syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                         if adt_def.non_enum_variant().fields[pat.field].safety.is_unsafe() {
context_before:                     for pat in subpatterns {
context_after:                             self.requires_unsafe(pat.pattern.span, UseOfUnsafeField);