# Features in maplibre::render::settings - Rust
Features that are not guaranteed to be supported.
Keywords: rust, rustlang, rust-lang, Features

# Struct maplibre::render::settings::Features

[−]

    #[repr(transparent)]pub struct Features {
        pub(crate) bits: u64,
    }

Expand description

Features that are not guaranteed to be supported.

These are either part of the webgpu standard, or are extension features supported by wgpu when targeting native.

If you want to use a feature, you need to first verify that the adapter supports the feature. If the adapter does not support the feature, requesting a device with it enabled will panic.

Corresponds to WebGPU `GPUFeatureName`.

## Fields

`bits: u64`

## Implementations

### impl Features

#### pub const fn all_webgpu_mask() -> Features

Mask of all features which are part of the upstream WebGPU standard.

#### pub const fn all_native_mask() -> Features

Mask of all features that are only available when targeting native (not web).

### impl Features

#### pub const DEPTH_CLIP_CONTROL: Features

By default, polygon depth is clipped to 0-1 range before/during rasterization. Anything outside of that range is rejected, and respective fragments are not touched.

With this extension, we can disabling clipping. That allows shadow map occluders to be rendered into a tighter depth range.

Supported platforms:

- desktops
- some mobile chips

This is a web and native feature.

#### pub const DEPTH24UNORM_STENCIL8: Features

Allows for explicit creation of textures of format `TextureFormat::Depth24UnormStencil8`

Supported platforms:

- Vulkan (some)
- DX12
- Metal (Macs with amd GPUs)

This is a web and native feature.

#### pub const DEPTH32FLOAT_STENCIL8: Features

Allows for explicit creation of textures of format `TextureFormat::Depth32FloatStencil8`

Supported platforms:

- Vulkan (mostly)
- DX12
- Metal

This is a web and native feature.

#### pub const TEXTURE_COMPRESSION_BC: Features

Enables BCn family of compressed textures. All BCn textures use 4x4 pixel blocks with 8 or 16 bytes per block.

Compressed textures sacrifice some quality in exchange for significantly reduced bandwidth usage.

Support for this feature guarantees availability of [`TextureUsages::COPY_SRC | TextureUsages::COPY_DST | TextureUsages::TEXTURE_BINDING`] for BCn formats. `Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES` may enable additional usages.

Supported Platforms:

- desktops

This is a web and native feature.

#### pub const TEXTURE_COMPRESSION_ETC2: Features

Enables ETC family of compressed textures. All ETC textures use 4x4 pixel blocks. ETC2 RGB and RGBA1 are 8 bytes per block. RTC2 RGBA8 and EAC are 16 bytes per block.

Compressed textures sacrifice some quality in exchange for significantly reduced bandwidth usage.

Support for this feature guarantees availability of [`TextureUsages::COPY_SRC | TextureUsages::COPY_DST | TextureUsages::TEXTURE_BINDING`] for ETC2 formats. `Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES` may enable additional usages.

Supported Platforms:

- Intel/Vulkan
- Mobile (some)

This is a web and native feature.

#### pub const TEXTURE_COMPRESSION_ASTC_LDR: Features

Enables ASTC family of compressed textures. ASTC textures use pixel blocks varying from 4x4 to 12x12. Blocks are always 16 bytes.

Compressed textures sacrifice some quality in exchange for significantly reduced bandwidth usage.

Support for this feature guarantees availability of [`TextureUsages::COPY_SRC | TextureUsages::COPY_DST | TextureUsages::TEXTURE_BINDING`] for ASTC formats. `Features::TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES` may enable additional usages.

Supported Platforms:

- Intel/Vulkan
- Mobile (some)

This is a web and native feature.

#### pub const INDIRECT_FIRST_INSTANCE: Features

Allows non-zero value for the “first instance” in indirect draw calls.

Supported Platforms:

- Vulkan (mostly)
- DX12
- Metal

This is a web and native feature.

#### pub const TIMESTAMP_QUERY: Features

Enables use of Timestamp Queries. These queries tell the current gpu timestamp when all work before the query is finished. Call [`CommandEncoder::write_timestamp`], [`RenderPassEncoder::write_timestamp`], or [`ComputePassEncoder::write_timestamp`] to write out a timestamp.

