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.
12 use std::iter::Extendable;
13 use std::mem::{replace, swap};
16 fn fold_item(&mut self, item: Item) -> Option<Item> {
17 self.fold_item_recur(item)
21 fn fold_item_recur(&mut self, item: Item) -> Option<Item> {
22 let Item { attrs, name, source, visibility, def_id, inner, stability } = item;
24 let inner = match inner {
25 StructItem(mut i) => {
26 let mut foo = Vec::new(); swap(&mut foo, &mut i.fields);
27 let num_fields = foo.len();
28 i.fields.extend(foo.into_iter().filter_map(|x| self.fold_item(x)));
29 i.fields_stripped |= num_fields != i.fields.len();
33 ModuleItem(self.fold_mod(i))
36 let mut foo = Vec::new(); swap(&mut foo, &mut i.variants);
37 let num_variants = foo.len();
38 i.variants.extend(foo.into_iter().filter_map(|x| self.fold_item(x)));
39 i.variants_stripped |= num_variants != i.variants.len();
43 fn vtrm<T: DocFolder>(this: &mut T, trm: TraitMethod)
44 -> Option<TraitMethod> {
46 RequiredMethod(it) => {
47 match this.fold_item(it) {
48 Some(x) => return Some(RequiredMethod(x)),
52 ProvidedMethod(it) => {
53 match this.fold_item(it) {
54 Some(x) => return Some(ProvidedMethod(x)),
58 TypeTraitItem(it) => {
59 match this.fold_item(it) {
60 Some(x) => return Some(TypeTraitItem(x)),
66 let mut foo = Vec::new(); swap(&mut foo, &mut i.items);
67 i.items.extend(foo.into_iter().filter_map(|x| vtrm(self, x)));
71 let mut foo = Vec::new(); swap(&mut foo, &mut i.items);
72 i.items.extend(foo.into_iter()
73 .filter_map(|x| self.fold_item(x)));
77 let i2 = i.clone(); // this clone is small
79 StructVariant(mut j) => {
80 let mut foo = Vec::new(); swap(&mut foo, &mut j.fields);
81 let num_fields = foo.len();
82 let c = |x| self.fold_item(x);
83 j.fields.extend(foo.into_iter().filter_map(c));
84 j.fields_stripped |= num_fields != j.fields.len();
85 VariantItem(Variant {kind: StructVariant(j), ..i2})
93 Some(Item { attrs: attrs, name: name, source: source, inner: inner,
94 visibility: visibility, stability: stability, def_id: def_id })
97 fn fold_mod(&mut self, m: Module) -> Module {
100 items: m.items.into_iter().filter_map(|i| self.fold_item(i)).collect()
104 fn fold_crate(&mut self, mut c: Crate) -> Crate {
105 c.module = match replace(&mut c.module, None) {
106 Some(module) => self.fold_item(module), None => None