Support export/import multiple conditions in QASM 3.0 #7638
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Extends Cirq’s QASM support to handle multiple conditions (e.g. `if (a==1 && b==3)`) in both parsing and exporting. This enables semantics-preserving round-trip conversion of QASM programs that use register-wise comparisons as conditions. Still, circuits with multiple conditions cannot be exported back to QASM 2.0. Changes: - Import - updated parser's grammar to allow a condition_list separated by `&&`. - Export - added support for emitting multiple conditions with explicit && in QASM 3.0. - QASM 2.0 export still raises ValueError Fixes: quantumlib#7624
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #7638 +/- ##
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Coverage 99.56% 99.56%
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Files 1088 1088
Lines 96048 96069 +21
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+ Hits 95632 95653 +21
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pavoljuhas
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Sep 8, 2025
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Extends Cirq’s QASM 3.0 support to handle multiple conditions (e.g.
if (a==1 && b==3)) in both parsing and exporting. This enables semantics-preserving round-trip conversion of QASM programs that use register-wise comparisons as conditions.Still, circuits with multiple conditions cannot be exported back to QASM 2.0.
Changes:
&&.Fixes: #7624