Support more primitive type converters

src/libraries/System.ComponentModel.TypeConverter/ref/System.ComponentModel.TypeConverter.cs

@@ -351,6 +351,14 @@ public enum DataObjectMethodType
         Insert = 3,
         Delete = 4,
     }
+    public partial class DateOnlyConverter : System.ComponentModel.TypeConverter
+    {
+        public DateOnlyConverter() { }
+        public override bool CanConvertFrom(System.ComponentModel.ITypeDescriptorContext? context, System.Type sourceType) { throw null; }
+        public override bool CanConvertTo(System.ComponentModel.ITypeDescriptorContext? context, [System.Diagnostics.CodeAnalysis.NotNullWhen(true)] System.Type? destinationType) { throw null; }
+        public override object? ConvertFrom(System.ComponentModel.ITypeDescriptorContext? context, System.Globalization.CultureInfo? culture, object value) { throw null; }
+        public override object? ConvertTo(System.ComponentModel.ITypeDescriptorContext? context, System.Globalization.CultureInfo? culture, object? value, System.Type destinationType) { throw null; }
+    }
     public partial class DateTimeConverter : System.ComponentModel.TypeConverter
     {
         public DateTimeConverter() { }
@@ -510,6 +518,10 @@ public GuidConverter() { }
         public override object? ConvertFrom(System.ComponentModel.ITypeDescriptorContext? context, System.Globalization.CultureInfo? culture, object value) { throw null; }
         public override object? ConvertTo(System.ComponentModel.ITypeDescriptorContext? context, System.Globalization.CultureInfo? culture, object? value, System.Type destinationType) { throw null; }
     }
+    public partial class HalfConverter : System.ComponentModel.BaseNumberConverter
+    {
+        public HalfConverter() { }
+    }
     public partial class HandledEventArgs : System.EventArgs
     {
         public HandledEventArgs() { }
@@ -655,6 +667,10 @@ protected InstanceCreationEditor() { }
         public virtual string Text { get { throw null; } }
         public abstract object? CreateInstance(System.ComponentModel.ITypeDescriptorContext context, System.Type instanceType);
     }
+    public partial class Int128Converter : System.ComponentModel.BaseNumberConverter
+    {
+        public Int128Converter() { }
+    }
     public partial class Int16Converter : System.ComponentModel.BaseNumberConverter
     {
         public Int16Converter() { }
@@ -1244,6 +1260,14 @@ public static partial class SyntaxCheck
         public static bool CheckPath(string value) { throw null; }
         public static bool CheckRootedPath(string value) { throw null; }
     }
+    public partial class TimeOnlyConverter : System.ComponentModel.TypeConverter
+    {
+        public TimeOnlyConverter() { }
+        public override bool CanConvertFrom(System.ComponentModel.ITypeDescriptorContext? context, System.Type sourceType) { throw null; }
+        public override bool CanConvertTo(System.ComponentModel.ITypeDescriptorContext? context, [System.Diagnostics.CodeAnalysis.NotNullWhen(true)] System.Type? destinationType) { throw null; }
+        public override object? ConvertFrom(System.ComponentModel.ITypeDescriptorContext? context, System.Globalization.CultureInfo? culture, object value) { throw null; }
+        public override object? ConvertTo(System.ComponentModel.ITypeDescriptorContext? context, System.Globalization.CultureInfo? culture, object? value, System.Type destinationType) { throw null; }
+    }
     public partial class TimeSpanConverter : System.ComponentModel.TypeConverter
     {
         public TimeSpanConverter() { }
@@ -1541,6 +1565,10 @@ public partial class UInt64Converter : System.ComponentModel.BaseNumberConverter
     {
         public UInt64Converter() { }
     }
+    public partial class UInt128Converter : System.ComponentModel.BaseNumberConverter
+    {
+        public UInt128Converter() { }
+    }
     public partial class VersionConverter : System.ComponentModel.TypeConverter
     {
         public VersionConverter() { }

src/libraries/System.ComponentModel.TypeConverter/src/System.ComponentModel.TypeConverter.csproj

