syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"r15:"}]}
source_snippet:         r15: reg, reg_nonzero = ["r15", "15"],
context_before:         r14: reg, reg_nonzero = ["r14", "14"],
context_after:         r16: reg, reg_nonzero = ["r16", "16"],