Added MSRV and fixed typo

clippy_lints/src/from_over_into.rs

@@ -1,9 +1,12 @@
 use crate::utils::paths::INTO;
-use crate::utils::{match_def_path, span_lint_and_help};
+use crate::utils::{match_def_path, meets_msrv, span_lint_and_help};
 use if_chain::if_chain;
 use rustc_hir as hir;
-use rustc_lint::{LateContext, LateLintPass};
-use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_lint::{LateContext, LateLintPass, LintContext};
+use rustc_semver::RustcVersion;
+use rustc_session::{declare_tool_lint, impl_lint_pass};
+
+const FROM_OVER_INTO_MSRV: RustcVersion = RustcVersion::new(1, 41, 0);
 
 declare_clippy_lint! {
     /// **What it does:** Searches for implementations of the `Into<..>` trait and suggests to implement `From<..>` instead.
@@ -38,10 +41,25 @@
     "Warns on implementations of `Into<..>` to use `From<..>`"
 }
 
-declare_lint_pass!(FromOverInto => [FROM_OVER_INTO]);
+pub struct FromOverInto {
+    msrv: Option<RustcVersion>,
+}
+
+impl FromOverInto {
+    #[must_use]
+    pub fn new(msrv: Option<RustcVersion>) -> Self {
+        FromOverInto { msrv }
+    }
+}
+
+impl_lint_pass!(FromOverInto => [FROM_OVER_INTO]);
 
 impl LateLintPass<'_> for FromOverInto {
     fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
+        if !meets_msrv(self.msrv.as_ref(), &FROM_OVER_INTO_MSRV) {
+            return;
+        }
+
         let impl_def_id = cx.tcx.hir().local_def_id(item.hir_id);
         if_chain! {
             if let hir::ItemKind::Impl{ .. } = &item.kind;
@@ -55,9 +73,11 @@ fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
                     item.span,
                     "An implementation of From is preferred since it gives you Into<..> for free where the reverse isn't true.",
                     None,
-                    "consider implement From instead",
+                    "consider to implement From instead",
                 );
             }
         }
     }
+
+    extract_msrv_attr!(LateContext);
 }

clippy_lints/src/lib.rs

@@ -1016,6 +1016,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(move || box checked_conversions::CheckedConversions::new(msrv));
     store.register_late_pass(move || box mem_replace::MemReplace::new(msrv));
     store.register_late_pass(move || box ranges::Ranges::new(msrv));
+    store.register_late_pass(move || box from_over_into::FromOverInto::new(msrv));
     store.register_late_pass(move || box use_self::UseSelf::new(msrv));
     store.register_late_pass(move || box missing_const_for_fn::MissingConstForFn::new(msrv));
 
@@ -1205,7 +1206,6 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| box manual_unwrap_or::ManualUnwrapOr);
     store.register_late_pass(|| box manual_ok_or::ManualOkOr);
     store.register_late_pass(|| box float_equality_without_abs::FloatEqualityWithoutAbs);
-    store.register_late_pass(|| box from_over_into::FromOverInto);
     store.register_late_pass(|| box async_yields_async::AsyncYieldsAsync);
     let disallowed_methods = conf.disallowed_methods.iter().cloned().collect::<FxHashSet<_>>();
     store.register_late_pass(move || box disallowed_method::DisallowedMethod::new(&disallowed_methods));

tests/ui/from_over_into.stderr

@@ -9,7 +9,7 @@ LL | | }
    | |_^
    |
    = note: `-D clippy::from-over-into` implied by `-D warnings`
-   = help: consider implement From instead
+   = help: consider to implement From instead
 
 error: aborting due to previous error
 

tests/ui/min_rust_version_attr.rs

@@ -57,6 +57,14 @@ pub fn checked_conversion() {
     let _ = value <= (u32::MAX as i64) && value >= 0;
 }
 
+pub struct FromOverInto(String);
+
+impl Into<FromOverInto> for String {
+    fn into(self) -> FromOverInto {
+        FromOverInto(self)
+    }
+}
+
 pub fn filter_map_next() {
     let a = ["1", "lol", "3", "NaN", "5"];
 

tests/ui/min_rust_version_attr.stderr

@@ -1,12 +1,12 @@
 error: stripping a prefix manually
-  --> $DIR/min_rust_version_attr.rs:142:24
+  --> $DIR/min_rust_version_attr.rs:150:24
    |
 LL |             assert_eq!(s["hello, ".len()..].to_uppercase(), "WORLD!");
    |                        ^^^^^^^^^^^^^^^^^^^^
    |
    = note: `-D clippy::manual-strip` implied by `-D warnings`
 note: the prefix was tested here
-  --> $DIR/min_rust_version_attr.rs:141:9
+  --> $DIR/min_rust_version_attr.rs:149:9
    |
 LL |         if s.starts_with("hello, ") {
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -17,13 +17,13 @@ LL |             assert_eq!(<stripped>.to_uppercase(), "WORLD!");
    |
 
 error: stripping a prefix manually
-  --> $DIR/min_rust_version_attr.rs:154:24
+  --> $DIR/min_rust_version_attr.rs:162:24
    |
 LL |             assert_eq!(s["hello, ".len()..].to_uppercase(), "WORLD!");
    |                        ^^^^^^^^^^^^^^^^^^^^
    |
 note: the prefix was tested here
-  --> $DIR/min_rust_version_attr.rs:153:9
+  --> $DIR/min_rust_version_attr.rs:161:9
    |
 LL |         if s.starts_with("hello, ") {
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^