Use Self instead of $type

src/libcore/convert/num.rs

@@ -47,8 +47,8 @@ macro_rules! impl_from {
         #[doc = $doc]
         impl From<$Small> for $Large {
             #[inline]
-            fn from(small: $Small) -> $Large {
-                small as $Large
+            fn from(small: $Small) -> Self {
+                small as Self
             }
         }
     };
@@ -177,7 +177,7 @@ macro_rules! try_from_unbounded {
             /// is outside of the range of the target type.
             #[inline]
             fn try_from(value: $source) -> Result<Self, Self::Error> {
-                Ok(value as $target)
+                Ok(value as Self)
             }
         }
     )*}
@@ -194,9 +194,9 @@ macro_rules! try_from_lower_bounded {
             /// number type. This returns an error if the source value
             /// is outside of the range of the target type.
             #[inline]
-            fn try_from(u: $source) -> Result<$target, TryFromIntError> {
+            fn try_from(u: $source) -> Result<Self, Self::Error> {
                 if u >= 0 {
-                    Ok(u as $target)
+                    Ok(u as Self)
                 } else {
                     Err(TryFromIntError(()))
                 }
@@ -216,11 +216,11 @@ macro_rules! try_from_upper_bounded {
             /// number type. This returns an error if the source value
             /// is outside of the range of the target type.
             #[inline]
-            fn try_from(u: $source) -> Result<$target, TryFromIntError> {
-                if u > (<$target>::max_value() as $source) {
+            fn try_from(u: $source) -> Result<Self, Self::Error> {
+                if u > (Self::max_value() as $source) {
                     Err(TryFromIntError(()))
                 } else {
-                    Ok(u as $target)
+                    Ok(u as Self)
                 }
             }
         }
@@ -238,13 +238,13 @@ macro_rules! try_from_both_bounded {
             /// number type. This returns an error if the source value
             /// is outside of the range of the target type.
             #[inline]
-            fn try_from(u: $source) -> Result<$target, TryFromIntError> {
-                let min = <$target>::min_value() as $source;
-                let max = <$target>::max_value() as $source;
+            fn try_from(u: $source) -> Result<Self, Self::Error> {
+                let min = Self::min_value() as $source;
+                let max = Self::max_value() as $source;
                 if u < min || u > max {
                     Err(TryFromIntError(()))
                 } else {
-                    Ok(u as $target)
+                    Ok(u as Self)
                 }
             }
         }
@@ -385,10 +385,10 @@ macro_rules! nzint_impl_from {
         #[doc = $doc]
         impl From<$Small> for $Large {
             #[inline]
-            fn from(small: $Small) -> $Large {
+            fn from(small: $Small) -> Self {
                 // SAFETY: input type guarantees the value is non-zero
                 unsafe {
-                    <$Large>::new_unchecked(small.get().into())
+                    Self::new_unchecked(small.get().into())
                 }
             }
         }

src/libcore/fmt/num.rs

@@ -24,8 +24,8 @@ trait Int:
 
 macro_rules! doit {
     ($($t:ident)*) => ($(impl Int for $t {
-        fn zero() -> $t { 0 }
-        fn from_u8(u: u8) -> $t { u as $t }
+        fn zero() -> Self { 0 }
+        fn from_u8(u: u8) -> Self { u as Self }
         fn to_u8(&self) -> u8 { *self as u8 }
         fn to_u16(&self) -> u16 { *self as u16 }
         fn to_u32(&self) -> u32 { *self as u32 }

src/libcore/iter/traits/accum.rs

@@ -44,28 +44,28 @@ macro_rules! integer_sum_product {
     (@impls $zero:expr, $one:expr, #[$attr:meta], $($a:ty)*) => ($(
         #[$attr]
         impl Sum for $a {
-            fn sum<I: Iterator<Item=$a>>(iter: I) -> $a {
+            fn sum<I: Iterator<Item=Self>>(iter: I) -> Self {
                 iter.fold($zero, Add::add)
             }
         }
 
         #[$attr]
         impl Product for $a {
-            fn product<I: Iterator<Item=$a>>(iter: I) -> $a {
+            fn product<I: Iterator<Item=Self>>(iter: I) -> Self {
                 iter.fold($one, Mul::mul)
             }
         }
 
         #[$attr]
         impl<'a> Sum<&'a $a> for $a {
-            fn sum<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
+            fn sum<I: Iterator<Item=&'a Self>>(iter: I) -> Self {
                 iter.fold($zero, Add::add)
             }
         }
 
         #[$attr]
         impl<'a> Product<&'a $a> for $a {
-            fn product<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
+            fn product<I: Iterator<Item=&'a Self>>(iter: I) -> Self {
                 iter.fold($one, Mul::mul)
             }
         }
@@ -84,28 +84,28 @@ macro_rules! float_sum_product {
     ($($a:ident)*) => ($(
         #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl Sum for $a {
-            fn sum<I: Iterator<Item=$a>>(iter: I) -> $a {
+            fn sum<I: Iterator<Item=Self>>(iter: I) -> Self {
                 iter.fold(0.0, Add::add)
             }
         }
 
         #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl Product for $a {
-            fn product<I: Iterator<Item=$a>>(iter: I) -> $a {
+            fn product<I: Iterator<Item=Self>>(iter: I) -> Self {
                 iter.fold(1.0, Mul::mul)
             }
         }
 
         #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl<'a> Sum<&'a $a> for $a {
-            fn sum<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
+            fn sum<I: Iterator<Item=&'a Self>>(iter: I) -> Self {
                 iter.fold(0.0, Add::add)
             }
         }
 
         #[stable(feature = "iter_arith_traits", since = "1.12.0")]
         impl<'a> Product<&'a $a> for $a {
-            fn product<I: Iterator<Item=&'a $a>>(iter: I) -> $a {
+            fn product<I: Iterator<Item=&'a Self>>(iter: I) -> Self {
                 iter.fold(1.0, Mul::mul)
             }
         }

src/libcore/marker.rs

@@ -505,15 +505,15 @@ macro_rules! impls {
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl<T: ?Sized> Clone for $t<T> {
-            fn clone(&self) -> $t<T> {
-                $t
+            fn clone(&self) -> Self {
+                Self
             }
         }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl<T: ?Sized> Default for $t<T> {
-            fn default() -> $t<T> {
-                $t
+            fn default() -> Self {
+                Self
             }
         }
 

src/libcore/num/bignum.rs

@@ -455,8 +455,8 @@ macro_rules! define_bignum {
         }
 
         impl crate::clone::Clone for $name {
-            fn clone(&self) -> $name {
-                $name { size: self.size, base: self.base }
+            fn clone(&self) -> Self {
+                Self { size: self.size, base: self.base }
             }
         }
 

src/test/ui/issues/issue-8460.rs

@@ -11,8 +11,8 @@ trait Int {
 }
 macro_rules! doit {
     ($($t:ident)*) => ($(impl Int for $t {
-        fn zero() -> $t { 0 }
-        fn one() -> $t { 1 }
+        fn zero() -> Self { 0 }
+        fn one() -> Self { 1 }
     })*)
 }
 doit! { i8 i16 i32 i64 isize }