Change syntax of splices and quotes

bench/tests/power-macro/PowerMacro.scala

@@ -2,11 +2,11 @@ import scala.quoted.Expr
 
 object PowerMacro {
 
-  inline def power(inline n: Long, x: Double) = ~powerCode(n, '{x})
+  inline def power(inline n: Long, x: Double) = ${powerCode(n, '{x})}
 
   def powerCode(n: Long, x: Expr[Double]): Expr[Double] =
     if (n == 0) '{1.0}
-    else if (n % 2 == 0) '{ val y = ~x * ~x; ~powerCode(n / 2, '{y}) }
-    else '{ ~x * ~powerCode(n - 1, x) }
+    else if (n % 2 == 0) '{ val y = $x * $x; ${powerCode(n / 2, '{y})} }
+    else '{ $x * ${powerCode(n - 1, x)} }
 
 }

compiler/src/dotty/tools/dotc/ast/Desugar.scala

@@ -1319,9 +1319,9 @@ object desugar {
         else
           Apply(ref(defn.QuotedExpr_applyR), t)
       case Splice(expr) =>
-        Select(expr, nme.UNARY_~)
+        Select(expr, nme.splice)
       case TypSplice(expr) =>
-        Select(expr, tpnme.UNARY_~)
+        Select(expr, tpnme.splice)
       case InterpolatedString(id, segments) =>
         val strs = segments map {
           case ts: Thicket => ts.trees.head

compiler/src/dotty/tools/dotc/core/Definitions.scala

@@ -707,16 +707,16 @@ class Definitions {
   def QuotedExprModule(implicit ctx: Context): Symbol = QuotedExprClass.companionModule
     lazy val QuotedExpr_applyR: TermRef = QuotedExprModule.requiredMethodRef(nme.apply)
     def QuotedExpr_apply(implicit ctx: Context): Symbol = QuotedExpr_applyR.symbol
-    lazy val QuotedExpr_~ : TermSymbol = QuotedExprClass.requiredMethod(nme.UNARY_~)
+    lazy val QuotedExpr_splice : TermSymbol = QuotedExprClass.requiredMethod(nme.splice)
 
   lazy val QuotedExprsModule: TermSymbol = ctx.requiredModule("scala.quoted.Exprs")
   def QuotedExprsClass(implicit ctx: Context): ClassSymbol = QuotedExprsModule.asClass
 
   lazy val QuotedTypeType: TypeRef = ctx.requiredClassRef("scala.quoted.Type")
   def QuotedTypeClass(implicit ctx: Context): ClassSymbol = QuotedTypeType.symbol.asClass
 
-    lazy val QuotedType_spliceR: TypeRef = QuotedTypeClass.requiredType(tpnme.UNARY_~).typeRef
-    def QuotedType_~ : Symbol = QuotedType_spliceR.symbol
+    lazy val QuotedType_spliceR: TypeRef = QuotedTypeClass.requiredType(tpnme.splice).typeRef
+    def QuotedType_splice : Symbol = QuotedType_spliceR.symbol
 
   lazy val QuotedTypeModuleType: TermRef = ctx.requiredModuleRef("scala.quoted.Type")
   def QuotedTypeModule(implicit ctx: Context): Symbol = QuotedTypeModuleType.symbol

compiler/src/dotty/tools/dotc/printing/RefinedPrinter.scala

@@ -328,8 +328,8 @@ class RefinedPrinter(_ctx: Context) extends PlainPrinter(_ctx) {
         if (name.isTypeName) typeText(txt)
         else txt
       case tree @ Select(qual, name) =>
-        if (tree.hasType && tree.symbol == defn.QuotedExpr_~) keywordStr("${") ~ toTextLocal(qual) ~ keywordStr("}")
-        else if (tree.hasType && tree.symbol == defn.QuotedType_~) typeText("${") ~ toTextLocal(qual) ~ typeText("}")
+        if (tree.hasType && tree.symbol == defn.QuotedExpr_splice) keywordStr("${") ~ toTextLocal(qual) ~ keywordStr("}")
+        else if (tree.hasType && tree.symbol == defn.QuotedType_splice) typeText("${") ~ toTextLocal(qual) ~ typeText("}")
         else if (qual.isType) toTextLocal(qual) ~ "#" ~ typeText(toText(name))
         else toTextLocal(qual) ~ ("." ~ nameIdText(tree) provided name != nme.CONSTRUCTOR)
       case tree: This =>

