Revision history for stim-parser

0.2.0.0 -- 2026-04-01

• Add DEM (Detector Error Model) parsing support. New modules: StimParser.DEM.Expr, StimParser.DEM.Parse.
• Add flattenDEM utility to expand repeat blocks and apply shift_detectors coordinate/ID shifts.
• Migrate all floating-point types from Float to Double for higher precision probability representation.
• Move parseExhaust, parseTuple, and parseTupleFloat to StimParser.ParseUtils as shared lexer utilities.
• Add parseNumber for parsing bare integers or floats as Double.
• Expand test suite with DEM parser and flattening tests.

0.1.0.0 -- 2026-03-31

• Initial release.
• Parse STIM quantum circuit files into a Haskell AST.
• Supported circuit elements:
  • Gates (Pauli, single-qubit Clifford, two-qubit Clifford, collapsing gates)
  • Measurements (M, MXX, MYY, MZZ, MRX, MRY, MRZ, MX, MY, MZ, MR)
  • Generalized Pauli Product gates (MPP, SPP, SPP_DAG)
  • Noise channels (DEPOLARIZE, PAULI_CHANNEL, X/Y/Z_ERROR, CORRELATED_ERROR, etc.)
  • Annotations (DETECTOR, OBSERVABLE_INCLUDE, QUBIT_COORDS, SHIFT_COORDS, TICK, MPAD)
  • REPEAT blocks
  • Tags on instructions
• StimParser.Trans.flattenQ transform to resolve rec[] references into absolute qubit indices, with coordinate shift support.
• Two example executables: stim-parser-example, stim-parser-unit-example.
• Test suite covering expression types, parsers, parse utilities, and transformations.