Rollup merge of #67178 - GuillaumeGomez:move-non-clean-impls, r=kinnison
Move non clean impls items This is another (and should be the last for the `clean` module) rustdoc cleanup. I tried to follow the same commit pattern as the last one to make the review as easy as possible. r? @kinnison
This commit is contained in:
Yuki Okushi
GitHub
commit
5a2af97e77
@ -1,10 +1,24 @@
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use rustc::hir;
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use rustc::traits::auto_trait::{self, AutoTraitResult};
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use rustc::ty::{self, TypeFoldable};
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use rustc::ty::{self, Region, RegionVid, TypeFoldable};
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use rustc::util::nodemap::FxHashSet;
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use std::fmt::Debug;
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use super::*;
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#[derive(Eq, PartialEq, Hash, Copy, Clone, Debug)]
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enum RegionTarget<'tcx> {
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Region(Region<'tcx>),
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RegionVid(RegionVid)
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}
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#[derive(Default, Debug, Clone)]
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struct RegionDeps<'tcx> {
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larger: FxHashSet<RegionTarget<'tcx>>,
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smaller: FxHashSet<RegionTarget<'tcx>>
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}
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pub struct AutoTraitFinder<'a, 'tcx> {
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pub cx: &'a core::DocContext<'tcx>,
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pub f: auto_trait::AutoTraitFinder<'tcx>,
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@ -1,10 +1,9 @@
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// ignore-tidy-filelength
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//! This module contains the "cleaned" pieces of the AST, and the functions
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//! that clean them.
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pub mod inline;
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pub mod cfg;
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pub mod utils;
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mod auto_trait;
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mod blanket_impl;
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mod simplify;
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@ -19,15 +18,15 @@ use rustc::middle::stability;
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use rustc::mir::interpret::GlobalId;
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use rustc::hir;
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use rustc::hir::def::{CtorKind, DefKind, Res};
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use rustc::hir::def_id::{CrateNum, DefId, CRATE_DEF_INDEX, LOCAL_CRATE};
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use rustc::hir::def_id::{CrateNum, DefId, CRATE_DEF_INDEX};
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use rustc::hir::ptr::P;
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use rustc::ty::subst::{InternalSubsts, SubstsRef, GenericArgKind};
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use rustc::ty::{self, DefIdTree, TyCtxt, Region, RegionVid, Ty, AdtKind};
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use rustc::ty::subst::InternalSubsts;
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use rustc::ty::{self, TyCtxt, Ty, AdtKind};
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use rustc::ty::fold::TypeFolder;
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use rustc::util::nodemap::{FxHashMap, FxHashSet};
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use syntax::ast::{self, Ident};
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use syntax::attr;
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use syntax_pos::symbol::{Symbol, kw, sym};
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use syntax_pos::symbol::{kw, sym};
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use syntax_pos::hygiene::MacroKind;
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use syntax_pos::{self, Pos};
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@ -41,8 +40,9 @@ use std::u32;
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use crate::core::{self, DocContext, ImplTraitParam};
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use crate::doctree;
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use self::auto_trait::AutoTraitFinder;
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use self::blanket_impl::BlanketImplFinder;
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use utils::*;
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pub use utils::{get_auto_trait_and_blanket_impls, krate, register_res};
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pub use self::types::*;
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pub use self::types::Type::*;
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@ -54,15 +54,6 @@ pub use self::types::Visibility::{Public, Inherited};
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const FN_OUTPUT_NAME: &'static str = "Output";
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// extract the stability index for a node from tcx, if possible
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fn get_stability(cx: &DocContext<'_>, def_id: DefId) -> Option<Stability> {
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cx.tcx.lookup_stability(def_id).clean(cx)
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}
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fn get_deprecation(cx: &DocContext<'_>, def_id: DefId) -> Option<Deprecation> {
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cx.tcx.lookup_deprecation(def_id).clean(cx)
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}
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pub trait Clean<T> {
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fn clean(&self, cx: &DocContext<'_>) -> T;
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}
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@ -109,91 +100,6 @@ impl<T: Clean<U>, U> Clean<Vec<U>> for P<[T]> {
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}
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}
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pub fn krate(mut cx: &mut DocContext<'_>) -> Crate {
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use crate::visit_lib::LibEmbargoVisitor;
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let krate = cx.tcx.hir().krate();
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let module = crate::visit_ast::RustdocVisitor::new(&mut cx).visit(krate);
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let mut r = cx.renderinfo.get_mut();
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r.deref_trait_did = cx.tcx.lang_items().deref_trait();
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r.deref_mut_trait_did = cx.tcx.lang_items().deref_mut_trait();
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r.owned_box_did = cx.tcx.lang_items().owned_box();
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let mut externs = Vec::new();
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for &cnum in cx.tcx.crates().iter() {
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externs.push((cnum, cnum.clean(cx)));
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// Analyze doc-reachability for extern items
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LibEmbargoVisitor::new(&mut cx).visit_lib(cnum);
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}
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externs.sort_by(|&(a, _), &(b, _)| a.cmp(&b));
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// Clean the crate, translating the entire libsyntax AST to one that is
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// understood by rustdoc.
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let mut module = module.clean(cx);
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let mut masked_crates = FxHashSet::default();
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match module.inner {
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ModuleItem(ref module) => {
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for it in &module.items {
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// `compiler_builtins` should be masked too, but we can't apply
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// `#[doc(masked)]` to the injected `extern crate` because it's unstable.
