Merge pull request #5788 from dotty-staging/test-reflect

Add a more complex macro to test more APIs

Author: nicolasstucki

tests/run-with-compiler/reflect-select-copy/assert_1.scala

@@ -0,0 +1,45 @@
+import scala.quoted._
+import scala.tasty._
+
+object scalatest {
+
+  inline def assert(condition: => Boolean): Unit = ~assertImpl('(condition), '(""))
+
+  def assertImpl(cond: Expr[Boolean], clue: Expr[Any])(implicit refl: Reflection): Expr[Unit] = {
+    import refl._
+    import util._
+    import quoted.Toolbox.Default._
+
+    def isImplicitMethodType(tp: Type): Boolean =
+      Type.IsMethodType.unapply(tp).flatMap(tp => if tp.isImplicit then Some(true) else None).nonEmpty
+
+    cond.unseal.underlyingArgument match {
+      case Term.Apply(sel @ Term.Select(lhs, op), rhs :: Nil) =>
+        let(lhs) { left =>
+          let(rhs) { right =>
+            let(Term.Apply(Term.Select.copy(sel)(left, op), right :: Nil)) { result =>
+              val l = left.seal[Any]
+              val r = right.seal[Any]
+              val b = result.seal[Boolean]
+              val code = '{ scala.Predef.assert(~b) }
+              code.unseal
+            }
+          }
+        }.seal[Unit]
+      case Term.Apply(f @ Term.Apply(Term.IsSelect(sel @ Term.Select(Term.Apply(qual, lhs :: Nil), op)), rhs :: Nil), implicits)
+      if isImplicitMethodType(f.tpe) =>
+        let(lhs) { left =>
+          let(rhs) { right =>
+            let(Term.Apply(Term.Apply(Term.Select.copy(sel)(Term.Apply(qual, left :: Nil), op), right :: Nil), implicits)) { result =>
+              val l = left.seal[Any]
+              val r = right.seal[Any]
+              val b = result.seal[Boolean]
+              val code = '{ scala.Predef.assert(~b) }
+              code.unseal
+            }
+          }
+        }.seal[Unit]
+    }
+  }
+
+}

tests/run-with-compiler/reflect-select-copy/test_2.scala

@@ -0,0 +1,29 @@
+object Test {
+  import scalatest._
+
+  case class Box[T](v: T) {
+    def >(that: Box[T]): Boolean = this == that
+  }
+
+  trait EqInt
+  implicit val eq: EqInt = new EqInt {}
+
+  implicit class AnyOps[T](x: T) {
+    def === (y: T)(implicit c: EqInt) = x == y
+  }
+
+  def main(args: Array[String]): Unit = {
+    val a = Box(Some(10))
+    val five: Float = 5.0f
+    val six: Double = 6.0
+    val ten: Int = 10
+    assert(a.v === Some(10))
+    assert(five < six)
+    assert(five > 4)
+    assert(ten > 5)
+    assert(six < 7)
+    assert(six > 5L)
+    assert(Box(6) > Box(6))
+    assert(Box("h") > Box("h"))
+  }
+}