Qiskit / qiskit / 10838195456

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main: 89%

Build Type

push

github

Committed by web-flow

Commit Message

Move `Option<Box<_>>` into `ExtraInstructionAttributes`. (#13127)

* Move Option<Box<_>> into ExtraInstructionAttributes.

Previously, CircuitInstruction and PackedInstruction held
the ExtraInstructionAttributes struct within an Option<Box<_>>.
By putting the Option<Box<_>> inside ExtraInstructionAttributes,
we can use the struct itself to manage its memory and provide
access to the attributes behind a nicer interface.

The size of ExtraInstructionAttributes should be the same size
as the old Option<Box<ExtraInstructionAttributes>>, so this
should not have memory implications.

* Address review comments.

- Use tuple struct.
- Use 'Attributes' over 'Attrs'.
- Add doc comment for internal 'ExtraAttributes' struct.
- Add doc comments for methods.
- Add setters for unit and duration.

* Fix performance regression from unnecessary dict creation.

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13 existing lines in 5 files now uncovered.

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