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if it.is_extern_crate()
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&& (it.attrs.has_doc_flag(sym::masked)
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|| cx.tcx.is_compiler_builtins(it.def_id.krate))
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{
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masked_crates.insert(it.def_id.krate);
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}
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}
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}
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_ => unreachable!(),
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}
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let ExternalCrate { name, src, primitives, keywords, .. } = LOCAL_CRATE.clean(cx);
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{
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let m = match module.inner {
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ModuleItem(ref mut m) => m,
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_ => unreachable!(),
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};
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m.items.extend(primitives.iter().map(|&(def_id, prim, ref attrs)| {
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Item {
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source: Span::empty(),
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name: Some(prim.to_url_str().to_string()),
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attrs: attrs.clone(),
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visibility: Public,
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stability: get_stability(cx, def_id),
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deprecation: get_deprecation(cx, def_id),
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def_id,
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inner: PrimitiveItem(prim),
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}
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}));
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m.items.extend(keywords.into_iter().map(|(def_id, kw, attrs)| {
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Item {
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source: Span::empty(),
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name: Some(kw.clone()),
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attrs,
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visibility: Public,
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stability: get_stability(cx, def_id),
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deprecation: get_deprecation(cx, def_id),
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def_id,
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inner: KeywordItem(kw),
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}
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}));
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}
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Crate {
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name,
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version: None,
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src,
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module: Some(module),
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externs,
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primitives,
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external_traits: cx.external_traits.clone(),
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masked_crates,
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collapsed: false,
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}
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}
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impl Clean<ExternalCrate> for CrateNum {
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fn clean(&self, cx: &DocContext<'_>) -> ExternalCrate {
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let root = DefId { krate: *self, index: CRATE_DEF_INDEX };
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@ -394,66 +300,6 @@ impl Clean<GenericBound> for hir::GenericBound {
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}
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}
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fn external_generic_args(
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cx: &DocContext<'_>,
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trait_did: Option<DefId>,
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has_self: bool,
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bindings: Vec<TypeBinding>,
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substs: SubstsRef<'_>,
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) -> GenericArgs {
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let mut skip_self = has_self;
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let mut ty_kind = None;
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let args: Vec<_> = substs.iter().filter_map(|kind| match kind.unpack() {
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GenericArgKind::Lifetime(lt) => {
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lt.clean(cx).and_then(|lt| Some(GenericArg::Lifetime(lt)))
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}
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GenericArgKind::Type(_) if skip_self => {
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skip_self = false;
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None
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}
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GenericArgKind::Type(ty) => {
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ty_kind = Some(&ty.kind);
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Some(GenericArg::Type(ty.clean(cx)))
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}
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GenericArgKind::Const(ct) => Some(GenericArg::Const(ct.clean(cx))),
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}).collect();
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match trait_did {
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// Attempt to sugar an external path like Fn<(A, B,), C> to Fn(A, B) -> C
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Some(did) if cx.tcx.lang_items().fn_trait_kind(did).is_some() => {
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assert!(ty_kind.is_some());
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let inputs = match ty_kind {
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Some(ty::Tuple(ref tys)) => tys.iter().map(|t| t.expect_ty().clean(cx)).collect(),
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_ => return GenericArgs::AngleBracketed { args, bindings },
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};
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let output = None;
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// FIXME(#20299) return type comes from a projection now
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// match types[1].kind {
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// ty::Tuple(ref v) if v.is_empty() => None, // -> ()
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// _ => Some(types[1].clean(cx))
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// };
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GenericArgs::Parenthesized { inputs, output }
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},
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_ => {
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GenericArgs::AngleBracketed { args, bindings }
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}
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}
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}
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// trait_did should be set to a trait's DefId if called on a TraitRef, in order to sugar
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// from Fn<(A, B,), C> to Fn(A, B) -> C
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fn external_path(cx: &DocContext<'_>, name: Symbol, trait_did: Option<DefId>, has_self: bool,
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bindings: Vec<TypeBinding>, substs: SubstsRef<'_>) -> Path {
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Path {
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global: false,
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res: Res::Err,
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segments: vec![PathSegment {
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name: name.to_string(),
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args: external_generic_args(cx, trait_did, has_self, bindings, substs)
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}],
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}
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}
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impl<'a, 'tcx> Clean<GenericBound> for (&'a ty::TraitRef<'tcx>, Vec<TypeBinding>) {
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fn clean(&self, cx: &DocContext<'_>) -> GenericBound {
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let (trait_ref, ref bounds) = *self;
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@ -1036,118 +882,6 @@ impl<'a, 'tcx> Clean<Generics> for (&'a ty::Generics, ty::GenericPredicates<'tcx
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}
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}
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/// The point of this function is to replace bounds with types.
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///
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/// i.e. `[T, U]` when you have the following bounds: `T: Display, U: Option<T>` will return
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/// `[Display, Option]` (we just returns the list of the types, we don't care about the
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/// wrapped types in here).
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fn get_real_types(
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generics: &Generics,
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arg: &Type,
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cx: &DocContext<'_>,
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recurse: i32,
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) -> FxHashSet<Type> {
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let arg_s = arg.print().to_string();
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let mut res = FxHashSet::default();
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if recurse >= 10 { // FIXME: remove this whole recurse thing when the recursion bug is fixed
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return res;
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}
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if arg.is_full_generic() {
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if let Some(where_pred) = generics.where_predicates.iter().find(|g| {
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match g {
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&WherePredicate::BoundPredicate { ref ty, .. } => ty.def_id() == arg.def_id(),
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_ => false,
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}
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}) {
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let bounds = where_pred.get_bounds().unwrap_or_else(|| &[]);
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for bound in bounds.iter() {
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match *bound {
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GenericBound::TraitBound(ref poly_trait, _) => {
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for x in poly_trait.generic_params.iter() {
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if !x.is_type() {
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continue
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}
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if let Some(ty) = x.get_type() {
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let adds = get_real_types(generics, &ty, cx, recurse + 1);
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if !adds.is_empty() {
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res.extend(adds);
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} else if !ty.is_full_generic() {
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res.insert(ty);
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}
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}
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}
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}
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_ => {}
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}
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}
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}
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if let Some(bound) = generics.params.iter().find(|g| {
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g.is_type() && g.name == arg_s
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}) {
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for bound in bound.get_bounds().unwrap_or_else(|| &[]) {
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if let Some(ty) = bound.get_trait_type() {
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let adds = get_real_types(generics, &ty, cx, recurse + 1);
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if !adds.is_empty() {
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res.extend(adds);
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} else if !ty.is_full_generic() {
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res.insert(ty.clone());
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}
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}
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}
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}
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} else {
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res.insert(arg.clone());
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if let Some(gens) = arg.generics() {
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for gen in gens.iter() {
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if gen.is_full_generic() {
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let adds = get_real_types(generics, gen, cx, recurse + 1);
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if !adds.is_empty() {
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res.extend(adds);
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}
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} else {
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res.insert(gen.clone());
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}
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}
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}
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}
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res
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}
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/// Return the full list of types when bounds have been resolved.
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///
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/// i.e. `fn foo<A: Display, B: Option<A>>(x: u32, y: B)` will return
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/// `[u32, Display, Option]`.
