Squashed 'third_party/flatbuffers/' changes from e5f331db9..bc44fad35

bc44fad35 UnPackTo disable merge by default (#7527)
4fca4dc60 [TS/JS] Move TS tests to dedicated folder and deps upgrade (#7508)
036032373 Bump junit from 4.13 to 4.13.1 in /java (#7526)
89dfb43f3 Replace `bash JavaTest.sh` with `mvn test` (#7500)
c49aff4b6 enabled cpp17 tests in CI (#7524)
56e60223c prevent force_align attribute on enums (#7523)
89b1f5aa1 remove travis config (#7522)
b90159823 [Java][Flexbuffers] Add API to add nullables into the buffer. (#7521)
8cdc6a288 Install BuildFlatBuffers.cmake (#7519)
a67e35aff Moves all of the swift test code into tests/swift (#7509)
f124e41ae Updated Readme
4c954181c [Java][FlexBuffers] throwing exception for untyped fixed vectors (#7507)
7f7547737 [Android] Remove maven dependency of flatbuffers and use source folder (#7503)
a79d61ea8 Fixes issue with cocoapods failing to be published because of docc (#7505)
d465b39c3 [CMake]: fix breaking find_package change (#7499) (#7502)
c5a609dc2 [C#] Prepares for official Nuget release (#7496)
5634dc3d0 [ISSUE-6268] returns NaN insteadof nan (#7498)
37e37b8ca Updates cocoapods version (#7497)
8fd4534fb update android multidex setting (#7495)
d5427da52 Disable Android Build (#7494)
06c5c7ed0 FlatBuffers Version 2.0.8 (#7492)
b190ce11b Verifier Refinements (#7490)
bf5d23230 Namer applied to Typescript generator (#7488)
ce382d6dd [TS/JS] Add rollup and config to generate iife flatbuffers bundle (#7449)
41d9add7e C++: Add option to skip verifying nested flatbuffers (#7489)
6a8742754 [C++] support native_inline attribute for vector of tables (#7479)
694add668 Refactor test.cpp (#7487)
7edf8c908 Update scorecard to 1.1.2
b86387442 Fix typos (#7483)
e2eb5ee67 Include <array> head in stl_emulation.h (#7480)
994502b6d Version number in file package.json updated to 2.0.7 (#7476)
fa41e8367 [C++] Fixed crash when copying table with empty shared strings (#7477)
799cc8f7b Use type traits for specialization (#7475)
b7eb44147 Disable RTTI and rework use in idl_gen_ts.cpp (#7474)
8d01c5859 CMake project version detection made more robust (#7473)
237e8b71f Moved compiler warnings around (#7471)
eeb8fd60d Include builder.addOffset for vector of structs (#7470)
fef2ffc4d Use schema include name for keep-prefix (#7469)
8367664f1 Flatbuffers Version 2.0.7 (#7462)
d6f06c33f Reworked keep prefix (#7456)
627e8bf36 update grpc version (#7457)
883c42b7d disabling unpackto optimization (#7459)
7aae0af30 Remove old GRPC bash script and convert to python3 (#7454)
b057aa917 Grouped anonymous namespaces together, (#7455)
f1b26ff7f Change to GetTypeName (#7453)
9610a666b Generate SLSA signatures for Released zip files (#7450)
1e0f75a64 [WIP] speedup (#7452)
82b75407a Wrap types in namespace for --ts-flat-files and --gen-all (#7451)
f7c511957 Audit and fixups for GCC and Clang (#7212)
a66de58af Partial support for --ts-flat-files and --gen-all (#7446)
a3508f36d [Kotlin] Make sure namespace path exist for code generation (#7357)
137fec716 Stop using __has_trivial_copy on recent clang versions. (#7443)
214125e41 [C#] Rework how sorted vectors are looked up (#7441)
44a7dc999 Define minimum buffer size (#7440)
3cc2daa78 make_span overloads for pointer to vector (#7374) (#7435)
fa1174aa7 [TypeScript] Fix namespaceless schema generation (#7432)
83d4e2a10 Add checks to verifier (#7438)
8a09f3fb0 Fix FlexBuffers JS/TS bug https://github.com/google/flatbuffers/issues/6934 (#7434)
9dbe819ef Add flatc python tests to CI (#7437)
67c414958 Update TypeScriptTest.py to work better cross platform (#7436)
8b8c7dbdf Update gitingore to reflect name change (#7431)
2ee20a5f3 Remove auto including locale functions (#7430)
4be605604 [C++] Set StructDef::has_key property when deserializing from binary schema (#7386) (#7428)
fc5d86f1e [C++] Make template parameter in stl_emulation.h more explicit to avoid conflicts with cpprestsdk U macro (#7424)
9dce287ad Issue#6959 :Updated Automatically generated rust files. (#7425)
7798be3bb avoid zero-as-null-pointer warning (#7423)
966362e07 [C++] Vector of Tables equality (#7415)
a89c279ed [golang] Perform keyword escaping after case conversion (#7421)
a212b3c03 Turn of fail fast for C++ CI
9230f600d Remove stringop-overflow from error (#7422)
c79362156 [golang] Add support for text parsing with json struct tags (#7353)
ee2ced236 Moved TypeScriptTests to python script (#7411)
468c00a3f Rebased: grpc/compiler: Respect filename suffix and extension during code generation (#7414)
47c757f71 Add tests for flatc (#7405)
9a5ff8900 Add FLATBUFFERS_STRICT_MODE (#7408)
950444a34 [TS] Use TextEncoder and TextDecoder (#7400)
30d76198c Compilation issue msys2 #7399 (#7409)
cce3a66f0 Delete .travis directory
8d1cc6ac7 Revert "Compilation issue msys2 (#7403)" (#7407)
5b207639a Update readme.md
359e0f9d6 Revert "grpc/compiler: Respect filename suffix and extension during code generation (#7343)" (#7406)
ebbed0513 Delete cpp-linter.yml
aa395e5a5 (#7323) Rename CMake files according to project name (#7378)
32328075d Fix error msg format when generate GRPC failed (#7350)
97e89c5ac grpc/compiler: Respect filename suffix and extension during code generation (#7343)
5f6672be4 Fix Clang-Cl compile on Windows (#7308)
28e858c85 [TS/Bazel] Minor improvements to typescript.bzl (#7300)
987bebe67 [TS] fix incorrect reverse when writting array of structs (#7271)
ec0129369 Fix FlexBuffers Verifier tracking vectors reuse at wrong offset
50dd385b3 Add missing const (#7401)
da702cfd8 Compilation issue msys2 (#7403)
6e2791640 keep-prefix keeps relative pathing (#7394)
52fce5e53 fix(#7360): grpc used deprecated functions (#7361)
b7f13cd8e cpp_generator: comment out unused parameter to avoid warnings (#7381)
e42985e5a Updated Newtonsoft.Json to 13.0.1 (#7393)
0a8064637 Fix references to LICENSE file (#7377)
b9eea76a8 [Dart] Implement putBool to fix errors when serializing structs with bools (#7359)
1b9030015 Bump Newtonsoft.Json from 12.0.3 to 13.0.1 in /tests/FlatBuffers.Test (#7363)
83a43fc79 Reenable optional json (#7352)
5f0137602 Only include direct included filed (#7348)
9a1913a87 Revert "Implement optional scalars for JSON (#7322)" (#7351)
