make unions with type aliases more usable (#5019)

Some generic C++ and Rust code is not generated when unions use type
aliases because of potential ambiguity. Actually check for this
ambiguity and only disable offending code only if it is found.

include/flatbuffers/idl.h

@@ -327,7 +327,7 @@ struct EnumVal {
 };
 
 struct EnumDef : public Definition {
-  EnumDef() : is_union(false), uses_type_aliases(false) {}
+  EnumDef() : is_union(false), uses_multiple_type_instances(false) {}
 
   EnumVal *ReverseLookup(int64_t enum_idx, bool skip_union_default = true) {
     for (auto it = vals.vec.begin() +
@@ -342,7 +342,9 @@ struct EnumDef : public Definition {
 
   SymbolTable<EnumVal> vals;
   bool is_union;
-  bool uses_type_aliases;
+  // Type is a union which uses type aliases where at least one type is
+  // available under two different names.
+  bool uses_multiple_type_instances;
   Type underlying_type;
 };
 

src/idl_gen_cpp.cpp

@@ -1025,7 +1025,7 @@ class CppGenerator : public BaseGenerator {
     }
 
     // Generate type traits for unions to map from a type to union enum value.
-    if (enum_def.is_union && !enum_def.uses_type_aliases) {
+    if (enum_def.is_union && !enum_def.uses_multiple_type_instances) {
       for (auto it = enum_def.vals.vec.begin(); it != enum_def.vals.vec.end();
            ++it) {
         const auto &ev = **it;
@@ -1074,7 +1074,7 @@ class CppGenerator : public BaseGenerator {
       code_ += "";
       code_ += "  void Reset();";
       code_ += "";
-      if (!enum_def.uses_type_aliases) {
+      if (!enum_def.uses_multiple_type_instances) {
         code_ += "#ifndef FLATBUFFERS_CPP98_STL";
         code_ += "  template <typename T>";
         code_ += "  void Set(T&& val) {";
@@ -1773,9 +1773,10 @@ class CppGenerator : public BaseGenerator {
       if (field.value.type.base_type == BASE_TYPE_UNION) {
         auto u = field.value.type.enum_def;
 
-        code_ +=
-            "  template<typename T> "
-            "const T *{{NULLABLE_EXT}}{{FIELD_NAME}}_as() const;";
+        if (!field.value.type.enum_def->uses_multiple_type_instances)
+          code_ +=
+              "  template<typename T> "
+              "const T *{{NULLABLE_EXT}}{{FIELD_NAME}}_as() const;";
 
         for (auto u_it = u->vals.vec.begin(); u_it != u->vals.vec.end();
              ++u_it) {
@@ -1906,7 +1907,7 @@ class CppGenerator : public BaseGenerator {
       }
 
       auto u = field.value.type.enum_def;
-      if (u->uses_type_aliases) continue;
+      if (u->uses_multiple_type_instances) continue;
 
       code_.SetValue("FIELD_NAME", Name(field));
 

src/idl_gen_rust.cpp

@@ -1307,7 +1307,6 @@ class RustGenerator : public BaseGenerator {
       }
 
       auto u = field.value.type.enum_def;
-      if (u->uses_type_aliases) continue;
 
       code_.SetValue("FIELD_NAME", Name(field));
 

src/idl_parser.cpp

@@ -1603,6 +1603,7 @@ CheckedError Parser::ParseEnum(bool is_union, EnumDef **dest) {
   ECHECK(ParseMetaData(&enum_def->attributes));
   EXPECT('{');
   if (is_union) enum_def->vals.Add("NONE", new EnumVal("NONE", 0));
+  std::set<std::pair<BaseType, StructDef*>> union_types;
   for (;;) {
     if (opts.proto_mode && attribute_ == "option") {
       ECHECK(ParseProtoOption());
@@ -1633,10 +1634,17 @@ CheckedError Parser::ParseEnum(bool is_union, EnumDef **dest) {
           if (ev.union_type.base_type != BASE_TYPE_STRUCT &&
               ev.union_type.base_type != BASE_TYPE_STRING)
             return Error("union value type may only be table/struct/string");
-          enum_def->uses_type_aliases = true;
         } else {
           ev.union_type = Type(BASE_TYPE_STRUCT, LookupCreateStruct(full_name));
         }
+        if (!enum_def->uses_multiple_type_instances) {
+          auto union_type_key = std::make_pair(ev.union_type.base_type, ev.union_type.struct_def);
+          if (union_types.count(union_type_key) > 0) {
+            enum_def->uses_multiple_type_instances = true;
+          } else {
+            union_types.insert(union_type_key);
+          }
+        }
       }
       if (Is('=')) {
         NEXT();

tests/FlatBuffers.Test/FlatBuffers.Test.csproj

-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -65,6 +65,12 @@
     <Compile Include="..\MyGame\Example\Any.cs">
       <Link>MyGame\Example\Any.cs</Link>
     </Compile>
+    <Compile Include="..\MyGame\Example\AnyAmbiguousAliases.cs">
+      <Link>MyGame\Example\AnyAmbiguousAliases.cs</Link>
+    </Compile>
+    <Compile Include="..\MyGame\Example\AnyUniqueAliases.cs">
+      <Link>MyGame\Example\AnyUniqueAliases.cs</Link>
+    </Compile>
     <Compile Include="..\MyGame\Example\Color.cs">
       <Link>MyGame\Example\Color.cs</Link>
     </Compile>
@@ -131,4 +137,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>
\ No newline at end of file

tests/MyGame/Example/AnyAmbiguousAliases.cs

+// <auto-generated>
+//  automatically generated by the FlatBuffers compiler, do not modify
+// </auto-generated>
+
+namespace MyGame.Example
+{
+
+public enum AnyAmbiguousAliases : byte
+{
+ NONE = 0,
+ M1 = 1,
+ M2 = 2,
+ M3 = 3,
+};
+
+
+}

tests/MyGame/Example/AnyAmbiguousAliases.go

+// Code generated by the FlatBuffers compiler. DO NOT EDIT.
+
+package Example
+
+type AnyAmbiguousAliases = byte
+const (
+	AnyAmbiguousAliasesNONE AnyAmbiguousAliases = 0
+	AnyAmbiguousAliasesM1 AnyAmbiguousAliases = 1
+	AnyAmbiguousAliasesM2 AnyAmbiguousAliases = 2
+	AnyAmbiguousAliasesM3 AnyAmbiguousAliases = 3
+)
+
+var EnumNamesAnyAmbiguousAliases = map[AnyAmbiguousAliases]string{
+	AnyAmbiguousAliasesNONE:"NONE",
+	AnyAmbiguousAliasesM1:"M1",
+	AnyAmbiguousAliasesM2:"M2",
+	AnyAmbiguousAliasesM3:"M3",
+}
+

