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Make overflowing arithmetic const

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Co-Authored-By: 9999years <rbt@sent.as>
This commit is contained in:
Dylan MacKenzie 2020-02-03 12:45:51 -08:00
parent 37c141885a
commit de52a541d5
2 changed files with 9 additions and 4 deletions
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1
src/libcore/lib.rs
View file

@ -74,6 +74,7 @@
#![feature(const_if_match)]
#![feature(const_int_checked)]
#![feature(const_int_euclidean)]
#![feature(const_int_overflowing)]
#![feature(const_panic)]
#![feature(const_fn_union)]
#![feature(const_generics)]

12
src/libcore/num/mod.rs
View file

@ -1646,9 +1646,10 @@ $EndFeature, "
```"),
#[inline]
#[stable(feature = "wrapping", since = "1.7.0")]
#[rustc_const_unstable(feature = "const_int_overflowing", issue = "53718")]
#[must_use = "this returns the result of the operation, \
without modifying the original"]
pub fn overflowing_div(self, rhs: Self) -> (Self, bool) {
pub const fn overflowing_div(self, rhs: Self) -> (Self, bool) {
if self == Self::min_value() && rhs == -1 {
(self, true)
} else {
@ -1715,9 +1716,10 @@ $EndFeature, "
```"),
#[inline]
#[stable(feature = "wrapping", since = "1.7.0")]
#[rustc_const_unstable(feature = "const_int_overflowing", issue = "53718")]
#[must_use = "this returns the result of the operation, \
without modifying the original"]
pub fn overflowing_rem(self, rhs: Self) -> (Self, bool) {
pub const fn overflowing_rem(self, rhs: Self) -> (Self, bool) {
if self == Self::min_value() && rhs == -1 {
(0, true)
} else {
@ -3639,9 +3641,10 @@ Basic usage
```"),
#[inline]
#[stable(feature = "wrapping", since = "1.7.0")]
#[rustc_const_unstable(feature = "const_int_overflowing", issue = "53718")]
#[must_use = "this returns the result of the operation, \
without modifying the original"]
pub fn overflowing_div(self, rhs: Self) -> (Self, bool) {
pub const fn overflowing_div(self, rhs: Self) -> (Self, bool) {
(self / rhs, false)
}
}
@ -3699,9 +3702,10 @@ Basic usage
```"),
#[inline]
#[stable(feature = "wrapping", since = "1.7.0")]
#[rustc_const_unstable(feature = "const_int_overflowing", issue = "53718")]
#[must_use = "this returns the result of the operation, \
without modifying the original"]
pub fn overflowing_rem(self, rhs: Self) -> (Self, bool) {
pub const fn overflowing_rem(self, rhs: Self) -> (Self, bool) {
(self % rhs, false)
}
}