run cargo dev new_lint then move transmutes_expressible_as_ptr_casts into transmute module

Author: Ryan1729

src/tools/clippy/CHANGELOG.md

@@ -1730,6 +1730,7 @@ Released 2018-09-13
 [`transmute_int_to_float`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_int_to_float
 [`transmute_ptr_to_ptr`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
 [`transmute_ptr_to_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ref
+[`transmutes_expressible_as_ptr_casts`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmutes_expressible_as_ptr_casts
 [`transmuting_null`]: https://rust-lang.github.io/rust-clippy/master/index.html#transmuting_null
 [`trivial_regex`]: https://rust-lang.github.io/rust-clippy/master/index.html#trivial_regex
 [`trivially_copy_pass_by_ref`]: https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref

src/tools/clippy/clippy_lints/src/lib.rs

@@ -798,6 +798,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         &transmute::UNSOUND_COLLECTION_TRANSMUTE,
         &transmute::USELESS_TRANSMUTE,
         &transmute::WRONG_TRANSMUTE,
+        &transmute::TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS,
         &transmuting_null::TRANSMUTING_NULL,
         &trivially_copy_pass_by_ref::TRIVIALLY_COPY_PASS_BY_REF,
         &try_err::TRY_ERR,
@@ -1426,6 +1427,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&transmute::TRANSMUTE_PTR_TO_REF),
         LintId::of(&transmute::UNSOUND_COLLECTION_TRANSMUTE),
         LintId::of(&transmute::WRONG_TRANSMUTE),
+        LintId::of(&transmute::TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS),
         LintId::of(&transmuting_null::TRANSMUTING_NULL),
         LintId::of(&try_err::TRY_ERR),
         LintId::of(&types::ABSURD_EXTREME_COMPARISONS),
@@ -1624,6 +1626,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
         LintId::of(&transmute::TRANSMUTE_INT_TO_FLOAT),
         LintId::of(&transmute::TRANSMUTE_PTR_TO_PTR),
         LintId::of(&transmute::TRANSMUTE_PTR_TO_REF),
+        LintId::of(&transmute::TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS),
         LintId::of(&types::BORROWED_BOX),
         LintId::of(&types::CHAR_LIT_AS_U8),
         LintId::of(&types::TYPE_COMPLEXITY),

src/tools/clippy/clippy_lints/src/transmute.rs

@@ -269,6 +269,28 @@ declare_clippy_lint! {
     correctness,
     "transmute between collections of layout-incompatible types"
 }
+
+declare_clippy_lint! {
+    /// **What it does:**
+    ///
+    /// **Why is this bad?**
+    ///
+    /// **Known problems:** None.
+    ///
+    /// **Example:**
+    ///
+    /// ```rust
+    /// // example code where clippy issues a warning
+    /// ```
+    /// Use instead:
+    /// ```rust
+    /// // example code which does not raise clippy warning
+    /// ```
+    pub TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS,
+    complexity,
+    "default lint description"
+}
+
 declare_lint_pass!(Transmute => [
     CROSSPOINTER_TRANSMUTE,
     TRANSMUTE_PTR_TO_REF,
@@ -281,6 +303,7 @@ declare_lint_pass!(Transmute => [
     TRANSMUTE_INT_TO_FLOAT,
     TRANSMUTE_FLOAT_TO_INT,
     UNSOUND_COLLECTION_TRANSMUTE,
+    TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS,
 ]);
 
 // used to check for UNSOUND_COLLECTION_TRANSMUTE

src/tools/clippy/src/lintlist/mod.rs

@@ -2215,6 +2215,13 @@ pub static ref ALL_LINTS: Vec<Lint> = vec![
         deprecation: None,
         module: "transmute",
     },
+    Lint {
+        name: "transmutes_expressible_as_ptr_casts",
+        group: "complexity",
+        desc: "default lint description",
+        deprecation: None,
+        module: "transmute",
+    },
     Lint {
         name: "transmuting_null",
         group: "correctness",

src/tools/clippy/tests/ui/transmutes_expressible_as_ptr_casts.rs

@@ -0,0 +1,5 @@
+#![warn(clippy::transmutes_expressible_as_ptr_casts)]
+
+fn main() {
+    // test code goes here
+}