故障解析：.NET开发正则表达式中BUG一例

　　1234567891011121314151617Regex regex = new Regex(@"[/u00FF-/uFFFF]+"); 
　　// The characters, whoes value are smaller than 0xff, are not expected to be matched. 
　　for (int i = 0; i < 0xff; i++) { 
　　string s = new string(new char[] { (char)i }); 
　　Debug.Assert( 
　　!regex.IsMatch(s), 
　　string.Format("The character was not expected to be matched: 0x{0:X}!", i)); 
　　} 
　　// However, the characters whoes value are greater than 0xfe are expected to be matched. 
　　for (int i = 0xff; i <= 0xffff; i++) { 
　　string s = new string(new char[] { (char)i }); 
　　Debug.Assert( 
　　regex.IsMatch(s), 
　　string.Format("The character was expected to be matched: 0x{0:X}!", i)); 
　　}

1234567891011121314151617var re = /[/u00FF-/uFFFF]+/; 
　　// var re = /[/u00FF-/uFFFF]+/i; 
　　for(var i=0; i<0xff; i++) { 
　　var s = String.fromCharCode( i ); 
　　if ( re.test(s) ){ 
　　alert( 'Should not be matched: ' + i + '!' ); 
　　} 
　　} 
　　for(var i=0xff; i<=0xffff; i++) { 
　　var s = String.fromCharCode( i ); 
　　if ( !re.test(s) ){ 
　　alert( 'Should be matched: ' + i + '!' ); 
　　} 
　　}