmbeddedAssetSource table. Lookup is infallible if the symbol exists; otherwise AssetError::Fs(FsError::NoSuchFile) is returned.

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Fatfs(String)

An asset on a FAT volume reached through a BlockDevice.

Available behind the fatfs feature in no_std + alloc builds. The String is the file path within the FAT volume (leading / stripped before passing to the FAT driver).

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Sim(String)

An asset on the host filesystem (simulator builds only).

Only available when the sim feature is enabled and the target is not target_os = "none". The String is a relative or absolute host path.

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Memory(String)

An asset in a runtime-populated in-RAM table.

Useful for test asset injection and for content pre-loaded from FATFS or another source before the widget tree starts. no_std + alloc.

Implementations§

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impl AssetPath

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pub fn path_str(&self) -> &str

Return the path string within this source kind.

For AssetPath::Embedded this is the symbol name. For all others it is the runtime path string.

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pub fn source_kind(&self) -> &'static str

Return a string label identifying the source kind (for diagnostics).

Trait Implementations§

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impl Clone for AssetPath

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fn clone(&self) -> AssetPath

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 Debug for AssetPath

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

Formats the value using the given formatter. Read more
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impl Eq for AssetPath

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impl Hash for AssetPath

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for AssetPath

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fn eq(&self, other: &AssetPath) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for AssetPath

Auto Trait Implementations§

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> Az for T

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fn az<Dst>(self) -> Dst
where T: Cast<Dst>,

Casts the value.
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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<Src, Dst> CastFrom<Src> for Dst
where Src: Cast<Dst>,

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fn cast_from(src: Src) -> Dst

Casts the value.
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impl<T> CheckedAs for T

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fn checked_as<Dst>(self) -> Option<Dst>
where T: CheckedCast<Dst>,

Casts the value.
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impl<Src, Dst> CheckedCastFrom<Src> for Dst
where Src: CheckedCast<Dst>,

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fn checked_cast_from(src: Src) -> Option<Dst>

Casts the value.
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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, 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> OverflowingAs for T

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fn overflowing_as<Dst>(self) -> (Dst, bool)
where T: OverflowingCast<Dst>,

Casts the value.
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impl<Src, Dst> OverflowingCastFrom<Src> for Dst
where Src: OverflowingCast<Dst>,

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fn overflowing_cast_from(src: Src) -> (Dst, bool)

Casts the value.
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impl<T> SaturatingAs for T

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fn saturating_as<Dst>(self) -> Dst
where T: SaturatingCast<Dst>,

Casts the value.
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impl<Src, Dst> SaturatingCastFrom<Src> for Dst
where Src: SaturatingCast<Dst>,

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fn saturating_cast_from(src: Src) -> Dst

Casts the value.
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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 = 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<T> UnwrappedAs for T

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fn unwrapped_as<Dst>(self) -> Dst
where T: UnwrappedCast<Dst>,

Casts the value.
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impl<Src, Dst> UnwrappedCastFrom<Src> for Dst
where Src: UnwrappedCast<Dst>,

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fn unwrapped_cast_from(src: Src) -> Dst

Casts the value.
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impl<T> WrappingAs for T

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fn wrapping_as<Dst>(self) -> Dst
where T: WrappingCast<Dst>,

Casts the value.
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impl<Src, Dst> WrappingCastFrom<Src> for Dst
where Src: WrappingCast<Dst>,

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fn wrapping_cast_from(src: Src) -> Dst

Casts the value.