capacity

Cysharp · Aug 20, 2024 · d7fac36 · d7fac36
1 parent b0f2a50
commit d7fac36
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Showing 2 changed files with 37 additions and 6 deletions.
diff --git a/src/ObservableCollections/ObservableDictionary.cs b/src/ObservableCollections/ObservableDictionary.cs
@@ -3,6 +3,7 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
+using System.Linq;
 
 namespace ObservableCollections
 {
@@ -13,12 +14,27 @@ public sealed partial class ObservableDictionary<TKey, TValue> : IDictionary<TKe
         readonly Dictionary<TKey, TValue> dictionary;
         public object SyncRoot { get; } = new object();
 
-        public ObservableDictionary(IEqualityComparer<TKey>? comparer = null)
+        public ObservableDictionary()
+        {
+            this.dictionary = new Dictionary<TKey, TValue>();
+        }
+
+        public ObservableDictionary(IEqualityComparer<TKey>? comparer)
         {
             this.dictionary = new Dictionary<TKey, TValue>(comparer: comparer);
         }
 
-        public ObservableDictionary(IEnumerable<KeyValuePair<TKey, TValue>> collection, IEqualityComparer<TKey>? comparer = null)
+        public ObservableDictionary(int capacity, IEqualityComparer<TKey>? comparer)
+        {
+            this.dictionary = new Dictionary<TKey, TValue>(capacity, comparer: comparer);
+        }
+
+        public ObservableDictionary(IEnumerable<KeyValuePair<TKey, TValue>> collection)
+            : this(collection, null)
+        {
+        }
+
+        public ObservableDictionary(IEnumerable<KeyValuePair<TKey, TValue>> collection, IEqualityComparer<TKey>? comparer)
         {
 #if NETSTANDARD2_1_OR_GREATER || NET6_0_OR_GREATER
             this.dictionary = new Dictionary<TKey, TValue>(collection: collection, comparer: comparer);

diff --git a/src/ObservableCollections/ObservableHashSet.cs b/src/ObservableCollections/ObservableHashSet.cs
@@ -14,21 +14,36 @@ public sealed partial class ObservableHashSet<T> : IReadOnlySet<T>, IReadOnlyCol
         readonly HashSet<T> set;
         public object SyncRoot { get; } = new object();
 
-        public ObservableHashSet(IEqualityComparer<T>? comparer = null)
+        public ObservableHashSet()
+        {
+            this.set = new HashSet<T>();
+        }
+
+        public ObservableHashSet(IEqualityComparer<T>? comparer)
         {
             this.set = new HashSet<T>(comparer: comparer);
         }
 
 #if NETSTANDARD2_1_OR_GREATER || NET5_0_OR_GREATER
 
-        public ObservableHashSet(int capacity, IEqualityComparer<T>? comparer = null)
+        public ObservableHashSet(int capacity)
+        {
+            this.set = new HashSet<T>(capacity: capacity);
+        }
+
+        public ObservableHashSet(int capacity, IEqualityComparer<T>? comparer)
         {
             this.set = new HashSet<T>(capacity: capacity, comparer: comparer);
         }
 
 #endif
 
-        public ObservableHashSet(IEnumerable<T> collection, IEqualityComparer<T>? comparer = null)
+        public ObservableHashSet(IEnumerable<T> collection)
+        {
+            this.set = new HashSet<T>(collection: collection);
+        }
+
+        public ObservableHashSet(IEnumerable<T> collection, IEqualityComparer<T>? comparer)
         {
             this.set = new HashSet<T>(collection: collection, comparer: comparer);
         }
@@ -185,7 +200,7 @@ public void Clear()
 
         public bool TryGetValue(T equalValue, [MaybeNullWhen(false)] out T actualValue)
         {
-            lock(SyncRoot)
+            lock (SyncRoot)
             {
                 return set.TryGetValue(equalValue, out actualValue);
             }