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Fix NullReferenceException in span AnyExcept polyfills with null elements #625

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Merged
SimonCropp merged 2 commits into from
Oct 11, 2026
Merged

Fix NullReferenceException in span AnyExcept polyfills with null elements #625

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8da1887
Fix NullReferenceException in span *AnyExcept with null elements
SimonCropp Oct 11, 2026
6da5513
Docs changes
actions-user Oct 11, 2026
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48 changes: 24 additions & 24 deletions api_list.include.md
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48 changes: 24 additions & 24 deletions readme.md
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42 changes: 30 additions & 12 deletions src/Polyfill/Polyfill_Memory_ContainsAnyExcept.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,17 +3,19 @@
namespace Polyfills;

using System;
using System.Collections.Generic;

static partial class Polyfill
{
/// <summary>Searches for any value other than the specified <paramref name="value"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-readonlyspan((-0))-0)
public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, T value)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
if (!span[i].Equals(value))
if (!comparer.Equals(span[i], value))
{
return true;
}
Expand All @@ -25,12 +27,13 @@ public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, T value)
/// <summary>Searches for any value other than <paramref name="value0"/> or <paramref name="value1"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-readonlyspan((-0))-0-0)
public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T value1)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
var item = span[i];
if (!item.Equals(value0) && !item.Equals(value1))
if (!comparer.Equals(item, value0) && !comparer.Equals(item, value1))
{
return true;
}
Expand All @@ -42,12 +45,13 @@ public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T v
/// <summary>Searches for any value other than <paramref name="value0"/>, <paramref name="value1"/>, or <paramref name="value2"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-readonlyspan((-0))-0-0-0)
public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T value1, T value2)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
var item = span[i];
if (!item.Equals(value0) && !item.Equals(value1) && !item.Equals(value2))
if (!comparer.Equals(item, value0) && !comparer.Equals(item, value1) && !comparer.Equals(item, value2))
{
return true;
}
Expand All @@ -59,11 +63,12 @@ public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T v
/// <summary>Searches for any value other than the specified <paramref name="values"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-readonlyspan((-0))-system-readonlyspan((-0)))
public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, ReadOnlySpan<T> values)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
if (!values.Contains(span[i]))
if (!ContainsValue(values, span[i], comparer))
{
return true;
}
Expand All @@ -75,26 +80,39 @@ public static bool ContainsAnyExcept<T>(this ReadOnlySpan<T> span, ReadOnlySpan<
/// <summary>Searches for any value other than the specified <paramref name="value"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-span((-0))-0)
public static bool ContainsAnyExcept<T>(this Span<T> span, T value)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
ContainsAnyExcept((ReadOnlySpan<T>)span, value);

/// <summary>Searches for any value other than <paramref name="value0"/> or <paramref name="value1"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-span((-0))-0-0)
public static bool ContainsAnyExcept<T>(this Span<T> span, T value0, T value1)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
ContainsAnyExcept((ReadOnlySpan<T>)span, value0, value1);

/// <summary>Searches for any value other than <paramref name="value0"/>, <paramref name="value1"/>, or <paramref name="value2"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-span((-0))-0-0-0)
public static bool ContainsAnyExcept<T>(this Span<T> span, T value0, T value1, T value2)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
ContainsAnyExcept((ReadOnlySpan<T>)span, value0, value1, value2);

/// <summary>Searches for any value other than the specified <paramref name="values"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.containsanyexcept?view=net-11.0#system-memoryextensions-containsanyexcept-1(system-span((-0))-system-readonlyspan((-0)))
public static bool ContainsAnyExcept<T>(this Span<T> span, ReadOnlySpan<T> values)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
ContainsAnyExcept((ReadOnlySpan<T>)span, values);

static bool ContainsValue<T>(ReadOnlySpan<T> values, T value, EqualityComparer<T> comparer)
{
for (var i = 0; i < values.Length; i++)
{
if (comparer.Equals(values[i], value))
{
return true;
}
}

return false;
}
}

#endif
29 changes: 17 additions & 12 deletions src/Polyfill/Polyfill_Memory_IndexOfAnyExcept.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,17 +3,19 @@
namespace Polyfills;

using System;
using System.Collections.Generic;

static partial class Polyfill
{
/// <summary>Searches for the first index of any value other than the specified <paramref name="value"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-readonlyspan((-0))-0)
public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
if (!span[i].Equals(value))
if (!comparer.Equals(span[i], value))
{
return i;
}
Expand All @@ -25,12 +27,13 @@ public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value)
/// <summary>Searches for the first index of any value other than <paramref name="value0"/> or <paramref name="value1"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-readonlyspan((-0))-0-0)
public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T value1)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
var item = span[i];
if (!item.Equals(value0) && !item.Equals(value1))
if (!comparer.Equals(item, value0) && !comparer.Equals(item, value1))
{
return i;
}
Expand All @@ -42,12 +45,13 @@ public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T val
/// <summary>Searches for the first index of any value other than <paramref name="value0"/>, <paramref name="value1"/>, or <paramref name="value2"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-readonlyspan((-0))-0-0-0)
public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T value1, T value2)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
var item = span[i];
if (!item.Equals(value0) && !item.Equals(value1) && !item.Equals(value2))
if (!comparer.Equals(item, value0) && !comparer.Equals(item, value1) && !comparer.Equals(item, value2))
{
return i;
}
Expand All @@ -59,11 +63,12 @@ public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T val
/// <summary>Searches for the first index of any value other than the specified <paramref name="values"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-readonlyspan((-0))-system-readonlyspan((-0)))
public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, ReadOnlySpan<T> values)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = 0; i < span.Length; i++)
{
if (!values.Contains(span[i]))
if (!ContainsValue(values, span[i], comparer))
{
return i;
}
Expand All @@ -75,25 +80,25 @@ public static int IndexOfAnyExcept<T>(this ReadOnlySpan<T> span, ReadOnlySpan<T>
/// <summary>Searches for the first index of any value other than the specified <paramref name="value"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-span((-0))-0)
public static int IndexOfAnyExcept<T>(this Span<T> span, T value)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
IndexOfAnyExcept((ReadOnlySpan<T>)span, value);

