Rust structz (#6539)

* Rust structz

* struct of structs test

* swift tmp variables

Co-authored-by: Casper Neo <cneo@google.com>

tests/my-game/example/struct-of-structs.ts

@@ -0,0 +1,84 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+import { Ability, AbilityT } from '../../my-game/example/ability';
+import { Test, TestT } from '../../my-game/example/test';
+
+
+export class StructOfStructs {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+__init(i:number, bb:flatbuffers.ByteBuffer):StructOfStructs {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+a(obj?:Ability):Ability|null {
+  return (obj || new Ability()).__init(this.bb_pos, this.bb!);
+}
+
+b(obj?:Test):Test|null {
+  return (obj || new Test()).__init(this.bb_pos + 8, this.bb!);
+}
+
+c(obj?:Ability):Ability|null {
+  return (obj || new Ability()).__init(this.bb_pos + 12, this.bb!);
+}
+
+static sizeOf():number {
+  return 20;
+}
+
+static createStructOfStructs(builder:flatbuffers.Builder, a_id: number, a_distance: number, b_a: number, b_b: number, c_id: number, c_distance: number):flatbuffers.Offset {
+  builder.prep(4, 20);
+  builder.prep(4, 8);
+  builder.writeInt32(c_distance);
+  builder.writeInt32(c_id);
+  builder.prep(2, 4);
+  builder.pad(1);
+  builder.writeInt8(b_b);
+  builder.writeInt16(b_a);
+  builder.prep(4, 8);
+  builder.writeInt32(a_distance);
+  builder.writeInt32(a_id);
+  return builder.offset();
+}
+
+
+unpack(): StructOfStructsT {
+  return new StructOfStructsT(
+    (this.a() !== null ? this.a()!.unpack() : null),
+    (this.b() !== null ? this.b()!.unpack() : null),
+    (this.c() !== null ? this.c()!.unpack() : null)
+  );
+}
+
+
+unpackTo(_o: StructOfStructsT): void {
+  _o.a = (this.a() !== null ? this.a()!.unpack() : null);
+  _o.b = (this.b() !== null ? this.b()!.unpack() : null);
+  _o.c = (this.c() !== null ? this.c()!.unpack() : null);
+}
+}
+
+export class StructOfStructsT {
+constructor(
+  public a: AbilityT|null = null,
+  public b: TestT|null = null,
+  public c: AbilityT|null = null
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return StructOfStructs.createStructOfStructs(builder,
+    (this.a === null ? 0 : this.a.id!),
+    (this.a === null ? 0 : this.a.distance!),
+    (this.b === null ? 0 : this.b.a!),
+    (this.b === null ? 0 : this.b.b!),
+    (this.c === null ? 0 : this.c.id!),
+    (this.c === null ? 0 : this.c.distance!)
+  );
+}
+}