syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"r15:"}]}
source_snippet:         r15: reg = ["r15", "o7"], // % reserved_o7
context_before:         r13: reg = ["r13", "o5"], // % reserved_o5
context_after:         r16: reg = ["r16", "l0"], // % reserved_l0