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Resolve primitive impls in clippy_utils::path_to_res

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This commit is contained in:
Alex Macleod 2021-12-09 19:11:40 +00:00
parent ae01c4ab3c
commit 91581f6d5e
1 changed files with 26 additions and 10 deletions
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36
clippy_utils/src/lib.rs
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@ -70,16 +70,16 @@
use rustc_data_structures::unhash::UnhashMap;
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::DefId;
use rustc_hir::def_id::{CrateNum, DefId};
use rustc_hir::hir_id::{HirIdMap, HirIdSet};
use rustc_hir::intravisit::{walk_expr, ErasedMap, FnKind, NestedVisitorMap, Visitor};
use rustc_hir::itemlikevisit::ItemLikeVisitor;
use rustc_hir::LangItem::{OptionNone, ResultErr, ResultOk};
use rustc_hir::{
def, Arm, BindingAnnotation, Block, BlockCheckMode, Body, Constness, Destination, Expr, ExprKind, FnDecl,
ForeignItem, GenericArgs, HirId, Impl, ImplItem, ImplItemKind, IsAsync, Item, ItemKind, LangItem, Local,
MatchSource, Mutability, Node, Param, Pat, PatKind, Path, PathSegment, PrimTy, QPath, Stmt, StmtKind, TraitItem,
TraitItemKind, TraitRef, TyKind, UnOp,
def, lang_items, Arm, BindingAnnotation, Block, BlockCheckMode, Body, Constness, Destination, Expr, ExprKind,
FnDecl, ForeignItem, GenericArgs, HirId, Impl, ImplItem, ImplItemKind, IsAsync, Item, ItemKind, LangItem, Local,
MatchSource, Mutability, Node, Param, Pat, PatKind, Path, PathSegment, PrimTy, QPath, Stmt, StmtKind, Target,
TraitItem, TraitItemKind, TraitRef, TyKind, UnOp,
};
use rustc_lint::{LateContext, Level, Lint, LintContext};
use rustc_middle::hir::exports::Export;
@ -525,18 +525,34 @@ fn item_child_by_name<'tcx>(tcx: TyCtxt<'tcx>, def_id: DefId, name: &str) -> Opt
.iter()
.find(|item| item.ident.name.as_str() == name)
}
fn find_primitive(tcx: TyCtxt<'_>, name: &str) -> Option<DefId> {
if let Some(&(index, Target::Impl)) = lang_items::ITEM_REFS.get(&Symbol::intern(name)) {
tcx.lang_items().items()[index]
} else {
None
}
}
fn find_crate(tcx: TyCtxt<'_>, name: &str) -> Option<DefId> {
tcx.crates(())
.iter()
.find(|&&num| tcx.crate_name(num).as_str() == name)
.map(CrateNum::as_def_id)
}
let (krate, first, path) = match *path {
[krate, first, ref path @ ..] => (krate, first, path),
let (base, first, path) = match *path {
[base, first, ref path @ ..] => (base, first, path),
[primitive] => {
return PrimTy::from_name(Symbol::intern(primitive)).map_or(Res::Err, Res::PrimTy);
},
_ => return Res::Err,
};
let tcx = cx.tcx;
let crates = tcx.crates(());
let krate = try_res!(crates.iter().find(|&&num| tcx.crate_name(num).as_str() == krate));
let first = try_res!(item_child_by_name(tcx, krate.as_def_id(), first));
let first = try_res!(
find_primitive(tcx, base)
.or_else(|| find_crate(tcx, base))
.and_then(|id| item_child_by_name(tcx, id, first))
);
let last = path
.iter()
.copied()