syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"@call(mir_cast_transmute,"}]}
source_snippet:             @call(mir_cast_transmute, args) => {
context_before:             @call(mir_discriminant, args) => self.parse_place(args[0]).map(Rvalue::Discriminant),
context_after:                 let source = self.parse_operand(args[0])?;