Incorrect code generation with existential operator inside brackets

[Diggsey]

The following code will alert the value "true", when clearly the only two possible outputs of the "if" are the string or undefined. It seems like coffeescript doesn't properly understand the precedence rules for the javascript ternary operator. Removing the brackets from the condition will miraculously fix it...

f = -> true

result = if (f?()) then "THIS SHOULD BE ALERTED!"

alert result