2013-09-12 20:10:51 -05:00
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// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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2013-08-15 15:28:54 -05:00
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//! Rust AST Visitor. Extracts useful information and massages it into a form
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//! usable for clean
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2014-09-23 17:13:56 -05:00
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use std::collections::HashSet;
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2014-04-02 03:19:41 -05:00
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use syntax::abi;
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use syntax::ast;
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use syntax::ast_util;
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use syntax::ast_map;
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use syntax::attr;
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use syntax::attr::AttrMetaMethods;
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use syntax::codemap::Span;
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use syntax::ptr::P;
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use rustc::middle::stability;
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use core;
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use doctree::*;
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2014-07-17 11:45:31 -05:00
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// looks to me like the first two of these are actually
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// output parameters, maybe only mutated once; perhaps
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// better simply to have the visit method return a tuple
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// containing them?
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// also, is there some reason that this doesn't use the 'visit'
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// framework from syntax?
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2014-09-06 11:13:40 -05:00
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pub struct RustdocVisitor<'a, 'tcx: 'a> {
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pub module: Module,
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pub attrs: Vec<ast::Attribute>,
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pub cx: &'a core::DocContext<'tcx>,
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pub analysis: Option<&'a core::CrateAnalysis>,
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view_item_stack: HashSet<ast::NodeId>,
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}
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impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
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pub fn new(cx: &'a core::DocContext<'tcx>,
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analysis: Option<&'a core::CrateAnalysis>) -> RustdocVisitor<'a, 'tcx> {
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// If the root is reexported, terminate all recursion.
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let mut stack = HashSet::new();
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stack.insert(ast::CRATE_NODE_ID);
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RustdocVisitor {
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module: Module::new(None),
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attrs: Vec::new(),
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cx: cx,
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analysis: analysis,
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view_item_stack: stack,
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}
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}
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fn stability(&self, id: ast::NodeId) -> Option<attr::Stability> {
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self.cx.tcx_opt().and_then(|tcx| stability::lookup(tcx, ast_util::local_def(id)))
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}
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pub fn visit(&mut self, krate: &ast::Crate) {
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self.attrs = krate.attrs.clone();
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self.module = self.visit_mod_contents(krate.span,
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krate.attrs.clone(),
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ast::Public,
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ast::CRATE_NODE_ID,
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&krate.module,
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None);
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// attach the crate's exported macros to the top-level module:
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self.module.macros = krate.exported_macros.iter()
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.map(|it| self.visit_macro(&**it)).collect();
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self.module.is_crate = true;
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}
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pub fn visit_struct_def(&mut self, item: &ast::Item,
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name: ast::Ident, sd: &ast::StructDef,
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generics: &ast::Generics) -> Struct {
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debug!("Visiting struct");
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let struct_type = struct_type_from_def(&*sd);
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Struct {
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id: item.id,
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struct_type: struct_type,
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name: name,
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vis: item.vis,
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stab: self.stability(item.id),
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attrs: item.attrs.clone(),
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generics: generics.clone(),
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fields: sd.fields.clone(),
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whence: item.span
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}
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}
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pub fn visit_enum_def(&mut self, it: &ast::Item,
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name: ast::Ident, def: &ast::EnumDef,
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params: &ast::Generics) -> Enum {
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debug!("Visiting enum");
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Enum {
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name: name,
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variants: def.variants.iter().map(|v| Variant {
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name: v.node.name,
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attrs: v.node.attrs.clone(),
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vis: v.node.vis,
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stab: self.stability(v.node.id),
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id: v.node.id,
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kind: v.node.kind.clone(),
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whence: v.span,
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}).collect(),
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vis: it.vis,
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stab: self.stability(it.id),
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generics: params.clone(),
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attrs: it.attrs.clone(),
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id: it.id,
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whence: it.span,
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}
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}
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pub fn visit_fn(&mut self, item: &ast::Item,
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name: ast::Ident, fd: &ast::FnDecl,
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unsafety: &ast::Unsafety, _abi: &abi::Abi,
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gen: &ast::Generics) -> Function {
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debug!("Visiting fn");
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Function {
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id: item.id,
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vis: item.vis,
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stab: self.stability(item.id),
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attrs: item.attrs.clone(),
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decl: fd.clone(),
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name: name,
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whence: item.span,
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generics: gen.clone(),
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unsafety: *unsafety,
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}
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}
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pub fn visit_mod_contents(&mut self, span: Span, attrs: Vec<ast::Attribute> ,
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vis: ast::Visibility, id: ast::NodeId,
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m: &ast::Mod,
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name: Option<ast::Ident>) -> Module {
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let mut om = Module::new(name);
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for item in m.view_items.iter() {
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self.visit_view_item(item, &mut om);
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}
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om.where_outer = span;
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om.where_inner = m.inner;
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om.attrs = attrs;
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om.vis = vis;
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om.stab = self.stability(id);
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om.id = id;
