feat: Get and fill method to make a deep copy

Author: Vyacheslav

Src/StackMemoryCollections/GenerateHelpers.cs

@@ -213,15 +213,17 @@ in MemberInfo memberInfo
 ");
                 return;
             }
-
-            builder.Append($@"
+            else
+            {
+                builder.Append($@"
         public static {memberInfo.TypeName} Get{memberInfo.MemberName}Value(in void* ptr)
         {{
             {memberInfo.TypeName} result = new {memberInfo.TypeName}();
             {memberInfo.TypeName}Helper.CopyToValue((byte*)ptr + {memberInfo.Offset}, ref result);
             return result;
         }}
 ");
+            }
         }
 
         private void GenerateSetСompositeValueFrom(
@@ -292,22 +294,43 @@ private void GenerateCopyToValueOut(
             in INamedTypeSymbol currentType
             )
         {
-            builder.Append($@"
+            if (typeInfo.IsValueType)
+            {
+                builder.Append($@"
+        [SkipLocalsInit]
         public static void CopyToValueOut(in void* ptr, out {currentType.Name} value)
         {{
-            value = new {currentType.Name}();
+            Unsafe.SkipInit(out value);
 ");
-            foreach (var memberInfo in typeInfo.Members)
+                foreach (var memberInfo in typeInfo.Members)
+                {
+                    builder.Append($@"
+            value.{memberInfo.MemberName} = Get{memberInfo.MemberName}Value(in ptr);
+");
+                }
+
+                builder.Append($@"
+        }}
+");
+            }
+            else
             {
                 builder.Append($@"
+        public static void CopyToValueOut(in void* ptr, out {currentType.Name} value)
+        {{
+            value = new {currentType.Name}();
+");
+                foreach (var memberInfo in typeInfo.Members)
+                {
+                    builder.Append($@"
             value.{memberInfo.MemberName} = Get{memberInfo.MemberName}Value(in ptr);
 ");
-            }
+                }
 
-            builder.Append($@"
+                builder.Append($@"
         }}
-
 ");
+            }
         }
 
         private void GenerateCopy(

Src/StackMemoryCollections/GenerateWrappers.cs

@@ -2,6 +2,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 
 namespace StackMemoryCollections
@@ -67,6 +68,7 @@ in string wrapperNamespace
 
 using System;
 using {currentType.ContainingNamespace};
+using System.Runtime.CompilerServices;
 
 namespace {currentType.ContainingNamespace}.{wrapperNamespace}
 {{
@@ -253,6 +255,8 @@ in Dictionary<string, TypeInfo> typeInfos
         {
             WrapperPtr(in builder);
             PrimitiveWrapperChangePtr(in builder);
+            WrapperGetValue(in typeInfo, in builder);
+            WrapperFillValue(in typeInfo, in builder);
 
             for (int i = 0; i < typeInfo.Members.Count; i++)
             {
@@ -289,6 +293,53 @@ in StringBuilder builder
 ");
         }
 
+        private void WrapperGetValue(
+            in TypeInfo typeInfo,
+            in StringBuilder builder
+            )
+        {
+            if(typeInfo.IsValueType)
+            {
+                builder.Append($@"
+        [SkipLocalsInit]
+        public {typeInfo.TypeName} GetValue()
+        {{
+            {typeInfo.ContainingNamespace}.{typeInfo.TypeName} result;
+            Unsafe.SkipInit(out result);
+            {typeInfo.ContainingNamespace}.{typeInfo.TypeName}Helper.CopyToValue(in _start, ref result);
+
+            return result;
+        }}
+
+            ");
+            }
+            else
+            {
+                builder.Append($@"
+        public {typeInfo.TypeName} GetValue()
+        {{
+            {typeInfo.ContainingNamespace}.{typeInfo.TypeName} result = new {typeInfo.TypeName}();
+            {typeInfo.ContainingNamespace}.{typeInfo.TypeName}Helper.CopyToValue(in _start, ref result);
+            return result;
+        }}
+            ");
+            }
+        }
+
+        private void WrapperFillValue(
+            in TypeInfo typeInfo,
+            in StringBuilder builder
+            )
+        {
+            builder.Append($@"
+        public void Fill(in {typeInfo.TypeName} value)
+        {{
+            {typeInfo.TypeName}Helper.CopyToPtr(in value, in _start);
+        }}
+
+            ");
+        }
+
         private void WrapperPrimitiveGetSet(
             in StringBuilder builder,
             in MemberInfo memberInfo,