They must be resolved using [`CommandEncoder::resolve_query_sets`] into a buffer, then the result must be multiplied by the timestamp period [`Queue::get_timestamp_period`] to get the timestamp in nanoseconds. Multiple timestamps can then be diffed to get the time for operations between them to finish.

Due to wgpu-hal limitations, this is only supported on vulkan for now.

Supported Platforms:

- Vulkan (works)
- DX12 (works)

This is a web and native feature.

#### pub const PIPELINE_STATISTICS_QUERY: Features

Enables use of Pipeline Statistics Queries. These queries tell the count of various operations performed between the start and stop call. Call [`RenderPassEncoder::begin_pipeline_statistics_query`] to start a query, then call [`RenderPassEncoder::end_pipeline_statistics_query`] to stop one.

They must be resolved using [`CommandEncoder::resolve_query_sets`] into a buffer. The rules on how these resolve into buffers are detailed in the documentation for [`PipelineStatisticsTypes`].

Due to wgpu-hal limitations, this is only supported on vulkan for now.

Supported Platforms:

- Vulkan (works)
- DX12 (works)

This is a web and native feature.

#### pub const SHADER_FLOAT16: Features

Allows shaders to acquire the FP16 ability

Note: this is not supported in naga yet，only through spir-v passthrough right now.

Supported Platforms:

- Vulkan
- Metal

This is a web and native feature.

#### pub const MAPPABLE_PRIMARY_BUFFERS: Features

Webgpu only allows the MAP_READ and MAP_WRITE buffer usage to be matched with COPY_DST and COPY_SRC respectively. This removes this requirement.

This is only beneficial on systems that share memory between CPU and GPU. If enabled on a system that doesn’t, this can severely hinder performance. Only use if you understand the consequences.

Supported platforms:

- All

This is a native only feature.

#### pub const TEXTURE_BINDING_ARRAY: Features

Allows the user to create uniform arrays of textures in shaders:

eg. `uniform texture2D textures[10]`.

If `Features::STORAGE_RESOURCE_BINDING_ARRAY` is supported as well as this, the user may also create uniform arrays of storage textures.

eg. `uniform image2D textures[10]`.

This capability allows them to exist and to be indexed by dynamically uniform values.

Supported platforms:

- DX12
- Metal (with MSL 2.0+ on macOS 10.13+)
- Vulkan

This is a native only feature.

#### pub const BUFFER_BINDING_ARRAY: Features

Allows the user to create arrays of buffers in shaders:

eg. `uniform myBuffer { .... } buffer_array[10]`.

This capability allows them to exist and to be indexed by dynamically uniform values.

If `Features::STORAGE_RESOURCE_BINDING_ARRAY` is supported as well as this, the user may also create arrays of storage buffers.

eg. `buffer myBuffer { ... } buffer_array[10]`

Supported platforms:

- DX12
- Vulkan

This is a native only feature.

#### pub const STORAGE_RESOURCE_BINDING_ARRAY: Features

Allows the user to create uniform arrays of storage buffers or textures in shaders, if resp. `Features::BUFFER_BINDING_ARRAY` or `Features::TEXTURE_BINDING_ARRAY` is supported.

This capability allows them to exist and to be indexed by dynamically uniform values.

Supported platforms:

- Metal (with MSL 2.2+ on macOS 10.13+)
- Vulkan

This is a native only feature.

#### pub const SAMPLED_TEXTURE_AND_STORAGE_BUFFER_ARRAY_NON_UNIFORM_INDEXING: Features

Allows shaders to index sampled texture and storage buffer resource arrays with dynamically non-uniform values:

eg. `texture_array[vertex_data]`

In order to use this capability, the corresponding GLSL extension must be enabled like so:

`#extension GL_EXT_nonuniform_qualifier : require`

and then used either as `nonuniformEXT` qualifier in variable declaration:

eg. `layout(location = 0) nonuniformEXT flat in int vertex_data;`

or as `nonuniformEXT` constructor:

eg. `texture_array[nonuniformEXT(vertex_data)]`

HLSL does not need any extension.

Supported platforms:

- DX12
- Metal (with MSL 2.0+ on macOS 10.13+)
- Vulkan 1.2+ (or VK_EXT_descriptor_indexing)’s shaderSampledImageArrayNonUniformIndexing & shaderStorageBufferArrayNonUniformIndexing feature)

This is a native only feature.

