syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"cx.typing_env.as_query_input((cx.tcx().erase_regions(ty),"}]}
source_snippet:                         cx.typing_env.as_query_input((cx.tcx().erase_regions(ty), index)),
context_before:                     let tag = cx.tcx().tag_for_variant(
context_after:                     );