syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"Some(Category::Rvalue(RvalueFunc::AsRvalue)"}]}
source_snippet:                     Some(Category::Rvalue(RvalueFunc::AsRvalue) | Category::Constant)
context_before:                     Category::of(&expr.kind),
context_after:                 ));