niko
158 lines
7.9 KiB
C#
158 lines
7.9 KiB
C#
using System;
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namespace System
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{
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/// <summary>Represents an object whose underlying type is a value type that can also be assigned null like a reference type.</summary>
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/// <typeparam name="T">The underlying value type of the <see cref="T:System.Nullable`1" /> generic type.</typeparam>
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/// <filterpriority>1</filterpriority>
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// Token: 0x02000060 RID: 96
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[Serializable]
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public struct Nullable<T> where T : struct
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{
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/// <summary>Initializes a new instance of the <see cref="T:System.Nullable`1" /> structure to the specified value. </summary>
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/// <param name="value">A value type.</param>
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// Token: 0x060006B3 RID: 1715 RVA: 0x000150F4 File Offset: 0x000132F4
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public Nullable(T value)
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{
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this.has_value = true;
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this.value = value;
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}
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/// <summary>Gets a value indicating whether the current <see cref="T:System.Nullable`1" /> object has a value.</summary>
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/// <returns>true if the current <see cref="T:System.Nullable`1" /> object has a value; false if the current <see cref="T:System.Nullable`1" /> object has no value.</returns>
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// Token: 0x170000C9 RID: 201
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// (get) Token: 0x060006B4 RID: 1716 RVA: 0x00015104 File Offset: 0x00013304
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public bool HasValue
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{
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get
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{
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return this.has_value;
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}
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}
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/// <summary>Gets the value of the current <see cref="T:System.Nullable`1" /> value.</summary>
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/// <returns>The value of the current <see cref="T:System.Nullable`1" /> object if the <see cref="P:System.Nullable`1.HasValue" /> property is true. An exception is thrown if the <see cref="P:System.Nullable`1.HasValue" /> property is false.</returns>
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/// <exception cref="T:System.InvalidOperationException">The <see cref="P:System.Nullable`1.HasValue" /> property is false.</exception>
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// Token: 0x170000CA RID: 202
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// (get) Token: 0x060006B5 RID: 1717 RVA: 0x0001510C File Offset: 0x0001330C
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public T Value
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{
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get
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{
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if (!this.has_value)
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{
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throw new InvalidOperationException("Nullable object must have a value.");
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}
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return this.value;
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}
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}
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/// <summary>Indicates whether the current <see cref="T:System.Nullable`1" /> object is equal to a specified object.</summary>
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/// <returns>true if the <paramref name="other" /> parameter is equal to the current <see cref="T:System.Nullable`1" /> object; otherwise, false. This table describes how equality is defined for the compared values: Return ValueDescriptiontrueThe <see cref="P:System.Nullable`1.HasValue" /> property is false, and the <paramref name="other" /> parameter is null. That is, two null values are equal by definition.-or-The <see cref="P:System.Nullable`1.HasValue" /> property is true, and the value returned by the <see cref="P:System.Nullable`1.Value" /> property is equal to the <paramref name="other" /> parameter.falseThe <see cref="P:System.Nullable`1.HasValue" /> property for the current <see cref="T:System.Nullable`1" /> structure is true, and the <paramref name="other" /> parameter is null.-or-The <see cref="P:System.Nullable`1.HasValue" /> property for the current <see cref="T:System.Nullable`1" /> structure is false, and the <paramref name="other" /> parameter is not null.-or-The <see cref="P:System.Nullable`1.HasValue" /> property for the current <see cref="T:System.Nullable`1" /> structure is true, and the value returned by the <see cref="P:System.Nullable`1.Value" /> property is not equal to the <paramref name="other" /> parameter.</returns>
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/// <param name="other">An object.</param>
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/// <filterpriority>1</filterpriority>
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// Token: 0x060006B6 RID: 1718 RVA: 0x0001512C File Offset: 0x0001332C
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public override bool Equals(object other)
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{
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if (other == null)
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{
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return !this.has_value;
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}
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return other is T? && this.Equals((T?)other);
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}
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// Token: 0x060006B7 RID: 1719 RVA: 0x00015158 File Offset: 0x00013358
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private bool Equals(T? other)
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{
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return other.has_value == this.has_value && (!this.has_value || other.value.Equals(this.value));
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}
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/// <summary>Retrieves the hash code of the object returned by the <see cref="P:System.Nullable`1.Value" /> property.</summary>
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/// <returns>The hash code of the object returned by the <see cref="P:System.Nullable`1.Value" /> property if the <see cref="P:System.Nullable`1.HasValue" /> property is true, or zero if the <see cref="P:System.Nullable`1.HasValue" /> property is false. </returns>
