1 files changed, 106 insertions, 0 deletions
diff --git a/vendor/time/src/format_description/borrowed_format_item.rs b/vendor/time/src/format_description/borrowed_format_item.rs
new file mode 100644
index 000000000..425b90287
--- /dev/null
+++ b/vendor/time/src/format_description/borrowed_format_item.rs
@@ -0,0 +1,106 @@
+//! A format item with borrowed data.
+
+#[cfg(feature = "alloc")]
+use alloc::string::String;
+#[cfg(feature = "alloc")]
+use core::fmt;
+
+use crate::error;
+use crate::format_description::Component;
+
+/// A complete description of how to format and parse a type.
+#[non_exhaustive]
+#[cfg_attr(not(feature = "alloc"), derive(Debug))]
+#[derive(Clone, PartialEq, Eq)]
+pub enum BorrowedFormatItem<'a> {
+    /// Bytes that are formatted as-is.
+    ///
+    /// **Note**: If you call the `format` method that returns a `String`, these bytes will be
+    /// passed through `String::from_utf8_lossy`.
+    Literal(&'a [u8]),
+    /// A minimal representation of a single non-literal item.
+    Component(Component),
+    /// A series of literals or components that collectively form a partial or complete
+    /// description.
+    Compound(&'a [Self]),
+    /// A `FormatItem` that may or may not be present when parsing. If parsing fails, there
+    /// will be no effect on the resulting `struct`.
+    ///
+    /// This variant has no effect on formatting, as the value is guaranteed to be present.
+    Optional(&'a Self),
+    /// A series of `FormatItem`s where, when parsing, the first successful parse is used. When
+    /// formatting, the first element of the slice is used.  An empty slice is a no-op when
+    /// formatting or parsing.
+    First(&'a [Self]),
+}
+
+#[cfg(feature = "alloc")]
+impl fmt::Debug for BorrowedFormatItem<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Literal(literal) => f.write_str(&String::from_utf8_lossy(literal)),
+            Self::Component(component) => component.fmt(f),
+            Self::Compound(compound) => compound.fmt(f),
+            Self::Optional(item) => f.debug_tuple("Optional").field(item).finish(),
+            Self::First(items) => f.debug_tuple("First").field(items).finish(),
+        }
+    }
+}
+
+impl From<Component> for BorrowedFormatItem<'_> {
+    fn from(component: Component) -> Self {
+        Self::Component(component)
+    }
+}
+
+impl TryFrom<BorrowedFormatItem<'_>> for Component {
+    type Error = error::DifferentVariant;
+
+    fn try_from(value: BorrowedFormatItem<'_>) -> Result<Self, Self::Error> {
+        match value {
+            BorrowedFormatItem::Component(component) => Ok(component),
+            _ => Err(error::DifferentVariant),
+        }
+    }
+}
+
+impl<'a> From<&'a [BorrowedFormatItem<'_>]> for BorrowedFormatItem<'a> {
+    fn from(items: &'a [BorrowedFormatItem<'_>]) -> Self {
+        Self::Compound(items)
+    }
+}
+
+impl<'a> TryFrom<BorrowedFormatItem<'a>> for &[BorrowedFormatItem<'a>] {
+    type Error = error::DifferentVariant;
+
+    fn try_from(value: BorrowedFormatItem<'a>) -> Result<Self, Self::Error> {
+        match value {
+            BorrowedFormatItem::Compound(items) => Ok(items),
+            _ => Err(error::DifferentVariant),
+        }
+    }
+}
+
+impl PartialEq<Component> for BorrowedFormatItem<'_> {
+    fn eq(&self, rhs: &Component) -> bool {
+        matches!(self, Self::Component(component) if component == rhs)
+    }
+}
+
+impl PartialEq<BorrowedFormatItem<'_>> for Component {
+    fn eq(&self, rhs: &BorrowedFormatItem<'_>) -> bool {
+        rhs == self
+    }
+}
+
+impl PartialEq<&[Self]> for BorrowedFormatItem<'_> {
+    fn eq(&self, rhs: &&[Self]) -> bool {
+        matches!(self, Self::Compound(compound) if compound == rhs)
+    }
+}
+
+impl PartialEq<BorrowedFormatItem<'_>> for &[BorrowedFormatItem<'_>] {
+    fn eq(&self, rhs: &BorrowedFormatItem<'_>) -> bool {
+        rhs == self
+    }
+}