syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"r12:"}]}
source_snippet:         r12: reg = ["r12", "o4"], // % reserved_o4
context_before:         r11: reg = ["r11", "o3"], // % reserved_o3
context_after:         r13: reg = ["r13", "o5"], // % reserved_o5