Enable optimisations in Runnres.run

Author: nicolasstucki

compiler/src/dotty/tools/dotc/quoted/QuoteDriver.scala

@@ -13,10 +13,9 @@ import java.nio.charset.StandardCharsets
 
 class QuoteDriver extends Driver {
 
-  def run[T](expr: Expr[T]): T = {
+  def run[T](expr: Expr[T], optimise: Boolean): T = {
     val ctx: Context = initCtx.fresh
-    // TODO enable optimisation?
-    // ctx.settings.optimise.update(true)(ctx)
+    ctx.settings.optimise.update(optimise)(ctx)
 
     val outDir = new VirtualDirectory("(memory)", None)
 

compiler/src/dotty/tools/dotc/quoted/Runners.scala

@@ -13,10 +13,7 @@ object Runners {
 
   implicit def runner[T]: Runner[T] = new Runner[T] {
 
-    def run(expr: Expr[T]): T = expr match {
-      case expr: ConstantExpr[T] => expr.value
-      case _ => new QuoteDriver().run(expr)
-    }
+    def run(expr: Expr[T]): T = Runners.run(expr, optimise = false)
 
     def show(expr: Expr[T]): String = expr match {
       case expr: ConstantExpr[T] =>
@@ -27,4 +24,9 @@ object Runners {
       case _ => new QuoteDriver().show(expr)
     }
   }
+
+  def run[T](expr: Expr[T], optimise: Boolean): T = expr match {
+    case expr: ConstantExpr[T] => expr.value
+    case _ => new QuoteDriver().run(expr, optimise)
+  }
 }

tests/run-with-compiler/quote-run-optimise.check

@@ -0,0 +1,9 @@
+{
+  val a: Int = 3
+  println("foo")
+  2.+(a)
+}
+foo
+5
+foo
+5

tests/run-with-compiler/quote-run-optimise.scala

@@ -0,0 +1,17 @@
+
+import dotty.tools.dotc.quoted.Runners._
+
+import scala.quoted._
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    val expr = '{
+      val a = 3
+      println("foo")
+      2 + a
+    }
+    println(expr.show)
+    println(run(expr.run, optimise = true))
+    println(expr.run)
+  }
+}