Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 145 insertions, 0 deletions

diff --git a/third_party/rust/zerofrom/src/macro_impls.rs b/third_party/rust/zerofrom/src/macro_impls.rs
new file mode 100644
index 0000000000..3bef457e11
--- /dev/null
+++ b/third_party/rust/zerofrom/src/macro_impls.rs
@@ -0,0 +1,145 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+// In this case consistency between impls is more important
+// than using pointer casts
+#![allow(clippy::transmute_ptr_to_ptr)]
+
+use crate::ZeroFrom;
+
+macro_rules! impl_copy_type {
+    ($ty:ident) => {
+        impl<'a> ZeroFrom<'a, $ty> for $ty {
+            #[inline]
+            fn zero_from(this: &'a Self) -> Self {
+                // Essentially only works when the struct is fully Copy
+                *this
+            }
+        }
+    };
+}
+
+impl_copy_type!(u8);
+impl_copy_type!(u16);
+impl_copy_type!(u32);
+impl_copy_type!(u64);
+impl_copy_type!(u128);
+impl_copy_type!(usize);
+impl_copy_type!(i8);
+impl_copy_type!(i16);
+impl_copy_type!(i32);
+impl_copy_type!(i64);
+impl_copy_type!(i128);
+impl_copy_type!(isize);
+impl_copy_type!(char);
+impl_copy_type!(bool);
+
+// This can be cleaned up once `[T; N]`::each_ref() is stabilized
+// https://github.com/rust-lang/rust/issues/76118
+macro_rules! array_zf_impl {
+    ($n:expr; $($i:expr),+) => {
+        impl<'a, C, T: ZeroFrom<'a, C>> ZeroFrom<'a, [C; $n]> for [T; $n] {
+            fn zero_from(this: &'a [C; $n]) -> Self {
+                [
+                    $(
+                        <T as ZeroFrom<C>>::zero_from(&this[$i])
+                    ),+
+
+                ]
+            }
+        }
+    }
+}
+
+array_zf_impl!(1; 0);
+array_zf_impl!(2; 0, 1);
+array_zf_impl!(3; 0, 1, 2);
+array_zf_impl!(4; 0, 1, 2, 3);
+array_zf_impl!(5; 0, 1, 2, 3, 4);
+array_zf_impl!(6; 0, 1, 2, 3, 4, 5);
+array_zf_impl!(7; 0, 1, 2, 3, 4, 5, 6);
+array_zf_impl!(8; 0, 1, 2, 3, 4, 5, 6, 7);
+array_zf_impl!(9; 0, 1, 2, 3, 4, 5, 6, 7, 8);
+array_zf_impl!(10; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
+array_zf_impl!(11; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+array_zf_impl!(12; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11);
+array_zf_impl!(13; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
+array_zf_impl!(14; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13);
+array_zf_impl!(15; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14);
+array_zf_impl!(16; 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
+
+macro_rules! tuple_zf_impl {
+    ($(($c:ident, $t:ident, $i:tt)),+) => {
+        impl<'zf, $($c, $t: ZeroFrom<'zf, $c>),+> ZeroFrom<'zf, ($($c),+)>
+            for ($($t),+)
+            {
+            fn zero_from(other: &'zf ($($c),+)) -> Self {
+                (
+                    $(<$t as ZeroFrom<$c>>::zero_from(&other.$i)),+
+                )
+            }
+        }
+    };
+}
+
+tuple_zf_impl!((C1, T1, 0), (C2, T2, 1));
+tuple_zf_impl!((C1, T1, 0), (C2, T2, 1), (C3, T3, 2));
+tuple_zf_impl!((C1, T1, 0), (C2, T2, 1), (C3, T3, 2), (C4, T4, 3));
+tuple_zf_impl!(
+    (C1, T1, 0),
+    (C2, T2, 1),
+    (C3, T3, 2),
+    (C4, T4, 3),
+    (C5, T5, 4)
+);
+tuple_zf_impl!(
+    (C1, T1, 0),
+    (C2, T2, 1),
+    (C3, T3, 2),
+    (C4, T4, 3),
+    (C5, T5, 4),
+    (C6, T6, 5)
+);
+tuple_zf_impl!(
+    (C1, T1, 0),
+    (C2, T2, 1),
+    (C3, T3, 2),
+    (C4, T4, 3),
+    (C5, T5, 4),
+    (C6, T6, 5),
+    (C7, T7, 6)
+);
+tuple_zf_impl!(
+    (C1, T1, 0),
+    (C2, T2, 1),
+    (C3, T3, 2),
+    (C4, T4, 3),
+    (C5, T5, 4),
+    (C6, T6, 5),
+    (C7, T7, 6),
+    (C8, T8, 7)
+);
+tuple_zf_impl!(
+    (C1, T1, 0),
+    (C2, T2, 1),
+    (C3, T3, 2),
+    (C4, T4, 3),
+    (C5, T5, 4),
+    (C6, T6, 5),
+    (C7, T7, 6),
+    (C8, T8, 7),
+    (C9, T9, 8)
+);
+tuple_zf_impl!(
+    (C1, T1, 0),
+    (C2, T2, 1),
+    (C3, T3, 2),
+    (C4, T4, 3),
+    (C5, T5, 4),
+    (C6, T6, 5),
+    (C7, T7, 6),
+    (C8, T8, 7),
+    (C9, T9, 8),
+    (C10, T10, 9)
+);