Add quotes test for some erased parameters APIs

Author: natsukagami

library/src/scala/quoted/Quotes.scala

@@ -2374,7 +2374,7 @@ trait Quotes { self: runtime.QuoteUnpickler & runtime.QuoteMatching =>
         /** Is this a given parameter clause `(using X1, ..., Xn)` or `(using x1: X1, ..., xn: Xn)` */
         def isGiven: Boolean
         /** Is this a erased parameter clause `(erased x1: X1, ..., xn: Xn)` */
-        // TODO:deprecate in 3.4 and stabilize `erasedParams` and `hasErasedParams`.
+        // TODO:deprecate in 3.4 and stabilize `erasedArgs` and `hasErasedArgs`.
         // @deprecated("Use `hasErasedArgs`","3.4")
         def isErased: Boolean
 

tests/run-custom-args/erased/quotes-reflection.check

@@ -0,0 +1,10 @@
+method <init>: () isGiven=false isImplicit=false erasedArgs=List()
+method m1: (i: scala.Int) isGiven=true isImplicit=false erasedArgs=List(false)
+method m2: (i: scala.Int) isGiven=false isImplicit=false erasedArgs=List(true)
+method m3: (i: scala.Int, j: scala.Int) isGiven=false isImplicit=false erasedArgs=List(false, true)
+method m4: (i: EC) isGiven=false isImplicit=false erasedArgs=List(true)
+val l1: scala.ContextFunction1[scala.Int, scala.Int]
+val l2: scala.compiletime.ErasedFunction with apply: (x$0: scala.Int @scala.annotation.internal.ErasedParam) isImplicit=false erasedParams=List(true)
+val l3: scala.compiletime.ErasedFunction with apply: (x$0: scala.Int @scala.annotation.internal.ErasedParam) isImplicit=true erasedParams=List(true)
+val l4: scala.compiletime.ErasedFunction with apply: (x$0: scala.Int, x$1: scala.Int @scala.annotation.internal.ErasedParam) isImplicit=false erasedParams=List(false, true)
+val l5: scala.compiletime.ErasedFunction with apply: (x$0: EC @scala.annotation.internal.ErasedParam) isImplicit=false erasedParams=List(true)

tests/run-custom-args/erased/quotes-reflection/Macros_1.scala

@@ -0,0 +1,35 @@
+import scala.quoted.*
+
+inline def inspect[A]: String =
+  ${ inspect2[A] }
+
+def inspect2[A: Type](using Quotes): Expr[String] = {
+  import quotes.reflect.*
+
+  val methods = TypeRepr.of[A].typeSymbol.declarations
+  val names = methods.map { m =>
+    m.tree match
+      case dd @ DefDef(name, params, r, body) =>
+        val paramStr =
+          params.map {
+            case ps: TermParamClause =>
+              val params = ps.params.map(p => s"${p.name}: ${p.tpt.show}").mkString("(", ", ", ")")
+              s"$params isGiven=${ps.isGiven} isImplicit=${ps.isImplicit} erasedArgs=${ps.erasedArgs}"
+            case ps: TypeParamClause => ps.params.map(_.show).mkString("[", ", ", "]")
+          }.mkString("")
+        s"method $name: $paramStr"
+      case vd @ ValDef(name, tpt, body) =>
+        tpt.tpe match
+          case Refinement(parent, "apply", tpe: MethodType) if parent == defn.ErasedFunctionClass.typeRef =>
+            assert(tpt.tpe.isErasedFunctionType)
+
+            val params = tpe.paramNames.zip(tpe.paramTypes).map((n, t) => s"$n: ${t.show}").mkString("(", ", ", ")")
+            s"val $name: ${parent.show} with apply: ${params} isImplicit=${tpe.isImplicit} erasedParams=${tpe.erasedParams}"
+          case _ =>
+            s"val $name: ${tpt.show}"
+      case td @ TypeDef(name, tpt) => s"type $name: ${tpt.show}"
+      case _ => s"something else: $m"
+  }
+
+  Expr(names.mkString("\n"))
+}

tests/run-custom-args/erased/quotes-reflection/Test_2.scala

@@ -0,0 +1,20 @@
+import scala.language.experimental.erasedDefinitions
+
+erased class EC
+
+trait X {
+  def m1(using i: Int): Int
+  def m2(erased i: Int): Int
+  def m3(i: Int, erased j: Int): Int
+  def m4(i: EC): Int
+
+  val l1 = (x: Int) ?=> 5
+  val l2 = (erased x: Int) => 5
+  val l3 = (erased x: Int) ?=> 5
+  val l4 = (x: Int, erased y: Int) => 5
+  val l5 = (x: EC) => 5
+}
+
+@main def Test = {
+  println(inspect[X])
+}