Auto merge of rust-lang#6653 - flip1995:rustup, r=flip1995

Rustup

changelog: Deprecate `unknown_clippy_lints` (integrated in `unknown_lints`)

r? `@ghost`

Author: bors

clippy_lints/src/attrs.rs

@@ -10,11 +10,10 @@ use rustc_errors::Applicability;
 use rustc_hir::{
     Block, Expr, ExprKind, ImplItem, ImplItemKind, Item, ItemKind, StmtKind, TraitFn, TraitItem, TraitItemKind,
 };
-use rustc_lint::{CheckLintNameResult, EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
+use rustc_lint::{EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintContext};
 use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
-use rustc_span::lev_distance::find_best_match_for_name;
 use rustc_span::source_map::Span;
 use rustc_span::sym;
 use rustc_span::symbol::{Symbol, SymbolStr};
@@ -156,33 +155,6 @@ declare_clippy_lint! {
     "empty line after outer attribute"
 }
 
-declare_clippy_lint! {
-    /// **What it does:** Checks for `allow`/`warn`/`deny`/`forbid` attributes with scoped clippy
-    /// lints and if those lints exist in clippy. If there is an uppercase letter in the lint name
-    /// (not the tool name) and a lowercase version of this lint exists, it will suggest to lowercase
-    /// the lint name.
-    ///
-    /// **Why is this bad?** A lint attribute with a mistyped lint name won't have an effect.
-    ///
-    /// **Known problems:** None.
-    ///
-    /// **Example:**
-    /// Bad:
-    /// ```rust
-    /// #![warn(if_not_els)]
-    /// #![deny(clippy::All)]
-    /// ```
-    ///
-    /// Good:
-    /// ```rust
-    /// #![warn(if_not_else)]
-    /// #![deny(clippy::all)]
-    /// ```
-    pub UNKNOWN_CLIPPY_LINTS,
-    style,
-    "unknown_lints for scoped Clippy lints"
-}
-
 declare_clippy_lint! {
     /// **What it does:** Checks for `warn`/`deny`/`forbid` attributes targeting the whole clippy::restriction category.
     ///
@@ -272,7 +244,6 @@ declare_lint_pass!(Attributes => [
     INLINE_ALWAYS,
     DEPRECATED_SEMVER,
     USELESS_ATTRIBUTE,
-    UNKNOWN_CLIPPY_LINTS,
     BLANKET_CLIPPY_RESTRICTION_LINTS,
 ]);
 
@@ -409,48 +380,9 @@ fn extract_clippy_lint(lint: &NestedMetaItem) -> Option<SymbolStr> {
 }
 
 fn check_clippy_lint_names(cx: &LateContext<'_>, ident: &str, items: &[NestedMetaItem]) {
-    let lint_store = cx.lints();
     for lint in items {
         if let Some(lint_name) = extract_clippy_lint(lint) {
-            if let CheckLintNameResult::Tool(Err((None, _))) = lint_store.check_lint_name(&lint_name, Some(sym::clippy))
-            {
-                span_lint_and_then(
-                    cx,
-                    UNKNOWN_CLIPPY_LINTS,
-                    lint.span(),
-                    &format!("unknown clippy lint: clippy::{}", lint_name),
-                    |diag| {
-                        let name_lower = lint_name.to_lowercase();
-                        let symbols = lint_store
-                            .get_lints()
-                            .iter()
-                            .map(|l| Symbol::intern(&l.name_lower()))
-                            .collect::<Vec<_>>();
-                        let sugg = find_best_match_for_name(
-                            &symbols,
-                            Symbol::intern(&format!("clippy::{}", name_lower)),
-                            None,
-                        );
-                        if lint_name.chars().any(char::is_uppercase)
-                            && lint_store.find_lints(&format!("clippy::{}", name_lower)).is_ok()
-                        {
-                            diag.span_suggestion(
-                                lint.span(),
-                                "lowercase the lint name",
-                                format!("clippy::{}", name_lower),
-                                Applicability::MachineApplicable,
-                            );
-                        } else if let Some(sugg) = sugg {
-                            diag.span_suggestion(
-                                lint.span(),
-                                "did you mean",
-                                sugg.to_string(),
-                                Applicability::MachineApplicable,
-                            );
-                        }
-                    },
-                );
-            } else if lint_name == "restriction" && ident != "allow" {
+            if lint_name == "restriction" && ident != "allow" {
                 span_lint_and_help(
                     cx,
                     BLANKET_CLIPPY_RESTRICTION_LINTS,

