1441 lines
53 KiB
Rust
1441 lines
53 KiB
Rust
use self::collector::NodeCollector;
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pub use self::def_collector::DefCollector;
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pub use self::definitions::{
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Definitions, DefKey, DefPath, DefPathData, DisambiguatedDefPathData, DefPathHash
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};
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use crate::dep_graph::{DepGraph, DepNode, DepKind, DepNodeIndex};
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use crate::hir::*;
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use crate::hir::DefKind;
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use crate::hir::def_id::{CRATE_DEF_INDEX, DefId, LocalDefId};
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use crate::hir::itemlikevisit::ItemLikeVisitor;
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use crate::hir::print::Nested;
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use crate::middle::cstore::CrateStoreDyn;
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use crate::ty::query::Providers;
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use crate::util::nodemap::FxHashMap;
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use crate::util::common::time;
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use rustc_target::spec::abi::Abi;
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use rustc_data_structures::svh::Svh;
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use rustc_index::vec::IndexVec;
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use syntax::ast::{self, Name, NodeId};
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use syntax::source_map::Spanned;
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use syntax::ext::base::MacroKind;
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use syntax_pos::{Span, DUMMY_SP};
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pub mod blocks;
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mod collector;
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mod def_collector;
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pub mod definitions;
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mod hir_id_validator;
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/// Represents an entry and its parent `HirId`.
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#[derive(Copy, Clone, Debug)]
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pub struct Entry<'hir> {
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parent: HirId,
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dep_node: DepNodeIndex,
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node: Node<'hir>,
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}
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impl<'hir> Entry<'hir> {
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fn parent_node(self) -> Option<HirId> {
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match self.node {
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Node::Crate | Node::MacroDef(_) => None,
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_ => Some(self.parent),
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}
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}
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fn fn_decl(&self) -> Option<&'hir FnDecl> {
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match self.node {
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Node::Item(ref item) => {
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match item.kind {
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ItemKind::Fn(ref fn_decl, _, _, _) => Some(fn_decl),
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_ => None,
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}
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}
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Node::TraitItem(ref item) => {
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match item.kind {
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TraitItemKind::Method(ref method_sig, _) => Some(&method_sig.decl),
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_ => None
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}
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}
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Node::ImplItem(ref item) => {
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match item.kind {
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ImplItemKind::Method(ref method_sig, _) => Some(&method_sig.decl),
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_ => None,
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}
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}
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Node::Expr(ref expr) => {
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match expr.kind {
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ExprKind::Closure(_, ref fn_decl, ..) => Some(fn_decl),
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_ => None,
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}
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}
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_ => None,
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}
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}
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fn associated_body(self) -> Option<BodyId> {
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match self.node {
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Node::Item(item) => {
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match item.kind {
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ItemKind::Const(_, body) |
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ItemKind::Static(.., body) |
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ItemKind::Fn(_, _, _, body) => Some(body),
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_ => None,
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}
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}
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Node::TraitItem(item) => {
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match item.kind {
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TraitItemKind::Const(_, Some(body)) |
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TraitItemKind::Method(_, TraitMethod::Provided(body)) => Some(body),
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_ => None
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}
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}
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Node::ImplItem(item) => {
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match item.kind {
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ImplItemKind::Const(_, body) |
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ImplItemKind::Method(_, body) => Some(body),
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_ => None,
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}
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}
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Node::AnonConst(constant) => Some(constant.body),
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Node::Expr(expr) => {
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match expr.kind {
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ExprKind::Closure(.., body, _, _) => Some(body),
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_ => None,
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}
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}
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_ => None
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}
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}
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fn is_body_owner(self, hir_id: HirId) -> bool {
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match self.associated_body() {
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Some(b) => b.hir_id == hir_id,
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None => false,
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}
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}
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}
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/// Stores a crate and any number of inlined items from other crates.
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pub struct Forest {
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krate: Crate,
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pub dep_graph: DepGraph,
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}
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impl Forest {
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pub fn new(krate: Crate, dep_graph: &DepGraph) -> Forest {
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Forest {
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krate,
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dep_graph: dep_graph.clone(),
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}
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}
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pub fn krate(&self) -> &Crate {
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self.dep_graph.read(DepNode::new_no_params(DepKind::Krate));
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&self.krate
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}
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/// This is used internally in the dependency tracking system.
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/// Use the `krate` method to ensure your dependency on the
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/// crate is tracked.
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pub fn untracked_krate(&self) -> &Crate {
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&self.krate
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}
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}
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/// This type is effectively a `HashMap<HirId, Entry<'hir>>`,
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/// but it is implemented as 2 layers of arrays.
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/// - first we have `A = Vec<Option<B>>` mapping a `DefIndex`'s index to an inner value
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/// - which is `B = IndexVec<ItemLocalId, Option<Entry<'hir>>` which gives you the `Entry`.
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pub(super) type HirEntryMap<'hir> = Vec<Option<IndexVec<ItemLocalId, Option<Entry<'hir>>>>>;
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/// Represents a mapping from `NodeId`s to AST elements and their parent `NodeId`s.
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#[derive(Clone)]
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pub struct Map<'hir> {
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/// The backing storage for all the AST nodes.
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pub forest: &'hir Forest,
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/// Same as the dep_graph in forest, just available with one fewer
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/// deref. This is a gratuitous micro-optimization.
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pub dep_graph: DepGraph,
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/// The SVH of the local crate.
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pub crate_hash: Svh,
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map: HirEntryMap<'hir>,
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definitions: &'hir Definitions,
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/// The reverse mapping of `node_to_hir_id`.
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hir_to_node_id: FxHashMap<HirId, NodeId>,
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}
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struct ParentHirIterator<'map> {
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current_id: HirId,
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map: &'map Map<'map>,
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}
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impl<'map> ParentHirIterator<'map> {
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fn new(current_id: HirId, map: &'map Map<'map>) -> ParentHirIterator<'map> {
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ParentHirIterator {
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current_id,
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map,
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}
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}
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}
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impl<'map> Iterator for ParentHirIterator<'map> {
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type Item = (HirId, Node<'map>);
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fn next(&mut self) -> Option<Self::Item> {
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if self.current_id == CRATE_HIR_ID {
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return None;
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}
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loop { // There are nodes that do not have entries, so we need to skip them.
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let parent_id = self.map.get_parent_node(self.current_id);
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if parent_id == self.current_id {
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self.current_id = CRATE_HIR_ID;
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return None;
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}
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self.current_id = parent_id;
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if let Some(entry) = self.map.find_entry(parent_id) {
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return Some((parent_id, entry.node));
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}
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// If this `HirId` doesn't have an `Entry`, skip it and look for its `parent_id`.
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}
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}
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}
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impl<'hir> Map<'hir> {
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#[inline]
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fn lookup(&self, id: HirId) -> Option<&Entry<'hir>> {
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let local_map = self.map.get(id.owner.index())?;
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local_map.as_ref()?.get(id.local_id)?.as_ref()
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}
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/// Registers a read in the dependency graph of the AST node with
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/// the given `id`. This needs to be called each time a public
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/// function returns the HIR for a node -- in other words, when it
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/// "reveals" the content of a node to the caller (who might not
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/// otherwise have had access to those contents, and hence needs a
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/// read recorded). If the function just returns a DefId or
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/// HirId, no actual content was returned, so no read is needed.