#### pub const UNIFORM_BUFFER_AND_STORAGE_TEXTURE_ARRAY_NON_UNIFORM_INDEXING: Features

Allows shaders to index uniform buffer and storage texture resource arrays with dynamically non-uniform values:

eg. `texture_array[vertex_data]`

In order to use this capability, the corresponding GLSL extension must be enabled like so:

`#extension GL_EXT_nonuniform_qualifier : require`

and then used either as `nonuniformEXT` qualifier in variable declaration:

eg. `layout(location = 0) nonuniformEXT flat in int vertex_data;`

or as `nonuniformEXT` constructor:

eg. `texture_array[nonuniformEXT(vertex_data)]`

HLSL does not need any extension.

Supported platforms:

- DX12
- Metal (with MSL 2.0+ on macOS 10.13+)
- Vulkan 1.2+ (or VK_EXT_descriptor_indexing)’s shaderUniformBufferArrayNonUniformIndexing & shaderStorageTextureArrayNonUniformIndexing feature)

This is a native only feature.

#### pub const PARTIALLY_BOUND_BINDING_ARRAY: Features

Allows the user to create bind groups continaing arrays with less bindings than the BindGroupLayout.

This is a native only feature.

#### pub const MULTI_DRAW_INDIRECT: Features

Allows the user to call [`RenderPass::multi_draw_indirect`] and [`RenderPass::multi_draw_indexed_indirect`].

Allows multiple indirect calls to be dispatched from a single buffer.

Supported platforms:

- DX12
- Vulkan

This is a native only feature.

#### pub const MULTI_DRAW_INDIRECT_COUNT: Features

Allows the user to call [`RenderPass::multi_draw_indirect_count`] and [`RenderPass::multi_draw_indexed_indirect_count`].

This allows the use of a buffer containing the actual number of draw calls.

Supported platforms:

- DX12
- Vulkan 1.2+ (or VK_KHR_draw_indirect_count)

This is a native only feature.

#### pub const PUSH_CONSTANTS: Features

Allows the use of push constants: small, fast bits of memory that can be updated inside a [`RenderPass`].

Allows the user to call [`RenderPass::set_push_constants`], provide a non-empty array to [`PipelineLayoutDescriptor`], and provide a non-zero limit to `Limits::max_push_constant_size`.

A block of push constants can be declared with `layout(push_constant) uniform Name {..}` in shaders.

Supported platforms:

- DX12
- Vulkan
- Metal
- DX11 (emulated with uniforms)
- OpenGL (emulated with uniforms)

This is a native only feature.

#### pub const ADDRESS_MODE_CLAMP_TO_BORDER: Features

Allows the use of [`AddressMode::ClampToBorder`] with a border color other than [`SamplerBorderColor::Zero`].

Supported platforms:

- DX12
- Vulkan
- Metal (macOS 10.12+ only)
- DX11
- OpenGL

This is a web and native feature.

#### pub const POLYGON_MODE_LINE: Features

Allows the user to set [`PolygonMode::Line`] in [`PrimitiveState::polygon_mode`]

This allows drawing polygons/triangles as lines (wireframe) instead of filled

Supported platforms:

- DX12
- Vulkan
- Metal

This is a native only feature.

#### pub const POLYGON_MODE_POINT: Features

Allows the user to set [`PolygonMode::Point`] in [`PrimitiveState::polygon_mode`]

This allows only drawing the vertices of polygons/triangles instead of filled

Supported platforms:

- DX12
- Vulkan

This is a native only feature.

#### pub const TEXTURE_ADAPTER_SPECIFIC_FORMAT_FEATURES: Features

Enables device specific texture format features.

See `TextureFormatFeatures` for a listing of the features in question.

By default only texture format properties as defined by the WebGPU specification are allowed. Enabling this feature flag extends the features of each format to the ones supported by the current device. Note that without this flag, read/write storage access is not allowed at all.

This extension does not enable additional formats.

This is a native-only feature.

#### pub const SHADER_FLOAT64: Features

Enables 64-bit floating point types in SPIR-V shaders.

Note: even when supported by GPU hardware, 64-bit floating point operations are frequently between 16 and 64 times slower than equivalent operations on 32-bit floats.

Supported Platforms:

- Vulkan

This is a native-only feature.

#### pub const VERTEX_ATTRIBUTE_64BIT: Features

Enables using 64-bit types for vertex attributes.