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pub fn get_all_types(
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generics: &Generics,
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decl: &FnDecl,
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cx: &DocContext<'_>,
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) -> (Vec<Type>, Vec<Type>) {
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let mut all_types = FxHashSet::default();
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for arg in decl.inputs.values.iter() {
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if arg.type_.is_self_type() {
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continue;
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}
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let args = get_real_types(generics, &arg.type_, cx, 0);
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if !args.is_empty() {
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all_types.extend(args);
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} else {
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all_types.insert(arg.type_.clone());
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}
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}
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let ret_types = match decl.output {
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FunctionRetTy::Return(ref return_type) => {
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let mut ret = get_real_types(generics, &return_type, cx, 0);
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if ret.is_empty() {
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ret.insert(return_type.clone());
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}
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ret.into_iter().collect()
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}
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_ => Vec::new(),
|
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};
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(all_types.into_iter().collect(), ret_types)
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}
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|
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impl<'a> Clean<Method> for (&'a hir::FnSig, &'a hir::Generics, hir::BodyId,
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Option<hir::Defaultness>) {
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fn clean(&self, cx: &DocContext<'_>) -> Method {
|
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@ -2262,66 +1996,6 @@ impl Clean<PathSegment> for hir::PathSegment {
|
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}
|
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}
|
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|
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fn strip_type(ty: Type) -> Type {
|
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match ty {
|
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Type::ResolvedPath { path, param_names, did, is_generic } => {
|
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Type::ResolvedPath { path: strip_path(&path), param_names, did, is_generic }
|
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}
|
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Type::Tuple(inner_tys) => {
|
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Type::Tuple(inner_tys.iter().map(|t| strip_type(t.clone())).collect())
|
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}
|
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Type::Slice(inner_ty) => Type::Slice(Box::new(strip_type(*inner_ty))),
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Type::Array(inner_ty, s) => Type::Array(Box::new(strip_type(*inner_ty)), s),
|
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Type::RawPointer(m, inner_ty) => Type::RawPointer(m, Box::new(strip_type(*inner_ty))),
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Type::BorrowedRef { lifetime, mutability, type_ } => {
|
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Type::BorrowedRef { lifetime, mutability, type_: Box::new(strip_type(*type_)) }
|
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}
|
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Type::QPath { name, self_type, trait_ } => {
|
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Type::QPath {
|
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name,
|
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self_type: Box::new(strip_type(*self_type)), trait_: Box::new(strip_type(*trait_))
|
||||
}
|
||||
}
|
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_ => ty
|
||||
}
|
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}
|
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|
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fn strip_path(path: &Path) -> Path {
|
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let segments = path.segments.iter().map(|s| {
|
||||
PathSegment {
|
||||
name: s.name.clone(),
|
||||
args: GenericArgs::AngleBracketed {
|
||||
args: vec![],
|
||||
bindings: vec![],
|
||||
}
|
||||
}
|
||||
}).collect();
|
||||
|
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Path {
|
||||
global: path.global,
|
||||
res: path.res.clone(),
|
||||
segments,
|
||||
}
|
||||
}
|
||||
|
||||
fn qpath_to_string(p: &hir::QPath) -> String {
|
||||
let segments = match *p {
|
||||
hir::QPath::Resolved(_, ref path) => &path.segments,
|
||||
hir::QPath::TypeRelative(_, ref segment) => return segment.ident.to_string(),
|
||||
};
|
||||
|
||||
let mut s = String::new();
|
||||
for (i, seg) in segments.iter().enumerate() {
|
||||
if i > 0 {
|
||||
s.push_str("::");
|
||||
}
|
||||
if seg.ident.name != kw::PathRoot {
|
||||
s.push_str(&seg.ident.as_str());
|
||||
}
|
||||
}
|
||||
s
|
||||
}
|
||||
|
||||
impl Clean<String> for Ident {
|
||||
#[inline]
|
||||
fn clean(&self, cx: &DocContext<'_>) -> String {
|
||||
@ -2444,15 +2118,6 @@ impl Clean<ImplPolarity> for ty::ImplPolarity {
|
||||
}
|
||||
}
|
||||
|
||||
pub fn get_auto_trait_and_blanket_impls(
|
||||
cx: &DocContext<'tcx>,
|
||||
ty: Ty<'tcx>,
|
||||
param_env_def_id: DefId,
