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Measurement

cqlib_core::circuit::classical

Struct Measurement 

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pub struct Measurement { /* private fields */ }
Expand description

Self-contained handle returned by circuit measurement builders.

ClassicalValue is the IR value used by expressions and control-flow. Measurement adds the measured qubits and their bit order, so state-level sampling APIs can consume a measurement without searching the circuit IR.

Bit order follows the measure_bits input order: qubits()[0] is bit index 0, the least-significant bit in packed results.

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impl Measurement

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pub fn new(value: ClassicalValue, qubits: SmallVec<[Qubit; 3]>) -> Self

Creates a measurement handle from its IR value and measured qubits.

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pub fn value(&self) -> ClassicalValue

Returns the immutable circuit value produced by this measurement.

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pub fn expr(&self) -> ClassicalExpr

Creates an expression that reads this measurement’s immutable value.

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pub fn qubits(&self) -> &[Qubit]

Returns the measured qubits in result bit order.

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pub fn width(&self) -> usize

Returns the number of measured bits.

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pub fn ty(&self) -> ClassicalType

Returns the static type of the measurement result.

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pub fn check_qubits(&self, num_qubits: usize) -> Result<(), QisError>

Checks that all measured qubits are valid for a state with num_qubits.

Returns QisError::IndexOutOfBounds for the first qubit index outside 0..num_qubits.

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pub fn project(&self, full: &Outcome) -> Outcome

Projects a full-register outcome onto this measurement’s qubit order.

If qubits()[i] is one in full, bit i is set in the returned Outcome.

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pub fn project_basis(&self, basis: usize) -> Outcome

Projects a computational-basis index onto this measurement’s qubit order.

If bit qubits()[i] is one in basis, bit i is set in the returned Outcome.

Trait Implementations§

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impl Clone for Measurement

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fn clone(&self) -> Self

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 Measurement

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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 Measurement

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impl PartialEq for Measurement

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

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impl<T> Any for T
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Gets the TypeId of self. 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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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

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