b4647beb8 Revert "Move reflection_ts_fbs into a separate directory (#7342)" (#7349)
d6060977a Remove asserting in verifier for flattests
987aa5b5e move -Wextra-semi to GCC 8.0+
42acdb63c [TS] Don't generate self-imports with --ts-flat-file (#7340)
0cc1aeb8c [golang] Create missing namespace directory structure (#7324) (#7325)
ba6c67170 [Kotlin] Remove download benchmark files dependency (#7314)
d2f33fc45 Disable Android on Linux CI build
0d1b72cbc [TS] fix ts import path issue (#7298)
9fce2fbf2 replace io/ioutil to os (#7281)
a18ea40d6 Implement optional scalars for JSON (#7322)
090caa280 Move reflection_ts_fbs into a separate directory (#7342)
49e1ea333 Implement optional scalars for Python (#7318)
11a198870 Started implementation for private flags in rust (#7269)
967df08b1 Adds full supposed for Wasm in the swift lib (#7328)
9aa08a429 Use keep case for Rust union discriminant type. (#7321)
9e8c758f5 Add explicit return types to lobster generated code (#7312)
74a25536b Add size check to fix out of bounds read risk (#7304)
12917af8a Update Rust docs page (#7296)
1ea2472f7 [swift] add had<ArrayName> property for arrays to check presence in a message (#7280)
0fe13cb28 Remove span ConstIterator/cbegin()/cend(). (#7295)
385dddc66 Namerkot (#7245)
750dde766 Make `flatc` generate Rust files not requiring `std` (#7273)
9917a168c [swift] Make swift module public (#7274)
76d3cca19 Rust: fix a name conflict when building with "no_std" feature (#7268)
c86e6d0e3 json inf parsing
d34dc32c2 fix include order
234d86c92 fixed off-by-one in parser
746c73b91 Add Annotations for Monster schema and example buffer
0bbfd4b2e fixes for annotator
716521953 Update readme.md (#7257)
a45f564cf [performance] Add aggressive systematic inlining in ByteBuffer and FlatBufferBuilder (#7253)
9d45a6403 more google merge fixes
ccfb4c20b Handle +/-inf in protos (#7256)
7bcd857b8 Specialize CreateVector with std::initializer_list (#7254)
23c8ab34c Swift update performance benchmark infrastructure (#7255)
70002dc5c various fixes for google merge
6e0e79f24 Add test for nested buffer verifier (#7252)
b856368d7 Turn off go modules temporary until we get a proper fix (#7251)
e37156a30 Keep the underlying storage capacity when clearing the FlatBufferBuilder. Gives a significant performance boost for serialisation of many small messages. (#7250)
a10b0e546 Java namer variable keep case (#7249)
275b73994 allow overriding FLATBUFFERS_MAX_ALIGNMENT
9d1ce9a10 Add parameter back to EndVector (#7246)
79afe6c3d Make Java namespaces keep case by default (#7243)
c6dbb2230 Add write permissions for labeller
18bacd3ea Expand test to make sure {}-initializers are properly understood by template. (#7242)
a2c913aec Add -Wnon-virtual-dtor
67b33b294 set workflows permissions to read-only (#7239)
7b5fd2bd0 [Kotlin] Fix key lookup returning null clashing with default value (#7237)
7181d7770 [Java] Fix key lookup returning null clashing with default value (#7236)
7f663b120 Allow CreateVectorOfStrings() to work with any string-type. (#7238)
173ebb694 Fixes a bug where the create function doesnt optional + required items (#7228)
d65823948 [Kotlin] Update gradle to 7.4.1 and simplify config files. (#7231)
ab4bf59e8 remove toascii (#7234)
eee44bbb2 disable cpp-linter (#7229)
a63fa51a1 Create cpp-linter.yml (#7208)
2049e5210 Adds a way to verify/exposes Entities ids (#7221)
832c618f5 Adds implementation flag for swift (#7202)
14615699f Started to migrate to target_compile_options (#7222)
20aad0c41 [C++] stl_emulation span::count_ is not const anymore (#7226) (#7227)
f083b33f2 code gen flexbuffer verifier (#7207)
bf17df346 [C++] generate sorted #include directives (#7213)
35281dedb Fix for [C++] flatc generates invalid Code in the default constructor for structs, when --cpp-field-case-style is used #7209 (#7211)
c9651b742 Add overloads for C# ByteBuffer/FlatBufferBuilder to allow adding vector blocks from ArraySegments or IntPtr (#7193)
26c3b3ada Update codeql.yml
da6e1b985 Update codeql.yml
ad27d751e Added Oss fuzz badge
0aab623cb Create codeql.yml
6a446bdd8 maximize parallel builds in CI (#7206)
21fb5cbbc Create scorecards.yml
0da6f9486 [C++] Static assert on Flatbuffers Version (#7203)
59e971308 reduce fuzzing time to 1 minute in CI
40866a892 fixed padding in struct for annotated binary (#7199)
b71d968fa Apply Namer prefix/suffix to other generators (#7197)
fac0d7be0 Apply Namer to Java. (#7194)
6c5603fd9 [C#] Fix collision of field name and type name (#7149)
2d21853a7 monster fuzzer fix for json default scalars
fec1a8d01 [swift] Add bazel configuration for Swift (#7195)
7fd857623 structured comments (#7192)
a4cb1599d Namerdart (#7187)
ae4ce7265 fuzzed binary annotator (#7188)
e2be0c0b0 Handle root offset and root table vtable invalidation (#7177)
2ad408697 [TS] Fix generation of struct members in object api (#7148)
4213d9105 VerifySizePrefixed (reflection::Schema) and GetAnySizePrefixedRoot added (#7181)
5a13f622c Correctly parse lists of enums in Dart generated code (#7157)
23a7e4e0b Adds no-includes flags to the swift code generator (#7182)
eeb49c275 Move flatbuffer_ts_library to typescript.bzl (#7183)
824763b31 Typo in flatc options (warning-as-errors instead of warnings-as-errors) (#7180)
d3aeee32b Annotated Flatbuffer Binary (#7174)
0bceba24d [Lua] Apply Namer to Lua (#7171)
b8c77d404 Make inclusion of header <optional> opt-out via macro (#7168)
8468eab83 Namersw (#7167)
2b2e8d4ae Nameroverloads (#7164)
b80b32bfa Use DESCRIPTION only if CMake version >= 3.9 (#7166)

Change-Id: Ic2681dabb1a798b7515e62753ee06aecb9933260
git-subtree-dir: third_party/flatbuffers
git-subtree-split: bc44fad35271e43fd7a79b4d691ac9e41708797f
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/tests/ts/union_vector/attacker.js b/tests/ts/union_vector/attacker.js
new file mode 100644
index 0000000..32be94e
--- /dev/null
+++ b/tests/ts/union_vector/attacker.js
@@ -0,0 +1,64 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+import * as flatbuffers from 'flatbuffers';
+export class Attacker {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    static getRootAsAttacker(bb, obj) {
+        return (obj || new Attacker()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    static getSizePrefixedRootAsAttacker(bb, obj) {
