Span<T> Struct

Reference

Definition

Namespace:: System

Assembly:: System.Runtime.dll

Assembly:: System.Memory.dll

Assembly:: netstandard.dll

Package:: System.Memory v4.6.0

Source:: Span.cs

Source:: Span.cs

Source:: Span.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Provides a type-safe and memory-safe representation of a contiguous region of arbitrary memory.

generic <typename T>
public value class Span

public readonly ref struct Span<T>

[System.Runtime.InteropServices.Marshalling.NativeMarshalling(typeof(System.Runtime.InteropServices.Marshalling.SpanMarshaller<,>))]
public readonly ref struct Span<T>

type Span<'T> = struct

[<System.Runtime.InteropServices.Marshalling.NativeMarshalling(typeof(System.Runtime.InteropServices.Marshalling.SpanMarshaller<,>))>]
type Span<'T> = struct

Public Structure Span(Of T)

Type Parameters

T

The type of items in the Span<T>.

Inheritance: Object

ValueType
Span<T>

Attributes: NativeMarshallingAttribute

Remarks

For more information about this API, see Supplemental API remarks for Span<T>.

Constructors

Span<T>(T)	Creates a new Span<T> of length 1 around the specified reference.
Span<T>(T[], Int32, Int32)	Creates a new Span<T> object that includes a specified number of elements of an array starting at a specified index.
Span<T>(T[])	Creates a new Span<T> object over the entirety of a specified array.
Span<T>(Void*, Int32)	Creates a new Span<T> object from a specified number of `T` elements starting at a specified memory address.

Properties

Empty	Returns an empty Span<T> object.
IsEmpty	Returns a value that indicates whether the current Span<T> is empty.
Item[Int32]	Gets the element at the specified zero-based index.
Length	Returns the length of the current span.

Methods

Clear()	Clears the contents of this Span<T> object.
CopyTo(Span<T>)	Copies the contents of this Span<T> into a destination Span<T>.
Equals(Object)	Obsolete. Obsolete. Calls to this method are not supported.
Fill(T)	Fills the elements of this span with a specified value.
GetEnumerator()	Returns an enumerator for this Span<T>.
GetHashCode()	Obsolete. Throws a NotSupportedException.
GetPinnableReference()	Returns a reference to an object of type T that can be used for pinning. This method is intended to support .NET compilers and is not intended to be called by user code.
Slice(Int32, Int32)	Forms a slice out of the current span starting at a specified index for a specified length.
Slice(Int32)	Forms a slice out of the current span that begins at a specified index.
ToArray()	Copies the contents of this span into a new array.
ToString()	Returns the string representation of this Span<T> object.
TryCopyTo(Span<T>)	Attempts to copy the current Span<T> to a destination Span<T> and returns a value that indicates whether the copy operation succeeded.

Operators

Equality(Span<T>, Span<T>)	Returns a value that indicates whether two Span<T> objects are equal.
Implicit(ArraySegment<T> to Span<T>)	Defines an implicit conversion of an ArraySegment<T> to a Span<T>.
Implicit(Span<T> to ReadOnlySpan<T>)	Defines an implicit conversion of a Span<T> to a ReadOnlySpan<T>.
Implicit(T[] to Span<T>)	Defines an implicit conversion of an array to a Span<T>.
Inequality(Span<T>, Span<T>)	Returns a value that indicates whether two Span<T> objects are not equal.

