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Forked from xuwei-k/Macros.scala
Last active December 13, 2015 23:29
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import scala.reflect.macros.Context
import scala.util.matching.Regex
import java.util.regex.PatternSyntaxException
object Macros {
implicit class RegexContext(val c: String) {
def regex(): Regex = macro regexImpl
}
def regexImpl(c: Context)(): c.Expr[Regex] = {
import c.universe._
c.prefix.tree match {
case Apply(Select(_, _), List(Literal(Constant(str: String)))) =>
try{
str.r
}catch{
case e: PatternSyntaxException => c.abort(c.enclosingPosition, e.toString)
}
val Apply(fun, _) = reify(new Regex("")).tree
c.Expr[Regex](Apply.apply(fun, c.literal(str).tree :: Nil))
}
}
}
import Macros._
object Main extends App{
println("foo|bar".regex) // compile success !
println("[foo".regex) // compile error !
println("foo$".regex)
}
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