syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"@parse"}]}
source_snippet:         @parse {$($eout:tt)*}, ($puser_value:ident){$($pout:tt)*};
context_before:     (
context_after:             [SUBSTRUCT $substruct_enum:ident $variant:ident] |