Status: IN
Visitor's capacity to accumulate state across elements during traversal (e.g., PricingVisitor summing costs) provides concrete empirical evidence for the principle that traversal and action are orthogonal concerns: the identical traversal infrastructure supports arbitrarily different accumulation computations, demonstrating that separating traversal from action yields genuine combinatorial reuse rather than mere architectural cleanliness.
Visitor's state accumulation empirically confirms traversal-action separability
Depends on (SL): gof-visitor-accumulates-state, traversal-and-action-orthogonal-concerns