xanaduai / xir Goto Github PK

Expected behavior

When calling program.wires on programs containing control gates, the control wire is missing.

As an example consider the following XIR script:

xir_script = """
gate _gate_1_[0, 1]:
    CRX(0.4) | [0, 1];
end;

ctrl[0] _gate_1_ | [1, 2];
"""

We would the expect the following

>>> import xir
>>> program = xir.parse_script(xir_script)
>>> program.wires
{0, 1, 2}

Actual behavior

The actual output is:

>>> import xir
>>> program = xir.parse_script(xir_script)
>>> program.wires
{1, 2}

i.e the control wire is not accounted for

Additional information

This impacts the way wire options are passed to scripts for PennyLane tapes that contain control gates: https://github.com/XanaduAI/pennylane-xanadu-cloud/pull/4

Source code

import xir

xir_script = """
gate _gate_1_[0, 1]:
    CRX(0.4) | [0, 1];
end;

ctrl[0] _gate_1_ | [1, 2];
"""

program = xir.parse_script(xir_script)
print(program.wires)

Tracebacks

No response

• I have searched existing GitHub issues to make sure the issue does not already exist.

Feature details

Hi there,

while I was working on a Spack recipe for StrawberryFields, I have noticed one small issue about the XIR repo:
the tarball from pypi does not contain requirements.txt, hence the build fails; I resorted to using the github tarball for now.

For reference my Spack PR: spack/spack#34849

Implementation

No response

How important would you say this feature is?

1: Not important. Would be nice to have.

Additional information

No response