【Kotlin】全角から半角へ置換する

/*
=========================================================
[概  要] 全角から半角へ置換する
[引  数] target        : 変換対象の文字列
[戻り値] 変換後の文字列
[備  考]
=========================================================
*/
fun convertIntoHalfFromFull(target : String ):String
{
    var str : String

    //アルファベット（大文字）の変換
    str = target.replace("Ａ","A" ).replace("Ｂ","B" ).replace("Ｃ","C" ).replace("Ｄ","D" ).replace("Ｅ","E" ).replace("Ｆ","F" ).replace("Ｇ","G" ).replace("Ｈ","H" ).replace("Ｉ","I" ).replace("Ｊ","J" ).replace("Ｋ","K" ).replace("Ｌ","L" ).replace("Ｍ","M" ).replace("Ｎ","N" ).replace("Ｏ","O" ).replace("Ｐ","P" ).replace("Ｑ","Q" ).replace("Ｒ","R" ).replace("Ｓ","S" ).replace("Ｔ","T" ).replace("Ｕ","U" ).replace("Ｖ","V" ).replace("Ｗ","W" ).replace("Ｘ","X" ).replace("Ｙ","Y" ).replace("Ｚ","Z" ) 
    //アルファベット（小文字）の変換
    str = str.replace("ａ","a" ).replace("ｂ","b" ).replace("ｃ","c" ).replace("ｄ","d" ).replace("ｅ","e" ).replace("ｆ","f" ).replace("ｇ","g" ).replace("ｈ","h" ).replace("ｉ","i" ).replace("ｊ","j" ).replace("ｋ","k" ).replace("ｌ","l" ).replace("ｍ","m" ).replace("ｎ","n" ).replace("ｏ","o" ).replace("ｐ","p" ).replace("ｑ","q" ).replace("ｒ","r" ).replace("ｓ","s" ).replace("ｔ","t" ).replace("ｕ","u" ).replace("ｖ","v" ).replace("ｗ","w" ).replace("ｘ","x" ).replace("ｙ","y" ).replace("ｚ","z" )
    //数値の変換
    str = str.replace("０","0" ).replace("１","1" ).replace("２","2" ).replace("３","3" ).replace("４","4" ).replace("５","5" ).replace("６","6" ).replace("７","7" ).replace("８","8" ).replace("９","9" )
    //カタカナの変換
    str = str.replace("ア","ｱ" ).replace("イ","ｲ" ).replace("ウ","ｳ" ).replace("エ","ｴ" ).replace("オ","ｵ" ).replace("カ","ｶ" ).replace("キ","ｷ" ).replace("ク","ｸ" ).replace("ケ","ｹ" ).replace("コ","ｺ" ).replace("サ","ｻ" ).replace("シ","ｼ" ).replace("ス","ｽ" ).replace("セ","ｾ" ).replace("ソ","ｿ" ).replace("タ","ﾀ" ).replace("チ","ﾁ" ).replace("ツ","ﾂ" ).replace("テ","ﾃ" ).replace("ト","ﾄ" ).replace("ナ","ﾅ" ).replace("ニ","ﾆ" ).replace("ヌ","ﾇ" ).replace("ネ","ﾈ" ).replace("ノ","ﾉ" ).replace("ハ","ﾊ" ).replace("ヒ","ﾋ" ).replace("フ","ﾌ" ).replace("ヘ","ﾍ" ).replace("ホ","ﾎ" ).replace("マ","ﾏ" ).replace("ミ","ﾐ" ).replace("ム","ﾑ" ).replace("メ","ﾒ" ).replace("モ","ﾓ" ).replace("ヤ","ﾔ" ).replace("ユ","ﾕ" ).replace("ヨ","ﾖ" ).replace("ラ","ﾗ" ).replace("リ","ﾘ" ).replace("ル","ﾙ" ).replace("レ","ﾚ" ).replace("ロ","ﾛ" ).replace("ワ","ﾜ" ).replace("ヲ","ｦ" ).replace("ン","ﾝ" ).replace("ァ","ｧ" ).replace("ィ","ｨ" ).replace("ゥ","ｩ" ).replace("ェ","ｪ" ).replace("ォ","ｫ" ).replace("ヵ","ｶ" ).replace("ヶ","ｹ" ).replace("ッ","ｯ" ).replace("ャ","ｬ" ).replace("ュ","ｭ" ).replace("ョ","ｮ" ).replace("ヮ","ﾜ" ).replace("ヴ","ｳﾞ" ).replace("ガ","ｶﾞ" ).replace("ギ","ｷﾞ" ).replace("グ","ｸﾞ" ).replace("ゲ","ｹﾞ" ).replace("ゴ","ｺﾞ" ).replace("ザ","ｻﾞ" ).replace("ジ","ｼﾞ" ).replace("ズ","ｽﾞ" ).replace("ゼ","ｾﾞ" ).replace("ゾ","ｿﾞ" ).replace("ダ","ﾀﾞ" ).replace("ヂ","ﾁﾞ" ).replace("ヅ","ﾂﾞ" ).replace("デ","ﾃﾞ" ).replace("ド","ﾄﾞ" ).replace("バ","ﾊﾞ" ).replace("ビ","ﾋﾞ" ).replace("ブ","ﾌﾞ" ).replace("ベ","ﾍﾞ" ).replace("ボ","ﾎﾞ" ).replace("パ","ﾊﾟ" ).replace("ピ","ﾋﾟ" ).replace("プ","ﾌﾟ" ).replace("ペ","ﾍﾟ" ).replace("ポ","ﾎﾟ" )
    //記号の変換
    str = str.replace("！","!" ).replace("＃","#" ).replace("＄","$" ).replace("％","%" ).replace("＆","&" ).replace("（","(" ).replace("）",")" ).replace("ー","ｰ" ).replace("－","-" ).replace("＝","=" ).replace("＾","^" ).replace("～","~" ).replace("｜","|" ).replace("＠","@" ).replace("‘","`" ).replace("「","｢" ).replace("［","[" ).replace("｛","{" ).replace("＋","+" ).replace("：",":" ).replace("＊","*" ).replace("」","｣" ).replace("］","]" ).replace("｝","}" ).replace("、","､" ).replace("，","," ).replace("＜","<" ).replace("。","｡" ).replace("．","." ).replace("＞",">" ).replace("・","･" ).replace("／","/" ).replace("？","?" ).replace("＿","_" )
    
    return str 
}

println(convertIntoHalfFromFull("ＡＢＣＤＥｆｇｈｉアイウ１２３！＃＄％"))  --//ABCDEfghiｱｲｳ123!#$%