Add constructors for Select

Author: liufengyun

compiler/src/dotty/tools/dotc/tastyreflect/TreeOpsImpl.scala

@@ -400,6 +400,15 @@ trait TreeOpsImpl extends scala.tasty.reflect.TreeOps with CoreImpl with Helpers
 
 
     object Select extends SelectModule {
+      def unique(qualifier: Term, name: String)(implicit ctx: Context): Select = {
+        val denot = qualifier.tpe.member(name.toTermName)
+        assert(!denot.isOverloaded, s"The symbol `$name` is overloaded. The method Select.unique can only be used for non-overloaded symbols.")
+        tpd.Select(qualifier, name.toTermName)
+      }
+
+      def overloaded(qualifier: Term, name: String, targs: List[Type], args: List[Term])(implicit ctx: Context): Apply =
+        tpd.applyOverloaded(qualifier, name.toTermName, args, targs, Types.WildcardType).asInstanceOf[Apply]
+
       def copy(original: Tree)(qualifier: Term, name: String)(implicit ctx: Context): Select =
         tpd.cpy.Select(original)(qualifier, name.toTermName)
 

library/src/scala/tasty/reflect/TreeOps.scala

@@ -271,8 +271,9 @@ trait TreeOps extends Core {
     /** Scala term selection */
     val Select: SelectModule
     abstract class SelectModule {
+      def unique(qualifier: Term, name: String)(implicit ctx: Context): Select
 
-      // TODO def apply(qualifier: Term, name: String, signature: Option[Signature])(implicit ctx: Context): Select
+      def overloaded(qualifier: Term, name: String, targs: List[Type], args: List[Term])(implicit ctx: Context): Apply
 
       def copy(original: Tree)(qualifier: Term, name: String)(implicit ctx: Context): Select
 

tests/run/reflect-select-constructor/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(Term.Select(lhs, op), rhs :: Nil) =>
+        let(lhs) { left =>
+          let(rhs) { right =>
+            let(Term.Select.overloaded(left, op, Nil, 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.Select(Term.Apply(qual, lhs :: Nil), op), rhs :: Nil), implicits)
+      if isImplicitMethodType(f.tpe) =>
+        let(lhs) { left =>
+          let(rhs) { right =>
+            let(Term.Apply(Term.Select.overloaded(Term.Apply(qual, left :: Nil), op, Nil, 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/reflect-select-constructor/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"))
+  }
+}