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pub fn read(&self, hir_id: HirId) {
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if let Some(entry) = self.lookup(hir_id) {
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self.dep_graph.read_index(entry.dep_node);
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} else {
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bug!("called `HirMap::read()` with invalid `HirId`: {:?}", hir_id)
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}
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}
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#[inline]
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pub fn definitions(&self) -> &'hir Definitions {
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self.definitions
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}
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pub fn def_key(&self, def_id: DefId) -> DefKey {
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assert!(def_id.is_local());
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self.definitions.def_key(def_id.index)
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}
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pub fn def_path_from_hir_id(&self, id: HirId) -> Option<DefPath> {
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self.opt_local_def_id(id).map(|def_id| {
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self.def_path(def_id)
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})
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}
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pub fn def_path(&self, def_id: DefId) -> DefPath {
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assert!(def_id.is_local());
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self.definitions.def_path(def_id.index)
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}
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#[inline]
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pub fn local_def_id_from_node_id(&self, node: NodeId) -> DefId {
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self.opt_local_def_id_from_node_id(node).unwrap_or_else(|| {
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let hir_id = self.node_to_hir_id(node);
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bug!("local_def_id_from_node_id: no entry for `{}`, which has a map of `{:?}`",
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node, self.find_entry(hir_id))
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})
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}
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#[inline]
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pub fn local_def_id(&self, hir_id: HirId) -> DefId {
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self.opt_local_def_id(hir_id).unwrap_or_else(|| {
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bug!("local_def_id: no entry for `{:?}`, which has a map of `{:?}`",
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hir_id, self.find_entry(hir_id))
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})
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}
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#[inline]
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pub fn opt_local_def_id(&self, hir_id: HirId) -> Option<DefId> {
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let node_id = self.hir_to_node_id(hir_id);
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self.definitions.opt_local_def_id(node_id)
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}
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#[inline]
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pub fn opt_local_def_id_from_node_id(&self, node: NodeId) -> Option<DefId> {
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self.definitions.opt_local_def_id(node)
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}
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#[inline]
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pub fn as_local_node_id(&self, def_id: DefId) -> Option<NodeId> {
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self.definitions.as_local_node_id(def_id)
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}
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#[inline]
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pub fn as_local_hir_id(&self, def_id: DefId) -> Option<HirId> {
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self.definitions.as_local_hir_id(def_id)
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}
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#[inline]
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pub fn hir_to_node_id(&self, hir_id: HirId) -> NodeId {
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self.hir_to_node_id[&hir_id]
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}
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#[inline]
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pub fn node_to_hir_id(&self, node_id: NodeId) -> HirId {
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self.definitions.node_to_hir_id(node_id)
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}
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#[inline]
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pub fn def_index_to_hir_id(&self, def_index: DefIndex) -> HirId {
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self.definitions.def_index_to_hir_id(def_index)
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}
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#[inline]
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pub fn local_def_id_to_hir_id(&self, def_id: LocalDefId) -> HirId {
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self.definitions.def_index_to_hir_id(def_id.to_def_id().index)
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}
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pub fn def_kind(&self, hir_id: HirId) -> Option<DefKind> {
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let node = if let Some(node) = self.find(hir_id) {
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node
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} else {
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return None
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};
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Some(match node {
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Node::Item(item) => {
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match item.kind {
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ItemKind::Static(..) => DefKind::Static,
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ItemKind::Const(..) => DefKind::Const,
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ItemKind::Fn(..) => DefKind::Fn,
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ItemKind::Mod(..) => DefKind::Mod,
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ItemKind::OpaqueTy(..) => DefKind::OpaqueTy,
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ItemKind::TyAlias(..) => DefKind::TyAlias,
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ItemKind::Enum(..) => DefKind::Enum,
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ItemKind::Struct(..) => DefKind::Struct,
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ItemKind::Union(..) => DefKind::Union,
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ItemKind::Trait(..) => DefKind::Trait,
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ItemKind::TraitAlias(..) => DefKind::TraitAlias,
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ItemKind::ExternCrate(_) |
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ItemKind::Use(..) |
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ItemKind::ForeignMod(..) |
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ItemKind::GlobalAsm(..) |
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ItemKind::Impl(..) => return None,
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}
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}
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Node::ForeignItem(item) => {
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match item.kind {
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ForeignItemKind::Fn(..) => DefKind::Fn,
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ForeignItemKind::Static(..) => DefKind::Static,
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ForeignItemKind::Type => DefKind::ForeignTy,
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}
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}
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Node::TraitItem(item) => {
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match item.kind {
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TraitItemKind::Const(..) => DefKind::AssocConst,
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TraitItemKind::Method(..) => DefKind::Method,
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TraitItemKind::Type(..) => DefKind::AssocTy,
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}
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}
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Node::ImplItem(item) => {
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match item.kind {
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ImplItemKind::Const(..) => DefKind::AssocConst,
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ImplItemKind::Method(..) => DefKind::Method,
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ImplItemKind::TyAlias(..) => DefKind::AssocTy,
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ImplItemKind::OpaqueTy(..) => DefKind::AssocOpaqueTy,
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}
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}
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Node::Variant(_) => DefKind::Variant,
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Node::Ctor(variant_data) => {
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// FIXME(eddyb) is this even possible, if we have a `Node::Ctor`?
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if variant_data.ctor_hir_id().is_none() {
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return None;
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}
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let ctor_of = match self.find(self.get_parent_node(hir_id)) {
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Some(Node::Item(..)) => def::CtorOf::Struct,
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Some(Node::Variant(..)) => def::CtorOf::Variant,
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_ => unreachable!(),
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};
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DefKind::Ctor(ctor_of, def::CtorKind::from_hir(variant_data))
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}
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Node::AnonConst(_) |
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Node::Field(_) |
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Node::Expr(_) |
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Node::Stmt(_) |
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Node::PathSegment(_) |
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Node::Ty(_) |
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Node::TraitRef(_) |
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Node::Pat(_) |
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Node::Binding(_) |
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Node::Local(_) |
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Node::Param(_) |
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Node::Arm(_) |
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Node::Lifetime(_) |
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Node::Visibility(_) |
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Node::Block(_) |
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Node::Crate => return None,
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Node::MacroDef(_) => DefKind::Macro(MacroKind::Bang),
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Node::GenericParam(param) => {
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match param.kind {
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GenericParamKind::Lifetime { .. } => return None,
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GenericParamKind::Type { .. } => DefKind::TyParam,
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GenericParamKind::Const { .. } => DefKind::ConstParam,
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}
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}
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})
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}
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fn find_entry(&self, id: HirId) -> Option<Entry<'hir>> {
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self.lookup(id).cloned()
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}
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pub fn krate(&self) -> &'hir Crate {
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self.forest.krate()
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}
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pub fn trait_item(&self, id: TraitItemId) -> &'hir TraitItem {
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self.read(id.hir_id);
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// N.B., intentionally bypass `self.forest.krate()` so that we
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// do not trigger a read of the whole krate here
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self.forest.krate.trait_item(id)
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}
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|
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pub fn impl_item(&self, id: ImplItemId) -> &'hir ImplItem {
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self.read(id.hir_id);
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|
|
|
// N.B., intentionally bypass `self.forest.krate()` so that we
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// do not trigger a read of the whole krate here
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self.forest.krate.impl_item(id)
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}
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|
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pub fn body(&self, id: BodyId) -> &'hir Body {
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self.read(id.hir_id);
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|
|
|
// N.B., intentionally bypass `self.forest.krate()` so that we
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// do not trigger a read of the whole krate here
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self.forest.krate.body(id)
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}
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|
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|
pub fn fn_decl_by_hir_id(&self, hir_id: HirId) -> Option<&'hir FnDecl> {
|
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if let Some(entry) = self.find_entry(hir_id) {
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entry.fn_decl()
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|
} else {
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|
bug!("no entry for hir_id `{}`", hir_id)
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|
}
|
|
}
|
|
|
|
/// Returns the `HirId` that corresponds to the definition of
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/// which this is the body of, i.e., a `fn`, `const` or `static`
|
|
/// item (possibly associated), a closure, or a `hir::AnonConst`.