compiler/src/dotty/tools/dotc/transform/ReifyQuotes.scala

@@ -129,13 +129,13 @@ class ReifyQuotes extends MacroTransform {
 
       def mkTagSymbolAndAssignType(spliced: TermRef): TypeDef = {
         val splicedTree = tpd.ref(spliced)
-        val rhs = transform(splicedTree.select(tpnme.UNARY_~))
+        val rhs = transform(splicedTree.select(tpnme.splice))
         val alias = ctx.typeAssigner.assignType(untpd.TypeBoundsTree(rhs, rhs), rhs, rhs)
         val local = ctx.newSymbol(
           owner = ctx.owner,
           name = UniqueName.fresh((splicedTree.symbol.name.toString + "$_~").toTermName).toTypeName,
           flags = Synthetic,
-          info = TypeAlias(splicedTree.tpe.select(tpnme.UNARY_~)),
+          info = TypeAlias(splicedTree.tpe.select(tpnme.splice)),
           coord = spliced.termSymbol.coord).asType
 
         ctx.typeAssigner.assignType(untpd.TypeDef(local.name, alias), local)
@@ -353,11 +353,11 @@ class ReifyQuotes extends MacroTransform {
 
           case tree: TypeTree if tree.tpe.typeSymbol.isSplice =>
             val splicedType = tree.tpe.stripTypeVar.asInstanceOf[TypeRef].prefix.termSymbol
-            transformSplice(ref(splicedType).select(tpnme.UNARY_~).withSpan(tree.span))
+            transformSplice(ref(splicedType).select(tpnme.splice).withSpan(tree.span))
 
           case tree: RefTree if isCaptured(tree.symbol, level) =>
             val t = capturers(tree.symbol).apply(tree)
-            transformSplice(t.select(if (tree.isTerm) nme.UNARY_~ else tpnme.UNARY_~))
+            transformSplice(t.select(if (tree.isTerm) nme.splice else tpnme.splice))
 
           case tree: DefDef if tree.symbol.is(Macro) && level == 0 =>
             // Shrink size of the tree. The methods have already been inlined.

compiler/src/dotty/tools/dotc/transform/Staging.scala

@@ -301,7 +301,7 @@ class Staging extends MacroTransform {
                               | The access would be accepted with the right type tag, but
                               | ${ctx.typer.missingArgMsg(tag, reqType, "")}""")
               case _ =>
-                Some(tag.select(tpnme.UNARY_~))
+                Some(tag.select(tpnme.splice))
             }
           }
         case _ =>

compiler/src/dotty/tools/dotc/transform/SymUtils.scala

@@ -162,5 +162,5 @@ class SymUtils(val self: Symbol) extends AnyVal {
 
   /** Is symbol a splice operation? */
   def isSplice(implicit ctx: Context): Boolean =
-    self == defn.QuotedExpr_~ || self == defn.QuotedType_~
+    self == defn.QuotedExpr_splice || self == defn.QuotedType_splice
 }

compiler/src/dotty/tools/dotc/typer/Implicits.scala

@@ -669,7 +669,7 @@ trait Implicits { self: Typer =>
             case t @ TypeRef(NoPrefix, _) =>
               inferImplicit(defn.QuotedTypeType.appliedTo(t), EmptyTree, span) match {
                 case SearchSuccess(tag, _, _) if tag.tpe.isStable =>
-                  tag.tpe.select(defn.QuotedType_~)
+                  tag.tpe.select(defn.QuotedType_splice)
                 case _ =>
                   ok = false
                   t

compiler/test-resources/repl/i5551

@@ -1,9 +1,9 @@
 scala> import scala.quoted._
 
-scala> def assertImpl(expr: Expr[Boolean]) = '{ if !(~expr) then throw new AssertionError("failed assertion")}
+scala> def assertImpl(expr: Expr[Boolean]) = '{ if !($expr) then throw new AssertionError("failed assertion")}
 def assertImpl(expr: quoted.Expr[Boolean]): quoted.Expr[Unit]
 