+        bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+        return (obj || new Attacker()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    swordAttackDamage() {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        return offset ? this.bb.readInt32(this.bb_pos + offset) : 0;
+    }
+    mutate_sword_attack_damage(value) {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        if (offset === 0) {
+            return false;
+        }
+        this.bb.writeInt32(this.bb_pos + offset, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'Attacker';
+    }
+    static startAttacker(builder) {
+        builder.startObject(1);
+    }
+    static addSwordAttackDamage(builder, swordAttackDamage) {
+        builder.addFieldInt32(0, swordAttackDamage, 0);
+    }
+    static endAttacker(builder) {
+        const offset = builder.endObject();
+        return offset;
+    }
+    static createAttacker(builder, swordAttackDamage) {
+        Attacker.startAttacker(builder);
+        Attacker.addSwordAttackDamage(builder, swordAttackDamage);
+        return Attacker.endAttacker(builder);
+    }
+    unpack() {
+        return new AttackerT(this.swordAttackDamage());
+    }
+    unpackTo(_o) {
+        _o.swordAttackDamage = this.swordAttackDamage();
+    }
+}
+export class AttackerT {
+    constructor(swordAttackDamage = 0) {
+        this.swordAttackDamage = swordAttackDamage;
+    }
+    pack(builder) {
+        return Attacker.createAttacker(builder, this.swordAttackDamage);
+    }
+}
diff --git a/tests/ts/union_vector/attacker.ts b/tests/ts/union_vector/attacker.ts
new file mode 100644
index 0000000..6b3fc0f
--- /dev/null
+++ b/tests/ts/union_vector/attacker.ts
@@ -0,0 +1,87 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class Attacker {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):Attacker {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsAttacker(bb:flatbuffers.ByteBuffer, obj?:Attacker):Attacker {
+  return (obj || new Attacker()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsAttacker(bb:flatbuffers.ByteBuffer, obj?:Attacker):Attacker {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new Attacker()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+swordAttackDamage():number {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
+}
+
+mutate_sword_attack_damage(value:number):boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeInt32(this.bb_pos + offset, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'Attacker';
+}
+
+static startAttacker(builder:flatbuffers.Builder) {
+  builder.startObject(1);
+}
+
+static addSwordAttackDamage(builder:flatbuffers.Builder, swordAttackDamage:number) {
+  builder.addFieldInt32(0, swordAttackDamage, 0);
+}
+
+static endAttacker(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createAttacker(builder:flatbuffers.Builder, swordAttackDamage:number):flatbuffers.Offset {
+  Attacker.startAttacker(builder);
+  Attacker.addSwordAttackDamage(builder, swordAttackDamage);
+  return Attacker.endAttacker(builder);
+}
+
+unpack(): AttackerT {
+  return new AttackerT(
+    this.swordAttackDamage()
+  );
+}
+
+
+unpackTo(_o: AttackerT): void {
+  _o.swordAttackDamage = this.swordAttackDamage();
+}
+}
+
+export class AttackerT {
+constructor(
+  public swordAttackDamage: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return Attacker.createAttacker(builder,
+    this.swordAttackDamage
+  );
+}
+}
diff --git a/tests/ts/union_vector/book-reader.js b/tests/ts/union_vector/book-reader.js
new file mode 100644
index 0000000..0d9e1a5
--- /dev/null
+++ b/tests/ts/union_vector/book-reader.js
@@ -0,0 +1,44 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export class BookReader {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    booksRead() {
+        return this.bb.readInt32(this.bb_pos);
+    }
+    mutate_books_read(value) {
+        this.bb.writeInt32(this.bb_pos + 0, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'BookReader';
+    }
+    static sizeOf() {
+        return 4;
+    }
+    static createBookReader(builder, books_read) {
+        builder.prep(4, 4);
+        builder.writeInt32(books_read);
+        return builder.offset();
+    }
+    unpack() {
+        return new BookReaderT(this.booksRead());
+    }
+    unpackTo(_o) {
+        _o.booksRead = this.booksRead();
+    }
+}
+export class BookReaderT {
+    constructor(booksRead = 0) {
+        this.booksRead = booksRead;
+    }
+    pack(builder) {
+        return BookReader.createBookReader(builder, this.booksRead);
+    }
+}
diff --git a/tests/ts/union_vector/book-reader.ts b/tests/ts/union_vector/book-reader.ts
new file mode 100644
index 0000000..7a31278
--- /dev/null
+++ b/tests/ts/union_vector/book-reader.ts
@@ -0,0 +1,63 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class BookReader {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):BookReader {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+booksRead():number {
+  return this.bb!.readInt32(this.bb_pos);
+}
+
+mutate_books_read(value:number):boolean {
+  this.bb!.writeInt32(this.bb_pos + 0, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'BookReader';
+}
+
+static sizeOf():number {
+  return 4;
+}
+
+static createBookReader(builder:flatbuffers.Builder, books_read: number):flatbuffers.Offset {
+  builder.prep(4, 4);
+  builder.writeInt32(books_read);
+  return builder.offset();
+}
+
+
+unpack(): BookReaderT {
+  return new BookReaderT(
+    this.booksRead()
+  );
+}
+
+
+unpackTo(_o: BookReaderT): void {
+  _o.booksRead = this.booksRead();
+}
+}
+
+export class BookReaderT {
+constructor(
+  public booksRead: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return BookReader.createBookReader(builder,
+    this.booksRead
+  );
+}
+}
diff --git a/tests/ts/union_vector/character.js b/tests/ts/union_vector/character.js
new file mode 100644
index 0000000..04e3294
--- /dev/null
+++ b/tests/ts/union_vector/character.js
@@ -0,0 +1,38 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+import { Attacker } from './attacker.js';
+import { BookReader } from './book-reader.js';
+import { Rapunzel } from './rapunzel.js';
