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Clifford GarwoodandClaude Opus 4.7
c2492ccc47
The physical_extruder_map translation used by IMEX per-tool PA emission was
inlined identically at two sites in GCode.cpp (tool-change and second-layer
transition). Extract to IMEXHelpers so the routing rule ("parallel mode AND
populated pem → physical index, else -1") is testable in isolation and the
call sites read as intent rather than re-deriving the conditional.
Production change is behavior-preserving:
- Same predicate (`!mode.empty() && mode != "primary"`)
- Same empty-pem short-circuit returning -1
- Same get_at() dispatch on hit
- Both call sites replaced with a single call
Four unit tests in [IMEX] cover the routing matrix:
- non-IMEX ("") and primary mode short-circuit
- parallel mode + empty pem short-circuits (defense-in-depth; get_at would
throw on empty values otherwise)
- identity pem (non-MMU IDEX) routes filament to itself
- MMU collapse routes multiple logical slots to one physical (7-slot profile
with 4-lane MMU on physical 0 and direct drives on 1/2/3)
All IMEX + Variant regression suites pass post-refactor (133 assertions / 48
cases under libslic3r, 25 assertions / 6 cases under fff_print [PressureAdvance]).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>