@@ -17,13 +17,16 @@
     <Compile Include="System\ComponentModel\ByteConverter.cs" />
     <Compile Include="System\ComponentModel\CharConverter.cs" />
     <Compile Include="System\ComponentModel\CollectionConverter.cs" />
+    <Compile Include="System\ComponentModel\DateOnlyConverter.cs" />
     <Compile Include="System\ComponentModel\DateTimeConverter.cs" />
     <Compile Include="System\ComponentModel\DateTimeOffsetConverter.cs" />
     <Compile Include="System\ComponentModel\DecimalConverter.cs" />
     <Compile Include="System\ComponentModel\DoubleConverter.cs" />
     <Compile Include="System\ComponentModel\EnumConverter.cs" />
     <Compile Include="System\ComponentModel\GuidConverter.cs" />
+    <Compile Include="System\ComponentModel\HalfConverter.cs" />
     <Compile Include="System\ComponentModel\Int16Converter.cs" />
+    <Compile Include="System\ComponentModel\Int128Converter.cs" />
     <Compile Include="System\ComponentModel\Int32Converter.cs" />
     <Compile Include="System\ComponentModel\Int64Converter.cs" />
     <Compile Include="System\ComponentModel\ITypeDescriptorContext.cs" />
@@ -33,9 +36,11 @@
     <Compile Include="System\ComponentModel\SByteConverter.cs" />
     <Compile Include="System\ComponentModel\SingleConverter.cs" />
     <Compile Include="System\ComponentModel\StringConverter.cs" />
+    <Compile Include="System\ComponentModel\TimeOnlyConverter.cs" />
     <Compile Include="System\ComponentModel\TimeSpanConverter.cs" />
     <Compile Include="System\ComponentModel\TypeConverter.cs" />
     <Compile Include="System\ComponentModel\TypeListConverter.cs" />
+    <Compile Include="System\ComponentModel\UInt128Converter.cs" />
     <Compile Include="System\ComponentModel\UInt16Converter.cs" />
     <Compile Include="System\ComponentModel\UInt32Converter.cs" />
     <Compile Include="System\ComponentModel\UInt64Converter.cs" />

src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/DateOnlyConverter.cs

@@ -0,0 +1,115 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.ComponentModel.Design.Serialization;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.Reflection;
+
+namespace System.ComponentModel
+{
+    /// <summary>
+    /// Provides a type converter to convert <see cref='System.DateOnly'/>
+    /// objects to and from various other representations.
+    /// </summary>
+    public class DateOnlyConverter : TypeConverter
+    {
+        /// <summary>
+        /// Gets a value indicating whether this converter can convert an
+        /// object in the given source type to a <see cref='System.DateOnly'/>
+        /// object using the specified context.
+        /// </summary>
+        public override bool CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)
+        {
+            return sourceType == typeof(string) || base.CanConvertFrom(context, sourceType);
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether this converter can convert an object
+        /// to the given destination type using the context.
+        /// </summary>
+        public override bool CanConvertTo(ITypeDescriptorContext? context, [NotNullWhen(true)] Type? destinationType)
+        {
+            return destinationType == typeof(InstanceDescriptor) || base.CanConvertTo(context, destinationType);
+        }
+
+        /// <summary>
+        /// Converts the given value object to a <see cref='System.DateOnly'/> object.
+        /// </summary>
+        public override object? ConvertFrom(ITypeDescriptorContext? context, CultureInfo? culture, object value)
+        {
+            if (value is string text)
+            {
+                text = text.Trim();
+                if (text.Length == 0)
+                {
+                    return DateOnly.MinValue;
+                }
+
+                try
+                {
+                    // See if we have a culture info to parse with. If so, then use it.
+                    DateTimeFormatInfo? formatInfo = null;
+
+                    if (culture != null)
+                    {
+                        formatInfo = (DateTimeFormatInfo?)culture.GetFormat(typeof(DateTimeFormatInfo));
+                    }
+
+                    if (formatInfo != null)
+                    {
+                        return DateOnly.Parse(text, formatInfo);
+                    }
+                    else
+                    {
+                        return DateOnly.Parse(text, culture);
+                    }
+                }
+                catch (FormatException e)
+                {
+                    throw new FormatException(SR.Format(SR.ConvertInvalidPrimitive, (string)value, nameof(DateOnly)), e);
+                }
+            }
+
+            return base.ConvertFrom(context, culture, value);
+        }
+
+        /// <summary>
+        /// Converts the given value object to a <see cref='System.DateOnly'/>
+        /// object using the arguments.
+        /// </summary>
+        public override object? ConvertTo(ITypeDescriptorContext? context, CultureInfo? culture, object? value, Type destinationType)
+        {
+            if (destinationType == typeof(string) && value is DateOnly dateOnly)
+            {
+                if (dateOnly == DateOnly.MinValue)
+                {
+                    return string.Empty;
+                }
+
+                if (culture == null)
+                {
+                    culture = CultureInfo.CurrentCulture;
+                }
+
+                DateTimeFormatInfo? formatInfo = (DateTimeFormatInfo?)culture.GetFormat(typeof(DateTimeFormatInfo));
+
+                if (culture == CultureInfo.InvariantCulture)
+                {
+                    return dateOnly.ToString("yyyy-MM-dd", culture);
+                }
+
+                string format = formatInfo!.ShortDatePattern;
+
+                return dateOnly.ToString(format, CultureInfo.CurrentCulture);
+            }
+
+            if (destinationType == typeof(InstanceDescriptor) && value is DateOnly date)
+            {
+                return new InstanceDescriptor(typeof(DateOnly).GetConstructor(new Type[] { typeof(int), typeof(int), typeof(int) }), new object[] { date.Year, date.Month, date.Day });
+            }
+
+            return base.ConvertTo(context, culture, value, destinationType);
+        }
+    }
+}

