mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-24 21:53:23 +00:00
82afb16179
Clippy has an internal lint that checks for the usage of hardcoded def paths and suggests to replace them with a lang or diagnostic item, if possible. This was implemented with a hack, by getting all the variants of the `LangItem` enum and then index into it with the position of the `LangItem` in the `items` list. This is no longer possible, because the `items` list can't be accessed anymore.
62 lines
2.1 KiB
Rust
62 lines
2.1 KiB
Rust
// run-rustfix
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// aux-build:paths.rs
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#![deny(clippy::internal)]
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#![feature(rustc_private)]
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extern crate clippy_utils;
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extern crate paths;
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extern crate rustc_hir;
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extern crate rustc_lint;
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extern crate rustc_middle;
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extern crate rustc_span;
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#[allow(unused)]
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use clippy_utils::ty::{is_type_diagnostic_item, is_type_lang_item, match_type};
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#[allow(unused)]
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use clippy_utils::{
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is_expr_path_def_path, is_path_diagnostic_item, is_res_diagnostic_ctor, is_res_lang_ctor, is_trait_method,
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match_def_path, match_trait_method, path_res,
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};
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#[allow(unused)]
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use rustc_hir::LangItem;
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#[allow(unused)]
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use rustc_span::sym;
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use rustc_hir::def_id::DefId;
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use rustc_hir::Expr;
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use rustc_lint::LateContext;
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use rustc_middle::ty::Ty;
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#[allow(unused, clippy::unnecessary_def_path)]
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static OPTION: [&str; 3] = ["core", "option", "Option"];
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#[allow(unused, clippy::unnecessary_def_path)]
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const RESULT: &[&str] = &["core", "result", "Result"];
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fn _f<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'tcx>, did: DefId, expr: &Expr<'_>) {
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let _ = is_type_diagnostic_item(cx, ty, sym::Option);
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let _ = is_type_diagnostic_item(cx, ty, sym::Result);
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let _ = is_type_diagnostic_item(cx, ty, sym::Result);
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#[allow(unused, clippy::unnecessary_def_path)]
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let rc_path = &["alloc", "rc", "Rc"];
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let _ = is_type_diagnostic_item(cx, ty, sym::Rc);
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let _ = is_type_diagnostic_item(cx, ty, sym::Option);
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let _ = is_type_diagnostic_item(cx, ty, sym::Result);
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let _ = is_type_lang_item(cx, ty, LangItem::OwnedBox);
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let _ = is_type_diagnostic_item(cx, ty, sym::maybe_uninit_uninit);
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let _ = cx.tcx.lang_items().get(LangItem::OwnedBox) == Some(did);
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let _ = cx.tcx.is_diagnostic_item(sym::Option, did);
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let _ = cx.tcx.lang_items().get(LangItem::OptionSome) == Some(did);
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let _ = is_trait_method(cx, expr, sym::AsRef);
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let _ = is_path_diagnostic_item(cx, expr, sym::Option);
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let _ = path_res(cx, expr).opt_def_id().map_or(false, |id| cx.tcx.lang_items().get(LangItem::IteratorNext) == Some(id));
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let _ = is_res_lang_ctor(cx, path_res(cx, expr), LangItem::OptionSome);
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}
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fn main() {}
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