tests/MyGame/Example/AnyAmbiguousAliases.java

+// automatically generated by the FlatBuffers compiler, do not modify
+
+package MyGame.Example;
+
+
+@javax.annotation.Generated(value="flatc")
+public final class AnyAmbiguousAliases {
+  private AnyAmbiguousAliases() { }
+  public static final byte NONE = 0;
+  public static final byte M1 = 1;
+  public static final byte M2 = 2;
+  public static final byte M3 = 3;
+
+  public static final String[] names = { "NONE", "M1", "M2", "M3", };
+
+  public static String name(int e) { return names[e]; }
+}
+

tests/MyGame/Example/AnyAmbiguousAliases.lua

+-- automatically generated by the FlatBuffers compiler, do not modify
+
+-- namespace: Example
+
+local AnyAmbiguousAliases = {
+    NONE = 0,
+    M1 = 1,
+    M2 = 2,
+    M3 = 3,
+}
+
+return AnyAmbiguousAliases -- return the module
\ No newline at end of file

tests/MyGame/Example/AnyAmbiguousAliases.php

+<?php
+// automatically generated by the FlatBuffers compiler, do not modify
+
+namespace MyGame\Example;
+
+class AnyAmbiguousAliases
+{
+    const NONE = 0;
+    const M1 = 1;
+    const M2 = 2;
+    const M3 = 3;
+
+    private static $names = array(
+        "NONE",
+        "M1",
+        "M2",
+        "M3",
+    );
+
+    public static function Name($e)
+    {
+        if (!isset(self::$names[$e])) {
+            throw new \Exception();
+        }
+        return self::$names[$e];
+    }
+}

tests/MyGame/Example/AnyAmbiguousAliases.py

+# automatically generated by the FlatBuffers compiler, do not modify
+
+# namespace: Example
+
+class AnyAmbiguousAliases(object):
+    NONE = 0
+    M1 = 1
+    M2 = 2
+    M3 = 3
+

tests/MyGame/Example/AnyUniqueAliases.cs

+// <auto-generated>
+//  automatically generated by the FlatBuffers compiler, do not modify
+// </auto-generated>
+
+namespace MyGame.Example
+{
+
+public enum AnyUniqueAliases : byte
+{
+ NONE = 0,
+ M = 1,
+ T = 2,
+ M2 = 3,
+};
+
+
+}

tests/MyGame/Example/AnyUniqueAliases.go

+// Code generated by the FlatBuffers compiler. DO NOT EDIT.
+
+package Example
+
+type AnyUniqueAliases = byte
+const (
+	AnyUniqueAliasesNONE AnyUniqueAliases = 0
+	AnyUniqueAliasesM AnyUniqueAliases = 1
+	AnyUniqueAliasesT AnyUniqueAliases = 2
+	AnyUniqueAliasesM2 AnyUniqueAliases = 3
+)
+
+var EnumNamesAnyUniqueAliases = map[AnyUniqueAliases]string{
+	AnyUniqueAliasesNONE:"NONE",
+	AnyUniqueAliasesM:"M",
+	AnyUniqueAliasesT:"T",
+	AnyUniqueAliasesM2:"M2",
+}
+

tests/MyGame/Example/AnyUniqueAliases.java

+// automatically generated by the FlatBuffers compiler, do not modify
+
+package MyGame.Example;
+
+
+@javax.annotation.Generated(value="flatc")
+public final class AnyUniqueAliases {
+  private AnyUniqueAliases() { }
+  public static final byte NONE = 0;
+  public static final byte M = 1;
+  public static final byte T = 2;
+  public static final byte M2 = 3;
+
+  public static final String[] names = { "NONE", "M", "T", "M2", };
+
+  public static String name(int e) { return names[e]; }
+}
+

tests/MyGame/Example/AnyUniqueAliases.lua

+-- automatically generated by the FlatBuffers compiler, do not modify
+
+-- namespace: Example
+
+local AnyUniqueAliases = {
+    NONE = 0,
+    M = 1,
+    T = 2,
+    M2 = 3,
+}
+
+return AnyUniqueAliases -- return the module
\ No newline at end of file

tests/MyGame/Example/AnyUniqueAliases.php

+<?php
+// automatically generated by the FlatBuffers compiler, do not modify
+
+namespace MyGame\Example;
+
+class AnyUniqueAliases
+{
+    const NONE = 0;
+    const M = 1;
+    const T = 2;
+    const M2 = 3;
+
+    private static $names = array(
+        "NONE",
+        "M",
+        "T",
+        "M2",
+    );
+
+    public static function Name($e)
+    {
+        if (!isset(self::$names[$e])) {
+            throw new \Exception();
+        }
+        return self::$names[$e];
+    }
+}

tests/MyGame/Example/AnyUniqueAliases.py

+# automatically generated by the FlatBuffers compiler, do not modify
+
+# namespace: Example
+
+class AnyUniqueAliases(object):
+    NONE = 0
+    M = 1
+    T = 2
+    M2 = 3
+