Extension Methods

ToImmutableArray<T>(Span<T>)	Converts the span to an immutable array.
BinarySearch<T>(Span<T>, IComparable<T>)	Searches an entire sorted Span<T> for a value using the specified IComparable<T> generic interface.
BinarySearch<T,TComparer>(Span<T>, T, TComparer)	Searches an entire sorted Span<T> for a specified value using the specified `TComparer` generic type.
BinarySearch<T,TComparable>(Span<T>, TComparable)	Searches an entire sorted Span<T> for a value using the specified `TComparable` generic type.
CommonPrefixLength<T>(Span<T>, ReadOnlySpan<T>, IEqualityComparer<T>)	Finds the length of any common prefix shared between `span` and `other`.
CommonPrefixLength<T>(Span<T>, ReadOnlySpan<T>)	Finds the length of any common prefix shared between `span` and `other`.
Contains<T>(Span<T>, T)	Indicates whether a specified value is found in a span. Values are compared using IEquatable{T}.Equals(T).
ContainsAny<T>(Span<T>, T, T, T)	Searches for an occurrence of `value0`, `value1`, or `value2`, and returns `true` if found. If not found, returns `false`.
ContainsAny<T>(Span<T>, T, T)	Searches for an occurrence of `value0` or `value1`, and returns `true` if found. If not found, returns `false`.
ContainsAny<T>(Span<T>, SearchValues<T>)	Searches for an occurrence of any of the specified `values` and returns `true` if found. If not found, returns `false`.
ContainsAny<T>(Span<T>, ReadOnlySpan<T>)	Searches for an occurrence of any of the specified `values` and returns `true` if found. If not found, returns `false`.
ContainsAnyExcept<T>(Span<T>, T, T, T)	Searches for any value other than `value0`, `value1`, or `value2`.
ContainsAnyExcept<T>(Span<T>, T, T)	Searches for any value other than `value0` or `value1`.
ContainsAnyExcept<T>(Span<T>, T)	Searches for any value other than the specified `value`.
ContainsAnyExcept<T>(Span<T>, SearchValues<T>)	Searches for any value other than the specified `values`.
ContainsAnyExcept<T>(Span<T>, ReadOnlySpan<T>)	Searches for any value other than the specified `values`.
ContainsAnyExceptInRange<T>(Span<T>, T, T)	Searches for any value outside of the range between `lowInclusive` and `highInclusive`, inclusive.
ContainsAnyInRange<T>(Span<T>, T, T)	Searches for any value in the range between `lowInclusive` and `highInclusive`, inclusive, and returns `true` if found. If not found, returns `false`.
Count<T>(Span<T>, T)	Counts the number of times the specified `value` occurs in the `span`.
Count<T>(Span<T>, ReadOnlySpan<T>)	Counts the number of times the specified `value` occurs in the `span`.
EndsWith<T>(Span<T>, ReadOnlySpan<T>)	Determines whether the specified sequence appears at the end of a span.
IndexOf<T>(Span<T>, T)	Searches for the specified value and returns the index of its first occurrence. Values are compared using IEquatable{T}.Equals(T).
IndexOf<T>(Span<T>, ReadOnlySpan<T>)	Searches for the specified sequence and returns the index of its first occurrence. Values are compared using IEquatable{T}.Equals(T).
IndexOfAny<T>(Span<T>, T, T, T)	Searches for the first index of any of the specified values similar to calling IndexOf several times with the logical OR operator.
IndexOfAny<T>(Span<T>, T, T)	Searches for the first index of any of the specified values similar to calling IndexOf several times with the logical OR operator.
IndexOfAny<T>(Span<T>, SearchValues<T>)	Searches for the first index of any of the specified values.
IndexOfAny<T>(Span<T>, ReadOnlySpan<T>)	Searches for the first index of any of the specified values similar to calling IndexOf several times with the logical OR operator.
IndexOfAnyExcept<T>(Span<T>, T, T, T)	Searches for the first index of any value other than the specified `value0`, `value1`, or `value2`.
IndexOfAnyExcept<T>(Span<T>, T, T)	Searches for the first index of any value other than the specified `value0` or `value1`.
IndexOfAnyExcept<T>(Span<T>, T)	Searches for the first index of any value other than the specified `value`.
IndexOfAnyExcept<T>(Span<T>, SearchValues<T>)	Searches for the first index of any value other than the specified `values`.
IndexOfAnyExcept<T>(Span<T>, ReadOnlySpan<T>)	Searches for the first index of any value other than the specified `values`.
IndexOfAnyExceptInRange<T>(Span<T>, T, T)	Searches for the first index of any value outside of the range between `lowInclusive` and `highInclusive`, inclusive.
IndexOfAnyInRange<T>(Span<T>, T, T)	Searches for the first index of any value in the range between `lowInclusive` and `highInclusive`, inclusive.
