syntax_data: {"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":"macro_rules!"}]}
source_snippet:         macro_rules! clobbered_regs {
context_before:     pub fn clobbered_regs(self) -> &'static [InlineAsmReg] {
context_after:             ($arch:ident $arch_reg:ident {