Struct Extension

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pub struct Extension {
    pub version: Version,
    pub name: ExtensionId,
    /* private fields */
}
Expand description

A extension is a set of capabilities required to execute a graph.

These are normally defined once and shared across multiple graphs and operations wrapped in Arcs inside ExtensionRegistry.

§Example

The following example demonstrates how to define a new extension with a custom operation and a custom type.

When using arcs, the extension can only be modified at creation time. The defined operations and types keep a Weak reference to their extension. We provide a helper method Extension::new_arc to aid their definition.

Extension::new_arc(
    ExtensionId::new_unchecked("my.extension"),
    Version::new(0, 1, 0),
    |ext, extension_ref| {
        // Add a custom type definition
        ext.add_type(
            "MyType".into(),
            vec![], // No type parameters
            "Some type".into(),
            TypeDefBound::any(),
            extension_ref,
        );
        // Add a custom operation
        ext.add_op(
            "MyOp".into(),
            "Some operation".into(),
            Signature::new_endo(vec![]),
            extension_ref,
        );
    },
);

Fields§

§version: Version

Extension version, follows semver.

§name: ExtensionId

Unique identifier for the extension.

Implementations§

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impl Extension

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pub fn add_op( &mut self, name: OpName, description: String, signature_func: impl Into<SignatureFunc>, extension_ref: &Weak<Extension>, ) -> Result<&mut OpDef, ExtensionBuildError>

Add an operation definition to the extension. Must be a type scheme (defined by a PolyFuncTypeRV), a type scheme along with binary validation for type arguments (CustomValidator), or a custom binary function for computing the signature given type arguments (implementing [CustomSignatureFunc]).

This method requires a Weak reference to the Arc containing the extension being defined. The intended way to call this method is inside the closure passed to Extension::new_arc when defining the extension.

§Example
Extension::new_arc(
    ExtensionId::new_unchecked("my.extension"),
    Version::new(0, 1, 0),
    |ext, extension_ref| {
        ext.add_op(
            "MyOp".into(),
            "Some operation".into(),
            Signature::new_endo(vec![]),
            extension_ref,
        );
    },
);
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impl Extension

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pub fn add_type( &mut self, name: TypeName, params: Vec<TypeParam>, description: String, bound: TypeDefBound, extension_ref: &Weak<Extension>, ) -> Result<&TypeDef, ExtensionBuildError>

Add an exported type to the extension.

This method requires a Weak reference to the std::sync::Arc containing the extension being defined. The intended way to call this method is inside the closure passed to Extension::new_arc when defining the extension.

§Example
Extension::new_arc(
    ExtensionId::new_unchecked("my.extension"),
    Version::new(0, 1, 0),
    |ext, extension_ref| {
        ext.add_type(
            "MyType".into(),
            vec![], // No type parameters
            "Some type".into(),
            TypeDefBound::any(),
            extension_ref,
        );
    },
);
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impl Extension

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pub fn new(name: ExtensionId, version: Version) -> Self

Creates a new extension with the given name.

In most cases extensions are contained inside an Arc so that they can be shared across hugr instances and operation definitions.

See Extension::new_arc for a more ergonomic way to create boxed extensions.

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pub fn new_arc( name: ExtensionId, version: Version, init: impl FnOnce(&mut Extension, &Weak<Extension>), ) -> Arc<Self>

Creates a new extension wrapped in an Arc.

The closure lets us use a weak reference to the arc while the extension is being built. This is necessary for calling Extension::add_op and Extension::add_type.

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pub fn try_new_arc<E>( name: ExtensionId, version: Version, init: impl FnOnce(&mut Extension, &Weak<Extension>) -> Result<(), E>, ) -> Result<Arc<Self>, E>

Creates a new extension wrapped in an Arc, using a fallible initialization function.

The closure lets us use a weak reference to the arc while the extension is being built. This is necessary for calling Extension::add_op and Extension::add_type.

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pub fn get_op(&self, name: &OpNameRef) -> Option<&Arc<OpDef>>

Allows read-only access to the operations in this Extension

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pub fn get_type(&self, type_name: &TypeNameRef) -> Option<&TypeDef>

Allows read-only access to the types in this Extension

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pub fn name(&self) -> &ExtensionId

Returns the name of the extension.

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pub fn version(&self) -> &Version

Returns the version of the extension.

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pub fn operations(&self) -> impl Iterator<Item = (&OpName, &Arc<OpDef>)>

Iterator over the operations of this Extension.

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pub fn types(&self) -> impl Iterator<Item = (&TypeName, &TypeDef)>

Iterator over the types of this Extension.

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pub fn instantiate_extension_op( &self, name: &OpNameRef, args: impl Into<Vec<TypeArg>>, ) -> Result<ExtensionOp, SignatureError>

Instantiate an ExtensionOp which references an OpDef in this extension.

Trait Implementations§

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impl Clone for Extension

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fn clone(&self) -> Extension

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Extension

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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<'de> Deserialize<'de> for Extension

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for Extension

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for Extension

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more

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Gets the TypeId of self. Read more
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where T: ?Sized,

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Immutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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Causes self to use its Binary implementation when Debug-formatted.
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where Self: Display,

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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

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where Self: Octal,

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where Self: Pointer,

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where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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where Self: UpperHex,

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where &'a Self: for<'a> IntoIterator,

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