syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Create a new temporary for each deref pattern.
context_before:             PatKind::DerefPattern { ref subpattern, borrow: ByRef::Yes(mutability) } => {
context_after:                 // FIXME(deref_patterns): dedup temporaries to avoid multiple `deref()` calls?