`alloc`, an alternative to `new`, with better syntax and type inference

alloc.scala

Welcome to Scala version 2.10.5 (OpenJDK 64-Bit Server VM, Java 1.6.0_27).
Type in expressions to have them evaluated.
Type :help for more information.

scala> import rapture.core._
import rapture.core._

scala> val str: String = alloc() // new String()
str: String = ""

scala> val date: java.util.Date = alloc() // new java.util.Date()
date: java.util.Date = Sat Mar 21 23:33:20 CET 2015

scala> val sb = alloc[StringBuilder]() // new StringBuilder()
sb: StringBuilder =

scala> val exc: RuntimeException = alloc("Error message") // new RuntimeException("Error message")
exc: RuntimeException = java.lang.RuntimeException: Error message

scala> case class Tc[T](val default: T)
defined class Tc

// Particularly useful for removing repetition in an implicit's type and constructor call
scala> implicit val stringTc: Tc[String] = alloc("foo")
stringTc: Tc[String] = Tc@5e4d273a

scala>

Just downloaded rapture.core to try out your new allow alternative for new

Got compile problem

not found: value intersectionType macros.scala /rapture-core-master/src/rapture/core line 77

Scala Problem

val intersection = exceptionTypes.filter(_ != weakTypeOf[E2])
val resultType = intersection.length match {
case 0 => typeOf[Nothing]
case 1 => intersection.head
case _ => intersectionType(intersection) //this line gives error above
}

Regards Justin Johansson

Looks strange to me... how are you compiling it? If you're using my working copy in source, you'll need to use Scala 2.10 (not 2.11).

But something else is clearly broken, because when I try and compile it using SBT, I get a different error saying "not found: value implicitly", which makes no sense...

Have I ever mentioned how much I hate build systems?! ;)

Is this another macro?

Yes, it's implemented with a macro.