Nullable changes for boolean type (#23451)

* Nullable changes for boolean type

diff --git a/src/System.Private.CoreLib/shared/System/Boolean.cs b/src/System.Private.CoreLib/shared/System/Boolean.cs
index 4daf6f3..33e11be 100644 (file)
--- a/src/System.Private.CoreLib/shared/System/Boolean.cs
+++ b/src/System.Private.CoreLib/shared/System/Boolean.cs
@@ -12,6 +12,7 @@
 ** 
 ===========================================================*/
 
+#nullable enable
 using System.Runtime.CompilerServices;
 using System.Runtime.Versioning;
 
@@ -90,7 +91,7 @@ namespace System
             return TrueLiteral;
         }
 
-        public string ToString(IFormatProvider provider)
+        public string ToString(IFormatProvider? provider)
         {
             return ToString();
         }
@@ -128,7 +129,7 @@ namespace System
         }
 
         // Determines whether two Boolean objects are equal.
-        public override bool Equals(object obj)
+        public override bool Equals(object? obj)
         {
             //If it's not a boolean, we're definitely not equal
             if (!(obj is bool))
@@ -152,7 +153,7 @@ namespace System
         // 
         // Returns a value less than zero if this  object
         // 
-        public int CompareTo(object obj)
+        public int CompareTo(object? obj)
         {
             if (obj == null)
             {
@@ -225,7 +226,7 @@ namespace System
 
         // Determines whether a String represents true or false.
         // 
-        public static bool TryParse(string value, out bool result)
+        public static bool TryParse(string? value, out bool result)
         {
             if (value == null)
             {
@@ -306,77 +307,77 @@ namespace System
         }
 
 
-        bool IConvertible.ToBoolean(IFormatProvider provider)
+        bool IConvertible.ToBoolean(IFormatProvider? provider)
         {
             return m_value;
         }
 
-        char IConvertible.ToChar(IFormatProvider provider)
+        char IConvertible.ToChar(IFormatProvider? provider)
         {
             throw new InvalidCastException(SR.Format(SR.InvalidCast_FromTo, "Boolean", "Char"));
         }
 
-        sbyte IConvertible.ToSByte(IFormatProvider provider)
+        sbyte IConvertible.ToSByte(IFormatProvider? provider)
         {
             return Convert.ToSByte(m_value);
         }
 
-        byte IConvertible.ToByte(IFormatProvider provider)
+        byte IConvertible.ToByte(IFormatProvider? provider)
         {
             return Convert.ToByte(m_value);
         }
 
-        short IConvertible.ToInt16(IFormatProvider provider)
+        short IConvertible.ToInt16(IFormatProvider? provider)
         {
             return Convert.ToInt16(m_value);
         }
 
-        ushort IConvertible.ToUInt16(IFormatProvider provider)
+        ushort IConvertible.ToUInt16(IFormatProvider? provider)
         {
             return Convert.ToUInt16(m_value);
         }
 
-        int IConvertible.ToInt32(IFormatProvider provider)
+        int IConvertible.ToInt32(IFormatProvider? provider)
         {
             return Convert.ToInt32(m_value);
         }
 
-        uint IConvertible.ToUInt32(IFormatProvider provider)
+        uint IConvertible.ToUInt32(IFormatProvider? provider)
         {
             return Convert.ToUInt32(m_value);
         }
 
-        long IConvertible.ToInt64(IFormatProvider provider)
+        long IConvertible.ToInt64(IFormatProvider? provider)
         {
             return Convert.ToInt64(m_value);
         }
 
-        ulong IConvertible.ToUInt64(IFormatProvider provider)
+        ulong IConvertible.ToUInt64(IFormatProvider? provider)
         {
             return Convert.ToUInt64(m_value);
         }
 
-        float IConvertible.ToSingle(IFormatProvider provider)
+        float IConvertible.ToSingle(IFormatProvider? provider)
         {
             return Convert.ToSingle(m_value);
         }
 
-        double IConvertible.ToDouble(IFormatProvider provider)
+        double IConvertible.ToDouble(IFormatProvider? provider)
         {
             return Convert.ToDouble(m_value);
         }
 
-        decimal IConvertible.ToDecimal(IFormatProvider provider)
+        decimal IConvertible.ToDecimal(IFormatProvider? provider)
         {
             return Convert.ToDecimal(m_value);
         }
 
-        DateTime IConvertible.ToDateTime(IFormatProvider provider)
+        DateTime IConvertible.ToDateTime(IFormatProvider? provider)
         {
             throw new InvalidCastException(SR.Format(SR.InvalidCast_FromTo, "Boolean", "DateTime"));
         }
 
-        object IConvertible.ToType(Type type, IFormatProvider provider)
+        object IConvertible.ToType(Type type, IFormatProvider? provider)
         {
             return Convert.DefaultToType((IConvertible)this, type, provider);
         }