/// <summary>Searches for the first index of any value other than <paramref name="value0"/> or <paramref name="value1"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-span((-0))-0-0)
public static int IndexOfAnyExcept<T>(this Span<T> span, T value0, T value1)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
IndexOfAnyExcept((ReadOnlySpan<T>)span, value0, value1);

/// <summary>Searches for the first index of any value other than <paramref name="value0"/>, <paramref name="value1"/>, or <paramref name="value2"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-span((-0))-0-0-0)
public static int IndexOfAnyExcept<T>(this Span<T> span, T value0, T value1, T value2)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
IndexOfAnyExcept((ReadOnlySpan<T>)span, value0, value1, value2);

/// <summary>Searches for the first index of any value other than the specified <paramref name="values"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.indexofanyexcept?view=net-11.0#system-memoryextensions-indexofanyexcept-1(system-span((-0))-system-readonlyspan((-0)))
public static int IndexOfAnyExcept<T>(this Span<T> span, ReadOnlySpan<T> values)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
IndexOfAnyExcept((ReadOnlySpan<T>)span, values);
}

Expand Down
29 changes: 17 additions & 12 deletions src/Polyfill/Polyfill_Memory_LastIndexOfAnyExcept.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3,17 +3,19 @@
namespace Polyfills;

using System;
using System.Collections.Generic;

static partial class Polyfill
{
/// <summary>Searches from the end for the first index of any value other than the specified <paramref name="value"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-readonlyspan((-0))-0)
public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = span.Length - 1; i >= 0; i--)
{
if (!span[i].Equals(value))
if (!comparer.Equals(span[i], value))
{
return i;
}
Expand All @@ -25,12 +27,13 @@ public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value)
/// <summary>Searches from the end for the first index of any value other than <paramref name="value0"/> or <paramref name="value1"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-readonlyspan((-0))-0-0)
public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T value1)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = span.Length - 1; i >= 0; i--)
{
var item = span[i];
if (!item.Equals(value0) && !item.Equals(value1))
if (!comparer.Equals(item, value0) && !comparer.Equals(item, value1))
{
return i;
}
Expand All @@ -42,12 +45,13 @@ public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T
/// <summary>Searches from the end for the first index of any value other than <paramref name="value0"/>, <paramref name="value1"/>, or <paramref name="value2"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-readonlyspan((-0))-0-0-0)
public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T value1, T value2)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = span.Length - 1; i >= 0; i--)
{
var item = span[i];
if (!item.Equals(value0) && !item.Equals(value1) && !item.Equals(value2))
if (!comparer.Equals(item, value0) && !comparer.Equals(item, value1) && !comparer.Equals(item, value2))
{
return i;
}
Expand All @@ -59,11 +63,12 @@ public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, T value0, T
/// <summary>Searches from the end for the first index of any value other than the specified <paramref name="values"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-readonlyspan((-0))-system-readonlyspan((-0)))
public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, ReadOnlySpan<T> values)
where T : IEquatable<T>
where T : IEquatable<T>?
{
var comparer = EqualityComparer<T>.Default;
for (var i = span.Length - 1; i >= 0; i--)
{
if (!values.Contains(span[i]))
if (!ContainsValue(values, span[i], comparer))
{
return i;
}
Expand All @@ -75,25 +80,25 @@ public static int LastIndexOfAnyExcept<T>(this ReadOnlySpan<T> span, ReadOnlySpa
/// <summary>Searches from the end for the first index of any value other than the specified <paramref name="value"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-span((-0))-0)
public static int LastIndexOfAnyExcept<T>(this Span<T> span, T value)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
LastIndexOfAnyExcept((ReadOnlySpan<T>)span, value);

/// <summary>Searches from the end for the first index of any value other than <paramref name="value0"/> or <paramref name="value1"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-span((-0))-0-0)
public static int LastIndexOfAnyExcept<T>(this Span<T> span, T value0, T value1)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
LastIndexOfAnyExcept((ReadOnlySpan<T>)span, value0, value1);

/// <summary>Searches from the end for the first index of any value other than <paramref name="value0"/>, <paramref name="value1"/>, or <paramref name="value2"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-span((-0))-0-0-0)
public static int LastIndexOfAnyExcept<T>(this Span<T> span, T value0, T value1, T value2)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
LastIndexOfAnyExcept((ReadOnlySpan<T>)span, value0, value1, value2);

/// <summary>Searches from the end for the first index of any value other than the specified <paramref name="values"/>.</summary>
//Link: https://learn.microsoft.com/en-us/dotnet/api/system.memoryextensions.lastindexofanyexcept?view=net-11.0#system-memoryextensions-lastindexofanyexcept-1(system-span((-0))-system-readonlyspan((-0)))
public static int LastIndexOfAnyExcept<T>(this Span<T> span, ReadOnlySpan<T> values)
where T : IEquatable<T> =>
where T : IEquatable<T>? =>
LastIndexOfAnyExcept((ReadOnlySpan<T>)span, values);
}

Expand Down
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