tests/MyGame/Example/Monster.cs

@@ -172,8 +172,14 @@ public struct Monster : IFlatbufferObject
 #endif
   public ulong[] GetVectorOfNonOwningReferencesArray() { return __p.__vector_as_array<ulong>(88); }
   public bool MutateVectorOfNonOwningReferences(int j, ulong vector_of_non_owning_references) { int o = __p.__offset(88); if (o != 0) { __p.bb.PutUlong(__p.__vector(o) + j * 8, vector_of_non_owning_references); return true; } else { return false; } }
+  public AnyUniqueAliases AnyUniqueType { get { int o = __p.__offset(90); return o != 0 ? (AnyUniqueAliases)__p.bb.Get(o + __p.bb_pos) : AnyUniqueAliases.NONE; } }
+  public bool MutateAnyUniqueType(AnyUniqueAliases any_unique_type) { int o = __p.__offset(90); if (o != 0) { __p.bb.Put(o + __p.bb_pos, (byte)any_unique_type); return true; } else { return false; } }
+  public TTable? AnyUnique<TTable>() where TTable : struct, IFlatbufferObject { int o = __p.__offset(92); return o != 0 ? (TTable?)__p.__union<TTable>(o) : null; }
+  public AnyAmbiguousAliases AnyAmbiguousType { get { int o = __p.__offset(94); return o != 0 ? (AnyAmbiguousAliases)__p.bb.Get(o + __p.bb_pos) : AnyAmbiguousAliases.NONE; } }
+  public bool MutateAnyAmbiguousType(AnyAmbiguousAliases any_ambiguous_type) { int o = __p.__offset(94); if (o != 0) { __p.bb.Put(o + __p.bb_pos, (byte)any_ambiguous_type); return true; } else { return false; } }
+  public TTable? AnyAmbiguous<TTable>() where TTable : struct, IFlatbufferObject { int o = __p.__offset(96); return o != 0 ? (TTable?)__p.__union<TTable>(o) : null; }
 
-  public static void StartMonster(FlatBufferBuilder builder) { builder.StartObject(43); }
+  public static void StartMonster(FlatBufferBuilder builder) { builder.StartObject(47); }
   public static void AddPos(FlatBufferBuilder builder, Offset<Vec3> posOffset) { builder.AddStruct(0, posOffset.Value, 0); }
   public static void AddMana(FlatBufferBuilder builder, short mana) { builder.AddShort(1, mana, 150); }
   public static void AddHp(FlatBufferBuilder builder, short hp) { builder.AddShort(2, hp, 100); }
@@ -261,6 +267,10 @@ public struct Monster : IFlatbufferObject
   public static VectorOffset CreateVectorOfNonOwningReferencesVector(FlatBufferBuilder builder, ulong[] data) { builder.StartVector(8, data.Length, 8); for (int i = data.Length - 1; i >= 0; i--) builder.AddUlong(data[i]); return builder.EndVector(); }
   public static VectorOffset CreateVectorOfNonOwningReferencesVectorBlock(FlatBufferBuilder builder, ulong[] data) { builder.StartVector(8, data.Length, 8); builder.Add(data); return builder.EndVector(); }
   public static void StartVectorOfNonOwningReferencesVector(FlatBufferBuilder builder, int numElems) { builder.StartVector(8, numElems, 8); }
+  public static void AddAnyUniqueType(FlatBufferBuilder builder, AnyUniqueAliases anyUniqueType) { builder.AddByte(43, (byte)anyUniqueType, 0); }
+  public static void AddAnyUnique(FlatBufferBuilder builder, int anyUniqueOffset) { builder.AddOffset(44, anyUniqueOffset, 0); }
+  public static void AddAnyAmbiguousType(FlatBufferBuilder builder, AnyAmbiguousAliases anyAmbiguousType) { builder.AddByte(45, (byte)anyAmbiguousType, 0); }
+  public static void AddAnyAmbiguous(FlatBufferBuilder builder, int anyAmbiguousOffset) { builder.AddOffset(46, anyAmbiguousOffset, 0); }
   public static Offset<Monster> EndMonster(FlatBufferBuilder builder) {
     int o = builder.EndObject();
     builder.Required(o, 10);  // name

tests/MyGame/Example/Monster.go

@@ -656,8 +656,50 @@ func (rcv *Monster) VectorOfNonOwningReferencesLength() int {
 	return 0
 }
 
+func (rcv *Monster) AnyUniqueType() byte {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(90))
+	if o != 0 {
+		return rcv._tab.GetByte(o + rcv._tab.Pos)
+	}
+	return 0
+}
+
+func (rcv *Monster) MutateAnyUniqueType(n byte) bool {
+	return rcv._tab.MutateByteSlot(90, n)
+}
+
+func (rcv *Monster) AnyUnique(obj *flatbuffers.Table) bool {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(92))
+	if o != 0 {
+		rcv._tab.Union(obj, o)
+		return true
+	}
+	return false
+}
+
+func (rcv *Monster) AnyAmbiguousType() byte {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(94))
+	if o != 0 {
+		return rcv._tab.GetByte(o + rcv._tab.Pos)
+	}
+	return 0
+}
+
+func (rcv *Monster) MutateAnyAmbiguousType(n byte) bool {
+	return rcv._tab.MutateByteSlot(94, n)
+}
+
+func (rcv *Monster) AnyAmbiguous(obj *flatbuffers.Table) bool {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(96))
+	if o != 0 {
+		rcv._tab.Union(obj, o)
+		return true
+	}
+	return false
+}
+
 func MonsterStart(builder *flatbuffers.Builder) {
-	builder.StartObject(43)
+	builder.StartObject(47)
 }
 func MonsterAddPos(builder *flatbuffers.Builder, pos flatbuffers.UOffsetT) {
 	builder.PrependStructSlot(0, flatbuffers.UOffsetT(pos), 0)
@@ -836,6 +878,18 @@ func MonsterAddVectorOfNonOwningReferences(builder *flatbuffers.Builder, vectorO
 func MonsterStartVectorOfNonOwningReferencesVector(builder *flatbuffers.Builder, numElems int) flatbuffers.UOffsetT {
 	return builder.StartVector(8, numElems, 8)
 }
+func MonsterAddAnyUniqueType(builder *flatbuffers.Builder, anyUniqueType byte) {
+	builder.PrependByteSlot(43, anyUniqueType, 0)
+}
+func MonsterAddAnyUnique(builder *flatbuffers.Builder, anyUnique flatbuffers.UOffsetT) {
+	builder.PrependUOffsetTSlot(44, flatbuffers.UOffsetT(anyUnique), 0)
+}
+func MonsterAddAnyAmbiguousType(builder *flatbuffers.Builder, anyAmbiguousType byte) {
+	builder.PrependByteSlot(45, anyAmbiguousType, 0)
+}
+func MonsterAddAnyAmbiguous(builder *flatbuffers.Builder, anyAmbiguous flatbuffers.UOffsetT) {
+	builder.PrependUOffsetTSlot(46, flatbuffers.UOffsetT(anyAmbiguous), 0)
+}
 func MonsterEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
 	return builder.EndObject()
 }