|
||||
) -> impl Iterator<Item = Item> {
|
||||
AutoTraitFinder::new(cx).get_auto_trait_impls(ty, param_env_def_id).into_iter()
|
||||
.chain(BlanketImplFinder::new(cx).get_blanket_impls(ty, param_env_def_id))
|
||||
}
|
||||
|
||||
impl Clean<Vec<Item>> for doctree::Impl<'_> {
|
||||
fn clean(&self, cx: &DocContext<'_>) -> Vec<Item> {
|
||||
let mut ret = Vec::new();
|
||||
@ -2497,63 +2162,6 @@ impl Clean<Vec<Item>> for doctree::Impl<'_> {
|
||||
}
|
||||
}
|
||||
|
||||
fn build_deref_target_impls(cx: &DocContext<'_>,
|
||||
items: &[Item],
|
||||
ret: &mut Vec<Item>) {
|
||||
use self::PrimitiveType::*;
|
||||
let tcx = cx.tcx;
|
||||
|
||||
for item in items {
|
||||
let target = match item.inner {
|
||||
TypedefItem(ref t, true) => &t.type_,
|
||||
_ => continue,
|
||||
};
|
||||
let primitive = match *target {
|
||||
ResolvedPath { did, .. } if did.is_local() => continue,
|
||||
ResolvedPath { did, .. } => {
|
||||
ret.extend(inline::build_impls(cx, did, None));
|
||||
continue
|
||||
}
|
||||
_ => match target.primitive_type() {
|
||||
Some(prim) => prim,
|
||||
None => continue,
|
||||
}
|
||||
};
|
||||
let did = match primitive {
|
||||
Isize => tcx.lang_items().isize_impl(),
|
||||
I8 => tcx.lang_items().i8_impl(),
|
||||
I16 => tcx.lang_items().i16_impl(),
|
||||
I32 => tcx.lang_items().i32_impl(),
|
||||
I64 => tcx.lang_items().i64_impl(),
|
||||
I128 => tcx.lang_items().i128_impl(),
|
||||
Usize => tcx.lang_items().usize_impl(),
|
||||
U8 => tcx.lang_items().u8_impl(),
|
||||
U16 => tcx.lang_items().u16_impl(),
|
||||
U32 => tcx.lang_items().u32_impl(),
|
||||
U64 => tcx.lang_items().u64_impl(),
|
||||
U128 => tcx.lang_items().u128_impl(),
|
||||
F32 => tcx.lang_items().f32_impl(),
|
||||
F64 => tcx.lang_items().f64_impl(),
|
||||
Char => tcx.lang_items().char_impl(),
|
||||
Bool => tcx.lang_items().bool_impl(),
|
||||
Str => tcx.lang_items().str_impl(),
|
||||
Slice => tcx.lang_items().slice_impl(),
|
||||
Array => tcx.lang_items().slice_impl(),
|
||||
Tuple => None,
|
||||
Unit => None,
|
||||
RawPointer => tcx.lang_items().const_ptr_impl(),
|
||||
Reference => None,
|
||||
Fn => None,
|
||||
Never => None,
|
||||
};
|
||||
if let Some(did) = did {
|
||||
if !did.is_local() {
|
||||
inline::build_impl(cx, did, None, ret);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl Clean<Vec<Item>> for doctree::ExternCrate<'_> {
|
||||
fn clean(&self, cx: &DocContext<'_>) -> Vec<Item> {
|
||||
|
||||
@ -2710,170 +2318,6 @@ impl Clean<Item> for doctree::ForeignItem<'_> {
|
||||
}
|
||||
}
|
||||
|
||||
// Utilities
|
||||
|
||||
pub trait ToSource {
|
||||
fn to_src(&self, cx: &DocContext<'_>) -> String;
|
||||
}
|
||||
|
||||
impl ToSource for syntax_pos::Span {
|
||||
fn to_src(&self, cx: &DocContext<'_>) -> String {
|
||||
debug!("converting span {:?} to snippet", self.clean(cx));
|
||||
let sn = match cx.sess().source_map().span_to_snippet(*self) {
|
||||
Ok(x) => x,
|
||||
Err(_) => String::new()
|
||||
};
|
||||
debug!("got snippet {}", sn);
|
||||
sn
|
||||
}
|
||||
}
|
||||
|
||||
fn name_from_pat(p: &hir::Pat) -> String {
|
||||
use rustc::hir::*;
|
||||
debug!("trying to get a name from pattern: {:?}", p);
|
||||
|
||||
match p.kind {
|
||||
PatKind::Wild => "_".to_string(),
|
||||
PatKind::Binding(_, _, ident, _) => ident.to_string(),
|
||||
PatKind::TupleStruct(ref p, ..) | PatKind::Path(ref p) => qpath_to_string(p),
|
||||
PatKind::Struct(ref name, ref fields, etc) => {
|
||||
format!("{} {{ {}{} }}", qpath_to_string(name),
|
||||
fields.iter().map(|fp| format!("{}: {}", fp.ident, name_from_pat(&fp.pat)))
|
||||
.collect::<Vec<String>>().join(", "),
|
||||
if etc { ", .." } else { "" }
|
||||
)
|
||||
}
|
||||
PatKind::Or(ref pats) => {
|
||||
pats.iter().map(|p| name_from_pat(&**p)).collect::<Vec<String>>().join(" | ")
|
||||
}
|
||||
PatKind::Tuple(ref elts, _) => format!("({})", elts.iter().map(|p| name_from_pat(&**p))
|
||||
.collect::<Vec<String>>().join(", ")),
|
||||
PatKind::Box(ref p) => name_from_pat(&**p),
|
||||
PatKind::Ref(ref p, _) => name_from_pat(&**p),
|
||||
PatKind::Lit(..) => {
|
||||
warn!("tried to get argument name from PatKind::Lit, \
|
||||
which is silly in function arguments");
|
||||
"()".to_string()
|
||||
},
|
||||
PatKind::Range(..) => panic!("tried to get argument name from PatKind::Range, \
|
||||
which is not allowed in function arguments"),
|
||||
PatKind::Slice(ref begin, ref mid, ref end) => {
|
||||
let begin = begin.iter().map(|p| name_from_pat(&**p));
|
||||
let mid = mid.as_ref().map(|p| format!("..{}", name_from_pat(&**p))).into_iter();
|
||||
let end = end.iter().map(|p| name_from_pat(&**p));
|
||||
format!("[{}]", begin.chain(mid).chain(end).collect::<Vec<_>>().join(", "))
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
fn print_const(cx: &DocContext<'_>, n: &ty::Const<'_>) -> String {
|
||||
match n.val {
|
||||
ty::ConstKind::Unevaluated(def_id, _) => {
|
||||
if let Some(hir_id) = cx.tcx.hir().as_local_hir_id(def_id) {
|
||||
print_const_expr(cx, cx.tcx.hir().body_owned_by(hir_id))
|
||||
} else {
|
||||
inline::print_inlined_const(cx, def_id)
|
||||
}
|
||||
},
|
||||
_ => {
|
||||
let mut s = n.to_string();
|
||||
// array lengths are obviously usize
|
||||
if s.ends_with("usize") {
|
||||
let n = s.len() - "usize".len();
|
||||
s.truncate(n);
|
||||
if s.ends_with(": ") {
|
||||
let n = s.len() - ": ".len();
|
||||
s.truncate(n);
|
||||
}
|
||||
}
|
||||
s
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
fn print_const_expr(cx: &DocContext<'_>, body: hir::BodyId) -> String {
|
||||
cx.tcx.hir().hir_to_pretty_string(body.hir_id)
|
||||
}
|
||||
|
||||
/// Given a type Path, resolve it to a Type using the TyCtxt
|
||||
fn resolve_type(cx: &DocContext<'_>,
|
||||
path: Path,
|
||||
id: hir::HirId) -> Type {
|
||||
if id == hir::DUMMY_HIR_ID {
|
||||
debug!("resolve_type({:?})", path);
|
||||
} else {
|
||||
debug!("resolve_type({:?},{:?})", path, id);
|
||||
}
|
||||
|
||||
let is_generic = match path.res {
|
||||
Res::PrimTy(p) => match p {
|
||||
hir::Str => return Primitive(PrimitiveType::Str),
|
||||
hir::Bool => return Primitive(PrimitiveType::Bool),
|
||||
hir::Char => return Primitive(PrimitiveType::Char),
|
||||
hir::Int(int_ty) => return Primitive(int_ty.into()),