+export var Character;
+(function (Character) {
+    Character[Character["NONE"] = 0] = "NONE";
+    Character[Character["MuLan"] = 1] = "MuLan";
+    Character[Character["Rapunzel"] = 2] = "Rapunzel";
+    Character[Character["Belle"] = 3] = "Belle";
+    Character[Character["BookFan"] = 4] = "BookFan";
+    Character[Character["Other"] = 5] = "Other";
+    Character[Character["Unused"] = 6] = "Unused";
+})(Character || (Character = {}));
+export function unionToCharacter(type, accessor) {
+    switch (Character[type]) {
+        case 'NONE': return null;
+        case 'MuLan': return accessor(new Attacker());
+        case 'Rapunzel': return accessor(new Rapunzel());
+        case 'Belle': return accessor(new BookReader());
+        case 'BookFan': return accessor(new BookReader());
+        case 'Other': return accessor('');
+        case 'Unused': return accessor('');
+        default: return null;
+    }
+}
+export function unionListToCharacter(type, accessor, index) {
+    switch (Character[type]) {
+        case 'NONE': return null;
+        case 'MuLan': return accessor(index, new Attacker());
+        case 'Rapunzel': return accessor(index, new Rapunzel());
+        case 'Belle': return accessor(index, new BookReader());
+        case 'BookFan': return accessor(index, new BookReader());
+        case 'Other': return accessor(index, '');
+        case 'Unused': return accessor(index, '');
+        default: return null;
+    }
+}
diff --git a/tests/ts/union_vector/character.ts b/tests/ts/union_vector/character.ts
new file mode 100644
index 0000000..ddad875
--- /dev/null
+++ b/tests/ts/union_vector/character.ts
@@ -0,0 +1,49 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import { Attacker, AttackerT } from './attacker.js';
+import { BookReader, BookReaderT } from './book-reader.js';
+import { Rapunzel, RapunzelT } from './rapunzel.js';
+
+
+export enum Character {
+  NONE = 0,
+  MuLan = 1,
+  Rapunzel = 2,
+  Belle = 3,
+  BookFan = 4,
+  Other = 5,
+  Unused = 6
+}
+
+export function unionToCharacter(
+  type: Character,
+  accessor: (obj:Attacker|BookReader|Rapunzel|string) => Attacker|BookReader|Rapunzel|string|null
+): Attacker|BookReader|Rapunzel|string|null {
+  switch(Character[type]) {
+    case 'NONE': return null; 
+    case 'MuLan': return accessor(new Attacker())! as Attacker;
+    case 'Rapunzel': return accessor(new Rapunzel())! as Rapunzel;
+    case 'Belle': return accessor(new BookReader())! as BookReader;
+    case 'BookFan': return accessor(new BookReader())! as BookReader;
+    case 'Other': return accessor('') as string;
+    case 'Unused': return accessor('') as string;
+    default: return null;
+  }
+}
+
+export function unionListToCharacter(
+  type: Character, 
+  accessor: (index: number, obj:Attacker|BookReader|Rapunzel|string) => Attacker|BookReader|Rapunzel|string|null, 
+  index: number
+): Attacker|BookReader|Rapunzel|string|null {
+  switch(Character[type]) {
+    case 'NONE': return null; 
+    case 'MuLan': return accessor(index, new Attacker())! as Attacker;
+    case 'Rapunzel': return accessor(index, new Rapunzel())! as Rapunzel;
+    case 'Belle': return accessor(index, new BookReader())! as BookReader;
+    case 'BookFan': return accessor(index, new BookReader())! as BookReader;
+    case 'Other': return accessor(index, '') as string;
+    case 'Unused': return accessor(index, '') as string;
+    default: return null;
+  }
+}
diff --git a/tests/ts/union_vector/falling-tub.js b/tests/ts/union_vector/falling-tub.js
new file mode 100644
index 0000000..d3c4dfe
--- /dev/null
+++ b/tests/ts/union_vector/falling-tub.js
@@ -0,0 +1,44 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export class FallingTub {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    weight() {
+        return this.bb.readInt32(this.bb_pos);
+    }
+    mutate_weight(value) {
+        this.bb.writeInt32(this.bb_pos + 0, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'FallingTub';
+    }
+    static sizeOf() {
+        return 4;
+    }
+    static createFallingTub(builder, weight) {
+        builder.prep(4, 4);
+        builder.writeInt32(weight);
+        return builder.offset();
+    }
+    unpack() {
+        return new FallingTubT(this.weight());
+    }
+    unpackTo(_o) {
+        _o.weight = this.weight();
+    }
+}
+export class FallingTubT {
+    constructor(weight = 0) {
+        this.weight = weight;
+    }
+    pack(builder) {
+        return FallingTub.createFallingTub(builder, this.weight);
+    }
+}
diff --git a/tests/ts/union_vector/falling-tub.ts b/tests/ts/union_vector/falling-tub.ts
new file mode 100644
index 0000000..b32f99d
--- /dev/null
+++ b/tests/ts/union_vector/falling-tub.ts
@@ -0,0 +1,63 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class FallingTub {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):FallingTub {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+weight():number {
+  return this.bb!.readInt32(this.bb_pos);
+}
+
+mutate_weight(value:number):boolean {
+  this.bb!.writeInt32(this.bb_pos + 0, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'FallingTub';
+}
+
+static sizeOf():number {
+  return 4;
+}
+
+static createFallingTub(builder:flatbuffers.Builder, weight: number):flatbuffers.Offset {
+  builder.prep(4, 4);
+  builder.writeInt32(weight);
+  return builder.offset();
+}
+
+
+unpack(): FallingTubT {
+  return new FallingTubT(
+    this.weight()
+  );
+}
+
+
+unpackTo(_o: FallingTubT): void {
+  _o.weight = this.weight();
+}
+}
+
+export class FallingTubT {
+constructor(
+  public weight: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return FallingTub.createFallingTub(builder,
+    this.weight
+  );
+}
+}
diff --git a/tests/ts/union_vector/gadget.js b/tests/ts/union_vector/gadget.js
new file mode 100644
index 0000000..202a214
--- /dev/null
+++ b/tests/ts/union_vector/gadget.js
@@ -0,0 +1,25 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+import { FallingTub } from './falling-tub.js';
+import { HandFan } from './hand-fan.js';
+export var Gadget;
+(function (Gadget) {
+    Gadget[Gadget["NONE"] = 0] = "NONE";
+    Gadget[Gadget["FallingTub"] = 1] = "FallingTub";
+    Gadget[Gadget["HandFan"] = 2] = "HandFan";