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|
pub fn body_owner(&self, BodyId { hir_id }: BodyId) -> HirId {
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|
let parent = self.get_parent_node(hir_id);
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assert!(self.lookup(parent).map_or(false, |e| e.is_body_owner(hir_id)));
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parent
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|
}
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|
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pub fn body_owner_def_id(&self, id: BodyId) -> DefId {
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self.local_def_id(self.body_owner(id))
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}
|
|
|
|
/// Given a `HirId`, returns the `BodyId` associated with it,
|
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/// if the node is a body owner, otherwise returns `None`.
|
|
pub fn maybe_body_owned_by(&self, hir_id: HirId) -> Option<BodyId> {
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|
if let Some(entry) = self.find_entry(hir_id) {
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|
if self.dep_graph.is_fully_enabled() {
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let hir_id_owner = hir_id.owner;
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let def_path_hash = self.definitions.def_path_hash(hir_id_owner);
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self.dep_graph.read(def_path_hash.to_dep_node(DepKind::HirBody));
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}
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|
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entry.associated_body()
|
|
} else {
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bug!("no entry for id `{}`", hir_id)
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|
}
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|
}
|
|
|
|
/// Given a body owner's id, returns the `BodyId` associated with it.
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|
pub fn body_owned_by(&self, id: HirId) -> BodyId {
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self.maybe_body_owned_by(id).unwrap_or_else(|| {
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span_bug!(self.span(id), "body_owned_by: {} has no associated body",
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self.node_to_string(id));
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|
})
|
|
}
|
|
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pub fn body_owner_kind(&self, id: HirId) -> BodyOwnerKind {
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match self.get(id) {
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Node::Item(&Item { kind: ItemKind::Const(..), .. }) |
|
|
Node::TraitItem(&TraitItem { kind: TraitItemKind::Const(..), .. }) |
|
|
Node::ImplItem(&ImplItem { kind: ImplItemKind::Const(..), .. }) |
|
|
Node::AnonConst(_) => {
|
|
BodyOwnerKind::Const
|
|
}
|
|
Node::Ctor(..) |
|
|
Node::Item(&Item { kind: ItemKind::Fn(..), .. }) |
|
|
Node::TraitItem(&TraitItem { kind: TraitItemKind::Method(..), .. }) |
|
|
Node::ImplItem(&ImplItem { kind: ImplItemKind::Method(..), .. }) => {
|
|
BodyOwnerKind::Fn
|
|
}
|
|
Node::Item(&Item { kind: ItemKind::Static(_, m, _), .. }) => {
|
|
BodyOwnerKind::Static(m)
|
|
}
|
|
Node::Expr(&Expr { kind: ExprKind::Closure(..), .. }) => {
|
|
BodyOwnerKind::Closure
|
|
}
|
|
node => bug!("{:#?} is not a body node", node),
|
|
}
|
|
}
|
|
|
|
pub fn ty_param_owner(&self, id: HirId) -> HirId {
|
|
match self.get(id) {
|
|
Node::Item(&Item { kind: ItemKind::Trait(..), .. }) |
|
|
Node::Item(&Item { kind: ItemKind::TraitAlias(..), .. }) => id,
|
|
Node::GenericParam(_) => self.get_parent_node(id),
|
|
_ => bug!("ty_param_owner: {} not a type parameter", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
pub fn ty_param_name(&self, id: HirId) -> Name {
|
|
match self.get(id) {
|
|
Node::Item(&Item { kind: ItemKind::Trait(..), .. }) |
|
|
Node::Item(&Item { kind: ItemKind::TraitAlias(..), .. }) => kw::SelfUpper,
|
|
Node::GenericParam(param) => param.name.ident().name,
|
|
_ => bug!("ty_param_name: {} not a type parameter", self.node_to_string(id)),
|
|
}
|
|
}
|
|
|
|
pub fn trait_impls(&self, trait_did: DefId) -> &'hir [HirId] {
|
|
self.dep_graph.read(DepNode::new_no_params(DepKind::AllLocalTraitImpls));
|
|
|
|
// N.B., intentionally bypass `self.forest.krate()` so that we
|
|
// do not trigger a read of the whole krate here
|
|
self.forest.krate.trait_impls.get(&trait_did).map_or(&[], |xs| &xs[..])
|
|
}
|
|
|
|
/// Gets the attributes on the crate. This is preferable to
|
|
/// invoking `krate.attrs` because it registers a tighter
|
|
/// dep-graph access.
|
|
pub fn krate_attrs(&self) -> &'hir [ast::Attribute] {
|
|
let def_path_hash = self.definitions.def_path_hash(CRATE_DEF_INDEX);
|
|
|
|
self.dep_graph.read(def_path_hash.to_dep_node(DepKind::Hir));
|
|
&self.forest.krate.attrs
|
|
}
|
|
|
|
pub fn get_module(&self, module: DefId) -> (&'hir Mod, Span, HirId) {
|
|
let hir_id = self.as_local_hir_id(module).unwrap();
|
|
self.read(hir_id);
|
|
match self.find_entry(hir_id).unwrap().node {
|
|
Node::Item(&Item {
|
|
span,
|
|
kind: ItemKind::Mod(ref m),
|
|
..
|
|
}) => (m, span, hir_id),
|
|
Node::Crate => (&self.forest.krate.module, self.forest.krate.span, hir_id),
|
|
node => panic!("not a module: {:?}", node),
|
|
}
|
|
}
|
|
|
|
pub fn visit_item_likes_in_module<V>(&self, module: DefId, visitor: &mut V)
|
|
where V: ItemLikeVisitor<'hir>
|
|
{
|
|
let hir_id = self.as_local_hir_id(module).unwrap();
|
|
|
|
// Read the module so we'll be re-executed if new items
|
|
// appear immediately under in the module. If some new item appears
|
|
// in some nested item in the module, we'll be re-executed due to reads
|
|
// in the expect_* calls the loops below
|
|
self.read(hir_id);
|
|
|
|
let module = &self.forest.krate.modules[&hir_id];
|
|
|
|
for id in &module.items {
|
|
visitor.visit_item(self.expect_item(*id));
|
|
}
|
|
|
|
for id in &module.trait_items {
|
|
visitor.visit_trait_item(self.expect_trait_item(id.hir_id));
|
|
}
|
|
|
|
for id in &module.impl_items {
|
|
visitor.visit_impl_item(self.expect_impl_item(id.hir_id));
|
|
}
|
|
}
|
|
|
|
/// Retrieves the `Node` corresponding to `id`, panicking if it cannot be found.