src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/HalfConverter.cs

@@ -0,0 +1,41 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics;
+using System.Globalization;
+
+namespace System.ComponentModel
+{
+    /// <summary>
+    /// Provides a type converter to convert half-precision, floating point number objects to and
+    /// from various other representations.
+    /// </summary>
+    public class HalfConverter : BaseNumberConverter
+    {
+        /// <summary>
+        /// Determines whether this editor will attempt to convert hex (0x or #) strings
+        /// </summary>
+        internal override bool AllowHex => false;
+
+        /// <summary>
+        /// The Type this converter is targeting (e.g. Int16, UInt32, etc.)
+        /// </summary>
+        internal override Type TargetType => typeof(Half);
+
+        /// <summary>
+        /// Convert the given value to a string using the given radix
+        /// </summary>
+        internal override object FromString(string value, int radix) => throw new NotImplementedException(); // This method shouldn't be called anyway for the Half type as it doesn't support hex formatting.
+
+        /// <summary>
+        /// Convert the given value to a string using the given formatInfo
+        /// </summary>
+        internal override object FromString(string value, NumberFormatInfo? formatInfo) => Half.Parse(value, formatInfo);
+
+        /// <summary>
+        /// Convert the given value from a string using the given formatInfo
+        /// </summary>
+        internal override string ToString(object value, NumberFormatInfo? formatInfo) =>
+            ((Half)value).ToString(formatInfo);
+    }
+}

src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/Int128Converter.cs

@@ -0,0 +1,43 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics;
+using System.Globalization;
+
+namespace System.ComponentModel
+{
+    /// <summary>
+    /// Provides a type converter to convert 128-bit signed integer objects to and
+    /// from various other representations.
+    /// </summary>
+    public class Int128Converter : BaseNumberConverter
+    {
+        /// <summary>
+        /// The Type this converter is targeting (e.g. Int16, UInt32, etc.)
+        /// </summary>
+        internal override Type TargetType => typeof(Int128);
+
+        /// <summary>
+        /// Convert the given value string to Int128 using the given radix
+        /// </summary>
+        internal override object FromString(string value, int radix)
+        {
+            Debug.Assert(radix == 16);
+            Debug.Assert(value is not null);
+
+            return Int128.Parse(value, NumberStyles.HexNumber);
+        }
+
+        /// <summary>
+        /// Convert the given value string to Int128 using given formatInfo
+        /// </summary>
+        internal override object FromString(string value, NumberFormatInfo? formatInfo) =>
+            Int128.Parse(value, formatInfo);
+
+        /// <summary>
+        /// Convert the given value from a string using the given formatInfo
+        /// </summary>
+        internal override string ToString(object value, NumberFormatInfo? formatInfo) =>
+            ((Int128)value).ToString(formatInfo);
+    }
+}

src/libraries/System.ComponentModel.TypeConverter/src/System/ComponentModel/ReflectTypeDescriptionProvider.cs

@@ -164,17 +164,22 @@ private static Dictionary<object, IntrinsicTypeConverterData> IntrinsicTypeConve
                     [typeof(double)] = new IntrinsicTypeConverterData((type) => new DoubleConverter()),
                     [typeof(string)] = new IntrinsicTypeConverterData((type) => new StringConverter()),
                     [typeof(int)] = new IntrinsicTypeConverterData((type) => new Int32Converter()),
+                    [typeof(Int128)] = new IntrinsicTypeConverterData((type) => new Int128Converter()),
                     [typeof(short)] = new IntrinsicTypeConverterData((type) => new Int16Converter()),
                     [typeof(long)] = new IntrinsicTypeConverterData((type) => new Int64Converter()),
                     [typeof(float)] = new IntrinsicTypeConverterData((type) => new SingleConverter()),
+                    [typeof(Half)] = new IntrinsicTypeConverterData((type) => new HalfConverter()),
+                    [typeof(UInt128)] = new IntrinsicTypeConverterData((type) => new UInt128Converter()),
                     [typeof(ushort)] = new IntrinsicTypeConverterData((type) => new UInt16Converter()),
                     [typeof(uint)] = new IntrinsicTypeConverterData((type) => new UInt32Converter()),
                     [typeof(ulong)] = new IntrinsicTypeConverterData((type) => new UInt64Converter()),
                     [typeof(object)] = new IntrinsicTypeConverterData((type) => new TypeConverter()),
                     [typeof(CultureInfo)] = new IntrinsicTypeConverterData((type) => new CultureInfoConverter()),
+                    [typeof(DateOnly)] = new IntrinsicTypeConverterData((type) => new DateOnlyConverter()),
                     [typeof(DateTime)] = new IntrinsicTypeConverterData((type) => new DateTimeConverter()),
                     [typeof(DateTimeOffset)] = new IntrinsicTypeConverterData((type) => new DateTimeOffsetConverter()),
                     [typeof(decimal)] = new IntrinsicTypeConverterData((type) => new DecimalConverter()),
+                    [typeof(TimeOnly)] = new IntrinsicTypeConverterData((type) => new TimeOnlyConverter()),
                     [typeof(TimeSpan)] = new IntrinsicTypeConverterData((type) => new TimeSpanConverter()),
                     [typeof(Guid)] = new IntrinsicTypeConverterData((type) => new GuidConverter()),
                     [typeof(Uri)] = new IntrinsicTypeConverterData((type) => new UriTypeConverter()),