chore: import upstream snapshot with attribution

2026-07-13 13:02:50 +08:00
commit 0fc60fdcb1
5008 changed files with 910633 additions and 0 deletions
@@ -0,0 +1,66 @@
+/*
+ * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
+ * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+*/
+
+using System;
+
+namespace QuantConnect.Optimizer.Parameters
+{
+    /// <summary>
+    /// Enumerates all possible values for specific optimization parameter
+    /// </summary>
+    public class OptimizationStepParameterEnumerator : OptimizationParameterEnumerator<OptimizationStepParameter>
+    {
+        /// <summary>
+        /// Creates an instance of <see cref="OptimizationStepParameterEnumerator"/>
+        /// </summary>
+        /// <param name="optimizationParameter">Step-based optimization parameter</param>
+        public OptimizationStepParameterEnumerator(OptimizationStepParameter optimizationParameter) : base(optimizationParameter)
+        {
+        }
+
+        /// <summary>
+        /// Gets the element in the collection at the current position of the enumerator.
+        /// </summary>
+        /// <returns>The element in the collection at the current position of the enumerator.</returns>
+        public override string Current
+        {
+            get
+            {
+                var value = OptimizationParameter.MinValue + Index * OptimizationParameter.Step;
+                if (Index == -1 || value > OptimizationParameter.MaxValue)
+                    throw new InvalidOperationException();
+
+                return value.ToStringInvariant();
+            }
+        }
+
+        /// <summary>
+        /// Advances the enumerator to the next element of the collection.
+        /// </summary>
+        /// <returns> true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.</returns>
+        /// <exception cref="T:System.InvalidOperationException">The collection was modified after the enumerator was created.</exception>
+        public override bool MoveNext()
+        {
+            var value = OptimizationParameter.MinValue + (Index + 1) * OptimizationParameter.Step;
+            if (value <= OptimizationParameter.MaxValue)
+            {
+                Index++;
+                return true;
+            }
+
+            return false;
+        }
+    }
+}