|
|
pub fn get(&self, id: HirId) -> Node<'hir> {
|
|
// read recorded by `find`
|
|
self.find(id).unwrap_or_else(||
|
|
bug!("couldn't find hir id {} in the HIR map", id))
|
|
}
|
|
|
|
pub fn get_if_local(&self, id: DefId) -> Option<Node<'hir>> {
|
|
self.as_local_hir_id(id).map(|id| self.get(id)) // read recorded by `get`
|
|
}
|
|
|
|
pub fn get_generics(&self, id: DefId) -> Option<&'hir Generics> {
|
|
self.get_if_local(id).and_then(|node| {
|
|
match node {
|
|
Node::ImplItem(ref impl_item) => Some(&impl_item.generics),
|
|
Node::TraitItem(ref trait_item) => Some(&trait_item.generics),
|
|
Node::Item(ref item) => {
|
|
match item.kind {
|
|
ItemKind::Fn(_, _, ref generics, _) |
|
|
ItemKind::TyAlias(_, ref generics) |
|
|
ItemKind::Enum(_, ref generics) |
|
|
ItemKind::Struct(_, ref generics) |
|
|
ItemKind::Union(_, ref generics) |
|
|
ItemKind::Trait(_, _, ref generics, ..) |
|
|
ItemKind::TraitAlias(ref generics, _) |
|
|
ItemKind::Impl(_, _, _, ref generics, ..) => Some(generics),
|
|
_ => None,
|
|
}
|
|
}
|
|
_ => None,
|
|
}
|
|
})
|
|
}
|
|
|
|
/// Retrieves the `Node` corresponding to `id`, returning `None` if cannot be found.
|
|
pub fn find(&self, hir_id: HirId) -> Option<Node<'hir>> {
|
|
let result = self.find_entry(hir_id).and_then(|entry| {
|
|
if let Node::Crate = entry.node {
|
|
None
|
|
} else {
|
|
Some(entry.node)
|
|
}
|
|
});
|
|
if result.is_some() {
|
|
self.read(hir_id);
|
|
}
|
|
result
|
|
}
|
|
|
|
/// Similar to `get_parent`; returns the parent HIR Id, or just `hir_id` if there
|
|
/// is no parent. Note that the parent may be `CRATE_HIR_ID`, which is not itself
|
|
/// present in the map, so passing the return value of `get_parent_node` to
|
|
/// `get` may in fact panic.
|
|
/// This function returns the immediate parent in the HIR, whereas `get_parent`
|
|
/// returns the enclosing item. Note that this might not be the actual parent
|
|
/// node in the HIR -- some kinds of nodes are not in the map and these will
|
|
/// never appear as the parent node. Thus, you can always walk the parent nodes
|
|
/// from a node to the root of the HIR (unless you get back the same ID here,
|
|
/// which can happen if the ID is not in the map itself or is just weird).
|
|
pub fn get_parent_node(&self, hir_id: HirId) -> HirId {
|
|
if self.dep_graph.is_fully_enabled() {
|
|
let hir_id_owner = hir_id.owner;
|
|
let def_path_hash = self.definitions.def_path_hash(hir_id_owner);
|
|
self.dep_graph.read(def_path_hash.to_dep_node(DepKind::HirBody));
|
|
}
|
|
|
|
self.find_entry(hir_id)
|
|
.and_then(|x| x.parent_node())
|
|
.unwrap_or(hir_id)
|
|
}
|
|
|
|
/// Checks if the node is an argument. An argument is a local variable whose
|
|
/// immediate parent is an item or a closure.
|
|
pub fn is_argument(&self, id: HirId) -> bool {
|
|
match self.find(id) {
|
|
Some(Node::Binding(_)) => (),
|
|
_ => return false,
|
|
}
|
|
match self.find(self.get_parent_node(id)) {
|
|
Some(Node::Item(_)) |
|
|
Some(Node::TraitItem(_)) |
|
|
Some(Node::ImplItem(_)) => true,
|
|
Some(Node::Expr(e)) => {
|
|
match e.kind {
|
|
ExprKind::Closure(..) => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
/// Whether the expression pointed at by `hir_id` belongs to a `const` evaluation context.
|
|
/// Used exclusively for diagnostics, to avoid suggestion function calls.
|
|
pub fn is_const_context(&self, hir_id: HirId) -> bool {
|
|
let parent_id = self.get_parent_item(hir_id);
|
|
match self.get(parent_id) {
|
|
Node::Item(&Item {
|
|
kind: ItemKind::Const(..),
|
|
..
|
|
})
|
|
| Node::TraitItem(&TraitItem {
|
|
kind: TraitItemKind::Const(..),
|
|
..
|
|
})
|
|
| Node::ImplItem(&ImplItem {
|
|
kind: ImplItemKind::Const(..),
|
|
..
|
|
})
|
|
| Node::AnonConst(_)
|
|
| Node::Item(&Item {
|
|
kind: ItemKind::Static(..),
|
|
..
|
|
}) => true,
|
|
Node::Item(&Item {
|
|
kind: ItemKind::Fn(_, header, ..),
|
|
..
|
|
}) => header.constness == Constness::Const,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
/// Wether `hir_id` corresponds to a `mod` or a crate.
|
|
pub fn is_hir_id_module(&self, hir_id: HirId) -> bool {
|
|
match self.lookup(hir_id) {
|
|
Some(Entry { node: Node::Item(Item { kind: ItemKind::Mod(_), .. }), .. }) |
|
|
Some(Entry { node: Node::Crate, .. }) => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
/// Retrieves the `HirId` for `id`'s enclosing method, unless there's a
|
|
/// `while` or `loop` before reaching it, as block tail returns are not
|
|
/// available in them.
|
|
///
|
|
/// ```
|
|
/// fn foo(x: usize) -> bool {
|
|
/// if x == 1 {
|
|
/// true // If `get_return_block` gets passed the `id` corresponding
|
|
/// } else { // to this, it will return `foo`'s `HirId`.
|
|
/// false
|
|
/// }
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// ```
|
|
/// fn foo(x: usize) -> bool {
|
|
/// loop {
|
|
/// true // If `get_return_block` gets passed the `id` corresponding
|
|
/// } // to this, it will return `None`.
|
|
/// false
|
|
/// }
|
|
/// ```
|
|
pub fn get_return_block(&self, id: HirId) -> Option<HirId> {
|
|
let mut iter = ParentHirIterator::new(id, &self).peekable();
|
|
let mut ignore_tail = false;
|
|
if let Some(entry) = self.find_entry(id) {
|
|
if let Node::Expr(Expr { kind: ExprKind::Ret(_), .. }) = entry.node {
|
|
// When dealing with `return` statements, we don't care about climbing only tail
|
|
// expressions.
|
|
ignore_tail = true;
|
|
}
|
|
}
|
|
while let Some((hir_id, node)) = iter.next() {
|
|
if let (Some((_, next_node)), false) = (iter.peek(), ignore_tail) {
|
|
match next_node {
|
|
Node::Block(Block { expr: None, .. }) => return None,
|
|
Node::Block(Block { expr: Some(expr), .. }) => {
|
|
if hir_id != expr.hir_id {
|
|
// The current node is not the tail expression of its parent.
