Edited by @tarekgh
Background and motivation
If we try to verify that the string represented by ReadOnlySpan<char> is Unicode normalized, we currently have to turn it into a string once.
Overloading for ReadOnlySpan<char> is needed to reduce allocation.
API Proposal
namespace System;
// Doesn't throw on the operation even when having wrong character sequence.
public static class StringNormalizationExtensions {
+ public static bool IsNormalized(this ReadOnlySpan<char> source, NormalizationForm normalizationForm = NormalizationForm.FormC); // will return false in invalid sequence
+ public static OperationStatus TryNormalize(this ReadOnlySpan<char> source, Span<char> destination, out int charsWritten, NormalizationForm normalizationForm = NormalizationForm.FormC);
}Original Proposal - Alternative Proposal
namespace System;
// throws on wrong sequence as String.Normalize does.
public static class StringNormalizationExtensions {
+ public static bool IsNormalized(this ReadOnlySpan<char> strInput, NormalizationForm normalizationForm = NormalizationForm.FormC);
+ public static bool TryNormalize(this ReadOnlySpan<char> strInput, Span<char> destination, out int charsWritten, NormalizationForm normalizationForm = NormalizationForm.FormC);
}API Usage
ReadOnlySpan<char> partOfhugeArray = hugeArray.AsSpan(start, length);
if (!partOfhugeArray.IsNormalized())
throw new Exception("Text must be Unicode normalized.");
/// ...No response
Risks
No response
Edited by @tarekgh
Background and motivation
If we try to verify that the string represented by
ReadOnlySpan<char>is Unicode normalized, we currently have to turn it into astringonce.Overloading for
ReadOnlySpan<char>is needed to reduce allocation.API Proposal
namespace System; // Doesn't throw on the operation even when having wrong character sequence. public static class StringNormalizationExtensions { + public static bool IsNormalized(this ReadOnlySpan<char> source, NormalizationForm normalizationForm = NormalizationForm.FormC); // will return false in invalid sequence + public static OperationStatus TryNormalize(this ReadOnlySpan<char> source, Span<char> destination, out int charsWritten, NormalizationForm normalizationForm = NormalizationForm.FormC); }Original Proposal - Alternative Proposal
namespace System; // throws on wrong sequence as String.Normalize does. public static class StringNormalizationExtensions { + public static bool IsNormalized(this ReadOnlySpan<char> strInput, NormalizationForm normalizationForm = NormalizationForm.FormC); + public static bool TryNormalize(this ReadOnlySpan<char> strInput, Span<char> destination, out int charsWritten, NormalizationForm normalizationForm = NormalizationForm.FormC); }API Usage
No response
Risks
No response