Either I'm missing something or .NET is

Richard Deeming

I don't know enough about UTF-32, but what about: Char.IsHighSurrogate Method (System) | Microsoft Docs[^] Char.ConvertToUtf32 Method (System) | Microsoft Docs[^] Char.ConvertFromUtf32(Int32) Method (System) | Microsoft Docs[^] Or maybe Jon Skeet's article will have something useful: Unicode and .NET[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

OriginalGriff

Um ... Char.IsWhiteSpace Method (System) | Microsoft Docs[^] and Char.GetUnicodeCategory Method (System) | Microsoft Docs[^] Or am I missing something?

"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony AntiTwitter: @DalekDave is now a follower!

Lost User

What is about Char.IsWhiteSpace Method (System) | Microsoft Docs[^]

It does not solve my Problem, but it answers my question

honey the codewitch

Only works for 16 bit unicode values. Not these 32bit surrogates

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honey the codewitch

Okay yes, but once i have that converted (either to a 32bit int, or a double-char string, i can't do anything with it. I can't call char.IsWhiteSpace with it. I can't do anything but print its value. Which is stupid

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Richard Deeming

ASCII FTW! 127 characters should be enough for anyone! :-D I'm not sure there are any whitespace characters that would be encoded as a surrogate pair: Whitespace character - Wikipedia[^]

"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

RugbyLeague

"So what the hell are you supposed to do with these values" hope they never appear.

RugbyLeague

And EBCDIC - everybody always forgets EBCDIC :sigh:

honey the codewitch

Pretty much! :thumbsup:

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honey the codewitch

I've encountered a weird one. But I don't remember if it was a surrogate or not. I just remember it didn't print to the console properly (it cooked it) or didn't save to source as a literal value or something. It came up as whitespace, but only when I used these huge "not ranges" which are like [^a-z] (anything but a lower case letter) that "anything" part created ranges all throughout the 16-bit unicode spectrum. And that's when I ran into issues with one whitespace character.

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Greg Utas

And sixbit on DEC's PDP systems!

Dr Walt Fair PE

Actually Baudot it sufficient at 5 bits. CQ de W5ALT

Walt Fair, Jr.PhD P. E. Comport Computing Specializing in Technical Engineering Software

BillWoodruff

idea: research using Unicode categories in your RegEx ? [^]

«One day it will have to be officially admitted that what we have christened reality is an even greater illusion than the world of dreams.» Salvador Dali

honey the codewitch

I am using those. The category for surrogates is surrogate. Not helpful. Combining a hi and lo surrogate you get a 2 char string. The 2 char string cannot be queried for its unicode category in .NET AFAIK

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BillWoodruff

honey the codewitch wrote:

The 2 char string cannot be queried for its unicode category in .NET AFAIK

It is a mess, but, check this against what you expect, now:

public void PrintUniCodeRange(int sc, int ec)
{
bool isKey;

string key = "";

for (int i = sc; i <= ec; i++)
{
    string ucString = char.ConvertFromUtf32(i);
    
    isKey = i < 256;

    if (isKey) key = ((Keys)Enum.Parse(typeof(Keys), i.ToString())).ToString();

    UnicodeCategory cat = Char.GetUnicodeCategory(ucString, 0);

    if (cat != UnicodeCategory.OtherNotAssigned)
    {
        Console.WriteLine($"#{i} | Unicode Category: {cat} {(isKey ? "! Keys Enum: " + key : "")}");
    }
}

}

Calling the above with 8192 to 8233 parameters:

honey the codewitch

hmm, I wonder what my test was doing wrong, because GetUnicodeCategory(string, int) was returning only single char values for me i thought. maybe i had a bug

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honey the codewitch

Thank you! Turns out there was a bug in my code where i wasn't passing doublechar strings in. They ended up single char.

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User 2893688

Will someone please think about the children. [https://tenor.com/FJmS.gif\](https://tenor.com/FJmS.gif)