Requires SHADER_FLOAT64.

Supported Platforms: N/A

This is a native-only feature.

#### pub const CONSERVATIVE_RASTERIZATION: Features

Allows the user to set a overestimation-conservative-rasterization in [`PrimitiveState::conservative`]

Processing of degenerate triangles/lines is hardware specific. Only triangles are supported.

Supported platforms:

- Vulkan

This is a native only feature.

#### pub const VERTEX_WRITABLE_STORAGE: Features

Enables bindings of writable storage buffers and textures visible to vertex shaders.

Note: some (tiled-based) platforms do not support vertex shaders with any side-effects.

Supported Platforms:

- All

This is a native-only feature.

#### pub const CLEAR_TEXTURE: Features

Enables clear to zero for textures.

Supported platforms:

- All

This is a native only feature.

#### pub const SPIRV_SHADER_PASSTHROUGH: Features

Enables creating shader modules from SPIR-V binary data (unsafe).

SPIR-V data is not parsed or interpreted in any way; you can use [`wgpu::make_spirv_raw!`] to check for alignment and magic number when converting from raw bytes.

Supported platforms:

- Vulkan, in case shader’s requested capabilities and extensions agree with Vulkan implementation.

This is a native only feature.

#### pub const SHADER_PRIMITIVE_INDEX: Features

Enables `builtin(primitive_index)` in fragment shaders.

Note: enables geometry processing for pipelines using the builtin. This may come with a significant performance impact on some hardware. Other pipelines are not affected.

Supported platforms:

- Vulkan

This is a native only feature.

#### pub const MULTIVIEW: Features

Enables multiview render passes and `builtin(view_index)` in vertex shaders.

Supported platforms:

- Vulkan

This is a native only feature.

#### pub const TEXTURE_FORMAT_16BIT_NORM: Features

Enables normalized `16-bit` texture formats.

Supported platforms:

- Vulkan
- DX12
- Metal

This is a native only feature.

#### pub const ADDRESS_MODE_CLAMP_TO_ZERO: Features

Allows the use of [`AddressMode::ClampToBorder`] with a border color of [`SamplerBorderColor::Zero`].

Supported platforms:

- DX12
- Vulkan
- Metal
- DX11
- OpenGL

This is a native only feature.

#### pub const TEXTURE_COMPRESSION_ASTC_HDR: Features

Supported Platforms:

- Metal

This is a native-only feature.

#### pub const fn empty() -> Features

Returns an empty set of flags.

#### pub const fn all() -> Features

Returns the set containing all flags.

#### pub const fn bits(&self) -> u64

Returns the raw value of the flags currently stored.

#### pub const fn from_bits(bits: u64) -> Option<Features>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

#### pub const fn from_bits_truncate(bits: u64) -> Features

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

#### pub const unsafe fn from_bits_unchecked(bits: u64) -> Features

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

##### Safety

The caller of the `bitflags!` macro can chose to allow or disallow extra bits for their bitflags type.

The caller of `from_bits_unchecked()` has to ensure that all bits correspond to a defined flag or that extra bits are valid for this bitflags type.

#### pub const fn is_empty(&self) -> bool

Returns `true` if no flags are currently stored.

#### pub const fn is_all(&self) -> bool

Returns `true` if all flags are currently set.

#### pub const fn intersects(&self, other: Features) -> bool

Returns `true` if there are flags common to both `self` and `other`.

#### pub const fn contains(&self, other: Features) -> bool

Returns `true` if all of the flags in `other` are contained within `self`.

#### pub fn insert(&mut self, other: Features)

Inserts the specified flags in-place.

#### pub fn remove(&mut self, other: Features)

Removes the specified flags in-place.

#### pub fn toggle(&mut self, other: Features)

Toggles the specified flags in-place.

#### pub fn set(&mut self, other: Features, value: bool)

Inserts or removes the specified flags depending on the passed value.

#### pub const fn intersection(self, other: Features) -> Features

Returns the intersection between the flags in `self` and `other`.

Specifically, the returned set contains only the flags which are present in both `self` and `other`.

This is equivalent to using the `&` operator (e.g. `ops::BitAnd`), as in `flags & other`.

#### pub const fn union(self, other: Features) -> Features

Returns the union of between the flags in `self` and `other`.