-scala>   inline def assert(expr: => Boolean): Unit =  ~ assertImpl('{expr})
+scala>   inline def assert(expr: => Boolean): Unit =  ${ assertImpl('{expr}) }
 def assert(expr: => Boolean): Unit
 
 scala> assert(0 == 0)

library/src-bootstrapped/scala/quoted/package.scala

@@ -9,7 +9,7 @@ package object quoted {
   implicit class ListOfExprOps[T](val list: List[Expr[T]]) extends AnyVal {
     def toExprOfList(implicit ev: Type[T]): Expr[List[T]] = {
       def rec(list: List[Expr[T]]): Expr[List[T]] = list match {
-        case x :: xs  => '{ (~x) :: (~rec(xs)) }
+        case x :: xs  => '{ ($x) :: ${rec(xs)} }
         case Nil => '{Nil}
       }
       rec(list)

library/src/scala/quoted/Expr.scala

@@ -3,7 +3,8 @@ package scala.quoted
 import scala.runtime.quoted.Unpickler.Pickled
 
 sealed abstract class Expr[+T] {
-  final def unary_~ : T = throw new Error("~ should have been compiled away")
+
+  final def splice: T = throw new Error("splice should have been compiled away")
 
   /** Evaluate the contents of this expression and return the result.
    *
@@ -13,6 +14,7 @@ sealed abstract class Expr[+T] {
 
   /** Show a source code like representation of this expression */
   final def show(implicit toolbox: Toolbox): String = toolbox.show(this)
+
 }
 
 object Expr {
@@ -146,7 +148,7 @@ object Exprs {
   // TODO Use a List in FunctionAppliedTo(val f: Expr[_], val args: List[Expr[_]])
   // FIXME: Having the List in the code above trigers an assertion error while testing dotty.tools.dotc.reporting.ErrorMessagesTests.i3187
   //        This test does redefine `scala.collection`. Further investigation is needed.
-  /** An Expr representing `'{(~f).apply(~x1, ..., ~xn)}` but it is beta-reduced when the closure is known */
+  /** An Expr representing `'{($f).apply($x1, ..., $xn)}` but it is beta-reduced when the closure is known */
   final class FunctionAppliedTo[+R](val f: Expr[_], val args: Array[Expr[_]]) extends Expr[R] {
     override def toString: String = s"Expr($f <applied to> ${args.toList})"
   }

library/src/scala/quoted/Type.scala

@@ -5,7 +5,7 @@ import scala.reflect.ClassTag
 import scala.runtime.quoted.Unpickler.Pickled
 
 sealed abstract class Type[T] {
-  type unary_~ = T
+  type splice = T
 }
 
 /** Some basic type tags, currently incomplete */

tests/disabled/run/i4803d/App_2.scala

@@ -11,7 +11,7 @@ object Test {
   }
 
   inline def power2(x: Double) = {
-    inline def power(x: Double, inline n: Long) = ~PowerMacro.powerCode('{x}, n)
+    inline def power(x: Double, inline n: Long) = ${ PowerMacro.powerCode('{x}, n) }
     power(x, 2)
   }
 }

tests/disabled/run/i4803d/Macro_1.scala

@@ -3,6 +3,6 @@ import scala.quoted._
 object PowerMacro {
   def powerCode(x: Expr[Double], n: Long): Expr[Double] =
     if (n == 0) '{1.0}
-    else if (n % 2 == 0) '{ val y = $x * $x; ~powerCode('{y}, n / 2) }
-    else '{ $x * ~powerCode(x, n - 1) }
+    else if (n % 2 == 0) '{ val y = $x * $x; ${powerCode('{y}, n / 2)} }
+    else '{ $x * ${powerCode(x, n - 1)} }
 }

tests/neg-with-compiler/quote-run-in-macro-1/quoted_1.scala

@@ -3,7 +3,7 @@ import scala.quoted._
 import scala.quoted.Toolbox.Default._
 
 object Macros {
-  inline def foo(i: => Int): Int = ~fooImpl('{i})
+  inline def foo(i: => Int): Int = ${ fooImpl('{i}) }
   def fooImpl(i: Expr[Int]): Expr[Int] = {
     val y: Int = i.run
     y.toExpr

tests/neg-with-compiler/quote-run-in-macro-2/quoted_1.scala

@@ -3,7 +3,7 @@ import scala.quoted._
 import scala.quoted.Toolbox.Default._
 
 object Macros {
-  inline def foo(i: => Int): Int = ~fooImpl('{i})
+  inline def foo(i: => Int): Int = ${ fooImpl('{i}) }
   def fooImpl(i: Expr[Int]): Expr[Int] = {
     val y: Int = i.run
     y.toExpr

