chore: add vendor dependencies for kauma build

vendor/bitflags/src/internal.rs

@@ -0,0 +1,125 @@
+//! Generate the internal `bitflags`-facing flags type.
+//!
+//! The code generated here is owned by `bitflags`, but still part of its public API.
+//! Changes to the types generated here need to be considered like any other public API change.
+
+/// Declare the `bitflags`-facing bitflags struct.
+///
+/// This type is part of the `bitflags` crate's public API, but not part of the user's.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __declare_internal_bitflags {
+    (
+        $vis:vis struct $InternalBitFlags:ident: $T:ty
+    ) => {
+        // NOTE: The ABI of this type is _guaranteed_ to be the same as `T`
+        // This is relied on by some external libraries like `bytemuck` to make
+        // its `unsafe` trait impls sound.
+        #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+        #[repr(transparent)]
+        $vis struct $InternalBitFlags($T);
+    };
+}
+
+/// Implement functions on the private (bitflags-facing) bitflags type.
+///
+/// Methods and trait implementations can be freely added here without breaking end-users.
+/// If we want to expose new functionality to `#[derive]`, this is the place to do it.
+#[macro_export]
+#[doc(hidden)]
+macro_rules! __impl_internal_bitflags {
+    (
+        $InternalBitFlags:ident: $T:ty, $PublicBitFlags:ident {
+            $(
+                $(#[$inner:ident $($args:tt)*])*
+                const $Flag:tt = $value:expr;
+            )*
+        }
+    ) => {
+        // NOTE: This impl is also used to prevent using bits types from non-primitive types
+        // in the `bitflags` macro. If this approach is changed, this guard will need to be
+        // retained somehow
+        impl $crate::__private::PublicFlags for $PublicBitFlags {
+            type Primitive = $T;
+            type Internal = $InternalBitFlags;
+        }
+
+        impl $crate::__private::core::default::Default for $InternalBitFlags {
+            #[inline]
+            fn default() -> Self {
+                $InternalBitFlags::empty()
+            }
+        }
+
+        impl $crate::__private::core::fmt::Debug for $InternalBitFlags {
+            fn fmt(&self, f: &mut $crate::__private::core::fmt::Formatter<'_>) -> $crate::__private::core::fmt::Result {
+                if self.is_empty() {
+                    // If no flags are set then write an empty hex flag to avoid
+                    // writing an empty string. In some contexts, like serialization,
+                    // an empty string is preferable, but it may be unexpected in
+                    // others for a format not to produce any output.
+                    //
+                    // We can remove this `0x0` and remain compatible with `FromStr`,
+                    // because an empty string will still parse to an empty set of flags,
+                    // just like `0x0` does.
+                    $crate::__private::core::write!(f, "{:#x}", <$T as $crate::Bits>::EMPTY)
+                } else {
+                    $crate::__private::core::fmt::Display::fmt(self, f)
+                }
+            }
+        }
+
+        impl $crate::__private::core::fmt::Display for $InternalBitFlags {
+            fn fmt(&self, f: &mut $crate::__private::core::fmt::Formatter<'_>) -> $crate::__private::core::fmt::Result {
+                $crate::parser::to_writer(&$PublicBitFlags(*self), f)
+            }
+        }
+
+        impl $crate::__private::core::str::FromStr for $InternalBitFlags {
+            type Err = $crate::parser::ParseError;
+
+            fn from_str(s: &str) -> $crate::__private::core::result::Result<Self, Self::Err> {
+                $crate::parser::from_str::<$PublicBitFlags>(s).map(|flags| flags.0)
+            }
+        }
+
+        impl $crate::__private::core::convert::AsRef<$T> for $InternalBitFlags {
+            fn as_ref(&self) -> &$T {
+                &self.0
+            }
+        }
+
+        impl $crate::__private::core::convert::From<$T> for $InternalBitFlags {
+            fn from(bits: $T) -> Self {
+                Self::from_bits_retain(bits)
+            }
+        }
+
+        // The internal flags type offers a similar API to the public one
+
+        $crate::__impl_public_bitflags! {
+            $InternalBitFlags: $T, $PublicBitFlags {
+                $(
+                    $(#[$inner $($args)*])*
+                    const $Flag = $value;
+                )*
+            }
+        }
+
+        $crate::__impl_public_bitflags_ops! {
+            $InternalBitFlags
+        }
+
+        $crate::__impl_public_bitflags_iter! {
+            $InternalBitFlags: $T, $PublicBitFlags
+        }
+
+        impl $InternalBitFlags {
+            /// Returns a mutable reference to the raw value of the flags currently stored.
+            #[inline]
+            pub fn bits_mut(&mut self) -> &mut $T {
+                &mut self.0
+            }
+        }
+    };
+}