Function syntax::ext::cfg_attr::expandExperimental
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pub fn expand(cx: &mut ExtCtxt, sp: Span, mi: &MetaItem, it: P<Item>) -> P<Item>
pub fn expand(cx: &mut ExtCtxt, sp: Span, mi: &MetaItem, it: P<Item>) -> P<Item>
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct, enum,
trait, typedef (or
tdef).