clippy_lints/src/bytecount.rs

@@ -2,11 +2,10 @@ use crate::utils::{
     contains_name, get_pat_name, match_type, paths, single_segment_path, snippet_with_applicability, span_lint_and_sugg,
 };
 use if_chain::if_chain;
-use rustc_ast::ast::UintTy;
 use rustc_errors::Applicability;
 use rustc_hir::{BinOpKind, BorrowKind, Expr, ExprKind, UnOp};
 use rustc_lint::{LateContext, LateLintPass};
-use rustc_middle::ty;
+use rustc_middle::ty::{self, UintTy};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::sym;
 use rustc_span::Symbol;

clippy_lints/src/consts.rs

@@ -2,14 +2,14 @@
 
 use crate::utils::{clip, sext, unsext};
 use if_chain::if_chain;
-use rustc_ast::ast::{FloatTy, LitFloatType, LitKind};
+use rustc_ast::ast::{self, LitFloatType, LitKind};
 use rustc_data_structures::sync::Lrc;
 use rustc_hir::def::{DefKind, Res};
 use rustc_hir::{BinOp, BinOpKind, Block, Expr, ExprKind, HirId, QPath, UnOp};
 use rustc_lint::LateContext;
 use rustc_middle::mir::interpret::Scalar;
 use rustc_middle::ty::subst::{Subst, SubstsRef};
-use rustc_middle::ty::{self, ScalarInt, Ty, TyCtxt};
+use rustc_middle::ty::{self, FloatTy, ScalarInt, Ty, TyCtxt};
 use rustc_middle::{bug, span_bug};
 use rustc_span::symbol::Symbol;
 use std::cmp::Ordering::{self, Equal};
@@ -167,8 +167,8 @@ pub fn lit_to_constant(lit: &LitKind, ty: Option<Ty<'_>>) -> Constant {
         LitKind::Char(c) => Constant::Char(c),
         LitKind::Int(n, _) => Constant::Int(n),
         LitKind::Float(ref is, LitFloatType::Suffixed(fty)) => match fty {
-            FloatTy::F32 => Constant::F32(is.as_str().parse().unwrap()),
-            FloatTy::F64 => Constant::F64(is.as_str().parse().unwrap()),
+            ast::FloatTy::F32 => Constant::F32(is.as_str().parse().unwrap()),
+            ast::FloatTy::F64 => Constant::F64(is.as_str().parse().unwrap()),
         },
         LitKind::Float(ref is, LitFloatType::Unsuffixed) => match ty.expect("type of float is known").kind() {
             ty::Float(FloatTy::F32) => Constant::F32(is.as_str().parse().unwrap()),

clippy_lints/src/default.rs

@@ -1,5 +1,5 @@
 use crate::utils::{
-    any_parent_is_automatically_derived, contains_name, match_def_path, paths, qpath_res, snippet_with_macro_callsite,
+    any_parent_is_automatically_derived, contains_name, match_def_path, paths, snippet_with_macro_callsite,
 };
 use crate::utils::{span_lint_and_note, span_lint_and_sugg};
 use if_chain::if_chain;
@@ -231,7 +231,7 @@ fn is_expr_default<'tcx>(expr: &'tcx Expr<'tcx>, cx: &LateContext<'tcx>) -> bool
     if_chain! {
         if let ExprKind::Call(ref fn_expr, _) = &expr.kind;
         if let ExprKind::Path(qpath) = &fn_expr.kind;
-        if let Res::Def(_, def_id) = qpath_res(cx, qpath, fn_expr.hir_id);
+        if let Res::Def(_, def_id) = cx.qpath_res(qpath, fn_expr.hir_id);
         then {
             // right hand side of assignment is `Default::default`
             match_def_path(cx, def_id, &paths::DEFAULT_TRAIT_METHOD)

clippy_lints/src/deprecated_lints.rs

@@ -163,11 +163,28 @@ declare_deprecated_lint! {
 }
 
 declare_deprecated_lint! {
+    /// **What it does:** Nothing. This lint has been deprecated.
+    ///
+    /// **Deprecation reason:** This lint has been uplifted to rustc and is now called
+    /// `panic_fmt`.
     pub PANIC_PARAMS,
     "this lint has been uplifted to rustc and is now called `panic_fmt`"
 }
 
 declare_deprecated_lint! {
+    /// **What it does:** Nothing. This lint has been deprecated.
+    ///
+    /// **Deprecation reason:** This lint has been integrated into the `unknown_lints`
+    /// rustc lint.
+    pub UNKNOWN_CLIPPY_LINTS,
+    "this lint has been integrated into the `unknown_lints` rustc lint"
+}
+
+declare_deprecated_lint! {
+    /// **What it does:** Nothing. This lint has been deprecated.
+    ///
+    /// **Deprecation reason:** This lint has been replaced by `manual_find_map`, a
+    /// more specific lint.
     pub FIND_MAP,
-    "this lint is replaced by `manual_find_map`, a more specific lint"
+    "this lint has been replaced by `manual_find_map`, a more specific lint"
 }

