How to define a ternary operator in Scala which preserves leading tokens?
- by Alex R
I'm writing a code generator which produces Scala output.
I need to emulate a ternary operator in such a way that the tokens leading up to '?' remain intact.
e.g. convert the expression c ? p : q to c something. The simple if(c) p else q fails my criteria, as it requires putting if( before c.
My first attempt (still using c/p/q as above) is
c match { case(true) = p; case _ = q }
another option I found was:
class ternary(val g: Boolean = Any) { def |: (b:Boolean) = g(b) }
implicit def autoTernary (g: Boolean = Any): ternary = new ternary(g)
which allows me to write:
c |: { b: Boolean = if(b) p else q }
I like the overall look of the second option, but is there a way to make it less verbose?
Thanks
