Per-bar flags marking the bars inside spec. An unparseable spec string marks nothing: a chart that keeps drawing beats one that dies on a stray character, and the caller can check parseSessionSpec itself to tell an empty window from a bad one.
spec
parseSessionSpec
Per-bar flags marking the bars inside
spec. An unparseable spec string marks nothing: a chart that keeps drawing beats one that dies on a stray character, and the caller can checkparseSessionSpecitself to tell an empty window from a bad one.