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stim parser should merge gates across lines #291
Description
Stim's Circuit parser merges consecutive lines into one instruction when gate name, arguments, and tag all match. stim_parser::parse keeps one instruction per source line.
| Source | Stim | stim-parser |
|---|---|---|
H 0 / H 1 |
H 0 1 |
2 instructions |
CX 0 1 / CX 2 3 |
CX 0 1 2 3 |
2 instructions |
M 0 / M 1 |
M 0 1 |
2 instructions |
X_ERROR(0.1) 0 / X_ERROR(0.1) 1 |
X_ERROR(0.1) 0 1 |
2 instructions |
H[tag] 0 / H[tag] 1 |
H[tag] 0 1 |
2 instructions |
H 0 / H 0 |
H 0 0 |
2 instructions |
Stim does not fuse when:
- args differ (
X_ERROR(0.1) 0/X_ERROR(0.2) 1) - tags differ (
H[a] 0/H[b] 1) - any other instruction sits between the lines, including
TICK
It also does not deduplicate targets (H 0 0 above).
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