1 files changed, 123 insertions, 0 deletions
diff --git a/vendor/deranged/src/traits.rs b/vendor/deranged/src/traits.rs
new file mode 100644
index 00000000..505b66de
--- /dev/null
+++ b/vendor/deranged/src/traits.rs
@@ -0,0 +1,123 @@
+//! Declaration and implementation of traits used for const assertions.
+
+use crate::{
+    RangedI128, RangedI16, RangedI32, RangedI64, RangedI8, RangedIsize, RangedU128, RangedU16,
+    RangedU32, RangedU64, RangedU8, RangedUsize,
+};
+
+/// Declare a series of traits that will be used for const assertions.
+macro_rules! declare_traits {
+    ($($trait_name:ident),* $(,)?) => {$(
+        pub(crate) trait $trait_name {
+            const ASSERT: ();
+        }
+    )*};
+}
+
+/// Implements traits that are common to all integer types.
+macro_rules! impl_traits_for_all {
+    ($($ranged_ty:ident $inner_ty:ident),* $(,)?) => {$(
+        impl<const MIN: $inner_ty, const MAX: $inner_ty> RangeIsValid for $ranged_ty<MIN, MAX> {
+            const ASSERT: () = assert!(MIN <= MAX);
+        }
+
+        impl<
+            const CURRENT_MIN: $inner_ty,
+            const CURRENT_MAX: $inner_ty,
+            const NEW_MIN: $inner_ty,
+            const NEW_MAX: $inner_ty,
+        > ExpandIsValid for ($ranged_ty<CURRENT_MIN, CURRENT_MAX>, $ranged_ty<NEW_MIN, NEW_MAX>) {
+            const ASSERT: () = {
+                assert!(NEW_MIN <= CURRENT_MIN);
+                assert!(NEW_MAX >= CURRENT_MAX);
+            };
+        }
+
+        impl<
+            const CURRENT_MIN: $inner_ty,
+            const CURRENT_MAX: $inner_ty,
+            const NEW_MIN: $inner_ty,
+            const NEW_MAX: $inner_ty,
+        > NarrowIsValid for ($ranged_ty<CURRENT_MIN, CURRENT_MAX>, $ranged_ty<NEW_MIN, NEW_MAX>) {
+            const ASSERT: () = {
+                assert!(NEW_MIN >= CURRENT_MIN);
+                assert!(NEW_MAX <= CURRENT_MAX);
+            };
+        }
+
+        impl<
+            const VALUE: $inner_ty,
+            const MIN: $inner_ty,
+            const MAX: $inner_ty,
+        > StaticIsValid for ($ranged_ty<MIN, VALUE>, $ranged_ty<VALUE, MAX>) {
+            const ASSERT: () = {
+                assert!(VALUE >= MIN);
+                assert!(VALUE <= MAX);
+            };
+        }
+    )*};
+}
+
+/// Implement traits that are common to all signed integer types.
+macro_rules! impl_traits_for_signed {
+    ($($ranged_ty:ident $inner_ty:ident),* $(,)?) => {$(
+        impl<const MIN: $inner_ty, const MAX: $inner_ty> AbsIsSafe for $ranged_ty<MIN, MAX> {
+            const ASSERT: () = {
+                assert!(MIN != <$inner_ty>::MIN);
+                assert!(-MIN <= MAX);
+            };
+        }
+
+        impl<const MIN: $inner_ty, const MAX: $inner_ty> NegIsSafe for $ranged_ty<MIN, MAX> {
+            const ASSERT: () = {
+                assert!(MIN != <$inner_ty>::MIN);
+                assert!(-MIN <= MAX);
+                assert!(-MAX >= MIN);
+            };
+        }
+
+        impl_traits_for_all!($ranged_ty $inner_ty);
+    )*};
+}
+
+/// Implement traits that are common to all unsigned integer types.
+macro_rules! impl_traits_for_unsigned {
+    ($($ranged_ty:ident $inner_ty:ident),* $(,)?) => {$(
+        impl<const MIN: $inner_ty, const MAX: $inner_ty> AbsIsSafe for $ranged_ty<MIN, MAX> {
+            const ASSERT: () = ();
+        }
+
+        impl<const MIN: $inner_ty, const MAX: $inner_ty> NegIsSafe for $ranged_ty<MIN, MAX> {
+            const ASSERT: () = assert!(MAX == 0);
+        }
+
+        impl_traits_for_all!($ranged_ty $inner_ty);
+    )*};
+}
+
+declare_traits![
+    RangeIsValid,
+    AbsIsSafe,
+    NegIsSafe,
+    ExpandIsValid,
+    NarrowIsValid,
+    StaticIsValid,
+];
+
+impl_traits_for_signed! {
+    RangedI8 i8,
+    RangedI16 i16,
+    RangedI32 i32,
+    RangedI64 i64,
+    RangedI128 i128,
+    RangedIsize isize,
+}
+
+impl_traits_for_unsigned! {
+    RangedU8 u8,
+    RangedU16 u16,
+    RangedU32 u32,
+    RangedU64 u64,
+    RangedU128 u128,
+    RangedUsize usize,
+}