|
|
return None;
|
|
}
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
match node {
|
|
Node::Item(_) |
|
|
Node::ForeignItem(_) |
|
|
Node::TraitItem(_) |
|
|
Node::Expr(Expr { kind: ExprKind::Closure(..), ..}) |
|
|
Node::ImplItem(_) => return Some(hir_id),
|
|
Node::Expr(ref expr) => {
|
|
match expr.kind {
|
|
// Ignore `return`s on the first iteration
|
|
ExprKind::Loop(..) | ExprKind::Ret(..) => return None,
|
|
_ => {}
|
|
}
|
|
}
|
|
Node::Local(_) => return None,
|
|
_ => {}
|
|
}
|
|
}
|
|
None
|
|
}
|
|
|
|
/// Retrieves the `HirId` for `id`'s parent item, or `id` itself if no
|
|
/// parent item is in this map. The "parent item" is the closest parent node
|
|
/// in the HIR which is recorded by the map and is an item, either an item
|
|
/// in a module, trait, or impl.
|
|
pub fn get_parent_item(&self, hir_id: HirId) -> HirId {
|
|
for (hir_id, node) in ParentHirIterator::new(hir_id, &self) {
|
|
match node {
|
|
Node::Crate |
|
|
Node::Item(_) |
|
|
Node::ForeignItem(_) |
|
|
Node::TraitItem(_) |
|
|
Node::ImplItem(_) => return hir_id,
|
|
_ => {}
|
|
}
|
|
}
|
|
hir_id
|
|
}
|
|
|
|
/// Returns the `DefId` of `id`'s nearest module parent, or `id` itself if no
|
|
/// module parent is in this map.
|
|
pub fn get_module_parent(&self, id: HirId) -> DefId {
|
|
self.local_def_id(self.get_module_parent_node(id))
|
|
}
|
|
|
|
/// Returns the `HirId` of `id`'s nearest module parent, or `id` itself if no
|
|
/// module parent is in this map.
|
|
pub fn get_module_parent_node(&self, hir_id: HirId) -> HirId {
|
|
for (hir_id, node) in ParentHirIterator::new(hir_id, &self) {
|
|
if let Node::Item(&Item { kind: ItemKind::Mod(_), .. }) = node {
|
|
return hir_id;
|
|
}
|
|
}
|
|
CRATE_HIR_ID
|
|
}
|
|
|
|
/// Returns the nearest enclosing scope. A scope is roughly an item or block.
|
|
pub fn get_enclosing_scope(&self, hir_id: HirId) -> Option<HirId> {
|
|
for (hir_id, node) in ParentHirIterator::new(hir_id, &self) {
|
|
if match node {
|
|
Node::Item(i) => {
|
|
match i.kind {
|
|
ItemKind::Fn(..)
|
|
| ItemKind::Mod(..)
|
|
| ItemKind::Enum(..)
|
|
| ItemKind::Struct(..)
|
|
| ItemKind::Union(..)
|
|
| ItemKind::Trait(..)
|
|
| ItemKind::Impl(..) => true,
|
|
_ => false,
|
|
}
|
|
},
|
|
Node::ForeignItem(fi) => {
|
|
match fi.kind {
|
|
ForeignItemKind::Fn(..) => true,
|
|
_ => false,
|
|
}
|
|
},
|
|
Node::TraitItem(ti) => {
|
|
match ti.kind {
|
|
TraitItemKind::Method(..) => true,
|
|
_ => false,
|
|
}
|
|
},
|
|
Node::ImplItem(ii) => {
|
|
match ii.kind {
|
|
ImplItemKind::Method(..) => true,
|
|
_ => false,
|
|
}
|
|
},
|
|
Node::Block(_) => true,
|
|
_ => false,
|
|
} {
|
|
return Some(hir_id);
|
|
}
|
|
}
|
|
None
|
|
}
|
|
|
|
/// Returns the defining scope for an opaque type definition.
|
|
pub fn get_defining_scope(&self, id: HirId) -> HirId {
|
|
let mut scope = id;
|
|
loop {
|
|
scope = self.get_enclosing_scope(scope).unwrap_or(CRATE_HIR_ID);
|
|
if scope == CRATE_HIR_ID {
|
|
return CRATE_HIR_ID;
|
|
}
|
|
match self.get(scope) {
|
|
Node::Item(i) => {
|
|
match i.kind {
|
|
ItemKind::OpaqueTy(OpaqueTy { impl_trait_fn: None, .. }) => {}
|
|
_ => break,
|
|
}
|
|
}
|
|
Node::Block(_) => {}
|
|
_ => break,
|
|
}
|
|
}
|
|
scope
|
|
}
|
|
|
|
pub fn get_parent_did(&self, id: HirId) -> DefId {
|
|
self.local_def_id(self.get_parent_item(id))
|
|
}
|
|
|
|
pub fn get_foreign_abi(&self, hir_id: HirId) -> Abi {
|
|
let parent = self.get_parent_item(hir_id);
|
|
if let Some(entry) = self.find_entry(parent) {
|
|
if let Entry {
|
|
node: Node::Item(Item { kind: ItemKind::ForeignMod(ref nm), .. }), .. } = entry
|
|
{
|
|
self.read(hir_id); // reveals some of the content of a node
|
|
return nm.abi;
|
|
}
|
|
}
|
|
bug!("expected foreign mod or inlined parent, found {}", self.node_to_string(parent))
|
|
}
|
|
|
|
pub fn expect_item(&self, id: HirId) -> &'hir Item {
|
|
match self.find(id) { // read recorded by `find`
|
|
Some(Node::Item(item)) => item,
|
|
_ => bug!("expected item, found {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
pub fn expect_impl_item(&self, id: HirId) -> &'hir ImplItem {
|
|
match self.find(id) {
|
|
Some(Node::ImplItem(item)) => item,
|
|
_ => bug!("expected impl item, found {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
pub fn expect_trait_item(&self, id: HirId) -> &'hir TraitItem {
|
|
match self.find(id) {
|
|
Some(Node::TraitItem(item)) => item,
|
|
_ => bug!("expected trait item, found {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
pub fn expect_variant_data(&self, id: HirId) -> &'hir VariantData {
|
|
match self.find(id) {
|
|
Some(Node::Item(i)) => {
|
|
match i.kind {
|
|
ItemKind::Struct(ref struct_def, _) |
|
|
ItemKind::Union(ref struct_def, _) => struct_def,
|
|
_ => bug!("struct ID bound to non-struct {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
Some(Node::Variant(variant)) => &variant.data,
|
|
Some(Node::Ctor(data)) => data,
|
|
_ => bug!("expected struct or variant, found {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
pub fn expect_variant(&self, id: HirId) -> &'hir Variant {
|
|
match self.find(id) {
|
|
Some(Node::Variant(variant)) => variant,
|
|
_ => bug!("expected variant, found {}", self.node_to_string(id)),
|
|
}
|
|
}
|
|
|
|
pub fn expect_foreign_item(&self, id: HirId) -> &'hir ForeignItem {
|
|
match self.find(id) {
|
|
Some(Node::ForeignItem(item)) => item,
|
|
_ => bug!("expected foreign item, found {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
pub fn expect_expr(&self, id: HirId) -> &'hir Expr {
|
|
match self.find(id) { // read recorded by find
|
|
Some(Node::Expr(expr)) => expr,
|
|
_ => bug!("expected expr, found {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
pub fn name(&self, id: HirId) -> Name {
|
|
match self.get(id) {
|
|
Node::Item(i) => i.ident.name,
|
|
Node::ForeignItem(fi) => fi.ident.name,
|
|
Node::ImplItem(ii) => ii.ident.name,
|
|
Node::TraitItem(ti) => ti.ident.name,
|
|
Node::Variant(v) => v.ident.name,
|
|
Node::Field(f) => f.ident.name,
|
|
Node::Lifetime(lt) => lt.name.ident().name,
|
|
Node::GenericParam(param) => param.name.ident().name,
|
|
Node::Binding(&Pat { kind: PatKind::Binding(_, _, l, _), .. }) => l.name,
|
|
Node::Ctor(..) => self.name(self.get_parent_item(id)),
|
|
_ => bug!("no name for {}", self.node_to_string(id))
|
|
}
|
|
}
|
|
|
|
/// Given a node ID, gets a list of attributes associated with the AST
|
|
/// corresponding to the node-ID.
