Add Iterable subtype bound to FromInput

build.sbt

@@ -1,3 +1,5 @@
+import com.typesafe.tools.mima.core._
+
 val isScala3 = Def.setting(
   CrossVersion.partialVersion(scalaVersion.value).exists(_._1 == 3)
 )
@@ -10,6 +12,17 @@ mimaPreviousArtifacts := {
   else
     Set("org.sangria-graphql" %% "sangria-marshalling-api" % "1.0.5")
 }
+mimaBinaryIssueFilters ++= Seq(
+  ProblemFilters.exclude[IncompatibleMethTypeProblem](
+    "sangria.marshalling.CoercedScalaResultMarshaller.mapAndMarshal"),
+  ProblemFilters.exclude[IncompatibleResultTypeProblem]("sangria.marshalling.FromInput.seqInput"),
+  ProblemFilters.exclude[IncompatibleResultTypeProblem]("sangria.marshalling.FromInput.seqInput"),
+  ProblemFilters.exclude[MissingClassProblem]("sangria.marshalling.FromInput$SeqFromInput"),
+  ProblemFilters.exclude[DirectMissingMethodProblem](
+    "sangria.marshalling.ResultMarshaller.mapAndMarshal"),
+  ProblemFilters.exclude[IncompatibleMethTypeProblem](
+    "sangria.marshalling.ScalaResultMarshaller.mapAndMarshal")
+)
 
 description := "Sangria Marshalling API"
 homepage := Some(url("https://sangria-graphql.github.io/"))

src/main/scala/sangria/marshalling/FromInput.scala

@@ -16,19 +16,21 @@ object FromInput {
     def fromResult(node: marshaller.Node): marshaller.Node = node
   }
 
-  class SeqFromInput[T](delegate: FromInput[T]) extends FromInput[Seq[T]] {
+  class IterableFromInput[T, I[_] <: Iterable[_]](delegate: FromInput[T]) extends FromInput[I[T]] {
     val marshaller: ResultMarshaller = delegate.marshaller
 
-    def fromResult(node: marshaller.Node): Seq[T] =
+    def fromResult(node: marshaller.Node): I[T] =
       node
-        .asInstanceOf[Seq[Any]]
-        .map {
-          case optElem: Option[_] =>
-            optElem.map(elem => delegate.fromResult(elem.asInstanceOf[delegate.marshaller.Node]))
-          case elem =>
-            delegate.fromResult(elem.asInstanceOf[delegate.marshaller.Node])
+        .asInstanceOf[I[Any]]
+        .map { (e: Any) =>
+          e match {
+            case optElem: Option[_] =>
+              optElem.map(elem => delegate.fromResult(elem.asInstanceOf[delegate.marshaller.Node]))
+            case elem =>
+              delegate.fromResult(elem.asInstanceOf[delegate.marshaller.Node])
+          }
         }
-        .asInstanceOf[Seq[T]]
+        .asInstanceOf[I[T]]
   }
 
   import sangria.util.tag._
@@ -43,7 +45,10 @@ object FromInput {
 
   implicit def optionInput[T](implicit ev: FromInput[T]): FromInput[Option[T]] =
     ev.asInstanceOf[FromInput[Option[T]]]
-  implicit def seqInput[T](implicit ev: FromInput[T]): SeqFromInput[T] = new SeqFromInput[T](ev)
+  implicit def seqInput[T](implicit ev: FromInput[T]): IterableFromInput[T, Seq] =
+    new IterableFromInput[T, Seq](ev)
+  implicit def iterableInput[T](implicit ev: FromInput[T]): IterableFromInput[T, Iterable] =
+    new IterableFromInput[T, Iterable](ev)
 
   trait CoercedScalaResult
   trait InputObjectResult

src/main/scala/sangria/marshalling/ResultMarshaller.scala

@@ -46,7 +46,7 @@ trait ResultMarshaller {
   def renderCompact(node: Node): String
   def renderPretty(node: Node): String
 
-  def mapAndMarshal[T](seq: Seq[T], fn: T => Node): Node = {
+  def mapAndMarshal[T](seq: Iterable[T], fn: T => Node): Node = {
     val res = new VectorBuilder[Node]
 
     for (elem <- seq)