modify code

[rust.git] / clippy_lints / src / ranges.rs

diff --git a/clippy_lints/src/ranges.rs b/clippy_lints/src/ranges.rs
index 0179bd48ee3cb2fd280c779b823993b1e148c164..8065ed3ffc55b44107959277d1260c16d3907b27 100644 (file)
--- a/clippy_lints/src/ranges.rs
+++ b/clippy_lints/src/ranges.rs
@@ -8,7 +8,7 @@
 use rustc_ast::ast::RangeLimits;
 use rustc_errors::Applicability;
 use rustc_hir::{BinOpKind, Expr, ExprKind, PathSegment, QPath};
-use rustc_lint::{LateContext, LateLintPass, LintContext};
+use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::ty;
 use rustc_semver::RustcVersion;
 use rustc_session::{declare_tool_lint, impl_lint_pass};
@@ -35,6 +35,7 @@
     /// # let x = vec![1];
     /// x.iter().enumerate();
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub RANGE_ZIP_WITH_LEN,
     complexity,
     "zipping iterator with a range when `enumerate()` would do"
@@ -51,7 +52,7 @@
     ///
     /// ### Known problems
     /// Will add unnecessary pair of parentheses when the
-    /// expression is not wrapped in a pair but starts with a opening parenthesis
+    /// expression is not wrapped in a pair but starts with an opening parenthesis
     /// and ends with a closing one.
     /// I.e., `let _ = (f()+1)..(f()+1)` results in `let _ = ((f()+1)..=f())`.
     ///
@@ -72,6 +73,7 @@
     /// ```rust,ignore
     /// for x..=y { .. }
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub RANGE_PLUS_ONE,
     pedantic,
     "`x..(y+1)` reads better as `x..=y`"
@@ -100,6 +102,7 @@
     /// ```rust,ignore
     /// for x..y { .. }
     /// ```
+    #[clippy::version = "pre 1.29.0"]
     pub RANGE_MINUS_ONE,
     pedantic,
     "`x..=(y-1)` reads better as `x..y`"
@@ -132,6 +135,7 @@
     ///     let sub = &arr[1..3];
     /// }
     /// ```
+    #[clippy::version = "1.45.0"]
     pub REVERSED_EMPTY_RANGES,
     correctness,
     "reversing the limits of range expressions, resulting in empty ranges"
@@ -158,6 +162,7 @@
     ///# let x = 6;
     /// assert!((3..8).contains(&x));
     /// ```
+    #[clippy::version = "1.49.0"]
     pub MANUAL_RANGE_CONTAINS,
     style,
     "manually reimplementing {`Range`, `RangeInclusive`}`::contains`"
@@ -185,7 +190,7 @@ pub fn new(msrv: Option<RustcVersion>) -> Self {
 impl<'tcx> LateLintPass<'tcx> for Ranges {
     fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) {
         match expr.kind {
-            ExprKind::MethodCall(path, _, args, _) => {
+            ExprKind::MethodCall(path, args, _) => {
                 check_range_zip_with_len(cx, path, args, expr.span);
             },
             ExprKind::Binary(ref op, l, r) => {
@@ -326,13 +331,13 @@ fn check_range_zip_with_len(cx: &LateContext<'_>, path: &PathSegment<'_>, args:
         if path.ident.as_str() == "zip";
         if let [iter, zip_arg] = args;
         // `.iter()` call
-        if let ExprKind::MethodCall(iter_path, _, iter_args, _) = iter.kind;
+        if let ExprKind::MethodCall(iter_path, iter_args, _) = iter.kind;
         if iter_path.ident.name == sym::iter;
         // range expression in `.zip()` call: `0..x.len()`
-        if let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::range(zip_arg);
+        if let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::Range::hir(zip_arg);
         if is_integer_const(cx, start, 0);
         // `.len()` call
-        if let ExprKind::MethodCall(len_path, _, len_args, _) = end.kind;
+        if let ExprKind::MethodCall(len_path, len_args, _) = end.kind;
         if len_path.ident.name == sym::len && len_args.len() == 1;
         // `.iter()` and `.len()` called on same `Path`
         if let ExprKind::Path(QPath::Resolved(_, iter_path)) = iter_args[0].kind;
@@ -356,7 +361,7 @@ fn check_exclusive_range_plus_one(cx: &LateContext<'_>, expr: &Expr<'_>) {
             start,
             end: Some(end),
             limits: RangeLimits::HalfOpen
-        }) = higher::range(expr);
+        }) = higher::Range::hir(expr);
         if let Some(y) = y_plus_one(cx, end);
         then {
             let span = if expr.span.from_expansion() {
@@ -373,8 +378,8 @@ fn check_exclusive_range_plus_one(cx: &LateContext<'_>, expr: &Expr<'_>) {
                 span,
                 "an inclusive range would be more readable",
                 |diag| {
-                    let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").to_string());
-                    let end = Sugg::hir(cx, y, "y");
+                    let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").maybe_par().to_string());
+                    let end = Sugg::hir(cx, y, "y").maybe_par();
                     if let Some(is_wrapped) = &snippet_opt(cx, span) {
                         if is_wrapped.starts_with('(') && is_wrapped.ends_with(')') {
                             diag.span_suggestion(
@@ -401,7 +406,7 @@ fn check_exclusive_range_plus_one(cx: &LateContext<'_>, expr: &Expr<'_>) {
 // inclusive range minus one: `x..=(y-1)`
 fn check_inclusive_range_minus_one(cx: &LateContext<'_>, expr: &Expr<'_>) {
     if_chain! {
-        if let Some(higher::Range { start, end: Some(end), limits: RangeLimits::Closed }) = higher::range(expr);
+        if let Some(higher::Range { start, end: Some(end), limits: RangeLimits::Closed }) = higher::Range::hir(expr);
         if let Some(y) = y_minus_one(cx, end);
         then {
             span_lint_and_then(
@@ -410,8 +415,8 @@ fn check_inclusive_range_minus_one(cx: &LateContext<'_>, expr: &Expr<'_>) {
                 expr.span,
                 "an exclusive range would be more readable",
                 |diag| {
-                    let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").to_string());
-                    let end = Sugg::hir(cx, y, "y");
+                    let start = start.map_or(String::new(), |x| Sugg::hir(cx, x, "x").maybe_par().to_string());
+                    let end = Sugg::hir(cx, y, "y").maybe_par();
                     diag.span_suggestion(
                         expr.span,
                         "use",
@@ -438,8 +443,8 @@ fn inside_indexing_expr(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
     fn is_for_loop_arg(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
         let mut cur_expr = expr;
         while let Some(parent_expr) = get_parent_expr(cx, cur_expr) {
-            match higher::for_loop(parent_expr) {
-                Some((_, args, _, _)) if args.hir_id == expr.hir_id => return true,
+            match higher::ForLoop::hir(parent_expr) {
+                Some(higher::ForLoop { arg, .. }) if arg.hir_id == expr.hir_id => return true,
                 _ => cur_expr = parent_expr,
             }
         }
@@ -455,7 +460,7 @@ fn is_empty_range(limits: RangeLimits, ordering: Ordering) -> bool {
     }
 
     if_chain! {
-        if let Some(higher::Range { start: Some(start), end: Some(end), limits }) = higher::range(expr);
+        if let Some(higher::Range { start: Some(start), end: Some(end), limits }) = higher::Range::hir(expr);
         let ty = cx.typeck_results().expr_ty(start);
         if let ty::Int(_) | ty::Uint(_) = ty.kind();
         if let Some((start_idx, _)) = constant(cx, cx.typeck_results(), start);