|
|
pub fn attrs(&self, id: HirId) -> &'hir [ast::Attribute] {
|
|
self.read(id); // reveals attributes on the node
|
|
let attrs = match self.find_entry(id).map(|entry| entry.node) {
|
|
Some(Node::Param(a)) => Some(&a.attrs[..]),
|
|
Some(Node::Local(l)) => Some(&l.attrs[..]),
|
|
Some(Node::Item(i)) => Some(&i.attrs[..]),
|
|
Some(Node::ForeignItem(fi)) => Some(&fi.attrs[..]),
|
|
Some(Node::TraitItem(ref ti)) => Some(&ti.attrs[..]),
|
|
Some(Node::ImplItem(ref ii)) => Some(&ii.attrs[..]),
|
|
Some(Node::Variant(ref v)) => Some(&v.attrs[..]),
|
|
Some(Node::Field(ref f)) => Some(&f.attrs[..]),
|
|
Some(Node::Expr(ref e)) => Some(&*e.attrs),
|
|
Some(Node::Stmt(ref s)) => Some(s.kind.attrs()),
|
|
Some(Node::Arm(ref a)) => Some(&*a.attrs),
|
|
Some(Node::GenericParam(param)) => Some(¶m.attrs[..]),
|
|
// Unit/tuple structs/variants take the attributes straight from
|
|
// the struct/variant definition.
|
|
Some(Node::Ctor(..)) => return self.attrs(self.get_parent_item(id)),
|
|
Some(Node::Crate) => Some(&self.forest.krate.attrs[..]),
|
|
_ => None
|
|
};
|
|
attrs.unwrap_or(&[])
|
|
}
|
|
|
|
/// Returns an iterator that yields all the hir ids in the map.
|
|
fn all_ids<'a>(&'a self) -> impl Iterator<Item = HirId> + 'a {
|
|
// This code is a bit awkward because the map is implemented as 2 levels of arrays,
|
|
// see the comment on `HirEntryMap`.
|
|
// Iterate over all the indices and return a reference to
|
|
// local maps and their index given that they exist.
|
|
self.map.iter().enumerate().filter_map(|(i, local_map)| {
|
|
local_map.as_ref().map(|m| (i, m))
|
|
}).flat_map(move |(array_index, local_map)| {
|
|
// Iterate over each valid entry in the local map.
|
|
local_map.iter_enumerated().filter_map(move |(i, entry)| entry.map(move |_| {
|
|
// Reconstruct the `HirId` based on the 3 indices we used to find it.
|
|
HirId {
|
|
owner: DefIndex::from(array_index),
|
|
local_id: i,
|
|
}
|
|
}))
|
|
})
|
|
}
|
|
|
|
/// Returns an iterator that yields the node id's with paths that
|
|
/// match `parts`. (Requires `parts` is non-empty.)
|
|
///
|
|
/// For example, if given `parts` equal to `["bar", "quux"]`, then
|
|
/// the iterator will produce node id's for items with paths
|
|
/// such as `foo::bar::quux`, `bar::quux`, `other::bar::quux`, and
|
|
/// any other such items it can find in the map.
|
|
pub fn nodes_matching_suffix<'a>(&'a self, parts: &'a [String])
|
|
-> impl Iterator<Item = NodeId> + 'a {
|
|
let nodes = NodesMatchingSuffix {
|
|
map: self,
|
|
item_name: parts.last().unwrap(),
|
|
in_which: &parts[..parts.len() - 1],
|
|
};
|
|
|
|
self.all_ids().filter(move |hir| nodes.matches_suffix(*hir)).map(move |hir| {
|
|
self.hir_to_node_id(hir)
|
|
})
|
|
}
|
|
|
|
pub fn span(&self, hir_id: HirId) -> Span {
|
|
self.read(hir_id); // reveals span from node
|
|
match self.find_entry(hir_id).map(|entry| entry.node) {
|
|
Some(Node::Param(param)) => param.span,
|
|
Some(Node::Item(item)) => item.span,
|
|
Some(Node::ForeignItem(foreign_item)) => foreign_item.span,
|
|
Some(Node::TraitItem(trait_method)) => trait_method.span,
|
|
Some(Node::ImplItem(impl_item)) => impl_item.span,
|
|
Some(Node::Variant(variant)) => variant.span,
|
|
Some(Node::Field(field)) => field.span,
|
|
Some(Node::AnonConst(constant)) => self.body(constant.body).value.span,
|
|
Some(Node::Expr(expr)) => expr.span,
|
|
Some(Node::Stmt(stmt)) => stmt.span,
|
|
Some(Node::PathSegment(seg)) => seg.ident.span,
|
|
Some(Node::Ty(ty)) => ty.span,
|
|
Some(Node::TraitRef(tr)) => tr.path.span,
|
|
Some(Node::Binding(pat)) => pat.span,
|
|
Some(Node::Pat(pat)) => pat.span,
|
|
Some(Node::Arm(arm)) => arm.span,
|
|
Some(Node::Block(block)) => block.span,
|
|
Some(Node::Ctor(..)) => match self.find(
|
|
self.get_parent_node(hir_id))
|
|
{
|
|
Some(Node::Item(item)) => item.span,
|
|
Some(Node::Variant(variant)) => variant.span,
|
|
_ => unreachable!(),
|
|
}
|
|
Some(Node::Lifetime(lifetime)) => lifetime.span,
|
|
Some(Node::GenericParam(param)) => param.span,
|
|
Some(Node::Visibility(&Spanned {
|
|
node: VisibilityKind::Restricted { ref path, .. }, ..
