syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"x0:"}]}
source_snippet:         x0: reg = ["x0", "w0"],
context_before:     AArch64 AArch64InlineAsmReg AArch64InlineAsmRegClass {
context_after:         x1: reg = ["x1", "w1"],