Import std.text.char

Char

extend

Extend Char

A Char's code, what kind of character it is, and its case.

Public Property Code: Int property #

Its code point, from 0 to 0x10FFFF.
Public Property Utf8Length: Int property #

How many bytes it takes in UTF-8: 1 to 4.
Public Static Method From(code: Int): Char? static method #
The Char of a code point, or Null for one that isn't a Unicode scalar value: below 0, past 0x10FFFF, or a surrogate, 0xD800 to 0xDFFF.

Examples
```
Expect('A'.Code == 65)
Expect(Char.From(0x1F600)?.Utf8Length == 4)
Expect(Char.From(0xD800) == Null)
```

Public Method IsLetter(): Bool method #

Whether it's a letter, of any case or none, as in "é", "ж", or "中".

Expect('a'.IsLetter() && !'7'.IsLetter())
Expect('7'.IsDigit() && ' '.IsWhitespace())
Expect('é'.ToUpper() == 'É')

Public Method IsDigit(): Bool method #

Whether it's a decimal digit, of any script, like "7" or "٣".
Public Method IsNumber(): Bool method #

Whether it's a number of any kind: a decimal digit, a letter like a Roman numeral, or another like "½".
Public Method IsLetterOrDigit(): Bool method #

Whether it's a letter or a decimal digit.
Public Method IsUpper(): Bool method #

Whether it's an uppercase letter.
Public Method IsLower(): Bool method #

Whether it's a lowercase letter.
Public Method IsPunctuation(): Bool method #

Whether it's punctuation, like "," or "¿".
Public Method IsControl(): Bool method #

Whether it's a control character, like a tab or a line break.
Public Method IsWhitespace(): Bool method #

Whether it's whitespace, as Unicode's White_Space has it: a space of any width, a tab, a line or paragraph break, and the like.
Public Method IsAscii(): Bool method #

Whether it's ASCII, U+0000 to U+007F.
Public Method ToUpper(): Char method #

Its own uppercase, or itself when it has none. A String's ToUpper turns "ß" into "SS", which one Char can't hold.
Public Method ToLower(): Char method #

Its own lowercase, or itself when it has none.

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