syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"r5:"}]}
source_snippet:         r5: reg = ["r5", "g5"] % reserved_g5,
context_before:         r4: reg = ["r4", "g4"], // % reserved_g4
context_after:         r8: reg = ["r8", "o0"], // % reserved_o0