tests/neg/i4044b.scala

@@ -8,8 +8,8 @@ class Test {
 
     '{
       b // error
-      ~(b)
-      ~('{b}) // error
+      ${b}
+      ${ '{b} } // error
       '{ '{$b} } // error
     }
 

tests/neg/i4774b.scala

@@ -4,8 +4,8 @@ import scala.quoted._
 object Test {
   def loop[T](x: Expr[T])(implicit t: Type[T]): Expr[T] = '{
     val y: $t = $x;
-    ~loop[$t]( // error
+    ${loop[$t]( // error
       '{y}
-    )
+    )}
   }
 }

tests/neg/inline-case-objects/Main_2.scala

@@ -6,6 +6,6 @@ object Test {
     println(fooString(bar.Baz)) // error
   }
 
-  inline def fooString(inline x: Any): String = ~Macros.impl(x)
+  inline def fooString(inline x: Any): String = ${ Macros.impl(x) }
 
 }

tests/neg/inline-macro-staged-interpreter/Macro_1.scala

@@ -3,7 +3,7 @@ import scala.quoted._
 
 object E {
 
-  inline def eval[T](inline x: E[T]): T = ~impl(x)
+  inline def eval[T](inline x: E[T]): T = ${ impl(x) }
 
   def impl[T](x: E[T]): Expr[T] = x.lift
 

tests/neg/inline-option/Main_2.scala

@@ -6,10 +6,10 @@ object Main {
   val b: Option[Int] = Some(4)
   size(b) // error
 
-  inline def size(inline opt: Option[Int]): Int = ~Macro.impl(opt)
+  inline def size(inline opt: Option[Int]): Int = ${ Macro.impl(opt) }
 
-  inline def size2(inline i: Int): Int = ~Macro.impl(None)
+  inline def size2(inline i: Int): Int = ${ Macro.impl(None) }
 
-  inline def size3(inline i: Int): Int = ~Macro.impl(Some(i))
+  inline def size3(inline i: Int): Int = ${ Macro.impl(Some(i)) }
 
 }

tests/neg/inline-tuples-1/Main_2.scala

@@ -347,27 +347,27 @@ object Test {
     )))
   }
 
-  inline def sum(inline tup: Tuple1[Int]): Int = ~Macros.tup1(tup)
-  inline def sum(inline tup: Tuple2[Int, Int]): Int = ~Macros.tup2(tup)
-  inline def sum(inline tup: Tuple3[Int, Int, Int]): Int = ~Macros.tup3(tup)
-  inline def sum(inline tup: Tuple4[Int, Int, Int, Int]): Int = ~Macros.tup4(tup)
-  inline def sum(inline tup: Tuple5[Int, Int, Int, Int, Int]): Int = ~Macros.tup5(tup)
-  inline def sum(inline tup: Tuple6[Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup6(tup)
-  inline def sum(inline tup: Tuple7[Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup7(tup)
-  inline def sum(inline tup: Tuple8[Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup8(tup)
-  inline def sum(inline tup: Tuple9[Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup9(tup)
-  inline def sum(inline tup: Tuple10[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup10(tup)
-  inline def sum(inline tup: Tuple11[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup11(tup)
-  inline def sum(inline tup: Tuple12[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup12(tup)
-  inline def sum(inline tup: Tuple13[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup13(tup)
-  inline def sum(inline tup: Tuple14[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup14(tup)
-  inline def sum(inline tup: Tuple15[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup15(tup)
-  inline def sum(inline tup: Tuple16[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup16(tup)
-  inline def sum(inline tup: Tuple17[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup17(tup)
-  inline def sum(inline tup: Tuple18[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup18(tup)
-  inline def sum(inline tup: Tuple19[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup19(tup)
-  inline def sum(inline tup: Tuple20[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup20(tup)
-  inline def sum(inline tup: Tuple21[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup21(tup)
-  inline def sum(inline tup: Tuple22[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ~Macros.tup22(tup)
+  inline def sum(inline tup: Tuple1[Int]): Int = ${ Macros.tup1(tup) }
+  inline def sum(inline tup: Tuple2[Int, Int]): Int = ${ Macros.tup2(tup) }
+  inline def sum(inline tup: Tuple3[Int, Int, Int]): Int = ${ Macros.tup3(tup) }
+  inline def sum(inline tup: Tuple4[Int, Int, Int, Int]): Int = ${ Macros.tup4(tup) }
+  inline def sum(inline tup: Tuple5[Int, Int, Int, Int, Int]): Int = ${ Macros.tup5(tup) }
+  inline def sum(inline tup: Tuple6[Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup6(tup) }
+  inline def sum(inline tup: Tuple7[Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup7(tup) }
+  inline def sum(inline tup: Tuple8[Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup8(tup) }
+  inline def sum(inline tup: Tuple9[Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup9(tup) }
+  inline def sum(inline tup: Tuple10[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup10(tup) }
+  inline def sum(inline tup: Tuple11[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup11(tup) }
+  inline def sum(inline tup: Tuple12[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup12(tup) }
+  inline def sum(inline tup: Tuple13[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup13(tup) }
+  inline def sum(inline tup: Tuple14[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup14(tup) }
+  inline def sum(inline tup: Tuple15[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup15(tup) }
+  inline def sum(inline tup: Tuple16[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup16(tup) }
+  inline def sum(inline tup: Tuple17[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup17(tup) }
+  inline def sum(inline tup: Tuple18[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup18(tup) }
+  inline def sum(inline tup: Tuple19[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup19(tup) }
+  inline def sum(inline tup: Tuple20[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup20(tup) }
+  inline def sum(inline tup: Tuple21[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup21(tup) }
+  inline def sum(inline tup: Tuple22[Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int, Int]): Int = ${ Macros.tup22(tup) }
 