+})(Gadget || (Gadget = {}));
+export function unionToGadget(type, accessor) {
+    switch (Gadget[type]) {
+        case 'NONE': return null;
+        case 'FallingTub': return accessor(new FallingTub());
+        case 'HandFan': return accessor(new HandFan());
+        default: return null;
+    }
+}
+export function unionListToGadget(type, accessor, index) {
+    switch (Gadget[type]) {
+        case 'NONE': return null;
+        case 'FallingTub': return accessor(index, new FallingTub());
+        case 'HandFan': return accessor(index, new HandFan());
+        default: return null;
+    }
+}
diff --git a/tests/ts/union_vector/gadget.ts b/tests/ts/union_vector/gadget.ts
new file mode 100644
index 0000000..b6e117b
--- /dev/null
+++ b/tests/ts/union_vector/gadget.ts
@@ -0,0 +1,36 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import { FallingTub, FallingTubT } from './falling-tub.js';
+import { HandFan, HandFanT } from './hand-fan.js';
+
+
+export enum Gadget {
+  NONE = 0,
+  FallingTub = 1,
+  HandFan = 2
+}
+
+export function unionToGadget(
+  type: Gadget,
+  accessor: (obj:FallingTub|HandFan) => FallingTub|HandFan|null
+): FallingTub|HandFan|null {
+  switch(Gadget[type]) {
+    case 'NONE': return null; 
+    case 'FallingTub': return accessor(new FallingTub())! as FallingTub;
+    case 'HandFan': return accessor(new HandFan())! as HandFan;
+    default: return null;
+  }
+}
+
+export function unionListToGadget(
+  type: Gadget, 
+  accessor: (index: number, obj:FallingTub|HandFan) => FallingTub|HandFan|null, 
+  index: number
+): FallingTub|HandFan|null {
+  switch(Gadget[type]) {
+    case 'NONE': return null; 
+    case 'FallingTub': return accessor(index, new FallingTub())! as FallingTub;
+    case 'HandFan': return accessor(index, new HandFan())! as HandFan;
+    default: return null;
+  }
+}
diff --git a/tests/ts/union_vector/hand-fan.js b/tests/ts/union_vector/hand-fan.js
new file mode 100644
index 0000000..21decca
--- /dev/null
+++ b/tests/ts/union_vector/hand-fan.js
@@ -0,0 +1,64 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+import * as flatbuffers from 'flatbuffers';
+export class HandFan {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    static getRootAsHandFan(bb, obj) {
+        return (obj || new HandFan()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    static getSizePrefixedRootAsHandFan(bb, obj) {
+        bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+        return (obj || new HandFan()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    length() {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        return offset ? this.bb.readInt32(this.bb_pos + offset) : 0;
+    }
+    mutate_length(value) {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        if (offset === 0) {
+            return false;
+        }
+        this.bb.writeInt32(this.bb_pos + offset, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'HandFan';
+    }
+    static startHandFan(builder) {
+        builder.startObject(1);
+    }
+    static addLength(builder, length) {
+        builder.addFieldInt32(0, length, 0);
+    }
+    static endHandFan(builder) {
+        const offset = builder.endObject();
+        return offset;
+    }
+    static createHandFan(builder, length) {
+        HandFan.startHandFan(builder);
+        HandFan.addLength(builder, length);
+        return HandFan.endHandFan(builder);
+    }
+    unpack() {
+        return new HandFanT(this.length());
+    }
+    unpackTo(_o) {
+        _o.length = this.length();
+    }
+}
+export class HandFanT {
+    constructor(length = 0) {
+        this.length = length;
+    }
+    pack(builder) {
+        return HandFan.createHandFan(builder, this.length);
+    }
+}
diff --git a/tests/ts/union_vector/hand-fan.ts b/tests/ts/union_vector/hand-fan.ts
new file mode 100644
index 0000000..f90b4dd
--- /dev/null
+++ b/tests/ts/union_vector/hand-fan.ts
@@ -0,0 +1,87 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class HandFan {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):HandFan {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsHandFan(bb:flatbuffers.ByteBuffer, obj?:HandFan):HandFan {
+  return (obj || new HandFan()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsHandFan(bb:flatbuffers.ByteBuffer, obj?:HandFan):HandFan {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new HandFan()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+length():number {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
+}
+
+mutate_length(value:number):boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeInt32(this.bb_pos + offset, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'HandFan';
+}
+
+static startHandFan(builder:flatbuffers.Builder) {
+  builder.startObject(1);
+}
+
+static addLength(builder:flatbuffers.Builder, length:number) {
+  builder.addFieldInt32(0, length, 0);
+}
+
+static endHandFan(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createHandFan(builder:flatbuffers.Builder, length:number):flatbuffers.Offset {
+  HandFan.startHandFan(builder);
+  HandFan.addLength(builder, length);
+  return HandFan.endHandFan(builder);
+}
+
+unpack(): HandFanT {
+  return new HandFanT(
+    this.length()
+  );
+}
+
+
+unpackTo(_o: HandFanT): void {
+  _o.length = this.length();
+}
+}
+
+export class HandFanT {
+constructor(
+  public length: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return HandFan.createHandFan(builder,
+    this.length
+  );
+}
+}
diff --git a/tests/ts/union_vector/movie.js b/tests/ts/union_vector/movie.js
new file mode 100644
index 0000000..0245a43
--- /dev/null
+++ b/tests/ts/union_vector/movie.js
@@ -0,0 +1,185 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+import * as flatbuffers from 'flatbuffers';
+import { Character, unionToCharacter, unionListToCharacter } from './character.js';
+export class Movie {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    static getRootAsMovie(bb, obj) {
+        return (obj || new Movie()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    static getSizePrefixedRootAsMovie(bb, obj) {
