syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"r18:"}]}
source_snippet:         r18: reg = ["r18", "l2"], // % reserved_l2
context_before:         r17: reg = ["r17", "l1"], // % reserved_l1
context_after:         r19: reg = ["r19", "l3"], // % reserved_l3