Rollup merge of #73858 - tspiteri:const-methods, r=oli-obk

Make more primitive integer methods const

Now that #72437 has been merged and `const_if_match` is stable, these methods can be stabilized const. The methods are grouped in commits according to feature names:

* `const_nonzero_int_methods`
    - `NonZero*::new`
* some `const_checked_int_methods`
    - `{i*,u*}::checked_add`
    - `{i*,u*}::checked_sub`
    - `{i*,u*}::checked_mul`
    - `{i*,u*}::checked_neg`
    - `{i*,u*}::checked_shl`
    - `{i*,u*}::checked_shr`
    - `i*::checked_abs`
* `const_saturating_int_methods`
    - `{i*,u*}::saturating_add`
    - `{i*,u*}::saturating_sub`
    - `{i*,u*}::saturating_mul`
    - `i*::saturating_neg`
    - `i*::saturating_abs`
* `const_int_sign`
    - `i*::signum`
* `const_ascii_ctype_on_intrinsics`
    - `{char,u8}::is_ascii_alphabetic`
    - `{char,u8}::is_ascii_uppercase`
    - `{char,u8}::is_ascii_lowercase`
    - `{char,u8}::is_ascii_alphanumeric`
    - `{char,u8}::is_ascii_digit`
    - `{char,u8}::is_ascii_hexdigit`
    - `{char,u8}::is_ascii_punctuation`
    - `{char,u8}::is_ascii_graphic`
    - `{char,u8}::is_ascii_whitespace`
    - `{char,u8}::is_ascii_control`

5 files changed, 0 insertions, 8 deletions

diff --git a/src/test/ui/consts/ascii_ctype.rs b/src/test/ui/consts/ascii_ctype.rs
index 25b270ee49c..ef2f7322f27 100644
--- a/src/test/ui/consts/ascii_ctype.rs
+++ b/src/test/ui/consts/ascii_ctype.rs
@@ -1,7 +1,5 @@
 // run-pass
 
-#![feature(const_ascii_ctype_on_intrinsics)]
-
 macro_rules! suite {
     ( $( $fn:ident => [$a:ident, $A:ident, $nine:ident, $dot:ident, $space:ident]; )* ) => {
         $(
diff --git a/src/test/ui/consts/const-int-arithmetic.rs b/src/test/ui/consts/const-int-arithmetic.rs
index 9c94551f744..9b2e30961aa 100644
--- a/src/test/ui/consts/const-int-arithmetic.rs
+++ b/src/test/ui/consts/const-int-arithmetic.rs
@@ -3,7 +3,6 @@
 #![feature(const_checked_int_methods)]
 #![feature(const_euclidean_int_methods)]
 #![feature(const_overflowing_int_methods)]
-#![feature(const_saturating_int_methods)]
 #![feature(const_wrapping_int_methods)]
 
 use std::{i8, i128};
diff --git a/src/test/ui/consts/const-int-saturating-arith.rs b/src/test/ui/consts/const-int-saturating-arith.rs
index 4718120a51b..7edbdd4cec5 100644
--- a/src/test/ui/consts/const-int-saturating-arith.rs
+++ b/src/test/ui/consts/const-int-saturating-arith.rs
@@ -1,5 +1,4 @@
 // run-pass
-#![feature(const_saturating_int_methods)]
 
 const INT_U32_NO: u32 = (42 as u32).saturating_add(2);
 const INT_U32: u32 = u32::MAX.saturating_add(1);
diff --git a/src/test/ui/consts/const-int-sign-rpass.rs b/src/test/ui/consts/const-int-sign-rpass.rs
index dc46fce39a9..63c191d4227 100644
--- a/src/test/ui/consts/const-int-sign-rpass.rs
+++ b/src/test/ui/consts/const-int-sign-rpass.rs
@@ -1,7 +1,5 @@
 // run-pass
 
-#![feature(const_int_sign)]
-
 const NEGATIVE_A: bool = (-10i32).is_negative();
 const NEGATIVE_B: bool = 10i32.is_negative();
 const POSITIVE_A: bool = (-10i32).is_positive();
diff --git a/src/test/ui/consts/const-nonzero.rs b/src/test/ui/consts/const-nonzero.rs
index 2160bad4807..cf6f8c8d69a 100644
--- a/src/test/ui/consts/const-nonzero.rs
+++ b/src/test/ui/consts/const-nonzero.rs
@@ -1,7 +1,5 @@
 // run-pass
 
-#![feature(const_nonzero_int_methods)]
-
 use std::num::NonZeroU8;
 
 const X: NonZeroU8 = unsafe { NonZeroU8::new_unchecked(5) };