jiripolasek · December 9, 2024 00:07 · Dec 9, 2024 · Dec 8, 2024
diff --git a/Freezer.cs b/Freezer.cs
@@ -1,3 +1,17 @@
+// HashSet supports collection initializer syntax
+private static readonly HashSet<string> abcCollection1 = ["a", "b", "c"];
+private static readonly FrozenSet<string> abcCollection2 = ["a", "b", "c"]; // doesn't work, yet...
+
+// example with freezer:
+private static readonly FrozenSet<FileAttributes> allowedAttributes = Freeze(FileAttributes.Archive, FileAttributes.Device, FileAttributes.Hidden);
+private static readonly FrozenSet<string> allowedKeywords = Freeze(StringComparer.OrdinalIgnoreCase, "squirrel", "cat", "dog");
+
+// example without:
+private static readonly FrozenSet<FileAttributes> allowedAttributesUgly = new HashSet<FileAttributes>([FileAttributes.Archive, FileAttributes.Device, FileAttributes.Hidden]).ToFrozenSet();
+private static readonly FrozenSet<string> allowedKeywordsUgly = new HashSet<string>(["squirrel", "cat", "dog"]).ToFrozenSet(StringComparer.OrdinalIgnoreCase);
+
+
+
 #if NET8_0_OR_GREATER
 /// <summary>
 /// Provides a set of static methods for creating frozen sets with a readable syntax in field / property initialization.

diff --git a/Freezer.cs b/Freezer.cs
@@ -0,0 +1,26 @@
+#if NET8_0_OR_GREATER
+/// <summary>
+/// Provides a set of static methods for creating frozen sets with a readable syntax in field / property initialization.
+/// </summary>
+internal static class Freezer
+{
+    /// <summary>
+    /// Creates a new <see cref="FrozenSet{T}"/> from the specified elements.
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    /// <param name="enumerable"></param>
+    /// <returns></returns>
+    public static FrozenSet<T> From<T>(params IEnumerable<T> enumerable)
+    {
+        return enumerable.ToFrozenSet();
+    }
+
+    /// <summary>
+    /// Creates a new <see cref="FrozenSet{T}"/> from the specified elements.
+    /// </summary> 
+    public static FrozenSet<T> From<T>(IEqualityComparer<T> comparer, params IEnumerable<T> enumerable)
+    {
+        return enumerable.ToFrozenSet(comparer);
+    }
+}
+#endif