tests/MyGame/Example/Monster.java

@@ -148,8 +148,14 @@ public final class Monster extends Table {
   public ByteBuffer vectorOfNonOwningReferencesAsByteBuffer() { return __vector_as_bytebuffer(88, 8); }
   public ByteBuffer vectorOfNonOwningReferencesInByteBuffer(ByteBuffer _bb) { return __vector_in_bytebuffer(_bb, 88, 8); }
   public boolean mutateVectorOfNonOwningReferences(int j, long vector_of_non_owning_references) { int o = __offset(88); if (o != 0) { bb.putLong(__vector(o) + j * 8, vector_of_non_owning_references); return true; } else { return false; } }
+  public byte anyUniqueType() { int o = __offset(90); return o != 0 ? bb.get(o + bb_pos) : 0; }
+  public boolean mutateAnyUniqueType(byte any_unique_type) { int o = __offset(90); if (o != 0) { bb.put(o + bb_pos, any_unique_type); return true; } else { return false; } }
+  public Table anyUnique(Table obj) { int o = __offset(92); return o != 0 ? __union(obj, o) : null; }
+  public byte anyAmbiguousType() { int o = __offset(94); return o != 0 ? bb.get(o + bb_pos) : 0; }
+  public boolean mutateAnyAmbiguousType(byte any_ambiguous_type) { int o = __offset(94); if (o != 0) { bb.put(o + bb_pos, any_ambiguous_type); return true; } else { return false; } }
+  public Table anyAmbiguous(Table obj) { int o = __offset(96); return o != 0 ? __union(obj, o) : null; }
 
-  public static void startMonster(FlatBufferBuilder builder) { builder.startObject(43); }
+  public static void startMonster(FlatBufferBuilder builder) { builder.startObject(47); }
   public static void addPos(FlatBufferBuilder builder, int posOffset) { builder.addStruct(0, posOffset, 0); }
   public static void addMana(FlatBufferBuilder builder, short mana) { builder.addShort(1, mana, 150); }
   public static void addHp(FlatBufferBuilder builder, short hp) { builder.addShort(2, hp, 100); }
@@ -223,6 +229,10 @@ public final class Monster extends Table {
   public static void addVectorOfNonOwningReferences(FlatBufferBuilder builder, int vectorOfNonOwningReferencesOffset) { builder.addOffset(42, vectorOfNonOwningReferencesOffset, 0); }
   public static int createVectorOfNonOwningReferencesVector(FlatBufferBuilder builder, long[] data) { builder.startVector(8, data.length, 8); for (int i = data.length - 1; i >= 0; i--) builder.addLong(data[i]); return builder.endVector(); }
   public static void startVectorOfNonOwningReferencesVector(FlatBufferBuilder builder, int numElems) { builder.startVector(8, numElems, 8); }
+  public static void addAnyUniqueType(FlatBufferBuilder builder, byte anyUniqueType) { builder.addByte(43, anyUniqueType, 0); }
+  public static void addAnyUnique(FlatBufferBuilder builder, int anyUniqueOffset) { builder.addOffset(44, anyUniqueOffset, 0); }
+  public static void addAnyAmbiguousType(FlatBufferBuilder builder, byte anyAmbiguousType) { builder.addByte(45, anyAmbiguousType, 0); }
+  public static void addAnyAmbiguous(FlatBufferBuilder builder, int anyAmbiguousOffset) { builder.addOffset(46, anyAmbiguousOffset, 0); }
   public static int endMonster(FlatBufferBuilder builder) {
     int o = builder.endObject();
     builder.required(o, 10);  // name

tests/MyGame/Example/Monster.lua

@@ -477,7 +477,37 @@ function Monster_mt:VectorOfNonOwningReferencesLength()
     end
     return 0
 end
-function Monster.Start(builder) builder:StartObject(43) end
+function Monster_mt:AnyUniqueType()
+    local o = self.view:Offset(90)
+    if o ~= 0 then
+        return self.view:Get(flatbuffers.N.Uint8, o + self.view.pos)
+    end
+    return 0
+end
+function Monster_mt:AnyUnique()
+    local o = self.view:Offset(92)
+    if o ~= 0 then
+        local obj = flatbuffers.view.New(require('flatbuffers.binaryarray').New(0), 0)
+        self.view:Union(obj, o)
+        return obj
+    end
+end
+function Monster_mt:AnyAmbiguousType()
+    local o = self.view:Offset(94)
+    if o ~= 0 then
+        return self.view:Get(flatbuffers.N.Uint8, o + self.view.pos)
+    end
+    return 0
+end
+function Monster_mt:AnyAmbiguous()
+    local o = self.view:Offset(96)
+    if o ~= 0 then
+        local obj = flatbuffers.view.New(require('flatbuffers.binaryarray').New(0), 0)
+        self.view:Union(obj, o)
+        return obj
+    end
+end
+function Monster.Start(builder) builder:StartObject(47) end
 function Monster.AddPos(builder, pos) builder:PrependStructSlot(0, pos, 0) end
 function Monster.AddMana(builder, mana) builder:PrependInt16Slot(1, mana, 150) end
 function Monster.AddHp(builder, hp) builder:PrependInt16Slot(2, hp, 100) end
@@ -537,6 +567,10 @@ function Monster.StartVectorOfCoOwningReferencesVector(builder, numElems) return
 function Monster.AddNonOwningReference(builder, nonOwningReference) builder:PrependUint64Slot(41, nonOwningReference, 0) end
 function Monster.AddVectorOfNonOwningReferences(builder, vectorOfNonOwningReferences) builder:PrependUOffsetTRelativeSlot(42, vectorOfNonOwningReferences, 0) end
 function Monster.StartVectorOfNonOwningReferencesVector(builder, numElems) return builder:StartVector(8, numElems, 8) end
+function Monster.AddAnyUniqueType(builder, anyUniqueType) builder:PrependUint8Slot(43, anyUniqueType, 0) end
+function Monster.AddAnyUnique(builder, anyUnique) builder:PrependUOffsetTRelativeSlot(44, anyUnique, 0) end
+function Monster.AddAnyAmbiguousType(builder, anyAmbiguousType) builder:PrependUint8Slot(45, anyAmbiguousType, 0) end
+function Monster.AddAnyAmbiguous(builder, anyAmbiguous) builder:PrependUOffsetTRelativeSlot(46, anyAmbiguous, 0) end
 function Monster.End(builder) return builder:EndObject() end
 
 return Monster -- return the module
\ No newline at end of file

tests/MyGame/Example/Monster.php

@@ -611,22 +611,58 @@ class Monster extends Table
         return $o != 0 ? $this->__vector_len($o) : 0;
     }
 