LastIndexOf<T>(Span<T>, T)	Searches for the specified value and returns the index of its last occurrence. Values are compared using IEquatable{T}.Equals(T).
LastIndexOf<T>(Span<T>, ReadOnlySpan<T>)	Searches for the specified sequence and returns the index of its last occurrence. Values are compared using IEquatable{T}.Equals(T).
LastIndexOfAny<T>(Span<T>, T, T, T)	Searches for the last index of any of the specified values similar to calling LastIndexOf several times with the logical OR operator.
LastIndexOfAny<T>(Span<T>, T, T)	Searches for the last index of any of the specified values similar to calling LastIndexOf several times with the logical OR operator.
LastIndexOfAny<T>(Span<T>, SearchValues<T>)	Searches for the last index of any of the specified values.
LastIndexOfAny<T>(Span<T>, ReadOnlySpan<T>)	Searches for the last index of any of the specified values similar to calling LastIndexOf several times with the logical OR operator.
LastIndexOfAnyExcept<T>(Span<T>, T, T, T)	Searches for the last index of any value other than the specified `value0`, `value1`, or `value2`.
LastIndexOfAnyExcept<T>(Span<T>, T, T)	Searches for the last index of any value other than the specified `value0` or `value1`.
LastIndexOfAnyExcept<T>(Span<T>, T)	Searches for the last index of any value other than the specified `value`.
LastIndexOfAnyExcept<T>(Span<T>, SearchValues<T>)	Searches for the last index of any value other than the specified `values`.
LastIndexOfAnyExcept<T>(Span<T>, ReadOnlySpan<T>)	Searches for the last index of any value other than the specified `values`.
LastIndexOfAnyExceptInRange<T>(Span<T>, T, T)	Searches for the last index of any value outside of the range between `lowInclusive` and `highInclusive`, inclusive.
LastIndexOfAnyInRange<T>(Span<T>, T, T)	Searches for the last index of any value in the range between `lowInclusive` and `highInclusive`, inclusive.
Overlaps<T>(Span<T>, ReadOnlySpan<T>, Int32)	Determines whether a span and a read-only span overlap in memory and outputs the element offset.
Overlaps<T>(Span<T>, ReadOnlySpan<T>)	Determines whether a span and a read-only span overlap in memory.
Replace<T>(Span<T>, T, T)	Replaces all occurrences of `oldValue` with `newValue`.
Reverse<T>(Span<T>)	Reverses the sequence of the elements in the entire span.
SequenceCompareTo<T>(Span<T>, ReadOnlySpan<T>)	Determines the relative order of a span and a read-only span by comparing the elements using IComparable{T}.CompareTo(T).
SequenceEqual<T>(Span<T>, ReadOnlySpan<T>, IEqualityComparer<T>)	Determines whether two sequences are equal by comparing the elements using an IEqualityComparer<T>.
SequenceEqual<T>(Span<T>, ReadOnlySpan<T>)	Determines whether a span and a read-only span are equal by comparing the elements using IEquatable{T}.Equals(T).
Sort<T>(Span<T>, Comparison<T>)	Sorts the elements in the entire Span<T> using the specified Comparison<T>.
Sort<T>(Span<T>)	Sorts the elements in the entire Span<T> using the IComparable<T> implementation of each element of the Span<T>.
Sort<T,TComparer>(Span<T>, TComparer)	Sorts the elements in the entire Span<T> using the `TComparer`.
Sort<TKey,TValue>(Span<TKey>, Span<TValue>, Comparison<TKey>)	Sorts a pair of spans (one containing the keys and the other containing the corresponding items) based on the keys in the first Span<T> using the specified comparison.
Sort<TKey,TValue>(Span<TKey>, Span<TValue>)	Sorts a pair of spans (one containing the keys and the other containing the corresponding items) based on the keys in the first Span<T> using the IComparable<T> implementation of each key.
Sort<TKey,TValue,TComparer>(Span<TKey>, Span<TValue>, TComparer)	Sorts a pair of spans (one containing the keys and the other containing the corresponding items) based on the keys in the first Span<T> using the specified comparer.
StartsWith<T>(Span<T>, ReadOnlySpan<T>)	Determines whether a specified sequence appears at the start of a span.
Trim<T>(Span<T>, T)	Removes all leading and trailing occurrences of a specified element from a span.
Trim<T>(Span<T>, ReadOnlySpan<T>)	Removes all leading and trailing occurrences of a set of elements specified in a read-only span from a span.
TrimEnd<T>(Span<T>, T)	Removes all trailing occurrences of a specified element from a span.
TrimEnd<T>(Span<T>, ReadOnlySpan<T>)	Removes all trailing occurrences of a set of elements specified in a read-only span from a span.
TrimStart<T>(Span<T>, T)	Removes all leading occurrences of a specified element from the span.
TrimStart<T>(Span<T>, ReadOnlySpan<T>)	Removes all leading occurrences of a set of elements specified in a read-only span from the span.

Applies to

共用方式為