syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"x1:"}]}
source_snippet:         x1: reg = ["x1", "ra"],
context_before:     RiscV RiscVInlineAsmReg RiscVInlineAsmRegClass {
context_after:         x5: reg = ["x5", "t0"],