<span style="background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; line-height: 17.804800033569336px;"></span><pre name="code" class="plain">var ivar = [:]
ivar.className // __NSDictionaryI

var i = 1
i.className // error: 'Int' does not have a member named 'className'

<span style="background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; line-height: 17.804800033569336px;">If you want to get the type of a primitive, you have to use </span><code style="padding: 1px 5px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; color: rgb(221, 17, 68); background-color: rgb(238, 238, 238); border: 0px; line-height: 17.804800033569336px; margin: 0px; vertical-align: baseline; white-space: pre-wrap;">bridgeToObjectiveC()</code><span style="background-color: rgb(255, 255, 255); color: rgb(51, 51, 51); font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; line-height: 17.804800033569336px;">. Example:</span>

var i = 1
i.bridgeToObjectiveC().className // __NSCFNumber






println("\(object_getClassName(now))");