private const string NON_LATIN_HASHTAG_CHARS = @"\u0400-\u04ff\u0500-\u0527\u1100-\u11ff\u3130-\u3185\uA960-\uA97F\uAC00-\uD7AF\uD7B0-\uD7FF";
private const string CJ_HASHTAG_CHARACTERS = @"\u30A1-\u30FA\u30FC\u3005\uFF66-\uFF9F\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\u3041-\u309A\u3400-\u4DBF\p{IsCJKUnifiedIdeographs}";
private const string HASHTAG_BOUNDARY = @"^|$|\s|「|」|。|\.|!";
- private const string HASHTAG_ALPHA = "[a-z_" + LATIN_ACCENTS + NON_LATIN_HASHTAG_CHARS + CJ_HASHTAG_CHARACTERS + "]";
- private const string HASHTAG_ALPHANUMERIC = "[a-z0-9_" + LATIN_ACCENTS + NON_LATIN_HASHTAG_CHARS + CJ_HASHTAG_CHARACTERS + "]";
- private const string HASHTAG_TERMINATOR = "[^a-z0-9_" + LATIN_ACCENTS + NON_LATIN_HASHTAG_CHARS + CJ_HASHTAG_CHARACTERS + "]";
+ private const string HASHTAG_ALPHA = "[A-Za-z_" + LATIN_ACCENTS + NON_LATIN_HASHTAG_CHARS + CJ_HASHTAG_CHARACTERS + "]";
+ private const string HASHTAG_ALPHANUMERIC = "[A-Za-z0-9_" + LATIN_ACCENTS + NON_LATIN_HASHTAG_CHARS + CJ_HASHTAG_CHARACTERS + "]";
+ private const string HASHTAG_TERMINATOR = "[^A-Za-z0-9_" + LATIN_ACCENTS + NON_LATIN_HASHTAG_CHARS + CJ_HASHTAG_CHARACTERS + "]";
public const string HASHTAG = "(" + HASHTAG_BOUNDARY + ")(#|#)(" + HASHTAG_ALPHANUMERIC + "*" + HASHTAG_ALPHA + HASHTAG_ALPHANUMERIC + "*)(?=" + HASHTAG_TERMINATOR + "|" + HASHTAG_BOUNDARY + ")";
//URL正規表現
private const string url_valid_preceding_chars = @"(?:[^A-Za-z0-9@@$##\ufffe\ufeff\uffff\u202a-\u202e]|^)";