body { @hello: "world"; border: e("this is simple"); border: e(this is simple); // bug in lessjs border: e("this is simple", "cool lad"); border: e(1232); border: e(@hello); border: e("one" + 'more'); // no string addition lessjs border: e(); // syntax error lessjs line-height: ~"eating rice"; line-height: ~"string cheese"; line-height: a b c ~"string me" d e f; line-height: ~"string @{hello}"; } .class { filter: ~"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='image.png')"; }