|
|
})) => path.span,
|
|
Some(Node::Visibility(v)) => bug!("unexpected Visibility {:?}", v),
|
|
Some(Node::Local(local)) => local.span,
|
|
Some(Node::MacroDef(macro_def)) => macro_def.span,
|
|
Some(Node::Crate) => self.forest.krate.span,
|
|
None => bug!("hir::map::Map::span: id not in map: {:?}", hir_id),
|
|
}
|
|
}
|
|
|
|
pub fn span_if_local(&self, id: DefId) -> Option<Span> {
|
|
self.as_local_hir_id(id).map(|id| self.span(id))
|
|
}
|
|
|
|
pub fn res_span(&self, res: Res) -> Option<Span> {
|
|
match res {
|
|
Res::Err => None,
|
|
Res::Local(id) => Some(self.span(id)),
|
|
res => self.span_if_local(res.opt_def_id()?),
|
|
}
|
|
}
|
|
|
|
pub fn node_to_string(&self, id: HirId) -> String {
|
|
hir_id_to_string(self, id, true)
|
|
}
|
|
|
|
pub fn hir_to_user_string(&self, id: HirId) -> String {
|
|
hir_id_to_string(self, id, false)
|
|
}
|
|
|
|
pub fn hir_to_pretty_string(&self, id: HirId) -> String {
|
|
print::to_string(self, |s| s.print_node(self.get(id)))
|
|
}
|
|
}
|
|
|
|
pub struct NodesMatchingSuffix<'a> {
|
|
map: &'a Map<'a>,
|
|
item_name: &'a String,
|
|
in_which: &'a [String],
|
|
}
|
|
|
|
impl<'a> NodesMatchingSuffix<'a> {
|
|
/// Returns `true` only if some suffix of the module path for parent
|
|
/// matches `self.in_which`.
|
|
///
|
|
/// In other words: let `[x_0,x_1,...,x_k]` be `self.in_which`;
|
|
/// returns true if parent's path ends with the suffix
|
|
/// `x_0::x_1::...::x_k`.
|
|
fn suffix_matches(&self, parent: HirId) -> bool {
|
|
let mut cursor = parent;
|
|
for part in self.in_which.iter().rev() {
|
|
let (mod_id, mod_name) = match find_first_mod_parent(self.map, cursor) {
|
|
None => return false,
|
|
Some((node_id, name)) => (node_id, name),
|
|
};
|
|
if mod_name.as_str() != *part {
|
|
return false;
|
|
}
|
|
cursor = self.map.get_parent_item(mod_id);
|
|
}
|
|
return true;
|
|
|
|
// Finds the first mod in parent chain for `id`, along with
|
|
// that mod's name.
|
|
//
|
|
// If `id` itself is a mod named `m` with parent `p`, then
|
|
// returns `Some(id, m, p)`. If `id` has no mod in its parent
|
|
// chain, then returns `None`.
|
|
fn find_first_mod_parent(map: &Map<'_>, mut id: HirId) -> Option<(HirId, Name)> {
|
|
loop {
|
|
if let Node::Item(item) = map.find(id)? {
|
|
if item_is_mod(&item) {
|
|
return Some((id, item.ident.name))
|
|
}
|
|
}
|
|
let parent = map.get_parent_item(id);
|
|
if parent == id { return None }
|
|
id = parent;
|
|
}
|
|
|
|
fn item_is_mod(item: &Item) -> bool {
|
|
match item.kind {
|
|
ItemKind::Mod(_) => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// We are looking at some node `n` with a given name and parent
|
|
// id; do their names match what I am seeking?
|
|
fn matches_names(&self, parent_of_n: HirId, name: Name) -> bool {
|
|
name.as_str() == *self.item_name && self.suffix_matches(parent_of_n)
|
|
}
|
|
|
|
fn matches_suffix(&self, hir: HirId) -> bool {
|
|
let name = match self.map.find_entry(hir).map(|entry| entry.node) {
|
|
Some(Node::Item(n)) => n.name(),
|
|
Some(Node::ForeignItem(n)) => n.name(),
|
|
Some(Node::TraitItem(n)) => n.name(),
|
|
Some(Node::ImplItem(n)) => n.name(),
|
|
Some(Node::Variant(n)) => n.name(),
|
|
Some(Node::Field(n)) => n.name(),
|
|
_ => return false,
|
|
};
|
|
self.matches_names(self.map.get_parent_item(hir), name)
|
|
}
|
|
}
|
|
|
|
trait Named {
|
|
fn name(&self) -> Name;
|
|
}
|
|
|
|
impl<T:Named> Named for Spanned<T> { fn name(&self) -> Name { self.node.name() } }
|
|
|
|
impl Named for Item { fn name(&self) -> Name { self.ident.name } }
|
|
impl Named for ForeignItem { fn name(&self) -> Name { self.ident.name } }
|
|
impl Named for Variant { fn name(&self) -> Name { self.ident.name } }
|
|
impl Named for StructField { fn name(&self) -> Name { self.ident.name } }
|
|
impl Named for TraitItem { fn name(&self) -> Name { self.ident.name } }
|
|
impl Named for ImplItem { fn name(&self) -> Name { self.ident.name } }
|
|
|
|
pub fn map_crate<'hir>(sess: &crate::session::Session,
|
|
cstore: &CrateStoreDyn,
|
|
forest: &'hir Forest,
|
|
definitions: &'hir Definitions)
|
|
-> Map<'hir> {
|
|
// Build the reverse mapping of `node_to_hir_id`.
|
|
let hir_to_node_id = definitions.node_to_hir_id.iter_enumerated()
|
|
.map(|(node_id, &hir_id)| (hir_id, node_id)).collect();
|
|
|
|
let (map, crate_hash) = {
|
|
let hcx = crate::ich::StableHashingContext::new(sess, &forest.krate, definitions, cstore);
|
|
|
|
let mut collector = NodeCollector::root(sess,
|
|
&forest.krate,
|
|
&forest.dep_graph,
|
|
&definitions,
|
|
&hir_to_node_id,
|
|
hcx);
|
|
intravisit::walk_crate(&mut collector, &forest.krate);
|
|
|
|
let crate_disambiguator = sess.local_crate_disambiguator();
|
|
let cmdline_args = sess.opts.dep_tracking_hash();
|
|
collector.finalize_and_compute_crate_hash(
|
|
crate_disambiguator,
|
|
cstore,
|
|
cmdline_args
|
|
)
|
|
};
|
|
|
|
let map = Map {
|
|
forest,
|
|
dep_graph: forest.dep_graph.clone(),
|
|
crate_hash,
|
|
map,
|
|
hir_to_node_id,
|
|
definitions,
|
|
};
|
|
|
|
time(sess, "validate HIR map", || {
|
|
hir_id_validator::check_crate(&map);
|
|
});
|
|
|
|
map
|
|
}
|
|
|
|
/// Identical to the `PpAnn` implementation for `hir::Crate`,
|
|
/// except it avoids creating a dependency on the whole crate.
|
|
impl<'hir> print::PpAnn for Map<'hir> {
|
|
fn nested(&self, state: &mut print::State<'_>, nested: print::Nested) {
|
|
match nested {
|
|
Nested::Item(id) => state.print_item(self.expect_item(id.id)),
|
|
Nested::TraitItem(id) => state.print_trait_item(self.trait_item(id)),
|
|
Nested::ImplItem(id) => state.print_impl_item(self.impl_item(id)),
|
|
Nested::Body(id) => state.print_expr(&self.body(id).value),
|
|
Nested::BodyParamPat(id, i) => state.print_pat(&self.body(id).params[i].pat)
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> print::State<'a> {
|
|
pub fn print_node(&mut self, node: Node<'_>) {
|
|
match node {
|
|
Node::Param(a) => self.print_param(&a),
|
|
Node::Item(a) => self.print_item(&a),
|
|
Node::ForeignItem(a) => self.print_foreign_item(&a),
|
|
Node::TraitItem(a) => self.print_trait_item(a),
|
|
Node::ImplItem(a) => self.print_impl_item(a),
|
|
Node::Variant(a) => self.print_variant(&a),
|
|
Node::AnonConst(a) => self.print_anon_const(&a),
|
|
Node::Expr(a) => self.print_expr(&a),
|
|
Node::Stmt(a) => self.print_stmt(&a),
|
|
Node::PathSegment(a) => self.print_path_segment(&a),
|
|
Node::Ty(a) => self.print_type(&a),
|
|
Node::TraitRef(a) => self.print_trait_ref(&a),
|
|
Node::Binding(a) |
|
|
Node::Pat(a) => self.print_pat(&a),
|
|
Node::Arm(a) => self.print_arm(&a),
|
|
Node::Block(a) => {
|
|
// Containing cbox, will be closed by print-block at `}`.