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for i in m.items.iter() {
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self.visit_item(&**i, None, &mut om);
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}
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om
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}
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pub fn visit_view_item(&mut self, item: &ast::ViewItem, om: &mut Module) {
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if item.vis != ast::Public {
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return om.view_items.push(item.clone());
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}
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let please_inline = item.attrs.iter().any(|item| {
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match item.meta_item_list() {
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Some(list) => {
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list.iter().any(|i| i.name().get() == "inline")
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}
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None => false,
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}
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});
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let item = match item.node {
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ast::ViewItemUse(ref vpath) => {
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match self.visit_view_path(&**vpath, om, please_inline) {
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None => return,
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Some(path) => {
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ast::ViewItem {
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node: ast::ViewItemUse(path),
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.. item.clone()
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}
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}
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}
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}
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ast::ViewItemExternCrate(..) => item.clone()
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};
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om.view_items.push(item);
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}
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fn visit_view_path(&mut self, path: &ast::ViewPath,
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om: &mut Module,
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please_inline: bool) -> Option<P<ast::ViewPath>> {
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match path.node {
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ast::ViewPathSimple(dst, _, id) => {
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if self.resolve_id(id, Some(dst), false, om, please_inline) {
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return None
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}
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}
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ast::ViewPathList(ref p, ref paths, ref b) => {
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let mut mine = Vec::new();
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for path in paths.iter() {
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if !self.resolve_id(path.node.id(), None, false, om,
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please_inline) {
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mine.push(path.clone());
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}
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}
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if mine.len() == 0 { return None }
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return Some(P(::syntax::codemap::Spanned {
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node: ast::ViewPathList(p.clone(), mine, b.clone()),
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span: path.span,
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}))
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}
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// these are feature gated anyway
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ast::ViewPathGlob(_, id) => {
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if self.resolve_id(id, None, true, om, please_inline) {
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return None
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}
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}
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}
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Some(P(path.clone()))
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}
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fn resolve_id(&mut self, id: ast::NodeId, renamed: Option<ast::Ident>,
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glob: bool, om: &mut Module, please_inline: bool) -> bool {
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let tcx = match self.cx.tcx_opt() {
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Some(tcx) => tcx,
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None => return false
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};
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let def = (*tcx.def_map.borrow())[id].def_id();
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if !ast_util::is_local(def) { return false }
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let analysis = match self.analysis {
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Some(analysis) => analysis, None => return false
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};
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if !please_inline && analysis.public_items.contains(&def.node) {
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return false
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}
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if !self.view_item_stack.insert(def.node) { return false }
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let ret = match tcx.map.get(def.node) {
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ast_map::NodeItem(it) => {
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if glob {
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match it.node {
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ast::ItemMod(ref m) => {
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for vi in m.view_items.iter() {
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self.visit_view_item(vi, om);
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}
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for i in m.items.iter() {
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self.visit_item(&**i, None, om);
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}
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}
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ast::ItemEnum(..) => {}
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_ => { panic!("glob not mapped to a module or enum"); }
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}
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} else {
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self.visit_item(it, renamed, om);
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}
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true
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}
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_ => false,
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};
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self.view_item_stack.remove(&id);
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return ret;
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}
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pub fn visit_item(&mut self, item: &ast::Item,
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renamed: Option<ast::Ident>, om: &mut Module) {
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2014-10-15 02:20:39 -05:00
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debug!("Visiting item {}", item);
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2014-05-18 08:56:13 -05:00
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let name = renamed.unwrap_or(item.ident);
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2014-01-07 20:46:16 -06:00
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match item.node {
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2014-01-09 07:05:33 -06:00
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ast::ItemMod(ref m) => {
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2014-02-28 19:46:09 -06:00
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om.mods.push(self.visit_mod_contents(item.span,
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2014-05-18 08:56:13 -05:00
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item.attrs.clone(),
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2014-02-28 19:46:09 -06:00
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item.vis,
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item.id,
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m,
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2014-05-18 08:56:13 -05:00
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Some(name)));
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2014-01-07 20:46:16 -06:00
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},
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2014-01-09 07:05:33 -06:00
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ast::ItemEnum(ref ed, ref gen) =>
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2014-05-18 08:56:13 -05:00
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om.enums.push(self.visit_enum_def(item, name, ed, gen)),
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ast::ItemStruct(ref sd, ref gen) =>
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om.structs.push(self.visit_struct_def(item, name, &**sd, gen)),
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2014-05-16 12:15:33 -05:00
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ast::ItemFn(ref fd, ref pur, ref abi, ref gen, _) =>
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2014-05-18 08:56:13 -05:00
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om.fns.push(self.visit_fn(item, name, &**fd, pur, abi, gen)),
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ast::ItemTy(ref ty, ref gen) => {
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2014-01-07 20:46:16 -06:00
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let t = Typedef {
