LoadConst

class hugr.ops.LoadConst(_typ: Type | None = None, num_out: int = 1)

Bases: DataflowOp

Load a constant value into a dataflow graph. Connects to a Const.

Methods

name	Name of the operation.
outer_signature	The external signature of this operation.
port_kind	Get the kind of the given port.
port_type	Get the type of the given dataflow port from the signature of the operation.
used_extensions	Get the extensions used by this operation, optionally resolving unresolved types and operations.

Attributes

num_out
type_	The type of the loaded value.

name() → str

Name of the operation.

outer_signature() → FunctionType

The external signature of this operation. Defines the valid external connectivity of the node the operation belongs to.

Raises:

IncompleteOp – If the operation’s inputs and outputs have not been set.

port_kind(port: InPort | OutPort) → ValueKind | ConstKind | FunctionKind | CFKind | OrderKind

Get the kind of the given port.

Example

>>> op = Const(val.TRUE)
>>> op.port_kind(OutPort(Node(0), 0))
ConstKind(Bool)

port_type(port: InPort | OutPort) → Type

Get the type of the given dataflow port from the signature of the operation.

Example

>>> op = Input([tys.Bool])
>>> op.port_type(OutPort(Node(0), 0))
Bool

property type_: Type

The type of the loaded value.

Raises:

IncompleteOp – If the type has not been set.

used_extensions(resolve_from: ExtensionRegistry | None = None) → ExtensionResolutionResult

Get the extensions used by this operation, optionally resolving unresolved types and operations.

Parameters:

resolve_from – Optional extension registry to resolve against. If None, opaque types and Custom ops will not be resolved.

Returns:

The result containing used and unresolved extensions.