|
|
self.cbox(print::INDENT_UNIT);
|
|
// Head-ibox, will be closed by print-block after `{`.
|
|
self.ibox(0);
|
|
self.print_block(&a)
|
|
}
|
|
Node::Lifetime(a) => self.print_lifetime(&a),
|
|
Node::Visibility(a) => self.print_visibility(&a),
|
|
Node::GenericParam(_) => bug!("cannot print Node::GenericParam"),
|
|
Node::Field(_) => bug!("cannot print StructField"),
|
|
// These cases do not carry enough information in the
|
|
// `hir_map` to reconstruct their full structure for pretty
|
|
// printing.
|
|
Node::Ctor(..) => bug!("cannot print isolated Ctor"),
|
|
Node::Local(a) => self.print_local_decl(&a),
|
|
Node::MacroDef(_) => bug!("cannot print MacroDef"),
|
|
Node::Crate => bug!("cannot print Crate"),
|
|
}
|
|
}
|
|
}
|
|
|
|
fn hir_id_to_string(map: &Map<'_>, id: HirId, include_id: bool) -> String {
|
|
let id_str = format!(" (hir_id={})", id);
|
|
let id_str = if include_id { &id_str[..] } else { "" };
|
|
|
|
let path_str = || {
|
|
// This functionality is used for debugging, try to use `TyCtxt` to get
|
|
// the user-friendly path, otherwise fall back to stringifying `DefPath`.
|
|
crate::ty::tls::with_opt(|tcx| {
|
|
if let Some(tcx) = tcx {
|
|
let def_id = map.local_def_id(id);
|
|
tcx.def_path_str(def_id)
|
|
} else if let Some(path) = map.def_path_from_hir_id(id) {
|
|
path.data.into_iter().map(|elem| {
|
|
elem.data.to_string()
|
|
}).collect::<Vec<_>>().join("::")
|
|
} else {
|
|
String::from("<missing path>")
|
|
}
|
|
})
|
|
};
|
|
|
|
match map.find(id) {
|
|
Some(Node::Item(item)) => {
|
|
let item_str = match item.kind {
|
|
ItemKind::ExternCrate(..) => "extern crate",
|
|
ItemKind::Use(..) => "use",
|
|
ItemKind::Static(..) => "static",
|
|
ItemKind::Const(..) => "const",
|
|
ItemKind::Fn(..) => "fn",
|
|
ItemKind::Mod(..) => "mod",
|
|
ItemKind::ForeignMod(..) => "foreign mod",
|
|
ItemKind::GlobalAsm(..) => "global asm",
|
|
ItemKind::TyAlias(..) => "ty",
|
|
ItemKind::OpaqueTy(..) => "opaque type",
|
|
ItemKind::Enum(..) => "enum",
|
|
ItemKind::Struct(..) => "struct",
|
|
ItemKind::Union(..) => "union",
|
|
ItemKind::Trait(..) => "trait",
|
|
ItemKind::TraitAlias(..) => "trait alias",
|
|
ItemKind::Impl(..) => "impl",
|
|
};
|
|
format!("{} {}{}", item_str, path_str(), id_str)
|
|
}
|
|
Some(Node::ForeignItem(_)) => {
|
|
format!("foreign item {}{}", path_str(), id_str)
|
|
}
|
|
Some(Node::ImplItem(ii)) => {
|
|
match ii.kind {
|
|
ImplItemKind::Const(..) => {
|
|
format!("assoc const {} in {}{}", ii.ident, path_str(), id_str)
|
|
}
|
|
ImplItemKind::Method(..) => {
|
|
format!("method {} in {}{}", ii.ident, path_str(), id_str)
|
|
}
|
|
ImplItemKind::TyAlias(_) => {
|
|
format!("assoc type {} in {}{}", ii.ident, path_str(), id_str)
|
|
}
|
|
ImplItemKind::OpaqueTy(_) => {
|
|
format!("assoc opaque type {} in {}{}", ii.ident, path_str(), id_str)
|
|
}
|
|
}
|
|
}
|
|
Some(Node::TraitItem(ti)) => {
|
|
let kind = match ti.kind {
|
|
TraitItemKind::Const(..) => "assoc constant",
|
|
TraitItemKind::Method(..) => "trait method",
|
|
TraitItemKind::Type(..) => "assoc type",
|
|
};
|
|
|
|
format!("{} {} in {}{}", kind, ti.ident, path_str(), id_str)
|
|
}
|
|
Some(Node::Variant(ref variant)) => {
|
|
format!("variant {} in {}{}",
|
|
variant.ident,
|
|
path_str(), id_str)
|
|
}
|
|
Some(Node::Field(ref field)) => {
|
|
format!("field {} in {}{}",
|
|
field.ident,
|
|
path_str(), id_str)
|
|
}
|
|
Some(Node::AnonConst(_)) => {
|
|
format!("const {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Expr(_)) => {
|
|
format!("expr {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Stmt(_)) => {
|
|
format!("stmt {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::PathSegment(_)) => {
|
|
format!("path segment {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Ty(_)) => {
|
|
format!("type {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::TraitRef(_)) => {
|
|
format!("trait_ref {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Binding(_)) => {
|
|
format!("local {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Pat(_)) => {
|
|
format!("pat {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Param(_)) => {
|
|
format!("param {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Arm(_)) => {
|
|
format!("arm {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Block(_)) => {
|
|
format!("block {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Local(_)) => {
|
|
format!("local {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::Ctor(..)) => {
|
|
format!("ctor {}{}", path_str(), id_str)
|
|
}
|
|
Some(Node::Lifetime(_)) => {
|
|
format!("lifetime {}{}", map.hir_to_pretty_string(id), id_str)
|
|
}
|
|
Some(Node::GenericParam(ref param)) => {
|
|
format!("generic_param {:?}{}", param, id_str)
|
|
}
|
|
Some(Node::Visibility(ref vis)) => {
|
|
format!("visibility {:?}{}", vis, id_str)
|
|
}
|
|
Some(Node::MacroDef(_)) => {
|
|
format!("macro {}{}", path_str(), id_str)
|
|
}
|
|
Some(Node::Crate) => String::from("root_crate"),
|
|
None => format!("unknown node{}", id_str),
|
|
}
|
|
}
|
|
|
|
pub fn provide(providers: &mut Providers<'_>) {
|
|
providers.def_kind = |tcx, def_id| {
|
|
if let Some(hir_id) = tcx.hir().as_local_hir_id(def_id) {
|
|
tcx.hir().def_kind(hir_id)
|
|
} else {
|
|
bug!("calling local def_kind query provider for upstream DefId: {:?}",
|
|
def_id
|
|
);
|
|
}
|
|
};
|
|
}
|