1 files changed, 45 insertions, 0 deletions
diff --git a/servo/components/style/values/generics/column.rs b/servo/components/style/values/generics/column.rs
new file mode 100644
index 0000000000..4b5f0e0399
--- /dev/null
+++ b/servo/components/style/values/generics/column.rs
@@ -0,0 +1,45 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+//! Generic types for the column properties.
+
+/// A generic type for `column-count` values.
+#[derive(
+    Animate,
+    Clone,
+    ComputeSquaredDistance,
+    Copy,
+    Debug,
+    MallocSizeOf,
+    Parse,
+    PartialEq,
+    SpecifiedValueInfo,
+    ToAnimatedValue,
+    ToAnimatedZero,
+    ToComputedValue,
+    ToCss,
+    ToResolvedValue,
+    ToShmem,
+)]
+pub enum ColumnCount<PositiveInteger> {
+    /// A positive integer.
+    Integer(PositiveInteger),
+    /// The keyword `auto`.
+    #[animation(error)]
+    Auto,
+}
+
+impl<I> ColumnCount<I> {
+    /// Returns `auto`.
+    #[inline]
+    pub fn auto() -> Self {
+        ColumnCount::Auto
+    }
+
+    /// Returns whether this value is `auto`.
+    #[inline]
+    pub fn is_auto(self) -> bool {
+        matches!(self, ColumnCount::Auto)
+    }
+}