core: Make pointer offset methods "const fn"

Signed-off-by: Joe Richey <joerichey@google.com>

2 files changed, 24 insertions, 12 deletions

diff --git a/src/libcore/ptr/const_ptr.rs b/src/libcore/ptr/const_ptr.rs
index 85ba5fc0638..835183d171a 100644
--- a/src/libcore/ptr/const_ptr.rs
+++ b/src/libcore/ptr/const_ptr.rs
@@ -151,8 +151,9 @@ impl<T: ?Sized> *const T {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub unsafe fn offset(self, count: isize) -> *const T
+    pub const unsafe fn offset(self, count: isize) -> *const T
     where
         T: Sized,
     {
@@ -210,8 +211,9 @@ impl<T: ?Sized> *const T {
     /// ```
     #[stable(feature = "ptr_wrapping_offset", since = "1.16.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub fn wrapping_offset(self, count: isize) -> *const T
+    pub const fn wrapping_offset(self, count: isize) -> *const T
     where
         T: Sized,
     {
@@ -393,8 +395,9 @@ impl<T: ?Sized> *const T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub unsafe fn add(self, count: usize) -> Self
+    pub const unsafe fn add(self, count: usize) -> Self
     where
         T: Sized,
     {
@@ -455,8 +458,9 @@ impl<T: ?Sized> *const T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub unsafe fn sub(self, count: usize) -> Self
+    pub const unsafe fn sub(self, count: usize) -> Self
     where
         T: Sized,
     {
@@ -511,8 +515,9 @@ impl<T: ?Sized> *const T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub fn wrapping_add(self, count: usize) -> Self
+    pub const fn wrapping_add(self, count: usize) -> Self
     where
         T: Sized,
     {
@@ -567,8 +572,9 @@ impl<T: ?Sized> *const T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub fn wrapping_sub(self, count: usize) -> Self
+    pub const fn wrapping_sub(self, count: usize) -> Self
     where
         T: Sized,
     {
diff --git a/src/libcore/ptr/mut_ptr.rs b/src/libcore/ptr/mut_ptr.rs
index 0781d7e6cac..40b5e4e2234 100644
--- a/src/libcore/ptr/mut_ptr.rs
+++ b/src/libcore/ptr/mut_ptr.rs
@@ -145,8 +145,9 @@ impl<T: ?Sized> *mut T {
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub unsafe fn offset(self, count: isize) -> *mut T
+    pub const unsafe fn offset(self, count: isize) -> *mut T
     where
         T: Sized,
     {
@@ -203,8 +204,9 @@ impl<T: ?Sized> *mut T {
     /// ```
     #[stable(feature = "ptr_wrapping_offset", since = "1.16.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub fn wrapping_offset(self, count: isize) -> *mut T
+    pub const fn wrapping_offset(self, count: isize) -> *mut T
     where
         T: Sized,
     {
@@ -439,8 +441,9 @@ impl<T: ?Sized> *mut T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub unsafe fn add(self, count: usize) -> Self
+    pub const unsafe fn add(self, count: usize) -> Self
     where
         T: Sized,
     {
@@ -501,8 +504,9 @@ impl<T: ?Sized> *mut T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub unsafe fn sub(self, count: usize) -> Self
+    pub const unsafe fn sub(self, count: usize) -> Self
     where
         T: Sized,
     {
@@ -557,8 +561,9 @@ impl<T: ?Sized> *mut T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub fn wrapping_add(self, count: usize) -> Self
+    pub const fn wrapping_add(self, count: usize) -> Self
     where
         T: Sized,
     {
@@ -613,8 +618,9 @@ impl<T: ?Sized> *mut T {
     /// ```
     #[stable(feature = "pointer_methods", since = "1.26.0")]
     #[must_use = "returns a new pointer rather than modifying its argument"]
+    #[rustc_const_unstable(feature = "const_ptr_offset", issue = "71499")]
     #[inline]
-    pub fn wrapping_sub(self, count: usize) -> Self
+    pub const fn wrapping_sub(self, count: usize) -> Self
     where
         T: Sized,
     {