fix big struct schema rendering

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.18.12
+
+* fix issue where schemas for fields of generated big structs (over 22 fields in size) would not be ordered correctly
+
 # 0.18.11
 
 * smithy4s Structure schemas are now retaining the original order of fields, as per the specification.

modules/bootstrapped/src/generated/smithy4s/example/BigStruct.scala

@@ -5,17 +5,18 @@ import smithy4s.Schema
 import smithy4s.ShapeId
 import smithy4s.ShapeTag
 import smithy4s.schema.Schema.int
+import smithy4s.schema.Schema.string
 import smithy4s.schema.Schema.struct
 
-final case class BigStruct(a1: Int, a2: Int, a3: Int, a4: Int, a5: Int, a6: Int, a7: Int, a8: Int, a9: Int, a10: Int, a11: Int, a12: Int, a13: Int, a14: Int, a15: Int, a16: Int, a17: Int, a18: Int, a19: Int, a20: Int, a21: Int, a22: Int, a23: Int)
+final case class BigStruct(a1: Int, a2: Int, a3: Int, a4: Int, a5: Int, a6: Int, a7: Int, a8: Int, a9: Int, a10: Int, a11: Int, a12: Int, a13: Int, a14: Int, a15: Int, a16: Int, a17: Int, a18: Int, a19: Int, a20: Int, a21: Int, a22: Int, a24: Int, a23: Option[String] = None)
 
 object BigStruct extends ShapeTag.Companion[BigStruct] {
   val id: ShapeId = ShapeId("smithy4s.example", "BigStruct")
 
   val hints: Hints = Hints.empty
 
   // constructor using the original order from the spec
-  private def make(a1: Int, a2: Int, a3: Int, a4: Int, a5: Int, a6: Int, a7: Int, a8: Int, a9: Int, a10: Int, a11: Int, a12: Int, a13: Int, a14: Int, a15: Int, a16: Int, a17: Int, a18: Int, a19: Int, a20: Int, a21: Int, a22: Int, a23: Int): BigStruct = BigStruct(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23)
+  private def make(a1: Int, a2: Int, a3: Int, a4: Int, a5: Int, a6: Int, a7: Int, a8: Int, a9: Int, a10: Int, a11: Int, a12: Int, a13: Int, a14: Int, a15: Int, a16: Int, a17: Int, a18: Int, a19: Int, a20: Int, a21: Int, a22: Int, a23: Option[String], a24: Int): BigStruct = BigStruct(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a24, a23)
 
   implicit val schema: Schema[BigStruct] = struct.genericArity(
     int.required[BigStruct]("a1", _.a1),
@@ -40,7 +41,8 @@ object BigStruct extends ShapeTag.Companion[BigStruct] {
     int.required[BigStruct]("a20", _.a20),
     int.required[BigStruct]("a21", _.a21),
     int.required[BigStruct]("a22", _.a22),
-    int.required[BigStruct]("a23", _.a23),
+    string.optional[BigStruct]("a23", _.a23),
+    int.required[BigStruct]("a24", _.a24),
   ){
     arr => make(
       arr(0).asInstanceOf[Int],
@@ -65,7 +67,8 @@ object BigStruct extends ShapeTag.Companion[BigStruct] {
       arr(19).asInstanceOf[Int],
       arr(20).asInstanceOf[Int],
       arr(21).asInstanceOf[Int],
-      arr(22).asInstanceOf[Int],
+      arr(22).asInstanceOf[Option[String]],
+      arr(23).asInstanceOf[Int],
     )
   }.withId(id).addHints(hints)
 }

modules/bootstrapped/test/src/smithy4s/BigStructSmokeSpec.scala

@@ -25,7 +25,7 @@ class BigStructSmokeSpec() extends FunSuite {
 
   test("Big structures do have a schema") {
     val expected =
-      "structure BigStruct(a1: Int, a2: Int, a3: Int, a4: Int, a5: Int, a6: Int, a7: Int, a8: Int, a9: Int, a10: Int, a11: Int, a12: Int, a13: Int, a14: Int, a15: Int, a16: Int, a17: Int, a18: Int, a19: Int, a20: Int, a21: Int, a22: Int, a23: Int)"
+      "structure BigStruct(a1: Int, a2: Int, a3: Int, a4: Int, a5: Int, a6: Int, a7: Int, a8: Int, a9: Int, a10: Int, a11: Int, a12: Int, a13: Int, a14: Int, a15: Int, a16: Int, a17: Int, a18: Int, a19: Int, a20: Int, a21: Int, a22: Int, a23: Option[String], a24: Int)"
     val schemaRepr =
       smithy4s.example.BigStruct.schema.compile(SchemaDescriptionDetailed)
     expect.same(schemaRepr, expected)

modules/codegen/src/smithy4s/codegen/internals/Renderer.scala

@@ -747,7 +747,7 @@ private[internals] class Renderer(compilationUnit: CompilationUnit) { self =>
               .args(renderedFields)
               .block(
                 line"arr => make".args(
-                  fields.zipWithIndex.map { case (field, idx) =>
+                  fields.sortBy(_.originalIndex).zipWithIndex.map { case (field, idx) =>
                     line"arr($idx).asInstanceOf[${Line.fieldType(field)}]"
                   }
                 )

sampleSpecs/misc.smithy

@@ -53,8 +53,9 @@ structure BigStruct {
     a21: Integer
     @required
     a22: Integer
+    a23: String
     @required
-    a23: Integer
+    a24: Integer
 }
 
 @enum([