+        bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+        return (obj || new Movie()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+    }
+    static bufferHasIdentifier(bb) {
+        return bb.__has_identifier('MOVI');
+    }
+    mainCharacterType() {
+        const offset = this.bb.__offset(this.bb_pos, 4);
+        return offset ? this.bb.readUint8(this.bb_pos + offset) : Character.NONE;
+    }
+    mainCharacter(obj) {
+        const offset = this.bb.__offset(this.bb_pos, 6);
+        return offset ? this.bb.__union_with_string(obj, this.bb_pos + offset) : null;
+    }
+    charactersType(index) {
+        const offset = this.bb.__offset(this.bb_pos, 8);
+        return offset ? this.bb.readUint8(this.bb.__vector(this.bb_pos + offset) + index) : 0;
+    }
+    charactersTypeLength() {
+        const offset = this.bb.__offset(this.bb_pos, 8);
+        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
+    }
+    charactersTypeArray() {
+        const offset = this.bb.__offset(this.bb_pos, 8);
+        return offset ? new Uint8Array(this.bb.bytes().buffer, this.bb.bytes().byteOffset + this.bb.__vector(this.bb_pos + offset), this.bb.__vector_len(this.bb_pos + offset)) : null;
+    }
+    characters(index, obj) {
+        const offset = this.bb.__offset(this.bb_pos, 10);
+        return offset ? this.bb.__union_with_string(obj, this.bb.__vector(this.bb_pos + offset) + index * 4) : null;
+    }
+    charactersLength() {
+        const offset = this.bb.__offset(this.bb_pos, 10);
+        return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
+    }
+    static getFullyQualifiedName() {
+        return 'Movie';
+    }
+    static startMovie(builder) {
+        builder.startObject(4);
+    }
+    static addMainCharacterType(builder, mainCharacterType) {
+        builder.addFieldInt8(0, mainCharacterType, Character.NONE);
+    }
+    static addMainCharacter(builder, mainCharacterOffset) {
+        builder.addFieldOffset(1, mainCharacterOffset, 0);
+    }
+    static addCharactersType(builder, charactersTypeOffset) {
+        builder.addFieldOffset(2, charactersTypeOffset, 0);
+    }
+    static createCharactersTypeVector(builder, data) {
+        builder.startVector(1, data.length, 1);
+        for (let i = data.length - 1; i >= 0; i--) {
+            builder.addInt8(data[i]);
+        }
+        return builder.endVector();
+    }
+    static startCharactersTypeVector(builder, numElems) {
+        builder.startVector(1, numElems, 1);
+    }
+    static addCharacters(builder, charactersOffset) {
+        builder.addFieldOffset(3, charactersOffset, 0);
+    }
+    static createCharactersVector(builder, data) {
+        builder.startVector(4, data.length, 4);
+        for (let i = data.length - 1; i >= 0; i--) {
+            builder.addOffset(data[i]);
+        }
+        return builder.endVector();
+    }
+    static startCharactersVector(builder, numElems) {
+        builder.startVector(4, numElems, 4);
+    }
+    static endMovie(builder) {
+        const offset = builder.endObject();
+        return offset;
+    }
+    static finishMovieBuffer(builder, offset) {
+        builder.finish(offset, 'MOVI');
+    }
+    static finishSizePrefixedMovieBuffer(builder, offset) {
+        builder.finish(offset, 'MOVI', true);
+    }
+    static createMovie(builder, mainCharacterType, mainCharacterOffset, charactersTypeOffset, charactersOffset) {
+        Movie.startMovie(builder);
+        Movie.addMainCharacterType(builder, mainCharacterType);
+        Movie.addMainCharacter(builder, mainCharacterOffset);
+        Movie.addCharactersType(builder, charactersTypeOffset);
+        Movie.addCharacters(builder, charactersOffset);
+        return Movie.endMovie(builder);
+    }
+    unpack() {
+        return new MovieT(this.mainCharacterType(), (() => {
+            let temp = unionToCharacter(this.mainCharacterType(), this.mainCharacter.bind(this));
+            if (temp === null) {
+                return null;
+            }
+            if (typeof temp === 'string') {
+                return temp;
+            }
+            return temp.unpack();
+        })(), this.bb.createScalarList(this.charactersType.bind(this), this.charactersTypeLength()), (() => {
+            let ret = [];
+            for (let targetEnumIndex = 0; targetEnumIndex < this.charactersTypeLength(); ++targetEnumIndex) {
+                let targetEnum = this.charactersType(targetEnumIndex);
+                if (targetEnum === null || Character[targetEnum] === 'NONE') {
+                    continue;
+                }
+                let temp = unionListToCharacter(targetEnum, this.characters.bind(this), targetEnumIndex);
+                if (temp === null) {
+                    continue;
+                }
+                if (typeof temp === 'string') {
+                    ret.push(temp);
+                    continue;
+                }
+                ret.push(temp.unpack());
+            }
+            return ret;
+        })());
+    }
+    unpackTo(_o) {
+        _o.mainCharacterType = this.mainCharacterType();
+        _o.mainCharacter = (() => {
+            let temp = unionToCharacter(this.mainCharacterType(), this.mainCharacter.bind(this));
+            if (temp === null) {
+                return null;
+            }
+            if (typeof temp === 'string') {
+                return temp;
+            }
+            return temp.unpack();
+        })();
+        _o.charactersType = this.bb.createScalarList(this.charactersType.bind(this), this.charactersTypeLength());
+        _o.characters = (() => {
+            let ret = [];
+            for (let targetEnumIndex = 0; targetEnumIndex < this.charactersTypeLength(); ++targetEnumIndex) {
+                let targetEnum = this.charactersType(targetEnumIndex);
+                if (targetEnum === null || Character[targetEnum] === 'NONE') {
+                    continue;
+                }
+                let temp = unionListToCharacter(targetEnum, this.characters.bind(this), targetEnumIndex);
+                if (temp === null) {
+                    continue;
+                }
+                if (typeof temp === 'string') {
+                    ret.push(temp);
+                    continue;
+                }