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2014-05-18 08:56:13 -05:00
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ty: ty.clone(),
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2014-01-07 20:46:16 -06:00
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gen: gen.clone(),
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2014-05-18 08:56:13 -05:00
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name: name,
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2014-01-07 20:46:16 -06:00
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id: item.id,
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2014-05-18 08:56:13 -05:00
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attrs: item.attrs.clone(),
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2014-08-11 11:32:26 -05:00
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whence: item.span,
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2014-01-07 20:46:16 -06:00
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vis: item.vis,
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2014-06-26 13:37:39 -05:00
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stab: self.stability(item.id),
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2014-01-07 20:46:16 -06:00
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};
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om.typedefs.push(t);
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},
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2014-05-18 08:56:13 -05:00
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ast::ItemStatic(ref ty, ref mut_, ref exp) => {
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2014-01-07 20:46:16 -06:00
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let s = Static {
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2014-05-18 08:56:13 -05:00
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type_: ty.clone(),
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2014-01-07 20:46:16 -06:00
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mutability: mut_.clone(),
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expr: exp.clone(),
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id: item.id,
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2014-05-18 08:56:13 -05:00
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name: name,
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attrs: item.attrs.clone(),
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2014-08-11 11:32:26 -05:00
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whence: item.span,
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2014-01-07 20:46:16 -06:00
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vis: item.vis,
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2014-06-26 13:37:39 -05:00
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stab: self.stability(item.id),
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2014-01-07 20:46:16 -06:00
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};
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om.statics.push(s);
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},
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2014-10-06 19:41:15 -05:00
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ast::ItemConst(ref ty, ref exp) => {
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let s = Constant {
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type_: ty.clone(),
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expr: exp.clone(),
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id: item.id,
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name: name,
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attrs: item.attrs.clone(),
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whence: item.span,
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vis: item.vis,
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stab: self.stability(item.id),
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};
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om.constants.push(s);
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},
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2014-12-09 18:59:20 -06:00
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ast::ItemTrait(unsafety, ref gen, ref def_ub, ref b, ref items) => {
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2014-01-07 20:46:16 -06:00
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let t = Trait {
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2014-12-09 18:59:20 -06:00
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unsafety: unsafety,
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2014-05-18 08:56:13 -05:00
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name: name,
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items: items.clone(),
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2014-01-07 20:46:16 -06:00
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generics: gen.clone(),
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2014-08-27 20:46:52 -05:00
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bounds: b.iter().map(|x| (*x).clone()).collect(),
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2014-01-07 20:46:16 -06:00
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id: item.id,
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2014-05-18 08:56:13 -05:00
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attrs: item.attrs.clone(),
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2014-08-11 11:32:26 -05:00
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whence: item.span,
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2014-01-07 20:46:16 -06:00
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vis: item.vis,
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2014-06-26 13:37:39 -05:00
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stab: self.stability(item.id),
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2014-11-24 12:14:46 -06:00
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default_unbound: def_ub.clone()
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2014-01-07 20:46:16 -06:00
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};
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om.traits.push(t);
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},
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2014-12-10 05:15:06 -06:00
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ast::ItemImpl(unsafety, ref gen, ref tr, ref ty, ref items) => {
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2014-01-07 20:46:16 -06:00
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let i = Impl {
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2014-12-10 05:15:06 -06:00
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unsafety: unsafety,
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2014-01-07 20:46:16 -06:00
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generics: gen.clone(),
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trait_: tr.clone(),
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2014-05-18 08:56:13 -05:00
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for_: ty.clone(),
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items: items.clone(),
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attrs: item.attrs.clone(),
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2014-01-07 20:46:16 -06:00
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id: item.id,
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2014-08-11 11:32:26 -05:00
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whence: item.span,
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2014-01-07 20:46:16 -06:00
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vis: item.vis,
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2014-06-26 13:37:39 -05:00
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stab: self.stability(item.id),
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2014-01-07 20:46:16 -06:00
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};
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om.impls.push(i);
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},
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2014-01-09 07:05:33 -06:00
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ast::ItemForeignMod(ref fm) => {
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2014-01-07 20:46:16 -06:00
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om.foreigns.push(fm.clone());
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}
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2014-07-17 11:45:31 -05:00
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ast::ItemMac(_) => {
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2014-10-09 14:17:22 -05:00
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panic!("rustdoc: macros should be gone, after expansion");
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2014-02-16 23:40:26 -06:00
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}
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2014-01-07 20:46:16 -06:00
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}
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2013-08-15 15:28:54 -05:00
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}
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2014-07-17 11:45:31 -05:00
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// convert each exported_macro into a doc item
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fn visit_macro(&self, item: &ast::Item) -> Macro {
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Macro {
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id: item.id,
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2014-05-18 08:56:13 -05:00
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attrs: item.attrs.clone(),
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2014-07-17 11:45:31 -05:00
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name: item.ident,
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2014-08-11 11:32:26 -05:00
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whence: item.span,
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2014-07-17 11:45:31 -05:00
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stab: self.stability(item.id),
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}
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}
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2013-08-15 15:28:54 -05:00
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}
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