For meta programming in Scala using the Scalameta library
This tag is for questions relating to the Scalameta library for Scala.
Questions tagged [scalameta]
66 questions
0
votes
1 answer
how to append a implicit params use scala meta annotation?
for a example,append a implicit param id for func method:
Before
def func(p1: String) = { println("hi")}
After
@Param
def func(p1: String)(implicit id: String = "default") = { println("hi")}
Is scala meta able do this?
LoranceChen
- 2,453
- 2
- 22
- 48
0
votes
1 answer
Scalameta inline with maven
I tried to implement scala-meta inline / meta style macro annotation in a scala-maven project. I'm getting following error in the compilation.
[ERROR] /home/tiran/.../validatable.scala:12: ';' expected but 'def' found.
[ERROR] inline def…
tiran
- 2,389
- 1
- 16
- 28
0
votes
2 answers
Scala reflect string to singleton object
I'm looking for a way to convert a Scala singleton object given as a string (for example: package1.Main) to the actual instance of Main, so that I can invoke methods on it.
Example of the problem:
package x {
object Main extends App {
val…
Devabc
- 4,782
- 5
- 27
- 40
0
votes
1 answer
Passing type parameter to scala meta macro/annotations
package scalaworld.macros
import scala.meta._
class Argument(arg: Int) extends scala.annotation.StaticAnnotation {
inline def apply(defn: Any): Any = meta {
println(this.structure)
val arg = this match {
// The argument needs to be…
Bate
- 23
- 8
0
votes
1 answer
How do I use Scala-Meta Parse an object?
I am trying to use Scala Meta to write an annotation so I can generate another case class from an existing object.
But when I try to do this:
MyObject.parse[Source].show[Structure]
I got this error:
Error:(5, 20) not enough arguments for method…
sowen
- 1,090
- 9
- 28
0
votes
2 answers
Macro annotation to override toString of Scala function
How to write macro annotation which looks in usage like @named("+2") _ + 2 and produces:
new (Int => Int) {
override def toString(): String = "+2"
def apply(x: Int): Int = x + 2
}
Andriy Plokhotnyuk
- 7,883
- 2
- 44
- 68