Type Definition syntax::ext::base::BuiltinDeriveFn
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[src]
type BuiltinDeriveFn = fn<'cx>(_: &'cx mut ExtCtxt, _: Span, _: &MetaItem, _: &Annotatable, _: &mut FnMut(Annotatable));
🔬 This is a nightly-only experimental API. (
rustc_private
)