1 // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
15 pub struct StripItem(pub Item);
18 pub fn strip(self) -> Option<Item> {
20 Item { inner: StrippedItem(..), .. } => Some(self.0),
22 i.inner = StrippedItem(box i.inner);
29 pub trait DocFolder : Sized {
30 fn fold_item(&mut self, item: Item) -> Option<Item> {
31 self.fold_item_recur(item)
35 fn fold_inner_recur(&mut self, inner: ItemEnum) -> ItemEnum {
37 StrippedItem(..) => unreachable!(),
39 ModuleItem(self.fold_mod(i))
41 StructItem(mut i) => {
42 let num_fields = i.fields.len();
43 i.fields = i.fields.into_iter().filter_map(|x| self.fold_item(x)).collect();
44 i.fields_stripped |= num_fields != i.fields.len() ||
45 i.fields.iter().any(|f| f.is_stripped());
49 let num_fields = i.fields.len();
50 i.fields = i.fields.into_iter().filter_map(|x| self.fold_item(x)).collect();
51 i.fields_stripped |= num_fields != i.fields.len() ||
52 i.fields.iter().any(|f| f.is_stripped());
56 let num_variants = i.variants.len();
57 i.variants = i.variants.into_iter().filter_map(|x| self.fold_item(x)).collect();
58 i.variants_stripped |= num_variants != i.variants.len() ||
59 i.variants.iter().any(|f| f.is_stripped());
63 i.items = i.items.into_iter().filter_map(|x| self.fold_item(x)).collect();
67 i.items = i.items.into_iter().filter_map(|x| self.fold_item(x)).collect();
71 let i2 = i.clone(); // this clone is small
73 VariantKind::Struct(mut j) => {
74 let num_fields = j.fields.len();
75 j.fields = j.fields.into_iter().filter_map(|x| self.fold_item(x)).collect();
76 j.fields_stripped |= num_fields != j.fields.len() ||
77 j.fields.iter().any(|f| f.is_stripped());
78 VariantItem(Variant {kind: VariantKind::Struct(j), ..i2})
88 fn fold_item_recur(&mut self, item: Item) -> Option<Item> {
100 let inner = match inner {
101 StrippedItem(box i) => StrippedItem(box self.fold_inner_recur(i)),
102 _ => self.fold_inner_recur(inner),
105 Some(Item { attrs, name, source, inner, visibility,
106 stability, deprecation, def_id })
109 fn fold_mod(&mut self, m: Module) -> Module {
111 is_crate: m.is_crate,
112 items: m.items.into_iter().filter_map(|i| self.fold_item(i)).collect()
116 fn fold_crate(&mut self, mut c: Crate) -> Crate {
117 c.module = c.module.take().and_then(|module| self.fold_item(module));
119 let traits = mem::replace(&mut c.external_traits, Default::default());
120 c.external_traits.extend(traits.into_iter().map(|(k, mut v)| {
121 v.items = v.items.into_iter().filter_map(|i| self.fold_item(i)).collect();