|
||||
hir::Uint(uint_ty) => return Primitive(uint_ty.into()),
|
||||
hir::Float(float_ty) => return Primitive(float_ty.into()),
|
||||
},
|
||||
Res::SelfTy(..) if path.segments.len() == 1 => {
|
||||
return Generic(kw::SelfUpper.to_string());
|
||||
}
|
||||
Res::Def(DefKind::TyParam, _) if path.segments.len() == 1 => {
|
||||
return Generic(format!("{:#}", path.print()));
|
||||
}
|
||||
Res::SelfTy(..)
|
||||
| Res::Def(DefKind::TyParam, _)
|
||||
| Res::Def(DefKind::AssocTy, _) => true,
|
||||
_ => false,
|
||||
};
|
||||
let did = register_res(&*cx, path.res);
|
||||
ResolvedPath { path, param_names: None, did, is_generic }
|
||||
}
|
||||
|
||||
pub fn register_res(cx: &DocContext<'_>, res: Res) -> DefId {
|
||||
debug!("register_res({:?})", res);
|
||||
|
||||
let (did, kind) = match res {
|
||||
Res::Def(DefKind::Fn, i) => (i, TypeKind::Function),
|
||||
Res::Def(DefKind::TyAlias, i) => (i, TypeKind::Typedef),
|
||||
Res::Def(DefKind::Enum, i) => (i, TypeKind::Enum),
|
||||
Res::Def(DefKind::Trait, i) => (i, TypeKind::Trait),
|
||||
Res::Def(DefKind::Struct, i) => (i, TypeKind::Struct),
|
||||
Res::Def(DefKind::Union, i) => (i, TypeKind::Union),
|
||||
Res::Def(DefKind::Mod, i) => (i, TypeKind::Module),
|
||||
Res::Def(DefKind::ForeignTy, i) => (i, TypeKind::Foreign),
|
||||
Res::Def(DefKind::Const, i) => (i, TypeKind::Const),
|
||||
Res::Def(DefKind::Static, i) => (i, TypeKind::Static),
|
||||
Res::Def(DefKind::Variant, i) => (cx.tcx.parent(i).expect("cannot get parent def id"),
|
||||
TypeKind::Enum),
|
||||
Res::Def(DefKind::Macro(mac_kind), i) => match mac_kind {
|
||||
MacroKind::Bang => (i, TypeKind::Macro),
|
||||
MacroKind::Attr => (i, TypeKind::Attr),
|
||||
MacroKind::Derive => (i, TypeKind::Derive),
|
||||
},
|
||||
Res::Def(DefKind::TraitAlias, i) => (i, TypeKind::TraitAlias),
|
||||
Res::SelfTy(Some(def_id), _) => (def_id, TypeKind::Trait),
|
||||
Res::SelfTy(_, Some(impl_def_id)) => return impl_def_id,
|
||||
_ => return res.def_id()
|
||||
};
|
||||
if did.is_local() { return did }
|
||||
inline::record_extern_fqn(cx, did, kind);
|
||||
if let TypeKind::Trait = kind {
|
||||
inline::record_extern_trait(cx, did);
|
||||
}
|
||||
did
|
||||
}
|
||||
|
||||
fn resolve_use_source(cx: &DocContext<'_>, path: Path) -> ImportSource {
|
||||
ImportSource {
|
||||
did: if path.res.opt_def_id().is_none() {
|
||||
None
|
||||
} else {
|
||||
Some(register_res(cx, path.res))
|
||||
},
|
||||
path,
|
||||
}
|
||||
}
|
||||
|
||||
impl Clean<Item> for doctree::Macro<'_> {
|
||||
fn clean(&self, cx: &DocContext<'_>) -> Item {
|
||||
let name = self.name.clean(cx);
|
||||
@ -2981,29 +2425,6 @@ impl Clean<TypeBindingKind> for hir::TypeBindingKind {
|
||||
}
|
||||
}
|
||||
|
||||
pub fn enter_impl_trait<F, R>(cx: &DocContext<'_>, f: F) -> R
|
||||
where
|
||||
F: FnOnce() -> R,
|
||||
{
|
||||
let old_bounds = mem::take(&mut *cx.impl_trait_bounds.borrow_mut());
|
||||
let r = f();
|
||||
assert!(cx.impl_trait_bounds.borrow().is_empty());
|
||||
*cx.impl_trait_bounds.borrow_mut() = old_bounds;
|
||||
r
|
||||
}
|
||||
|
||||
#[derive(Eq, PartialEq, Hash, Copy, Clone, Debug)]
|
||||
enum RegionTarget<'tcx> {
|
||||
Region(Region<'tcx>),
|
||||
RegionVid(RegionVid)
|
||||
}
|
||||
|
||||
#[derive(Default, Debug, Clone)]
|
||||
struct RegionDeps<'tcx> {
|
||||
larger: FxHashSet<RegionTarget<'tcx>>,
|
||||
smaller: FxHashSet<RegionTarget<'tcx>>
|
||||
}
|
||||
|
||||
enum SimpleBound {
|
||||
TraitBound(Vec<PathSegment>, Vec<SimpleBound>, Vec<GenericParamDef>, hir::TraitBoundModifier),
|
||||
Outlives(Lifetime),
|
||||
|
||||
585
src/librustdoc/clean/utils.rs
Normal file
585
src/librustdoc/clean/utils.rs
Normal file
@ -0,0 +1,585 @@
|
||||
use crate::core::DocContext;
|
||||
use crate::clean::{
|
||||
Clean, Crate, Deprecation, ExternalCrate, FnDecl, FunctionRetTy, Generic, GenericArg,
|
||||
GenericArgs, Generics, GenericBound, GetDefId, ImportSource, Item, ItemEnum, MacroKind, Path,
|
||||
PathSegment, Primitive, PrimitiveType, ResolvedPath, Span, Stability, Type, TypeBinding,
|
||||
TypeKind, Visibility, WherePredicate, inline,
|
||||
};
|
||||
use crate::clean::blanket_impl::BlanketImplFinder;
|
||||
use crate::clean::auto_trait::AutoTraitFinder;
|
||||
|
||||
use rustc::hir;
|
||||
use rustc::hir::def::{DefKind, Res};
|
||||
use rustc::hir::def_id::{DefId, LOCAL_CRATE};
|
||||
use rustc::ty::{self, DefIdTree, Ty};
|
||||
use rustc::ty::subst::{SubstsRef, GenericArgKind};
|
||||
use rustc::util::nodemap::FxHashSet;
|
||||
use syntax_pos;
|
||||
use syntax_pos::symbol::{Symbol, kw, sym};
|
||||
|
||||
use std::mem;
|
||||
|
||||
pub fn krate(mut cx: &mut DocContext<'_>) -> Crate {
|
||||
use crate::visit_lib::LibEmbargoVisitor;
|
||||
|
||||
let krate = cx.tcx.hir().krate();
|
||||
let module = crate::visit_ast::RustdocVisitor::new(&mut cx).visit(krate);
|
||||
|
||||
let mut r = cx.renderinfo.get_mut();
|
||||
r.deref_trait_did = cx.tcx.lang_items().deref_trait();
|
||||
r.deref_mut_trait_did = cx.tcx.lang_items().deref_mut_trait();
|
||||
r.owned_box_did = cx.tcx.lang_items().owned_box();
|
||||
|
||||
let mut externs = Vec::new();
|
||||
for &cnum in cx.tcx.crates().iter() {
|
||||
externs.push((cnum, cnum.clean(cx)));
|
||||
// Analyze doc-reachability for extern items
|
||||
LibEmbargoVisitor::new(&mut cx).visit_lib(cnum);
|
||||
}
|
||||
externs.sort_by(|&(a, _), &(b, _)| a.cmp(&b));
|
||||
|
||||
// Clean the crate, translating the entire libsyntax AST to one that is
|
||||
// understood by rustdoc.
|
||||
let mut module = module.clean(cx);
|
||||
let mut masked_crates = FxHashSet::default();
|
||||
|
||||
match module.inner {
|
||||
ItemEnum::ModuleItem(ref module) => {
|
||||
for it in &module.items {
|
||||
// `compiler_builtins` should be masked too, but we can't apply
|
||||
// `#[doc(masked)]` to the injected `extern crate` because it's unstable.
|
||||
if it.is_extern_crate()
|
||||
&& (it.attrs.has_doc_flag(sym::masked)
|
||||
|| cx.tcx.is_compiler_builtins(it.def_id.krate))
|
||||
{
|
||||
masked_crates.insert(it.def_id.krate);
|
||||
}
|
||||
}
|
||||
}
|
||||
_ => unreachable!(),
|
||||
}
|
||||
|
||||
let ExternalCrate { name, src, primitives, keywords, .. } = LOCAL_CRATE.clean(cx);
|
||||
{
|
||||
