126 lines
4.1 KiB
C#
126 lines
4.1 KiB
C#
// ==++==
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ==--==
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namespace System {
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using System.Diagnostics;
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using System.Reflection;
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using System.Runtime.CompilerServices;
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using Microsoft.Bartok.Runtime;
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//| <include path='docs/doc[@for="Enum"]/*' />
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public abstract class Enum : ValueType, IComparable, IFormattable
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{
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//| <include path='docs/doc[@for="Enum.Equals"]/*' />
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public override bool Equals(Object obj)
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{
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Enum that = obj as Enum;
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if (that == null || this.GetType() != obj.GetType())
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return false;
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return this.GetValue().Equals(that.GetValue());
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}
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//| <include path='docs/doc[@for="Enum.GetHashCode"]/*' />
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public override int GetHashCode()
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{
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return GetValue().GetHashCode();
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}
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// Compares this enum and the object.
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// They have to be of the same type or a ArgumentException is thrown
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// Returns 0 if equal, -1 if less than, or 1 greater then the target
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//| <include path='docs/doc[@for="Enum.CompareTo"]/*' />
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public int CompareTo(Object target)
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{
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return ((IComparable)GetValue()).CompareTo(target);
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}
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//| <include path='docs/doc[@for="Enum.ToString"]/*' />
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public String ToString(String format)
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{
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return ((IFormattable)GetValue()).ToString(format);
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}
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public override String ToString()
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{
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return GetValue().ToString();
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}
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//
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// IValue implementation
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//
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//| <include path='docs/doc[@for="Enum.GetTypeCode"]/*' />
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[NoHeapAllocation]
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public override TypeCode GetTypeCode()
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{
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StructuralType type = this.vtable.structuralView;
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switch (type) {
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case StructuralType.Int8:
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return TypeCode.SByte;
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case StructuralType.Int16:
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return TypeCode.Int16;
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case StructuralType.Int32:
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return TypeCode.Int32;
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case StructuralType.Int64:
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return TypeCode.Int64;
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case StructuralType.UInt8:
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return TypeCode.Byte;
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case StructuralType.UInt16:
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return TypeCode.UInt16;
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case StructuralType.UInt32:
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return TypeCode.UInt32;
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case StructuralType.UInt64:
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return TypeCode.UInt64;
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default:
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VTable.NotReached("bad enum in InternalGetValue");
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return TypeCode.Object;
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}
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}
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private Object GetValue()
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{
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StructuralType type = this.vtable.structuralView;
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Object result;
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switch (type) {
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case StructuralType.Int8:
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result = (sbyte) (Object) this;
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break;
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case StructuralType.Int16:
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result = (short) (Object) this;
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break;
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case StructuralType.Int32:
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result = (int) (Object) this;
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break;
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case StructuralType.Int64:
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result = (long) (Object) this;
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break;
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case StructuralType.UInt8:
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result = (byte) (Object) this;
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break;
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case StructuralType.UInt16:
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result = (ushort) (Object) this;
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break;
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case StructuralType.UInt32:
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result = (uint) (Object) this;
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break;
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case StructuralType.UInt64:
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result = (ulong) (Object) this;
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break;
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default:
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VTable.NotReached("bad enum in InternalGetValue");
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result = null;
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break;
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}
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return result;
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}
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}
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}
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