"grammar - reading, reducing the grammar",
"resource - memory consumption (where available)",
"sets - grammar sets: firsts, nullable etc.",
+ "muscles - m4 definitions passed to the skeleton",
"tools - m4 invocation",
"m4 - m4 traces",
"skeleton - skeleton postprocessing",
trace_grammar,
trace_resource,
trace_sets,
+ trace_muscles,
trace_tools,
trace_m4,
trace_skeleton,