1 
use crate::unicode::bool_prop_emoji_presentation;
2 

            

        

            

                3
            

            

                
            

            

                
pub fn is_cjk_letter(ch: char) -> bool {

            

        

            

                4
            

            

                
            

            

                
    match ch as u32 {

            

        

            

                5
            

            

                
            

            

                
        // Hiragana, Katakana

            

        

            

                6
            

            

                
            

            

                
        0x3040..=0x30FF => true,

            

        

            

                7
            

            

                
            

            

                
        // Katakana Phonetic Extensions

            

        

            

                8
            

            

                
            

            

                
        0x31F0..=0x31FF => true,

            

        

            

                9
            

            

                
            

            

                
        // CJK Unified Ideographs Extension A

            

        

            

                10
            

            

                
            

            

                
        0x3400..=0x4DFF => true,

            

        

            

                11
            

            

                
            

            

                
        // CJK Unified Ideographs

            

        

            

                12
            

            

                
            

            

                
        0x4E00..=0x9FFF => true,

            

        

            

                13
            

            

                
            

            

                
        // Hangul Syllables

            

        

            

                14
            

            

                
            

            

                
        0xAC00..=0xD7A3 => true,

            

        

            

                15
            

            

                
            

            

                
        // CJK Compatibility Ideographs

            

        

            

                16
            

            

                
            

            

                
        0xF900..=0xFAFF => true,

            

        

            

                17
            

            

                
            

            

                
        // CJK Unified Ideographs Extension B

            

        

            

                18
            

            

                
            

            

                
        0x20000..=0x2A6DF => true,

            

        

            

                19
            

            

                
            

            

                
        // CJK Compatibility Ideographs Supplement

            

        

            

                20
            

            

                
            

            

                
        0x2F800..=0x2FA1F => true,

            

        

            

                21
            

            

                
            

            

                
        _ => false,

            

        

            

                22
            

            

                
            

            

                
    }

            

        

            

                23
            

            

                
            

            

                
}

            

        

            

                24
            

            

                
            

            

                

            

        

            

                25
            

            

                
            

            

                
pub fn is_upright_char(ch: char) -> bool {

            

        

            

                26
            

            

                
            

            

                
    let u = ch as u32;

            

        

            

                27
            

            

                
            

            

                
    match u {

            

        

            

                28
            

            

                
            

            

                
        _ if is_cjk_letter(ch) => true,

            

        

            

                29
            

            

                
            

            

                
        // CJK Symbols and Punctuation

            

        

            

                30
            

            

                
            

            

                
        0x3000..=0x303F => {

            

        

            

                31
            

            

                
            

            

                
            // but not brackets or wave dashes

            

        

            

                32
            

            

                
            

            

                
            match u {

            

        

            

                33
            

            

                
            

            

                
                0x3008..=0x3011 => false,

            

        

            

                34
            

            

                
            

            

                
                0x3014..=0x301C => false,

            

        

            

                35
            

            

                
            

            

                
                0x3030 => false,

            

        

            

                36
            

            

                
            

            

                
                _ => true,

            

        

            

                37
            

            

                
            

            

                
            }

            

        

            

                38
            

            

                
            

            

                
        }

            

        

            

                39
            

            

                
            

            

                
        // Vertical Forms

            

        

            

                40
            

            

                
            

            

                
        0xFE10..=0xFE1F => true,

            

        

            

                41
            

            

                
            

            

                
        // CJK Compatibility Forms

            

        

            

                42
            

            

                
            

            

                
        0xFE30..=0xFE4F => true,

            

        

            

                43
            

            

                
            

            

                
        // Small Form Variants

            

        

            

                44
            

            

                
            

            

                
        0xFE50..=0xFE6F => {

            

        

            

                45
            

            

                
            

            

                
            match u {

            

        

            

                46
            

            

                
            

            

                
                // but not brackets

            

        

            

                47
            

            

                
            

            

                
                0xFE59..=0xFE5E => false,

            

        

            

                48
            

            

                
            

            

                
                _ => true,

            

        

            

                49
            

            

                
            

            

                
            }

            

        

            

                50
            

            

                
            

            

                
        }

            

        

            

                51
            

            

                
            

            

                
        // Halfwidth and Fullwidth Forms

            

        

            

                52
            

            

                
            

            

                
        0xFF00..=0xFFEF => {

            

        

            

                53
            

            

                
            

            

                
            // but not brackets or wave dashes

            

        

            

                54
            

            

                
            

            

                
            match u {

            

        

            

                55
            

            

                
            

            

                
                0xFF08 | 0xFF09 | 0xFF3B | 0xFF3D | 0xFF5B | 0xFF5D | 0xFF5E | 0xFF5F | 0xFF60

            

        

            

                56
            

            

                
            

            

                
                | 0xFF62 | 0xFF63 => false,

            

        

            

                57
            

            

                
            

            

                
                _ => true,

            

        

            

                58
            

            

                
            

            

                
            }

            

        

            

                59
            

            

                
            

            

                
        }

            

        

            

                60
            

            

                
            

            

                
        // Emoji

            

        

            

                61
            

            

                
            

            

                
        _ if bool_prop_emoji_presentation(ch) => true,

            

        

            

                62
            

            

                
            

            

                
        _ => false,

            

        

            

                63
            

            

                
            

            

                
    }

            

        

            

                64
            

            

                
            

            

                
}