let m = match module.inner {
|
||||
ItemEnum::ModuleItem(ref mut m) => m,
|
||||
_ => unreachable!(),
|
||||
};
|
||||
m.items.extend(primitives.iter().map(|&(def_id, prim, ref attrs)| {
|
||||
Item {
|
||||
source: Span::empty(),
|
||||
name: Some(prim.to_url_str().to_string()),
|
||||
attrs: attrs.clone(),
|
||||
visibility: Visibility::Public,
|
||||
stability: get_stability(cx, def_id),
|
||||
deprecation: get_deprecation(cx, def_id),
|
||||
def_id,
|
||||
inner: ItemEnum::PrimitiveItem(prim),
|
||||
}
|
||||
}));
|
||||
m.items.extend(keywords.into_iter().map(|(def_id, kw, attrs)| {
|
||||
Item {
|
||||
source: Span::empty(),
|
||||
name: Some(kw.clone()),
|
||||
attrs,
|
||||
visibility: Visibility::Public,
|
||||
stability: get_stability(cx, def_id),
|
||||
deprecation: get_deprecation(cx, def_id),
|
||||
def_id,
|
||||
inner: ItemEnum::KeywordItem(kw),
|
||||
}
|
||||
}));
|
||||
}
|
||||
|
||||
Crate {
|
||||
name,
|
||||
version: None,
|
||||
src,
|
||||
module: Some(module),
|
||||
externs,
|
||||
primitives,
|
||||
external_traits: cx.external_traits.clone(),
|
||||
masked_crates,
|
||||
collapsed: false,
|
||||
}
|
||||
}
|
||||
|
||||
// extract the stability index for a node from tcx, if possible
|
||||
pub fn get_stability(cx: &DocContext<'_>, def_id: DefId) -> Option<Stability> {
|
||||
cx.tcx.lookup_stability(def_id).clean(cx)
|
||||
}
|
||||
|
||||
pub fn get_deprecation(cx: &DocContext<'_>, def_id: DefId) -> Option<Deprecation> {
|
||||
cx.tcx.lookup_deprecation(def_id).clean(cx)
|
||||
}
|
||||
|
||||
pub fn external_generic_args(
|
||||
cx: &DocContext<'_>,
|
||||
trait_did: Option<DefId>,
|
||||
has_self: bool,
|
||||
bindings: Vec<TypeBinding>,
|
||||
substs: SubstsRef<'_>,
|
||||
) -> GenericArgs {
|
||||
let mut skip_self = has_self;
|
||||
let mut ty_kind = None;
|
||||
let args: Vec<_> = substs.iter().filter_map(|kind| match kind.unpack() {
|
||||
GenericArgKind::Lifetime(lt) => {
|
||||
lt.clean(cx).and_then(|lt| Some(GenericArg::Lifetime(lt)))
|
||||
}
|
||||
GenericArgKind::Type(_) if skip_self => {
|
||||
skip_self = false;
|
||||
None
|
||||
}
|
||||
GenericArgKind::Type(ty) => {
|
||||
ty_kind = Some(&ty.kind);
|
||||
Some(GenericArg::Type(ty.clean(cx)))
|
||||
}
|
||||
GenericArgKind::Const(ct) => Some(GenericArg::Const(ct.clean(cx))),
|
||||
}).collect();
|
||||
|
||||
match trait_did {
|
||||
// Attempt to sugar an external path like Fn<(A, B,), C> to Fn(A, B) -> C
|
||||
Some(did) if cx.tcx.lang_items().fn_trait_kind(did).is_some() => {
|
||||
assert!(ty_kind.is_some());
|
||||
let inputs = match ty_kind {
|
||||
Some(ty::Tuple(ref tys)) => tys.iter().map(|t| t.expect_ty().clean(cx)).collect(),
|
||||
_ => return GenericArgs::AngleBracketed { args, bindings },
|
||||
};
|
||||
let output = None;
|
||||
// FIXME(#20299) return type comes from a projection now
|
||||
// match types[1].kind {
|
||||
// ty::Tuple(ref v) if v.is_empty() => None, // -> ()
|
||||
// _ => Some(types[1].clean(cx))
|
||||
// };
|
||||
GenericArgs::Parenthesized { inputs, output }
|
||||
},
|
||||
_ => {
|
||||
GenericArgs::AngleBracketed { args, bindings }
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// trait_did should be set to a trait's DefId if called on a TraitRef, in order to sugar
|
||||
// from Fn<(A, B,), C> to Fn(A, B) -> C
|
||||
pub fn external_path(cx: &DocContext<'_>, name: Symbol, trait_did: Option<DefId>, has_self: bool,
|
||||
bindings: Vec<TypeBinding>, substs: SubstsRef<'_>) -> Path {
|
||||
Path {
|
||||
global: false,
|
||||
res: Res::Err,
|
||||
segments: vec![PathSegment {
|
||||
name: name.to_string(),
|
||||
args: external_generic_args(cx, trait_did, has_self, bindings, substs)
|
||||
}],
|
||||
}
|
||||
}
|
||||
|
||||
/// The point of this function is to replace bounds with types.
|
||||
///
|
||||
/// i.e. `[T, U]` when you have the following bounds: `T: Display, U: Option<T>` will return
|
||||
/// `[Display, Option]` (we just returns the list of the types, we don't care about the
|
||||
/// wrapped types in here).
|
||||
pub fn get_real_types(
|
||||
generics: &Generics,
|
||||
arg: &Type,
|
||||
cx: &DocContext<'_>,
|
||||
recurse: i32,
|
||||
) -> FxHashSet<Type> {
|
||||
let arg_s = arg.print().to_string();
|
||||
let mut res = FxHashSet::default();
|
||||
if recurse >= 10 { // FIXME: remove this whole recurse thing when the recursion bug is fixed
|
||||
return res;
|
||||
}
|
||||
if arg.is_full_generic() {
|
||||
if let Some(where_pred) = generics.where_predicates.iter().find(|g| {
|
||||
match g {
|
||||
&WherePredicate::BoundPredicate { ref ty, .. } => ty.def_id() == arg.def_id(),
|
||||
_ => false,
|
||||
}
|
||||
}) {
|
||||
let bounds = where_pred.get_bounds().unwrap_or_else(|| &[]);
|
||||
for bound in bounds.iter() {
|
||||
match *bound {
|
||||
GenericBound::TraitBound(ref poly_trait, _) => {
|
||||
for x in poly_trait.generic_params.iter() {
|
||||
if !x.is_type() {
|
||||
continue
|
||||
}
|
||||
if let Some(ty) = x.get_type() {
|
||||
let adds = get_real_types(generics, &ty, cx, recurse + 1);
|
||||
if !adds.is_empty() {
|
||||
res.extend(adds);
|
||||
} else if !ty.is_full_generic() {
|
||||
res.insert(ty);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
}
|
||||
if let Some(bound) = generics.params.iter().find(|g| {
|
||||
g.is_type() && g.name == arg_s
|
||||
}) {
|
||||
for bound in bound.get_bounds().unwrap_or_else(|| &[]) {
|
||||
if let Some(ty) = bound.get_trait_type() {
|
||||
let adds = get_real_types(generics, &ty, cx, recurse + 1);
|
||||
if !adds.is_empty() {
|
||||
res.extend(adds);
|
||||
} else if !ty.is_full_generic() {
|
||||
res.insert(ty.clone());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
res.insert(arg.clone());
|
||||
if let Some(gens) = arg.generics() {
|
||||
for gen in gens.iter() {
|
||||
if gen.is_full_generic() {
|
||||
let adds = get_real_types(generics, gen, cx, recurse + 1);
|
||||
if !adds.is_empty() {
|
||||
res.extend(adds);
|
||||
}
|
||||
} else {
|
||||
res.insert(gen.clone());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
res
|
||||
}
|
||||
|
||||
/// Return the full list of types when bounds have been resolved.
|
||||
///
|
||||
/// i.e. `fn foo<A: Display, B: Option<A>>(x: u32, y: B)` will return
|
||||
/// `[u32, Display, Option]`.
