syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// in registers EAX, EDX, and ECX instead of on the stack.
context_before:     /// On x86-32 targets, the regparm N causes the compiler to pass arguments
context_after:     pub regparm: Option<u32>,