 }

tests/neg/quote-MacroOverride.scala

@@ -6,7 +6,7 @@ object Test {
   }
 
   object B extends A {
-    inline def f() = ~('{})  // error: may not override
+    inline def f() = ${'{}}  // error: may not override
     override def g() = ()    // error: may not override
   }
 

tests/neg/quote-complex-top-splice.scala

@@ -9,15 +9,15 @@ object Test {
     impl(x)
   }
 
-  inline def foo2: Unit = ~impl({ // error
+  inline def foo2: Unit = ${ impl({ // error
     val x = 1
     x
-  })
+  }) }
 
-  inline def foo3: Unit = ~impl({ // error
+  inline def foo3: Unit = ${ impl({ // error
     println("foo3")
     3
-  })
+  }) }
 
   inline def foo4: Unit = ${ // error
     println("foo4")

tests/neg/quote-macro-2-splices.scala

@@ -3,8 +3,8 @@ import scala.quoted._
 object Macro {
 
   inline def foo(b: Boolean): Int = { // error
-    if (b) ~bar(true)
-    else ~bar(false)
+    if (b) ${ bar(true) }
+    else ${ bar(false) }
   }
 
   def bar(b: Boolean): Expr[Int] = if (b) '{1} else '{0}

tests/neg/quote-macro-complex-arg-0.scala

@@ -1,6 +1,6 @@
 import scala.quoted._
 
 object Macros {
-  inline def foo(inline i: Int, dummy: Int, j: Int): Int = ~bar(i + 1, '{j}) // error: i + 1 is not a parameter or field reference
-  def bar(x: Int, y: Expr[Int]): Expr[Int] = '{ ~{x.toExpr} + $y }
+  inline def foo(inline i: Int, dummy: Int, j: Int): Int = ${ bar(i + 1, '{j}) } // error: i + 1 is not a parameter or field reference
+  def bar(x: Int, y: Expr[Int]): Expr[Int] = '{ ${x.toExpr} + $y }
 }

tests/neg/quote-macro-splice.scala

@@ -4,21 +4,21 @@ object Test {
 
   inline def foo1: Int = { // error
     println()
-    ~impl(1.toExpr)
+    ${ impl(1.toExpr) }
   }
 
   inline def foo2: Int = { // error
-    ~impl(1.toExpr)
-    ~impl(2.toExpr)
+    ${ impl(1.toExpr) }
+    ${ impl(2.toExpr) }
   }
 
   inline def foo3: Int = { // error
     val a = 1
-    ~impl('{a})
+    ${ impl('{a}) }
   }
 
   inline def foo4: Int = { // error
-    ~impl('{1})
+    ${ impl('{1}) }
     1
   }
 

tests/neg/quote-pcp-in-arg.scala

@@ -1,6 +1,6 @@
 import scala.quoted._
 
 object Foo {
-  inline def foo(x: Int): Int = ~bar('{ '{x}; x }) // error
+  inline def foo(x: Int): Int = ${ bar('{ '{x}; x }) } // error
   def bar(i: Expr[Int]): Expr[Int] = i
 }