|
||||
pub fn get_all_types(
|
||||
generics: &Generics,
|
||||
decl: &FnDecl,
|
||||
cx: &DocContext<'_>,
|
||||
) -> (Vec<Type>, Vec<Type>) {
|
||||
let mut all_types = FxHashSet::default();
|
||||
for arg in decl.inputs.values.iter() {
|
||||
if arg.type_.is_self_type() {
|
||||
continue;
|
||||
}
|
||||
let args = get_real_types(generics, &arg.type_, cx, 0);
|
||||
if !args.is_empty() {
|
||||
all_types.extend(args);
|
||||
} else {
|
||||
all_types.insert(arg.type_.clone());
|
||||
}
|
||||
}
|
||||
|
||||
let ret_types = match decl.output {
|
||||
FunctionRetTy::Return(ref return_type) => {
|
||||
let mut ret = get_real_types(generics, &return_type, cx, 0);
|
||||
if ret.is_empty() {
|
||||
ret.insert(return_type.clone());
|
||||
}
|
||||
ret.into_iter().collect()
|
||||
}
|
||||
_ => Vec::new(),
|
||||
};
|
||||
(all_types.into_iter().collect(), ret_types)
|
||||
}
|
||||
|
||||
pub fn strip_type(ty: Type) -> Type {
|
||||
match ty {
|
||||
Type::ResolvedPath { path, param_names, did, is_generic } => {
|
||||
Type::ResolvedPath { path: strip_path(&path), param_names, did, is_generic }
|
||||
}
|
||||
Type::Tuple(inner_tys) => {
|
||||
Type::Tuple(inner_tys.iter().map(|t| strip_type(t.clone())).collect())
|
||||
}
|
||||
Type::Slice(inner_ty) => Type::Slice(Box::new(strip_type(*inner_ty))),
|
||||
Type::Array(inner_ty, s) => Type::Array(Box::new(strip_type(*inner_ty)), s),
|
||||
Type::RawPointer(m, inner_ty) => Type::RawPointer(m, Box::new(strip_type(*inner_ty))),
|
||||
Type::BorrowedRef { lifetime, mutability, type_ } => {
|
||||
Type::BorrowedRef { lifetime, mutability, type_: Box::new(strip_type(*type_)) }
|
||||
}
|
||||
Type::QPath { name, self_type, trait_ } => {
|
||||
Type::QPath {
|
||||
name,
|
||||
self_type: Box::new(strip_type(*self_type)), trait_: Box::new(strip_type(*trait_))
|
||||
}
|
||||
}
|
||||
_ => ty
|
||||
}
|
||||
}
|
||||
|
||||
pub fn strip_path(path: &Path) -> Path {
|
||||
let segments = path.segments.iter().map(|s| {
|
||||
PathSegment {
|
||||
name: s.name.clone(),
|
||||
args: GenericArgs::AngleBracketed {
|
||||
args: vec![],
|
||||
bindings: vec![],
|
||||
}
|
||||
}
|
||||
}).collect();
|
||||
|
||||
Path {
|
||||
global: path.global,
|
||||
res: path.res.clone(),
|
||||
segments,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn qpath_to_string(p: &hir::QPath) -> String {
|
||||
let segments = match *p {
|
||||
hir::QPath::Resolved(_, ref path) => &path.segments,
|
||||
hir::QPath::TypeRelative(_, ref segment) => return segment.ident.to_string(),
|
||||
};
|
||||
|
||||
let mut s = String::new();
|
||||
for (i, seg) in segments.iter().enumerate() {
|
||||
if i > 0 {
|
||||
s.push_str("::");
|
||||
}
|
||||
if seg.ident.name != kw::PathRoot {
|
||||
s.push_str(&seg.ident.as_str());
|
||||
}
|
||||
}
|
||||
s
|
||||
}
|
||||
|
||||
pub fn build_deref_target_impls(cx: &DocContext<'_>,
|
||||
items: &[Item],
|
||||
ret: &mut Vec<Item>) {
|
||||
use self::PrimitiveType::*;
|
||||
let tcx = cx.tcx;
|
||||
|
||||
for item in items {
|
||||
let target = match item.inner {
|
||||
ItemEnum::TypedefItem(ref t, true) => &t.type_,
|
||||
_ => continue,
|
||||
};
|
||||
let primitive = match *target {
|
||||
ResolvedPath { did, .. } if did.is_local() => continue,
|
||||
ResolvedPath { did, .. } => {
|
||||
ret.extend(inline::build_impls(cx, did, None));
|
||||
continue
|
||||
}
|
||||
_ => match target.primitive_type() {
|
||||
Some(prim) => prim,
|
||||
None => continue,
|
||||
}
|
||||
};
|
||||
let did = match primitive {
|
||||
Isize => tcx.lang_items().isize_impl(),
|
||||
I8 => tcx.lang_items().i8_impl(),
|
||||
I16 => tcx.lang_items().i16_impl(),
|
||||
I32 => tcx.lang_items().i32_impl(),
|
||||
I64 => tcx.lang_items().i64_impl(),
|
||||
I128 => tcx.lang_items().i128_impl(),
|
||||
Usize => tcx.lang_items().usize_impl(),
|
||||
U8 => tcx.lang_items().u8_impl(),
|
||||
U16 => tcx.lang_items().u16_impl(),
|
||||
U32 => tcx.lang_items().u32_impl(),
|
||||
U64 => tcx.lang_items().u64_impl(),
|
||||
U128 => tcx.lang_items().u128_impl(),
|
||||
F32 => tcx.lang_items().f32_impl(),
|
||||
F64 => tcx.lang_items().f64_impl(),
|
||||
Char => tcx.lang_items().char_impl(),
|
||||
Bool => tcx.lang_items().bool_impl(),
|
||||
Str => tcx.lang_items().str_impl(),
|
||||
Slice => tcx.lang_items().slice_impl(),
|
||||
Array => tcx.lang_items().slice_impl(),
|
||||
Tuple => None,
|
||||
Unit => None,
|
||||
RawPointer => tcx.lang_items().const_ptr_impl(),
|
||||
Reference => None,
|
||||
Fn => None,
|
||||
Never => None,
|
||||
};
|
||||
if let Some(did) = did {
|
||||
if !did.is_local() {
|
||||
inline::build_impl(cx, did, None, ret);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub trait ToSource {
|
||||
fn to_src(&self, cx: &DocContext<'_>) -> String;
|
||||
}
|
||||
|
||||
impl ToSource for syntax_pos::Span {
|
||||
fn to_src(&self, cx: &DocContext<'_>) -> String {
|
||||
debug!("converting span {:?} to snippet", self.clean(cx));
|
||||
let sn = match cx.sess().source_map().span_to_snippet(*self) {
|
||||
Ok(x) => x,
|
||||
Err(_) => String::new()
|
||||
};
|
||||
debug!("got snippet {}", sn);
|
||||
sn
|
||||
}
|
||||
}
|
||||
|
||||
pub fn name_from_pat(p: &hir::Pat) -> String {
|
||||
use rustc::hir::*;
|
||||
debug!("trying to get a name from pattern: {:?}", p);
|
||||
|
||||
match p.kind {
|
||||
PatKind::Wild => "_".to_string(),
|
||||
PatKind::Binding(_, _, ident, _) => ident.to_string(),
|
||||
PatKind::TupleStruct(ref p, ..) | PatKind::Path(ref p) => qpath_to_string(p),
|
||||
PatKind::Struct(ref name, ref fields, etc) => {
|
||||
format!("{} {{ {}{} }}", qpath_to_string(name),
|
||||
fields.iter().map(|fp| format!("{}: {}", fp.ident, name_from_pat(&fp.pat)))
|
||||
.collect::<Vec<String>>().join(", "),
|
||||
if etc { ", .." } else { "" }
|
||||
)
|
||||
}
|
||||