Specifically, the returned set contains all flags which are present in either `self` or `other`, including any which are present in both (see `Self::symmetric_difference` if that is undesirable).

This is equivalent to using the `|` operator (e.g. `ops::BitOr`), as in `flags | other`.

#### pub const fn difference(self, other: Features) -> Features

Returns the difference between the flags in `self` and `other`.

Specifically, the returned set contains all flags present in `self`, except for the ones present in `other`.

It is also conceptually equivalent to the “bit-clear” operation: `flags & !other` (and this syntax is also supported).

This is equivalent to using the `-` operator (e.g. `ops::Sub`), as in `flags - other`.

#### pub const fn symmetric_difference(self, other: Features) -> Features

Returns the symmetric difference between the flags in `self` and `other`.

Specifically, the returned set contains the flags present which are present in `self` or `other`, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets `self` and `other`.

This is equivalent to using the `^` operator (e.g. `ops::BitXor`), as in `flags ^ other`.

#### pub const fn complement(self) -> Features

Returns the complement of this set of flags.

Specifically, the returned set contains all the flags which are not set in `self`, but which are allowed for this type.

Alternatively, it can be thought of as the set difference between `Self::all()` and `self` (e.g. `Self::all() - self`)

This is equivalent to using the `!` operator (e.g. `ops::Not`), as in `!flags`.

## Trait Implementations

### impl Binary for Features

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

Formats the value using the given formatter.

### impl BitAnd<Features> for Features

#### pub fn bitand(self, other: Features) -> Features

Returns the intersection between the two sets of flags.

#### type Output = Features

The resulting type after applying the `&` operator.

### impl BitAndAssign<Features> for Features

#### pub fn bitand_assign(&mut self, other: Features)

Disables all flags disabled in the set.

### impl BitOr<Features> for Features

#### pub fn bitor(self, other: Features) -> Features

Returns the union of the two sets of flags.

#### type Output = Features

The resulting type after applying the `|` operator.

### impl BitOrAssign<Features> for Features

#### pub fn bitor_assign(&mut self, other: Features)

Adds the set of flags.

### impl BitXor<Features> for Features

#### pub fn bitxor(self, other: Features) -> Features

Returns the left flags, but with all the right flags toggled.

#### type Output = Features

The resulting type after applying the `^` operator.

### impl BitXorAssign<Features> for Features

#### pub fn bitxor_assign(&mut self, other: Features)

Toggles the set of flags.

### impl Clone for Features

#### pub fn clone(&self) -> Features

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from `source`. Read more

### impl Debug for Features

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

Formats the value using the given formatter. Read more

### impl Default for Features

#### pub fn default() -> Features

Returns the “default value” for a type. Read more

### impl Extend<Features> for Features

#### pub fn extend<T>(&mut self, iterator: T) where
T: IntoIterator<Item = Features>,

Extends a collection with the contents of an iterator. Read more

source

#### fn extend_one(&mut self, item: A)

🔬 This is a nightly-only experimental API. (`extend_one`)

Extends a collection with exactly one element.

source

#### fn extend_reserve(&mut self, additional: usize)

🔬 This is a nightly-only experimental API. (`extend_one`)

Reserves capacity in a collection for the given number of additional elements. Read more

### impl FromIterator<Features> for Features

#### pub fn from_iter<T>(iterator: T) -> Features where
T: IntoIterator<Item = Features>,

Creates a value from an iterator. Read more

### impl Hash for Features

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

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,

Feeds a slice of this type into the given `Hasher`. Read more

### impl LowerHex for Features

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

Formats the value using the given formatter.

### impl Not for Features

#### pub fn not(self) -> Features

Returns the complement of this set of flags.

#### type Output = Features

The resulting type after applying the `!` operator.

### impl Octal for Features

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

Formats the value using the given formatter.

### impl Ord for Features

#### pub fn cmp(&self, other: &Features) -> Ordering

This method returns an `Ordering` between `self` and `other`. Read more

1.21.0 · source

#### fn max(self, other: Self) -> Self

Compares and returns the maximum of two values. Read more

1.21.0 · source

#### fn min(self, other: Self) -> Self

Compares and returns the minimum of two values. Read more

1.50.0 · source

#### fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval. Read more

### impl PartialEq<Features> for Features

#### pub fn eq(&self, other: &Features) -> bool

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### pub fn ne(&self, other: &Features) -> bool

This method tests for `!=`.