+                ret.push(temp.unpack());
+            }
+            return ret;
+        })();
+    }
+}
+export class MovieT {
+    constructor(mainCharacterType = Character.NONE, mainCharacter = null, charactersType = [], characters = []) {
+        this.mainCharacterType = mainCharacterType;
+        this.mainCharacter = mainCharacter;
+        this.charactersType = charactersType;
+        this.characters = characters;
+    }
+    pack(builder) {
+        const mainCharacter = builder.createObjectOffset(this.mainCharacter);
+        const charactersType = Movie.createCharactersTypeVector(builder, this.charactersType);
+        const characters = Movie.createCharactersVector(builder, builder.createObjectOffsetList(this.characters));
+        return Movie.createMovie(builder, this.mainCharacterType, mainCharacter, charactersType, characters);
+    }
+}
diff --git a/tests/ts/union_vector/movie.ts b/tests/ts/union_vector/movie.ts
new file mode 100644
index 0000000..6edeb53
--- /dev/null
+++ b/tests/ts/union_vector/movie.ts
@@ -0,0 +1,211 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+import { Attacker, AttackerT } from './attacker.js';
+import { BookReader, BookReaderT } from './book-reader.js';
+import { Character, unionToCharacter, unionListToCharacter } from './character.js';
+import { Rapunzel, RapunzelT } from './rapunzel.js';
+
+
+export class Movie {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):Movie {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsMovie(bb:flatbuffers.ByteBuffer, obj?:Movie):Movie {
+  return (obj || new Movie()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsMovie(bb:flatbuffers.ByteBuffer, obj?:Movie):Movie {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new Movie()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static bufferHasIdentifier(bb:flatbuffers.ByteBuffer):boolean {
+  return bb.__has_identifier('MOVI');
+}
+
+mainCharacterType():Character {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.readUint8(this.bb_pos + offset) : Character.NONE;
+}
+
+mainCharacter<T extends flatbuffers.Table>(obj:any|string):any|string|null {
+  const offset = this.bb!.__offset(this.bb_pos, 6);
+  return offset ? this.bb!.__union_with_string(obj, this.bb_pos + offset) : null;
+}
+
+charactersType(index: number):Character|null {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? this.bb!.readUint8(this.bb!.__vector(this.bb_pos + offset) + index) : 0;
+}
+
+charactersTypeLength():number {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
+}
+
+charactersTypeArray():Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 8);
+  return offset ? new Uint8Array(this.bb!.bytes().buffer, this.bb!.bytes().byteOffset + this.bb!.__vector(this.bb_pos + offset), this.bb!.__vector_len(this.bb_pos + offset)) : null;
+}
+
+characters(index: number, obj:any|string):any|string|null {
+  const offset = this.bb!.__offset(this.bb_pos, 10);
+  return offset ? this.bb!.__union_with_string(obj, this.bb!.__vector(this.bb_pos + offset) + index * 4) : null;
+}
+
+charactersLength():number {
+  const offset = this.bb!.__offset(this.bb_pos, 10);
+  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
+}
+
+static getFullyQualifiedName():string {
+  return 'Movie';
+}
+
+static startMovie(builder:flatbuffers.Builder) {
+  builder.startObject(4);
+}
+
+static addMainCharacterType(builder:flatbuffers.Builder, mainCharacterType:Character) {
+  builder.addFieldInt8(0, mainCharacterType, Character.NONE);
+}
+
+static addMainCharacter(builder:flatbuffers.Builder, mainCharacterOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(1, mainCharacterOffset, 0);
+}
+
+static addCharactersType(builder:flatbuffers.Builder, charactersTypeOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(2, charactersTypeOffset, 0);
+}
+
+static createCharactersTypeVector(builder:flatbuffers.Builder, data:Character[]):flatbuffers.Offset {
+  builder.startVector(1, data.length, 1);
+  for (let i = data.length - 1; i >= 0; i--) {
+    builder.addInt8(data[i]!);
+  }
+  return builder.endVector();
+}
+
+static startCharactersTypeVector(builder:flatbuffers.Builder, numElems:number) {
+  builder.startVector(1, numElems, 1);
+}
+
+static addCharacters(builder:flatbuffers.Builder, charactersOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(3, charactersOffset, 0);
+}
+
+static createCharactersVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
+  builder.startVector(4, data.length, 4);
+  for (let i = data.length - 1; i >= 0; i--) {
+    builder.addOffset(data[i]!);
+  }
+  return builder.endVector();
+}
+
+static startCharactersVector(builder:flatbuffers.Builder, numElems:number) {
+  builder.startVector(4, numElems, 4);
+}
+
+static endMovie(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static finishMovieBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offset) {
+  builder.finish(offset, 'MOVI');
+}
+
+static finishSizePrefixedMovieBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offset) {
+  builder.finish(offset, 'MOVI', true);
+}
+
+static createMovie(builder:flatbuffers.Builder, mainCharacterType:Character, mainCharacterOffset:flatbuffers.Offset, charactersTypeOffset:flatbuffers.Offset, charactersOffset:flatbuffers.Offset):flatbuffers.Offset {
+  Movie.startMovie(builder);
+  Movie.addMainCharacterType(builder, mainCharacterType);
+  Movie.addMainCharacter(builder, mainCharacterOffset);
+  Movie.addCharactersType(builder, charactersTypeOffset);
+  Movie.addCharacters(builder, charactersOffset);
+  return Movie.endMovie(builder);
+}
+
+unpack(): MovieT {
+  return new MovieT(
+    this.mainCharacterType(),
+    (() => {
+      let temp = unionToCharacter(this.mainCharacterType(), this.mainCharacter.bind(this));
+      if(temp === null) { return null; }
+      if(typeof temp === 'string') { return temp; }
+      return temp.unpack()
+  })(),
+    this.bb!.createScalarList(this.charactersType.bind(this), this.charactersTypeLength()),
+    (() => {
+    let ret = [];
+    for(let targetEnumIndex = 0; targetEnumIndex < this.charactersTypeLength(); ++targetEnumIndex) {
+      let targetEnum = this.charactersType(targetEnumIndex);