+    /**
+     * @return byte
+     */
+    public function getAnyUniqueType()
+    {
+        $o = $this->__offset(90);
+        return $o != 0 ? $this->bb->getByte($o + $this->bb_pos) : \MyGame\Example\AnyUniqueAliases::NONE;
+    }
+
+    /**
+     * @returnint
+     */
+    public function getAnyUnique($obj)
+    {
+        $o = $this->__offset(92);
+        return $o != 0 ? $this->__union($obj, $o) : null;
+    }
+
+    /**
+     * @return byte
+     */
+    public function getAnyAmbiguousType()
+    {
+        $o = $this->__offset(94);
+        return $o != 0 ? $this->bb->getByte($o + $this->bb_pos) : \MyGame\Example\AnyAmbiguousAliases::NONE;
+    }
+
+    /**
+     * @returnint
+     */
+    public function getAnyAmbiguous($obj)
+    {
+        $o = $this->__offset(96);
+        return $o != 0 ? $this->__union($obj, $o) : null;
+    }
+
     /**
      * @param FlatBufferBuilder $builder
      * @return void
      */
     public static function startMonster(FlatBufferBuilder $builder)
     {
-        $builder->StartObject(43);
+        $builder->StartObject(47);
     }
 
     /**
      * @param FlatBufferBuilder $builder
      * @return Monster
      */
-    public static function createMonster(FlatBufferBuilder $builder, $pos, $mana, $hp, $name, $inventory, $color, $test_type, $test, $test4, $testarrayofstring, $testarrayoftables, $enemy, $testnestedflatbuffer, $testempty, $testbool, $testhashs32_fnv1, $testhashu32_fnv1, $testhashs64_fnv1, $testhashu64_fnv1, $testhashs32_fnv1a, $testhashu32_fnv1a, $testhashs64_fnv1a, $testhashu64_fnv1a, $testarrayofbools, $testf, $testf2, $testf3, $testarrayofstring2, $testarrayofsortedstruct, $flex, $test5, $vector_of_longs, $vector_of_doubles, $parent_namespace_test, $vector_of_referrables, $single_weak_reference, $vector_of_weak_references, $vector_of_strong_referrables, $co_owning_reference, $vector_of_co_owning_references, $non_owning_reference, $vector_of_non_owning_references)
+    public static function createMonster(FlatBufferBuilder $builder, $pos, $mana, $hp, $name, $inventory, $color, $test_type, $test, $test4, $testarrayofstring, $testarrayoftables, $enemy, $testnestedflatbuffer, $testempty, $testbool, $testhashs32_fnv1, $testhashu32_fnv1, $testhashs64_fnv1, $testhashu64_fnv1, $testhashs32_fnv1a, $testhashu32_fnv1a, $testhashs64_fnv1a, $testhashu64_fnv1a, $testarrayofbools, $testf, $testf2, $testf3, $testarrayofstring2, $testarrayofsortedstruct, $flex, $test5, $vector_of_longs, $vector_of_doubles, $parent_namespace_test, $vector_of_referrables, $single_weak_reference, $vector_of_weak_references, $vector_of_strong_referrables, $co_owning_reference, $vector_of_co_owning_references, $non_owning_reference, $vector_of_non_owning_references, $any_unique_type, $any_unique, $any_ambiguous_type, $any_ambiguous)
     {
-        $builder->startObject(43);
+        $builder->startObject(47);
         self::addPos($builder, $pos);
         self::addMana($builder, $mana);
         self::addHp($builder, $hp);
@@ -669,6 +705,10 @@ class Monster extends Table
         self::addVectorOfCoOwningReferences($builder, $vector_of_co_owning_references);
         self::addNonOwningReference($builder, $non_owning_reference);
         self::addVectorOfNonOwningReferences($builder, $vector_of_non_owning_references);
+        self::addAnyUniqueType($builder, $any_unique_type);
+        self::addAnyUnique($builder, $any_unique);
+        self::addAnyAmbiguousType($builder, $any_ambiguous_type);
+        self::addAnyAmbiguous($builder, $any_ambiguous);
         $o = $builder->endObject();
         $builder->required($o, 10);  // name
         return $o;
@@ -1497,6 +1537,36 @@ class Monster extends Table
         $builder->startVector(8, $numElems, 8);
     }
 
+    /**
+     * @param FlatBufferBuilder $builder
+     * @param byte
+     * @return void
+     */
+    public static function addAnyUniqueType(FlatBufferBuilder $builder, $anyUniqueType)
+    {
+        $builder->addByteX(43, $anyUniqueType, 0);
+    }
+
+    public static function addAnyUnique(FlatBufferBuilder $builder, $offset)
+    {
+        $builder->addOffsetX(44, $offset, 0);
+    }
+
+    /**
+     * @param FlatBufferBuilder $builder
+     * @param byte
+     * @return void
+     */
+    public static function addAnyAmbiguousType(FlatBufferBuilder $builder, $anyAmbiguousType)
+    {
+        $builder->addByteX(45, $anyAmbiguousType, 0);
+    }
+
+    public static function addAnyAmbiguous(FlatBufferBuilder $builder, $offset)
+    {
+        $builder->addOffsetX(46, $offset, 0);
+    }
+
     /**
      * @param FlatBufferBuilder $builder
      * @return int table offset

tests/MyGame/Example/Monster.py

@@ -560,7 +560,41 @@ class Monster(object):
             return self._tab.VectorLen(o)
         return 0
 
