syntax_data: {"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"x18:"}]}
source_snippet:         x18: reg = ["x18", "w18"] % reserved_x18,
context_before:         x17: reg = ["x17", "w17"],
context_after:         x20: reg = ["x20", "w20"],