With Scala2 I could implement a macro and generate types using tq quasiquote syntax, for eg: q""" new Foo { type Bar = ${tq"(..$params)"} } """ I am able ...

I have an ostensibly simple macro problem that I’ve been banging my head against for a few hours, with no luck. Perhaps someone with more experience can help. I have the following macro: import s...

I have a custom class, A, and I have defined some operations within the class as follows: def +(that: A) = ... def -(that: A) = ... def *(that: A) = ... def +(that: Double) = ... def -(that: Doub...

I'm trying to call a Shapeless macro from inside a quasiquote with Scala and I'm not getting what I would like to get. My macro doesn't return any errors but it doesn't expand Witness(fieldName) ...

Trying quasiquotes for the first time to generically produce new case classes: val universe: scala.reflect.runtime.universe.type = scala.reflect.runtime.universe import universe._ import scala.ref...

I was playing with Scala 2.11's new macro features. I wanted to see if I could do the following rewrite: forRange(0 to 10) { i => println(i) } // into val iter = (0 to 10).iterator while (ite...

I'm new to scala macros and I spent a couple of days trying to write my very first one. I have a problem with quasiquotes concatenation. There is a list of case clauses, let's say the following: ...

I want to transform Scala XML literals with a macro. (Not a string literal with XML but actual XML literals). As far as I understand, XML literals are not actually built into the language on the AS...

I'm trying to answer this question. Instead of writing: case class Person(name: String, age: Int) { def this() = this("",1) } I thought I'd use macro annotations to expand it from: @Annotatio...

This question is similar in motivation to my previous question (although it's about a problem I ran into in a different context). I can pattern match on a function literal pretty easily without qu...

Quasiquotes are amazing—they make writing macros in Scala hugely less painful, and in my experience they almost always just work exactly as I'd expect. And best of all, they're now available as a p...