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/// <filterpriority>1</filterpriority>
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// Token: 0x060006B8 RID: 1720 RVA: 0x000151A4 File Offset: 0x000133A4
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public override int GetHashCode()
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{
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if (!this.has_value)
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{
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return 0;
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}
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return this.value.GetHashCode();
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}
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/// <summary>Retrieves the value of the current <see cref="T:System.Nullable`1" /> object, or the object's default value.</summary>
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/// <returns>The value of the <see cref="P:System.Nullable`1.Value" /> property if the <see cref="P:System.Nullable`1.HasValue" /> property is true; otherwise, the default value of the current <see cref="T:System.Nullable`1" /> object. The type of the default value is the type argument of the current <see cref="T:System.Nullable`1" /> object, and the value of the default value consists solely of binary zeroes.</returns>
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// Token: 0x060006B9 RID: 1721 RVA: 0x000151C4 File Offset: 0x000133C4
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public T GetValueOrDefault()
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{
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return (!this.has_value) ? default(T) : this.value;
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}
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/// <summary>Retrieves the value of the current <see cref="T:System.Nullable`1" /> object, or the specified default value.</summary>
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/// <returns>The value of the <see cref="P:System.Nullable`1.Value" /> property if the <see cref="P:System.Nullable`1.HasValue" /> property is true; otherwise, the <paramref name="defaultValue" /> parameter.</returns>
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/// <param name="defaultValue">A value to return if the <see cref="P:System.Nullable`1.HasValue" /> property is false.</param>
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// Token: 0x060006BA RID: 1722 RVA: 0x000151F0 File Offset: 0x000133F0
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public T GetValueOrDefault(T defaultValue)
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{
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return (!this.has_value) ? defaultValue : this.value;
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}
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/// <summary>Returns the text representation of the value of the current <see cref="T:System.Nullable`1" /> object.</summary>
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/// <returns>The text representation of the value of the current <see cref="T:System.Nullable`1" /> object if the <see cref="P:System.Nullable`1.HasValue" /> property is true, or an empty string ("") if the <see cref="P:System.Nullable`1.HasValue" /> property is false.</returns>
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/// <filterpriority>1</filterpriority>
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// Token: 0x060006BB RID: 1723 RVA: 0x0001520C File Offset: 0x0001340C
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public override string ToString()
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{
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if (this.has_value)
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{
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return this.value.ToString();
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}
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return string.Empty;
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}
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// Token: 0x060006BC RID: 1724 RVA: 0x0001523C File Offset: 0x0001343C
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private static object Box(T? o)
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{
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if (!o.has_value)
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{
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return null;
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}
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return o.value;
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}
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// Token: 0x060006BD RID: 1725 RVA: 0x00015258 File Offset: 0x00013458
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private static T? Unbox(object o)
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{
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if (o == null)
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{
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return null;
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}
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return new T?((T)((object)o));
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}
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/// <summary>Creates a new <see cref="T:System.Nullable`1" /> object initialized to a specified value. </summary>
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/// <returns>A <see cref="T:System.Nullable`1" /> object whose <see cref="P:System.Nullable`1.Value" /> property is initialized with the <paramref name="value" /> parameter.</returns>
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/// <param name="value">A value type.</param>
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// Token: 0x060006BE RID: 1726 RVA: 0x00015280 File Offset: 0x00013480
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public static implicit operator T?(T value)
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{
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return new T?(value);
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}
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/// <summary>Returns the value of a specified <see cref="T:System.Nullable`1" /> value.</summary>
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/// <returns>The value of the <see cref="P:System.Nullable`1.Value" /> property for the <paramref name="value" /> parameter.</returns>
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/// <param name="value">A <see cref="T:System.Nullable`1" /> value.</param>
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// Token: 0x060006BF RID: 1727 RVA: 0x00015288 File Offset: 0x00013488
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public static explicit operator T(T? value)
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{
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return value.Value;
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}
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// Token: 0x040000BC RID: 188
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internal T value;
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// Token: 0x040000BD RID: 189
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internal bool has_value;
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}
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}
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