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.
13 pub struct StripItem(pub Item);
16 pub fn strip(self) -> Option<Item> {
18 Item { inner: StrippedItem(..), .. } => Some(self.0),
20 i.inner = StrippedItem(box i.inner);
27 pub trait DocFolder : Sized {
28 fn fold_item(&mut self, item: Item) -> Option<Item> {
29 self.fold_item_recur(item)
33 fn fold_inner_recur(&mut self, inner: ItemEnum) -> ItemEnum {
35 StrippedItem(..) => unreachable!(),
37 ModuleItem(self.fold_mod(i))
39 StructItem(mut i) => {
40 let num_fields = i.fields.len();
41 i.fields = i.fields.into_iter().filter_map(|x| self.fold_item(x)).collect();
42 i.fields_stripped |= num_fields != i.fields.len() ||
43 i.fields.iter().any(|f| f.is_stripped());
47 let num_fields = i.fields.len();
48 i.fields = i.fields.into_iter().filter_map(|x| self.fold_item(x)).collect();
49 i.fields_stripped |= num_fields != i.fields.len() ||
50 i.fields.iter().any(|f| f.is_stripped());
54 let num_variants = i.variants.len();
55 i.variants = i.variants.into_iter().filter_map(|x| self.fold_item(x)).collect();
56 i.variants_stripped |= num_variants != i.variants.len() ||
57 i.variants.iter().any(|f| f.is_stripped());
61 i.items = i.items.into_iter().filter_map(|x| self.fold_item(x)).collect();
65 i.items = i.items.into_iter().filter_map(|x| self.fold_item(x)).collect();
69 let i2 = i.clone(); // this clone is small
71 VariantKind::Struct(mut j) => {
72 let num_fields = j.fields.len();
73 j.fields = j.fields.into_iter().filter_map(|x| self.fold_item(x)).collect();
74 j.fields_stripped |= num_fields != j.fields.len() ||
75 j.fields.iter().any(|f| f.is_stripped());
76 VariantItem(Variant {kind: VariantKind::Struct(j), ..i2})
86 fn fold_item_recur(&mut self, item: Item) -> Option<Item> {
98 let inner = match inner {
99 StrippedItem(box i) => StrippedItem(box self.fold_inner_recur(i)),
100 _ => self.fold_inner_recur(inner),
103 Some(Item { attrs, name, source, inner, visibility,
104 stability, deprecation, def_id })
107 fn fold_mod(&mut self, m: Module) -> Module {
109 is_crate: m.is_crate,
110 items: m.items.into_iter().filter_map(|i| self.fold_item(i)).collect()
114 fn fold_crate(&mut self, mut c: Crate) -> Crate {
115 c.module = c.module.take().and_then(|module| self.fold_item(module));
118 let guard = c.external_traits.lock();
119 let traits = guard.replace(Default::default());
120 guard.borrow_mut().extend(traits.into_iter().map(|(k, mut v)| {
121 v.items = v.items.into_iter().filter_map(|i| self.fold_item(i)).collect();