### impl PartialOrd<Features> for Features

#### pub fn partial_cmp(&self, other: &Features) -> Option<Ordering>

This method returns an ordering between `self` and `other` values if one exists. Read more

1.0.0 · source

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

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

1.0.0 · source

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

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

1.0.0 · source

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

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

1.0.0 · source

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

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### impl Sub<Features> for Features

#### pub fn sub(self, other: Features) -> Features

Returns the set difference of the two sets of flags.

#### type Output = Features

The resulting type after applying the `-` operator.

### impl SubAssign<Features> for Features

#### pub fn sub_assign(&mut self, other: Features)

Disables all flags enabled in the set.

### impl UpperHex for Features

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

Formats the value using the given formatter.

### impl Copy for Features

### impl Eq for Features

### impl StructuralEq for Features

### impl StructuralPartialEq for Features

## Auto Trait Implementations

### impl RefUnwindSafe for Features

### impl Send for Features

### impl Sync for Features

### impl Unpin for Features

### impl UnwindSafe for Features

## Blanket Implementations

source

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

source

#### pub fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more

source

### impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

#### pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

source

### impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

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

Mutably borrows from an owned value. Read more

### impl<T> CallHasher for T where
T: Hash + ?Sized,

#### pub fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64 where
H: Hash + ?Sized,
B: BuildHasher,

### impl<T> Downcast for T where
T: Any,

#### pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert `Box<dyn Trait>` (where `Trait: Downcast`) to `Box<dyn Any>`. `Box<dyn Any>` can then be further `downcast` into `Box<ConcreteType>` where `ConcreteType` implements `Trait`. Read more

#### pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert `Rc<Trait>` (where `Trait: Downcast`) to `Rc<Any>`. `Rc<Any>` can then be further `downcast` into `Rc<ConcreteType>` where `ConcreteType` implements `Trait`. Read more

#### pub fn as_any(&self) -> &(dyn Any + 'static)

Convert `&Trait` (where `Trait: Downcast`) to `&Any`. This is needed since Rust cannot generate `&Any`’s vtable from `&Trait`’s. Read more

#### pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert `&mut Trait` (where `Trait: Downcast`) to `&Any`. This is needed since Rust cannot generate `&mut Any`’s vtable from `&mut Trait`’s. Read more

### impl<T> Downcast<T> for T

#### pub fn downcast(&self) -> &T

### impl<T> DowncastSync for T where
T: Any + Send + Sync,

#### pub fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync + 'static>

Convert `Arc<Trait>` (where `Trait: Downcast`) to `Arc<Any>`. `Arc<Any>` can then be further `downcast` into `Arc<ConcreteType>` where `ConcreteType` implements `Trait`. Read more

source

### impl<T> DynEq for T where
T: Any + Eq,

source

#### fn as_any(&self) -> &dyn Any

source

#### fn dyn_eq(&self, other: &dyn DynEq) -> bool

source

### impl<T> DynHash for T where
T: DynEq + Hash,

source

#### fn as_dyn_eq(&self) -> &dyn DynEq

source

#### fn dyn_hash(&self, state: &mut dyn Hasher)

source

### impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,

source

#### pub fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.

source

### impl<T> From<T> for T

const: unstable · source

#### pub fn from(t: T) -> T

Returns the argument unchanged.

source

### impl<T> Instrument for T

source

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

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more

source

#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more

source

### impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

#### pub fn into(self) -> U

Calls `U::from(self)`.

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

source

### impl<T> Same<T> for T

#### type Output = T

Should always be `Self`

source

### impl<T> ToOwned for T where
T: Clone,

#### type Owned = T

The resulting type after obtaining ownership.

source

#### pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

source

#### pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (`toowned_clone_into`)

Uses borrowed data to replace owned data, usually by cloning. Read more

source

### impl<T, U> TryFrom<U> for T where
U: Into<T>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

source

### impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

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

The type returned in the event of a conversion error.

const: unstable · source

#### pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

### impl<T> Upcast<T> for T

#### pub fn upcast(&self) -> Option<&T>

source

### impl<T> WithSubscriber for T

source

#### 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

source

#### fn with_current_subscriber(self) -> WithDispatch<Self>

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