-def MonsterStart(builder): builder.StartObject(43)
+    # Monster
+    def AnyUniqueType(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(90))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Uint8Flags, o + self._tab.Pos)
+        return 0
+
+    # Monster
+    def AnyUnique(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(92))
+        if o != 0:
+            from flatbuffers.table import Table
+            obj = Table(bytearray(), 0)
+            self._tab.Union(obj, o)
+            return obj
+        return None
+
+    # Monster
+    def AnyAmbiguousType(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(94))
+        if o != 0:
+            return self._tab.Get(flatbuffers.number_types.Uint8Flags, o + self._tab.Pos)
+        return 0
+
+    # Monster
+    def AnyAmbiguous(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(96))
+        if o != 0:
+            from flatbuffers.table import Table
+            obj = Table(bytearray(), 0)
+            self._tab.Union(obj, o)
+            return obj
+        return None
+
+def MonsterStart(builder): builder.StartObject(47)
 def MonsterAddPos(builder, pos): builder.PrependStructSlot(0, flatbuffers.number_types.UOffsetTFlags.py_type(pos), 0)
 def MonsterAddMana(builder, mana): builder.PrependInt16Slot(1, mana, 150)
 def MonsterAddHp(builder, hp): builder.PrependInt16Slot(2, hp, 100)
@@ -620,4 +654,8 @@ def MonsterStartVectorOfCoOwningReferencesVector(builder, numElems): return buil
 def MonsterAddNonOwningReference(builder, nonOwningReference): builder.PrependUint64Slot(41, nonOwningReference, 0)
 def MonsterAddVectorOfNonOwningReferences(builder, vectorOfNonOwningReferences): builder.PrependUOffsetTRelativeSlot(42, flatbuffers.number_types.UOffsetTFlags.py_type(vectorOfNonOwningReferences), 0)
 def MonsterStartVectorOfNonOwningReferencesVector(builder, numElems): return builder.StartVector(8, numElems, 8)
+def MonsterAddAnyUniqueType(builder, anyUniqueType): builder.PrependUint8Slot(43, anyUniqueType, 0)
+def MonsterAddAnyUnique(builder, anyUnique): builder.PrependUOffsetTRelativeSlot(44, flatbuffers.number_types.UOffsetTFlags.py_type(anyUnique), 0)
+def MonsterAddAnyAmbiguousType(builder, anyAmbiguousType): builder.PrependUint8Slot(45, anyAmbiguousType, 0)
+def MonsterAddAnyAmbiguous(builder, anyAmbiguous): builder.PrependUOffsetTRelativeSlot(46, flatbuffers.number_types.UOffsetTFlags.py_type(anyAmbiguous), 0)
 def MonsterEnd(builder): return builder.EndObject()

tests/monster_test.fbs

@@ -18,6 +18,9 @@ enum Color:byte (bit_flags) { Red = 0, Green, Blue = 3, }
 
 union Any { Monster, TestSimpleTableWithEnum, MyGame.Example2.Monster }
 
+union AnyUniqueAliases { M: Monster, T: TestSimpleTableWithEnum, M2: MyGame.Example2.Monster }
+union AnyAmbiguousAliases { M1: Monster, M2: Monster, M3: Monster }
+
 struct Test { a:short; b:byte; }
 
 table TestSimpleTableWithEnum (csharp_partial, private) {
@@ -94,6 +97,8 @@ table Monster {
   vector_of_co_owning_references:[ulong](id:40, hash:"fnv1a_64", cpp_type:"ReferrableT", cpp_ptr_type:"default_ptr_type", cpp_ptr_type_get:".get()");  //was shared_ptr
   non_owning_reference:ulong(id:41, hash:"fnv1a_64", cpp_type:"ReferrableT", cpp_ptr_type:"naked", cpp_ptr_type_get:"");                              //was weak_ptr
   vector_of_non_owning_references:[ulong](id:42, hash:"fnv1a_64", cpp_type:"ReferrableT", cpp_ptr_type:"naked", cpp_ptr_type_get:"");                 //was weak_ptr
+  any_unique:AnyUniqueAliases(id:44);
+  any_ambiguous:AnyAmbiguousAliases (id:46);
 }
 
 table TypeAliases {

tests/monster_test.schema.json

@@ -13,6 +13,14 @@
       "type" : "string",
       "enum": ["NONE", "Monster", "TestSimpleTableWithEnum", "MyGame_Example2_Monster"]
     },
+    "MyGame_Example_AnyUniqueAliases" : {
+      "type" : "string",
+      "enum": ["NONE", "M", "T", "M2"]
+    },
+    "MyGame_Example_AnyAmbiguousAliases" : {
+      "type" : "string",
+      "enum": ["NONE", "M1", "M2", "M3"]
+    },
     "MyGame_OtherNameSpace_Unused" : {
       "type" : "object",
       "properties" : {
@@ -143,7 +151,11 @@
         "co_owning_reference" : { "type" : "number" },
         "vector_of_co_owning_references" : { "type" : "array", "items" : { "type" : "number" } },
         "non_owning_reference" : { "type" : "number" },
-        "vector_of_non_owning_references" : { "type" : "array", "items" : { "type" : "number" } }
+        "vector_of_non_owning_references" : { "type" : "array", "items" : { "type" : "number" } },
+        "any_unique_type" : { "$ref" : "#/definitions/MyGame_Example_AnyUniqueAliases" },
+        "any_unique" : { "anyOf": [{ "$ref" : "#/definitions/MyGame_Example_Monster" },{ "$ref" : "#/definitions/MyGame_Example_TestSimpleTableWithEnum" },{ "$ref" : "#/definitions/MyGame_Example2_Monster" }] },
+        "any_ambiguous_type" : { "$ref" : "#/definitions/MyGame_Example_AnyAmbiguousAliases" },
+        "any_ambiguous" : { "anyOf": [{ "$ref" : "#/definitions/MyGame_Example_Monster" },{ "$ref" : "#/definitions/MyGame_Example_Monster" },{ "$ref" : "#/definitions/MyGame_Example_Monster" }] }
       },
       "required" : ["name"],
       "additionalProperties" : false

tests/monster_test_generated.js

@@ -43,6 +43,26 @@ MyGame.Example.Any = {
   MyGame_Example2_Monster: 3, 3: 'MyGame_Example2_Monster'
 };
 
+/**
+ * @enum
+ */
+MyGame.Example.AnyUniqueAliases = {
+  NONE: 0, 0: 'NONE',
+  M: 1, 1: 'M',
+  T: 2, 2: 'T',
+  M2: 3, 3: 'M2'
+};
+
+/**
+ * @enum
+ */
+MyGame.Example.AnyAmbiguousAliases = {
+  NONE: 0, 0: 'NONE',
+  M1: 1, 1: 'M1',
+  M2: 2, 2: 'M2',
+  M3: 3, 3: 'M3'
+};
+
 /**
  * @constructor
  */
@@ -1654,11 +1674,75 @@ MyGame.Example.Monster.prototype.vectorOfNonOwningReferencesLength = function()
   return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
 };
 