+      if(targetEnum === null || Character[targetEnum!] === 'NONE') { continue; }
+
+      let temp = unionListToCharacter(targetEnum, this.characters.bind(this), targetEnumIndex);
+      if(temp === null) { continue; }
+      if(typeof temp === 'string') { ret.push(temp); continue; }
+      ret.push(temp.unpack());
+    }
+    return ret;
+  })()
+  );
+}
+
+
+unpackTo(_o: MovieT): void {
+  _o.mainCharacterType = this.mainCharacterType();
+  _o.mainCharacter = (() => {
+      let temp = unionToCharacter(this.mainCharacterType(), this.mainCharacter.bind(this));
+      if(temp === null) { return null; }
+      if(typeof temp === 'string') { return temp; }
+      return temp.unpack()
+  })();
+  _o.charactersType = this.bb!.createScalarList(this.charactersType.bind(this), this.charactersTypeLength());
+  _o.characters = (() => {
+    let ret = [];
+    for(let targetEnumIndex = 0; targetEnumIndex < this.charactersTypeLength(); ++targetEnumIndex) {
+      let targetEnum = this.charactersType(targetEnumIndex);
+      if(targetEnum === null || Character[targetEnum!] === 'NONE') { continue; }
+
+      let temp = unionListToCharacter(targetEnum, this.characters.bind(this), targetEnumIndex);
+      if(temp === null) { continue; }
+      if(typeof temp === 'string') { ret.push(temp); continue; }
+      ret.push(temp.unpack());
+    }
+    return ret;
+  })();
+}
+}
+
+export class MovieT {
+constructor(
+  public mainCharacterType: Character = Character.NONE,
+  public mainCharacter: AttackerT|BookReaderT|RapunzelT|string|null = null,
+  public charactersType: (Character)[] = [],
+  public characters: (AttackerT|BookReaderT|RapunzelT|string)[] = []
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  const mainCharacter = builder.createObjectOffset(this.mainCharacter);
+  const charactersType = Movie.createCharactersTypeVector(builder, this.charactersType);
+  const characters = Movie.createCharactersVector(builder, builder.createObjectOffsetList(this.characters));
+
+  return Movie.createMovie(builder,
+    this.mainCharacterType,
+    mainCharacter,
+    charactersType,
+    characters
+  );
+}
+}
diff --git a/tests/ts/union_vector/rapunzel.js b/tests/ts/union_vector/rapunzel.js
new file mode 100644
index 0000000..67a5e44
--- /dev/null
+++ b/tests/ts/union_vector/rapunzel.js
@@ -0,0 +1,44 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export class Rapunzel {
+    constructor() {
+        this.bb = null;
+        this.bb_pos = 0;
+    }
+    __init(i, bb) {
+        this.bb_pos = i;
+        this.bb = bb;
+        return this;
+    }
+    hairLength() {
+        return this.bb.readInt32(this.bb_pos);
+    }
+    mutate_hair_length(value) {
+        this.bb.writeInt32(this.bb_pos + 0, value);
+        return true;
+    }
+    static getFullyQualifiedName() {
+        return 'Rapunzel';
+    }
+    static sizeOf() {
+        return 4;
+    }
+    static createRapunzel(builder, hair_length) {
+        builder.prep(4, 4);
+        builder.writeInt32(hair_length);
+        return builder.offset();
+    }
+    unpack() {
+        return new RapunzelT(this.hairLength());
+    }
+    unpackTo(_o) {
+        _o.hairLength = this.hairLength();
+    }
+}
+export class RapunzelT {
+    constructor(hairLength = 0) {
+        this.hairLength = hairLength;
+    }
+    pack(builder) {
+        return Rapunzel.createRapunzel(builder, this.hairLength);
+    }
+}
diff --git a/tests/ts/union_vector/rapunzel.ts b/tests/ts/union_vector/rapunzel.ts
new file mode 100644
index 0000000..e1dc63d
--- /dev/null
+++ b/tests/ts/union_vector/rapunzel.ts
@@ -0,0 +1,63 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+
+
+export class Rapunzel {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):Rapunzel {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+hairLength():number {
+  return this.bb!.readInt32(this.bb_pos);
+}
+
+mutate_hair_length(value:number):boolean {
+  this.bb!.writeInt32(this.bb_pos + 0, value);
+  return true;
+}
+
+static getFullyQualifiedName():string {
+  return 'Rapunzel';
+}
+
+static sizeOf():number {
+  return 4;
+}
+
+static createRapunzel(builder:flatbuffers.Builder, hair_length: number):flatbuffers.Offset {
+  builder.prep(4, 4);
+  builder.writeInt32(hair_length);
+  return builder.offset();
+}
+
+
+unpack(): RapunzelT {
+  return new RapunzelT(
+    this.hairLength()
+  );
+}
+
+
+unpackTo(_o: RapunzelT): void {
+  _o.hairLength = this.hairLength();
+}
+}
+
+export class RapunzelT {
+constructor(
+  public hairLength: number = 0
+){}
+
+
+pack(builder:flatbuffers.Builder): flatbuffers.Offset {
+  return Rapunzel.createRapunzel(builder,
+    this.hairLength
+  );
+}
+}
diff --git a/tests/ts/union_vector/union_vector_generated.js b/tests/ts/union_vector/union_vector_generated.js
new file mode 100644
index 0000000..69ea199
--- /dev/null
+++ b/tests/ts/union_vector/union_vector_generated.js
@@ -0,0 +1,9 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+export { Attacker, AttackerT } from './attacker.js';
+export { BookReader, BookReaderT } from './book-reader.js';
+export { Character, unionToCharacter, unionListToCharacter } from './character.js';
+export { FallingTub, FallingTubT } from './falling-tub.js';
+export { Gadget, unionToGadget, unionListToGadget } from './gadget.js';
+export { HandFan, HandFanT } from './hand-fan.js';
+export { Movie, MovieT } from './movie.js';
+export { Rapunzel, RapunzelT } from './rapunzel.js';
diff --git a/tests/ts/union_vector/union_vector_generated.ts b/tests/ts/union_vector/union_vector_generated.ts
new file mode 100644
index 0000000..5527abe
--- /dev/null
+++ b/tests/ts/union_vector/union_vector_generated.ts
@@ -0,0 +1,10 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+export { Attacker, AttackerT } from './attacker.js';
+export { BookReader, BookReaderT } from './book-reader.js';
+export { Character, unionToCharacter, unionListToCharacter } from './character.js';
+export { FallingTub, FallingTubT } from './falling-tub.js';
+export { Gadget, unionToGadget, unionListToGadget } from './gadget.js';
+export { HandFan, HandFanT } from './hand-fan.js';
+export { Movie, MovieT } from './movie.js';
+export { Rapunzel, RapunzelT } from './rapunzel.js';