syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// calls to functions with `#[target_feature]` (RFC 2396).
context_before:     /// The `#[target_feature]` attributes of the body. Used for checking
context_after:     body_target_features: &'tcx [TargetFeature],