syntax_data: {"ast_node_type":"import","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // FIXME(oli-obk): can we use this to simplify slice/array pattern hacks?
context_before:         // Force the place type to the pattern's type.
context_after:         if let Some(resolved) = place_builder.resolve_upvar(cx) {