+/**
+ * @returns {MyGame.Example.AnyUniqueAliases}
+ */
+MyGame.Example.Monster.prototype.anyUniqueType = function() {
+  var offset = this.bb.__offset(this.bb_pos, 90);
+  return offset ? /** @type {MyGame.Example.AnyUniqueAliases} */ (this.bb.readUint8(this.bb_pos + offset)) : MyGame.Example.AnyUniqueAliases.NONE;
+};
+
+/**
+ * @param {MyGame.Example.AnyUniqueAliases} value
+ * @returns {boolean}
+ */
+MyGame.Example.Monster.prototype.mutate_any_unique_type = function(value) {
+  var offset = this.bb.__offset(this.bb_pos, 90);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb.writeUint8(this.bb_pos + offset, value);
+  return true;
+};
+
+/**
+ * @param {flatbuffers.Table} obj
+ * @returns {?flatbuffers.Table}
+ */
+MyGame.Example.Monster.prototype.anyUnique = function(obj) {
+  var offset = this.bb.__offset(this.bb_pos, 92);
+  return offset ? this.bb.__union(obj, this.bb_pos + offset) : null;
+};
+
+/**
+ * @returns {MyGame.Example.AnyAmbiguousAliases}
+ */
+MyGame.Example.Monster.prototype.anyAmbiguousType = function() {
+  var offset = this.bb.__offset(this.bb_pos, 94);
+  return offset ? /** @type {MyGame.Example.AnyAmbiguousAliases} */ (this.bb.readUint8(this.bb_pos + offset)) : MyGame.Example.AnyAmbiguousAliases.NONE;
+};
+
+/**
+ * @param {MyGame.Example.AnyAmbiguousAliases} value
+ * @returns {boolean}
+ */
+MyGame.Example.Monster.prototype.mutate_any_ambiguous_type = function(value) {
+  var offset = this.bb.__offset(this.bb_pos, 94);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb.writeUint8(this.bb_pos + offset, value);
+  return true;
+};
+
+/**
+ * @param {flatbuffers.Table} obj
+ * @returns {?flatbuffers.Table}
+ */
+MyGame.Example.Monster.prototype.anyAmbiguous = function(obj) {
+  var offset = this.bb.__offset(this.bb_pos, 96);
+  return offset ? this.bb.__union(obj, this.bb_pos + offset) : null;
+};
+
 /**
  * @param {flatbuffers.Builder} builder
  */
 MyGame.Example.Monster.startMonster = function(builder) {
-  builder.startObject(43);
+  builder.startObject(47);
 };
 
 /**
@@ -2315,6 +2399,38 @@ MyGame.Example.Monster.startVectorOfNonOwningReferencesVector = function(builder
   builder.startVector(8, numElems, 8);
 };
 
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {MyGame.Example.AnyUniqueAliases} anyUniqueType
+ */
+MyGame.Example.Monster.addAnyUniqueType = function(builder, anyUniqueType) {
+  builder.addFieldInt8(43, anyUniqueType, MyGame.Example.AnyUniqueAliases.NONE);
+};
+
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {flatbuffers.Offset} anyUniqueOffset
+ */
+MyGame.Example.Monster.addAnyUnique = function(builder, anyUniqueOffset) {
+  builder.addFieldOffset(44, anyUniqueOffset, 0);
+};
+
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {MyGame.Example.AnyAmbiguousAliases} anyAmbiguousType
+ */
+MyGame.Example.Monster.addAnyAmbiguousType = function(builder, anyAmbiguousType) {
+  builder.addFieldInt8(45, anyAmbiguousType, MyGame.Example.AnyAmbiguousAliases.NONE);
+};
+
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {flatbuffers.Offset} anyAmbiguousOffset
+ */
+MyGame.Example.Monster.addAnyAmbiguous = function(builder, anyAmbiguousOffset) {
+  builder.addFieldOffset(46, anyAmbiguousOffset, 0);
+};
+
 /**
  * @param {flatbuffers.Builder} builder
  * @returns {flatbuffers.Offset}

tests/monster_test_generated.lobster

@@ -15,6 +15,18 @@ enum +
     Any_TestSimpleTableWithEnum = 2,
     Any_MyGame_Example2_Monster = 3
 
+enum + 
+    AnyUniqueAliases_NONE = 0,
+    AnyUniqueAliases_M = 1,
+    AnyUniqueAliases_T = 2,
+    AnyUniqueAliases_M2 = 3
+
+enum + 
+    AnyAmbiguousAliases_NONE = 0,
+    AnyAmbiguousAliases_M1 = 1,
+    AnyAmbiguousAliases_M2 = 2,
+    AnyAmbiguousAliases_M3 = 3
+
 namespace MyGame
 
 struct InParentNamespace
@@ -297,11 +309,27 @@ struct Monster : flatbuffers_handle
         buf_.read_int64_le(buf_.flatbuffers_field_vector(pos_, 88) + i * 8)
     def vector_of_non_owning_references_length():
         buf_.flatbuffers_field_vector_len(pos_, 88)
+    def any_unique_type():
+        buf_.flatbuffers_field_int8(pos_, 90, 0)
+    def any_unique_as_M():
+        MyGame_Example_Monster { buf_, buf_.flatbuffers_field_table(pos_, 92) }
+    def any_unique_as_T():
+        MyGame_Example_TestSimpleTableWithEnum { buf_, buf_.flatbuffers_field_table(pos_, 92) }
+    def any_unique_as_M2():
+        MyGame_Example2_Monster { buf_, buf_.flatbuffers_field_table(pos_, 92) }
+    def any_ambiguous_type():
+        buf_.flatbuffers_field_int8(pos_, 94, 0)
+    def any_ambiguous_as_M1():
+        MyGame_Example_Monster { buf_, buf_.flatbuffers_field_table(pos_, 96) }
+    def any_ambiguous_as_M2():
+        MyGame_Example_Monster { buf_, buf_.flatbuffers_field_table(pos_, 96) }
+    def any_ambiguous_as_M3():
+        MyGame_Example_Monster { buf_, buf_.flatbuffers_field_table(pos_, 96) }
 
