syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if self as u32 >= v0 as u32 && self as u32 <= v31 as u32 {
context_before:         use AArch64InlineAsmReg::*;
context_after:             return Some(self as u32 - v0 as u32);