clippy_lints/src/doc.rs

@@ -12,6 +12,7 @@ use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::lint::in_external_macro;
 use rustc_middle::ty;
 use rustc_parse::maybe_new_parser_from_source_str;
+use rustc_parse::parser::ForceCollect;
 use rustc_session::parse::ParseSess;
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::edition::Edition;
@@ -483,7 +484,7 @@ fn check_code(cx: &LateContext<'_>, text: &str, edition: Edition, span: Span) {
 
                 let mut relevant_main_found = false;
                 loop {
-                    match parser.parse_item() {
+                    match parser.parse_item(ForceCollect::No) {
                         Ok(Some(item)) => match &item.kind {
                             // Tests with one of these items are ignored
                             ItemKind::Static(..)

clippy_lints/src/drop_forget_ref.rs

@@ -1,4 +1,4 @@
-use crate::utils::{is_copy, match_def_path, paths, qpath_res, span_lint_and_note};
+use crate::utils::{is_copy, match_def_path, paths, span_lint_and_note};
 use if_chain::if_chain;
 use rustc_hir::{Expr, ExprKind};
 use rustc_lint::{LateContext, LateLintPass};
@@ -114,7 +114,7 @@ impl<'tcx> LateLintPass<'tcx> for DropForgetRef {
             if let ExprKind::Call(ref path, ref args) = expr.kind;
             if let ExprKind::Path(ref qpath) = path.kind;
             if args.len() == 1;
-            if let Some(def_id) = qpath_res(cx, qpath, path.hir_id).opt_def_id();
+            if let Some(def_id) = cx.qpath_res(qpath, path.hir_id).opt_def_id();
             then {
                 let lint;
                 let msg;

clippy_lints/src/enum_clike.rs

@@ -3,11 +3,10 @@
 
 use crate::consts::{miri_to_const, Constant};
 use crate::utils::span_lint;
-use rustc_ast::ast::{IntTy, UintTy};
 use rustc_hir::{Item, ItemKind};
 use rustc_lint::{LateContext, LateLintPass};
-use rustc_middle::ty;
 use rustc_middle::ty::util::IntTypeExt;
+use rustc_middle::ty::{self, IntTy, UintTy};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use std::convert::TryFrom;
 

clippy_lints/src/exit.rs

@@ -1,4 +1,4 @@
-use crate::utils::{is_entrypoint_fn, match_def_path, paths, qpath_res, span_lint};
+use crate::utils::{is_entrypoint_fn, match_def_path, paths, span_lint};
 use if_chain::if_chain;
 use rustc_hir::{Expr, ExprKind, Item, ItemKind, Node};
 use rustc_lint::{LateContext, LateLintPass};
@@ -29,7 +29,7 @@ impl<'tcx> LateLintPass<'tcx> for Exit {
         if_chain! {
             if let ExprKind::Call(ref path_expr, ref _args) = e.kind;
             if let ExprKind::Path(ref path) = path_expr.kind;
-            if let Some(def_id) = qpath_res(cx, path, path_expr.hir_id).opt_def_id();
+            if let Some(def_id) = cx.qpath_res(path, path_expr.hir_id).opt_def_id();
             if match_def_path(cx, def_id, &paths::EXIT);
             then {
                 let parent = cx.tcx.hir().get_parent_item(e.hir_id);

clippy_lints/src/fallible_impl_from.rs

@@ -1,7 +1,4 @@
-use crate::utils::paths::FROM_TRAIT;
-use crate::utils::{
-    is_expn_of, is_type_diagnostic_item, match_def_path, match_panic_def_id, method_chain_args, span_lint_and_then,
-};
+use crate::utils::{is_expn_of, is_type_diagnostic_item, match_panic_def_id, method_chain_args, span_lint_and_then};
 use if_chain::if_chain;
 use rustc_hir as hir;
 use rustc_lint::{LateContext, LateLintPass};
@@ -59,7 +56,7 @@ impl<'tcx> LateLintPass<'tcx> for FallibleImplFrom {
         if_chain! {
             if let hir::ItemKind::Impl(impl_) = &item.kind;
             if let Some(impl_trait_ref) = cx.tcx.impl_trait_ref(impl_def_id);
-            if match_def_path(cx, impl_trait_ref.def_id, &FROM_TRAIT);
+            if cx.tcx.is_diagnostic_item(sym::from_trait, impl_trait_ref.def_id);
             then {
                 lint_impl_body(cx, item.span, impl_.items);
             }