 def GetRootAsMonster(buf:string): Monster { buf, buf.flatbuffers_indirect(0) }
 
 def MonsterStart(b_:flatbuffers_builder):
-    b_.StartObject(43)
+    b_.StartObject(47)
 def MonsterAddPos(b_:flatbuffers_builder, pos:int):
     b_.PrependStructSlot(0, pos, 0)
 def MonsterAddMana(b_:flatbuffers_builder, mana:int):
@@ -476,6 +504,14 @@ def MonsterCreateVectorOfNonOwningReferencesVector(b_:flatbuffers_builder, v_:[i
     b_.StartVector(8, v_.length, 8)
     reverse(v_) e_: b_.PrependUint64(e_)
     b_.EndVector(v_.length)
+def MonsterAddAnyUniqueType(b_:flatbuffers_builder, any_unique_type:int):
+    b_.PrependUint8Slot(43, any_unique_type, 0)
+def MonsterAddAnyUnique(b_:flatbuffers_builder, any_unique:int):
+    b_.PrependUOffsetTRelativeSlot(44, any_unique, 0)
+def MonsterAddAnyAmbiguousType(b_:flatbuffers_builder, any_ambiguous_type:int):
+    b_.PrependUint8Slot(45, any_ambiguous_type, 0)
+def MonsterAddAnyAmbiguous(b_:flatbuffers_builder, any_ambiguous:int):
+    b_.PrependUOffsetTRelativeSlot(46, any_ambiguous, 0)
 def MonsterEnd(b_:flatbuffers_builder):
     b_.EndObject()
 

tests/monster_test_generated.ts

@@ -21,6 +21,28 @@ export enum Any{
   MyGame_Example2_Monster= 3
 }};
 
+/**
+ * @enum
+ */
+export namespace MyGame.Example{
+export enum AnyUniqueAliases{
+  NONE= 0,
+  M= 1,
+  T= 2,
+  M2= 3
+}};
+
+/**
+ * @enum
+ */
+export namespace MyGame.Example{
+export enum AnyAmbiguousAliases{
+  NONE= 0,
+  M1= 1,
+  M2= 2,
+  M3= 3
+}};
+
 /**
  * @constructor
  */
@@ -1593,11 +1615,75 @@ vectorOfNonOwningReferencesLength():number {
   return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
 };
 
+/**
+ * @returns MyGame.Example.AnyUniqueAliases
+ */
+anyUniqueType():MyGame.Example.AnyUniqueAliases {
+  var offset = this.bb!.__offset(this.bb_pos, 90);
+  return offset ? /**  */ (this.bb!.readUint8(this.bb_pos + offset)) : MyGame.Example.AnyUniqueAliases.NONE;
+};
+
+/**
+ * @param MyGame.Example.AnyUniqueAliases value
+ * @returns boolean
+ */
+mutate_any_unique_type(value:MyGame.Example.AnyUniqueAliases):boolean {
+  var offset = this.bb!.__offset(this.bb_pos, 90);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeUint8(this.bb_pos + offset, value);
+  return true;
+};
+
+/**
+ * @param flatbuffers.Table obj
+ * @returns ?flatbuffers.Table
+ */
+anyUnique<T extends flatbuffers.Table>(obj:T):T|null {
+  var offset = this.bb!.__offset(this.bb_pos, 92);
+  return offset ? this.bb!.__union(obj, this.bb_pos + offset) : null;
+};
+
+/**
+ * @returns MyGame.Example.AnyAmbiguousAliases
+ */
+anyAmbiguousType():MyGame.Example.AnyAmbiguousAliases {
+  var offset = this.bb!.__offset(this.bb_pos, 94);
+  return offset ? /**  */ (this.bb!.readUint8(this.bb_pos + offset)) : MyGame.Example.AnyAmbiguousAliases.NONE;
+};
+
+/**
+ * @param MyGame.Example.AnyAmbiguousAliases value
+ * @returns boolean
+ */
+mutate_any_ambiguous_type(value:MyGame.Example.AnyAmbiguousAliases):boolean {
+  var offset = this.bb!.__offset(this.bb_pos, 94);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeUint8(this.bb_pos + offset, value);
+  return true;
+};
+
+/**
+ * @param flatbuffers.Table obj
+ * @returns ?flatbuffers.Table
+ */
+anyAmbiguous<T extends flatbuffers.Table>(obj:T):T|null {
+  var offset = this.bb!.__offset(this.bb_pos, 96);
+  return offset ? this.bb!.__union(obj, this.bb_pos + offset) : null;
+};
+
 /**
  * @param flatbuffers.Builder builder
  */
 static startMonster(builder:flatbuffers.Builder) {
-  builder.startObject(43);
+  builder.startObject(47);
 };
 
 /**
@@ -2254,6 +2340,38 @@ static startVectorOfNonOwningReferencesVector(builder:flatbuffers.Builder, numEl
   builder.startVector(8, numElems, 8);
 };
 
+/**
+ * @param flatbuffers.Builder builder
+ * @param MyGame.Example.AnyUniqueAliases anyUniqueType
+ */
+static addAnyUniqueType(builder:flatbuffers.Builder, anyUniqueType:MyGame.Example.AnyUniqueAliases) {
+  builder.addFieldInt8(43, anyUniqueType, MyGame.Example.AnyUniqueAliases.NONE);
+};
+
+/**
+ * @param flatbuffers.Builder builder
+ * @param flatbuffers.Offset anyUniqueOffset
+ */
+static addAnyUnique(builder:flatbuffers.Builder, anyUniqueOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(44, anyUniqueOffset, 0);
+};
+
+/**
+ * @param flatbuffers.Builder builder
+ * @param MyGame.Example.AnyAmbiguousAliases anyAmbiguousType
+ */
+static addAnyAmbiguousType(builder:flatbuffers.Builder, anyAmbiguousType:MyGame.Example.AnyAmbiguousAliases) {
+  builder.addFieldInt8(45, anyAmbiguousType, MyGame.Example.AnyAmbiguousAliases.NONE);
+};
+
+/**
+ * @param flatbuffers.Builder builder
+ * @param flatbuffers.Offset anyAmbiguousOffset
+ */
+static addAnyAmbiguous(builder:flatbuffers.Builder, anyAmbiguousOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(46, anyAmbiguousOffset, 0);
+};
+
 /**
  * @param flatbuffers.Builder builder
  * @returns flatbuffers.Offset

tests/union_vector/union_vector_generated.h

@@ -332,7 +332,6 @@ struct Movie FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
   const void *main_character() const {
     return GetPointer<const void *>(VT_MAIN_CHARACTER);
   }
-  template<typename T> const T *main_character_as() const;
   const Attacker *main_character_as_MuLan() const {
     return main_character_type() == Character_MuLan ? static_cast<const Attacker *>(main_character()) : nullptr;
   }