PatKind::Or(ref pats) => {
|
||||
pats.iter().map(|p| name_from_pat(&**p)).collect::<Vec<String>>().join(" | ")
|
||||
}
|
||||
PatKind::Tuple(ref elts, _) => format!("({})", elts.iter().map(|p| name_from_pat(&**p))
|
||||
.collect::<Vec<String>>().join(", ")),
|
||||
PatKind::Box(ref p) => name_from_pat(&**p),
|
||||
PatKind::Ref(ref p, _) => name_from_pat(&**p),
|
||||
PatKind::Lit(..) => {
|
||||
warn!("tried to get argument name from PatKind::Lit, \
|
||||
which is silly in function arguments");
|
||||
"()".to_string()
|
||||
},
|
||||
PatKind::Range(..) => panic!("tried to get argument name from PatKind::Range, \
|
||||
which is not allowed in function arguments"),
|
||||
PatKind::Slice(ref begin, ref mid, ref end) => {
|
||||
let begin = begin.iter().map(|p| name_from_pat(&**p));
|
||||
let mid = mid.as_ref().map(|p| format!("..{}", name_from_pat(&**p))).into_iter();
|
||||
let end = end.iter().map(|p| name_from_pat(&**p));
|
||||
format!("[{}]", begin.chain(mid).chain(end).collect::<Vec<_>>().join(", "))
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
pub fn print_const(cx: &DocContext<'_>, n: &ty::Const<'_>) -> String {
|
||||
match n.val {
|
||||
ty::ConstKind::Unevaluated(def_id, _) => {
|
||||
if let Some(hir_id) = cx.tcx.hir().as_local_hir_id(def_id) {
|
||||
print_const_expr(cx, cx.tcx.hir().body_owned_by(hir_id))
|
||||
} else {
|
||||
inline::print_inlined_const(cx, def_id)
|
||||
}
|
||||
},
|
||||
_ => {
|
||||
let mut s = n.to_string();
|
||||
// array lengths are obviously usize
|
||||
if s.ends_with("usize") {
|
||||
let n = s.len() - "usize".len();
|
||||
s.truncate(n);
|
||||
if s.ends_with(": ") {
|
||||
let n = s.len() - ": ".len();
|
||||
s.truncate(n);
|
||||
}
|
||||
}
|
||||
s
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
pub fn print_const_expr(cx: &DocContext<'_>, body: hir::BodyId) -> String {
|
||||
cx.tcx.hir().hir_to_pretty_string(body.hir_id)
|
||||
}
|
||||
|
||||
/// Given a type Path, resolve it to a Type using the TyCtxt
|
||||
pub fn resolve_type(cx: &DocContext<'_>,
|
||||
path: Path,
|
||||
id: hir::HirId) -> Type {
|
||||
if id == hir::DUMMY_HIR_ID {
|
||||
debug!("resolve_type({:?})", path);
|
||||
} else {
|
||||
debug!("resolve_type({:?},{:?})", path, id);
|
||||
}
|
||||
|
||||
let is_generic = match path.res {
|
||||
Res::PrimTy(p) => match p {
|
||||
hir::Str => return Primitive(PrimitiveType::Str),
|
||||
hir::Bool => return Primitive(PrimitiveType::Bool),
|
||||
hir::Char => return Primitive(PrimitiveType::Char),
|
||||
hir::Int(int_ty) => return Primitive(int_ty.into()),
|
||||
hir::Uint(uint_ty) => return Primitive(uint_ty.into()),
|
||||
hir::Float(float_ty) => return Primitive(float_ty.into()),
|
||||
},
|
||||
Res::SelfTy(..) if path.segments.len() == 1 => {
|
||||
return Generic(kw::SelfUpper.to_string());
|
||||
}
|
||||
Res::Def(DefKind::TyParam, _) if path.segments.len() == 1 => {
|
||||
return Generic(format!("{:#}", path.print()));
|
||||
}
|
||||
Res::SelfTy(..)
|
||||
| Res::Def(DefKind::TyParam, _)
|
||||
| Res::Def(DefKind::AssocTy, _) => true,
|
||||
_ => false,
|
||||
};
|
||||
let did = register_res(&*cx, path.res);
|
||||
ResolvedPath { path, param_names: None, did, is_generic }
|
||||
}
|
||||
|
||||
pub fn get_auto_trait_and_blanket_impls(
|
||||
cx: &DocContext<'tcx>,
|
||||
ty: Ty<'tcx>,
|
||||
param_env_def_id: DefId,
|
||||
) -> impl Iterator<Item = Item> {
|
||||
AutoTraitFinder::new(cx).get_auto_trait_impls(ty, param_env_def_id).into_iter()
|
||||
.chain(BlanketImplFinder::new(cx).get_blanket_impls(ty, param_env_def_id))
|
||||
}
|
||||
|
||||
pub fn register_res(cx: &DocContext<'_>, res: Res) -> DefId {
|
||||
debug!("register_res({:?})", res);
|
||||
|
||||
let (did, kind) = match res {
|
||||
Res::Def(DefKind::Fn, i) => (i, TypeKind::Function),
|
||||
Res::Def(DefKind::TyAlias, i) => (i, TypeKind::Typedef),
|
||||
Res::Def(DefKind::Enum, i) => (i, TypeKind::Enum),
|
||||
Res::Def(DefKind::Trait, i) => (i, TypeKind::Trait),
|
||||
Res::Def(DefKind::Struct, i) => (i, TypeKind::Struct),
|
||||
Res::Def(DefKind::Union, i) => (i, TypeKind::Union),
|
||||
Res::Def(DefKind::Mod, i) => (i, TypeKind::Module),
|
||||
Res::Def(DefKind::ForeignTy, i) => (i, TypeKind::Foreign),
|
||||
Res::Def(DefKind::Const, i) => (i, TypeKind::Const),
|
||||
Res::Def(DefKind::Static, i) => (i, TypeKind::Static),
|
||||
Res::Def(DefKind::Variant, i) => (cx.tcx.parent(i).expect("cannot get parent def id"),
|
||||
TypeKind::Enum),
|
||||
Res::Def(DefKind::Macro(mac_kind), i) => match mac_kind {
|
||||
MacroKind::Bang => (i, TypeKind::Macro),
|
||||
MacroKind::Attr => (i, TypeKind::Attr),
|
||||
MacroKind::Derive => (i, TypeKind::Derive),
|
||||
},
|
||||
Res::Def(DefKind::TraitAlias, i) => (i, TypeKind::TraitAlias),
|
||||
Res::SelfTy(Some(def_id), _) => (def_id, TypeKind::Trait),
|
||||
Res::SelfTy(_, Some(impl_def_id)) => return impl_def_id,
|
||||
_ => return res.def_id()
|
||||
};
|
||||
if did.is_local() { return did }
|
||||
inline::record_extern_fqn(cx, did, kind);
|
||||
if let TypeKind::Trait = kind {
|
||||
inline::record_extern_trait(cx, did);
|
||||
}
|
||||
did
|
||||
}
|
||||
|
||||
pub fn resolve_use_source(cx: &DocContext<'_>, path: Path) -> ImportSource {
|
||||
ImportSource {
|
||||
did: if path.res.opt_def_id().is_none() {
|
||||
None
|
||||
} else {
|
||||
Some(register_res(cx, path.res))
|
||||
},
|
||||
path,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn enter_impl_trait<F, R>(cx: &DocContext<'_>, f: F) -> R
|
||||
where
|
||||
F: FnOnce() -> R,
|
||||
{
|
||||
let old_bounds = mem::take(&mut *cx.impl_trait_bounds.borrow_mut());
|
||||
let r = f();
|
||||
assert!(cx.impl_trait_bounds.borrow().is_empty());
|
||||
*cx.impl_trait_bounds.borrow_mut() = old_bounds;
|
||||
r
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user