diff --git a/src/ast/expr.rs b/src/ast/expr.rs
index e50e5086..3ec16433 100644
--- a/src/ast/expr.rs
+++ b/src/ast/expr.rs
@@ -286,7 +286,7 @@ impl<F: Float + FromStr> FromStr for FloatWrapper<F> {
 
     #[inline]
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        F::from_str(s).map(Into::<Self>::into)
+        F::from_str(s).map(Into::into)
     }
 }
 
diff --git a/src/custom_syntax.rs b/src/custom_syntax.rs
index 95ec521a..2cc109c6 100644
--- a/src/custom_syntax.rs
+++ b/src/custom_syntax.rs
@@ -211,9 +211,9 @@ impl Engine {
     /// Replacing one variable with another (i.e. adding a new variable and removing one variable at
     /// the same time so that the total _size_ of the [`Scope`][crate::Scope] is unchanged) also
     /// does NOT count, so `false` should be passed.
-    pub fn register_custom_syntax<S: AsRef<str> + Into<Identifier>>(
+    pub fn register_custom_syntax(
         &mut self,
-        symbols: &[S],
+        symbols: &[impl AsRef<str> + Into<Identifier>],
         scope_may_be_changed: bool,
         func: impl Fn(&mut EvalContext, &[Expression]) -> RhaiResult + SendSync + 'static,
     ) -> ParseResult<&mut Self> {
diff --git a/src/func/builtin.rs b/src/func/builtin.rs
index 3375f243..e1320e3d 100644
--- a/src/func/builtin.rs
+++ b/src/func/builtin.rs
@@ -89,7 +89,7 @@ pub fn get_builtin_binary_op_fn(op: &str, x: &Dynamic, y: &Dynamic) -> Option<Fn
         ($base:ty => $func:ident ( $xx:ident, $yy:ident )) => { |_, args| {
             let x = args[0].$xx().expect(BUILTIN) as $base;
             let y = args[1].$yy().expect(BUILTIN) as $base;
-            $func(x, y).map(Into::<Dynamic>::into)
+            $func(x, y).map(Into::into)
         } };
         (from $base:ty => $xx:ident $op:tt $yy:ident) => { |_, args| {
             let x = <$base>::from(args[0].$xx().expect(BUILTIN));
@@ -104,7 +104,7 @@ pub fn get_builtin_binary_op_fn(op: &str, x: &Dynamic, y: &Dynamic) -> Option<Fn
         (from $base:ty => $func:ident ( $xx:ident, $yy:ident )) => { |_, args| {
             let x = <$base>::from(args[0].$xx().expect(BUILTIN));
             let y = <$base>::from(args[1].$yy().expect(BUILTIN));
-            $func(x, y).map(Into::<Dynamic>::into)
+            $func(x, y).map(Into::into)
         } };
     }
 
diff --git a/src/func/call.rs b/src/func/call.rs
index 3090a35b..90f27913 100644
--- a/src/func/call.rs
+++ b/src/func/call.rs
@@ -967,7 +967,7 @@ impl Engine {
                     .into_immutable_string()
                     .map_err(|typ| self.make_type_mismatch_err::<ImmutableString>(typ, arg_pos))
                     .and_then(FnPtr::try_from)
-                    .map(Into::<Dynamic>::into)
+                    .map(Into::into)
                     .map_err(|err| err.fill_position(arg_pos));
             }
 
