Add String interpolation position regression test

tests/neg/tasty-string-interpolator-position-a.check

@@ -0,0 +1,2 @@
+<46..65> in Test_2.scala
+there are no parts

tests/neg/tasty-string-interpolator-position-a/Macro_1.scala

@@ -0,0 +1,21 @@
+import scala.quoted._
+import scala.tasty.Reflection
+import scala.language.implicitConversions
+import scala.quoted.Exprs.LiftedExpr
+import scala.quoted.Toolbox.Default._
+
+object Macro {
+
+  implicit inline def (strCtx: => StringContext) f2 (args: =>Any*): String = ${FIntepolator.apply('strCtx, 'args)}
+
+}
+
+object FIntepolator {
+
+  def apply(strCtxExpr: Expr[StringContext], argsExpr: Expr[Seq[Any]])(implicit reflect: Reflection): Expr[String] = {
+    import reflect._
+    error("there are no parts", strCtxExpr.unseal.underlyingArgument.pos)
+    '{ ($strCtxExpr).s($argsExpr: _*) }
+  }
+
+}

tests/neg/tasty-string-interpolator-position-a/Test_2.scala

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+
+import Macro._
+
+object Test extends App {
+
+  new StringContext().f2() // error
+
+}

tests/neg/tasty-string-interpolator-position-b.check

@@ -0,0 +1,2 @@
+<65..65> in Test_2.scala
+there are no args

tests/neg/tasty-string-interpolator-position-b/Macro_1.scala

@@ -0,0 +1,21 @@
+import scala.quoted._
+import scala.tasty.Reflection
+import scala.language.implicitConversions
+import scala.quoted.Exprs.LiftedExpr
+import scala.quoted.Toolbox.Default._
+
+object Macro {
+
+  implicit inline def (strCtx: => StringContext) f3 (args: =>Any*): String = ${FIntepolator.apply('strCtx, 'args)}
+
+}
+
+object FIntepolator {
+
+  def apply(strCtxExpr: Expr[StringContext], argsExpr: Expr[Seq[Any]])(implicit reflect: Reflection): Expr[String] = {
+    import reflect._
+    error("there are no args", argsExpr.unseal.underlyingArgument.pos)
+    '{ ($strCtxExpr).s($argsExpr: _*) }
+  }
+
+}

tests/neg/tasty-string-interpolator-position-b/Test_2.scala

@@ -0,0 +1,8 @@
+
+import Macro._
+
+object Test extends App {
+
+  new StringContext().f3() // error
+
+}