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Rollup merge of #103570 - lukas-code:stabilize-ilog, r=scottmcm
Stabilize integer logarithms Stabilizes feature `int_log`. I've also made the functions const stable, because they don't depend on any unstable const features. `rustc_allow_const_fn_unstable` is just there for `Option::expect`, which could be replaced with a `match` and `panic!`. cc ``@rust-lang/wg-const-eval`` closes #70887 (tracking issue) ~~blocked on FCP finishing: #70887 (comment) FCP finished: #70887 (comment)
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7 files changed

+36
-34
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‎library/core/benches/lib.rs‎

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// wasm32 does not support benches (no time).
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#![cfg(not(target_arch = "wasm32"))]
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#![feature(flt2dec)]
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#![feature(int_log)]
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#![feature(test)]
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#![feature(trusted_random_access)]
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#![feature(iter_array_chunks)]

‎library/core/src/num/int_macros.rs‎

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@@ -2271,15 +2271,16 @@ macro_rules! int_impl {
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/// # Panics
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///
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/// This function will panic if `self` is less than or equal to zero,
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/// or if `base` is less then 2.
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/// or if `base` is less than 2.
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///
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(5", stringify!($SelfT), ".ilog(5), 1);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_allow_const_fn_unstable(const_option)]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(2", stringify!($SelfT), ".ilog2(), 1);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_allow_const_fn_unstable(const_option)]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Example
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(10", stringify!($SelfT), ".ilog10(), 1);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_allow_const_fn_unstable(const_option)]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(5", stringify!($SelfT), ".checked_ilog(5), Some(1));")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(2", stringify!($SelfT), ".checked_ilog2(), Some(1));")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Example
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(10", stringify!($SelfT), ".checked_ilog10(), Some(1));")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]

‎library/core/src/num/nonzero.rs‎

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@@ -460,14 +460,14 @@ macro_rules! nonzero_unsigned_operations {
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("# use std::num::", stringify!($Ty), ";")]
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///
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#[doc = concat!("assert_eq!(", stringify!($Ty), "::new(7).unwrap().ilog2(), 2);")]
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#[doc = concat!("assert_eq!(", stringify!($Ty), "::new(8).unwrap().ilog2(), 3);")]
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#[doc = concat!("assert_eq!(", stringify!($Ty), "::new(9).unwrap().ilog2(), 3);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("# use std::num::", stringify!($Ty), ";")]
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///
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#[doc = concat!("assert_eq!(", stringify!($Ty), "::new(99).unwrap().ilog10(), 1);")]
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#[doc = concat!("assert_eq!(", stringify!($Ty), "::new(100).unwrap().ilog10(), 2);")]
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#[doc = concat!("assert_eq!(", stringify!($Ty), "::new(101).unwrap().ilog10(), 2);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]

‎library/core/src/num/uint_macros.rs‎

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@@ -692,15 +692,16 @@ macro_rules! uint_impl {
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///
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/// # Panics
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///
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/// This function will panic if `self` is zero, or if `base` is less then 2.
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/// This function will panic if `self` is zero, or if `base` is less than 2.
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///
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(5", stringify!($SelfT), ".ilog(5), 1);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_allow_const_fn_unstable(const_option)]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(2", stringify!($SelfT), ".ilog2(), 1);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_allow_const_fn_unstable(const_option)]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Example
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(10", stringify!($SelfT), ".ilog10(), 1);")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_allow_const_fn_unstable(const_option)]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(5", stringify!($SelfT), ".checked_ilog(5), Some(1));")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(2", stringify!($SelfT), ".checked_ilog2(), Some(1));")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]
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/// # Examples
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///
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/// ```
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/// #![feature(int_log)]
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#[doc = concat!("assert_eq!(10", stringify!($SelfT), ".checked_ilog10(), Some(1));")]
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/// ```
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#[unstable(feature = "int_log", issue = "70887")]
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#[stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[rustc_const_stable(feature = "int_log", since = "CURRENT_RUSTC_VERSION")]
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#[must_use = "this returns the result of the operation, \
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without modifying the original"]
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#[inline]

‎library/core/tests/lib.rs‎

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#![feature(try_trait_v2)]
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#![feature(slice_internals)]
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#![feature(slice_partition_dedup)]
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#![feature(int_log)]
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#![feature(iter_advance_by)]
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#![feature(iter_array_chunks)]
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#![feature(iter_collect_into)]

‎src/tools/miri/src/lib.rs‎

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#![feature(never_type)]
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#![feature(try_blocks)]
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#![feature(io_error_more)]
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#![feature(int_log)]
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#![feature(variant_count)]
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#![feature(yeet_expr)]
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#![feature(is_some_and)]

‎src/tools/miri/tests/pass/integer-ops.rs‎

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//@compile-flags: -Coverflow-checks=off
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#![feature(int_log)]
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#![allow(arithmetic_overflow)]
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pub fn main() {

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