isTrue

Checks if the nullable Boolean is true.

This function provides a safe way to check for true on a Boolean? value. Unlike a direct == true comparison, this function uses contracts to enable smart-casting of the receiver to a non-nullable Boolean within the scope where this function returns true.

Example:

fun process(data: Boolean?) {
    if (data.isTrue()) {
        // 'data' is smart-cast to a non-nullable Boolean here
        println("Data is definitely true.")
    } else {
        // 'data' could be false or null
        println("Data is either false or null.")
    }
}