diff --git a/src/packages/fn_basic.rs b/src/packages/fn_basic.rs
index fa6f33f2..6037761f 100644
--- a/src/packages/fn_basic.rs
+++ b/src/packages/fn_basic.rs
@@ -71,7 +71,7 @@ fn collect_fn_metadata(ctx: NativeCallContext) -> crate::Array {
             f.params
                 .iter()
                 .cloned()
-                .map(Into::<Dynamic>::into)
+                .map(Into::into)
                 .collect::<Array>()
                 .into(),
         );
diff --git a/src/packages/map_basic.rs b/src/packages/map_basic.rs
index a1f2fa5d..525ce5c0 100644
--- a/src/packages/map_basic.rs
+++ b/src/packages/map_basic.rs
@@ -102,7 +102,7 @@ mod map_functions {
         if map.is_empty() {
             Array::new()
         } else {
-            map.keys().cloned().map(Into::<Dynamic>::into).collect()
+            map.keys().cloned().map(Into::into).collect()
         }
     }
     #[cfg(not(feature = "no_index"))]
diff --git a/src/packages/string_more.rs b/src/packages/string_more.rs
index dfaf047c..7ec7af76 100644
--- a/src/packages/string_more.rs
+++ b/src/packages/string_more.rs
@@ -599,7 +599,7 @@ mod string_functions {
             if string.is_empty() {
                 Array::new()
             } else {
-                string.chars().map(Into::<Dynamic>::into).collect()
+                string.chars().map(Into::into).collect()
             }
         }
         #[rhai_fn(name = "split")]
@@ -624,57 +624,39 @@ mod string_functions {
             }
         }
         pub fn split(string: &str, delimiter: &str) -> Array {
-            string.split(delimiter).map(Into::<Dynamic>::into).collect()
+            string.split(delimiter).map(Into::into).collect()
         }
         #[rhai_fn(name = "split")]
         pub fn splitn(string: &str, delimiter: &str, segments: INT) -> Array {
             let pieces: usize = if segments < 1 { 1 } else { segments as usize };
-            string
-                .splitn(pieces, delimiter)
-                .map(Into::<Dynamic>::into)
-                .collect()
+            string.splitn(pieces, delimiter).map(Into::into).collect()
         }
         #[rhai_fn(name = "split")]
         pub fn split_char(string: &str, delimiter: char) -> Array {
-            string.split(delimiter).map(Into::<Dynamic>::into).collect()
+            string.split(delimiter).map(Into::into).collect()
         }
         #[rhai_fn(name = "split")]
         pub fn splitn_char(string: &str, delimiter: char, segments: INT) -> Array {
             let pieces: usize = if segments < 1 { 1 } else { segments as usize };
-            string
-                .splitn(pieces, delimiter)
-                .map(Into::<Dynamic>::into)
-                .collect()
+            string.splitn(pieces, delimiter).map(Into::into).collect()
         }
         #[rhai_fn(name = "split_rev")]
         pub fn rsplit(string: &str, delimiter: &str) -> Array {
-            string
-                .rsplit(delimiter)
-                .map(Into::<Dynamic>::into)
-                .collect()
+            string.rsplit(delimiter).map(Into::into).collect()
         }
         #[rhai_fn(name = "split_rev")]
         pub fn rsplitn(string: &str, delimiter: &str, segments: INT) -> Array {
             let pieces: usize = if segments < 1 { 1 } else { segments as usize };
-            string
-                .rsplitn(pieces, delimiter)
-                .map(Into::<Dynamic>::into)
-                .collect()
+            string.rsplitn(pieces, delimiter).map(Into::into).collect()
         }
         #[rhai_fn(name = "split_rev")]
         pub fn rsplit_char(string: &str, delimiter: char) -> Array {
-            string
-                .rsplit(delimiter)
-                .map(Into::<Dynamic>::into)
-                .collect()
+            string.rsplit(delimiter).map(Into::into).collect()
         }
         #[rhai_fn(name = "split_rev")]
         pub fn rsplitn_char(string: &str, delimiter: char, segments: INT) -> Array {
             let pieces: usize = if segments < 1 { 1 } else { segments as usize };
-            string
-                .rsplitn(pieces, delimiter)
-                .map(Into::<Dynamic>::into)
-                .collect()
+            string.rsplitn(pieces, delimiter).map(Into::into).collect()
         }
     }
 }