Added additional convenience overloads to CreateVector().

Bug: 29337887, 29336299
Change-Id: Iad8b3b2263f6cea7ee7e45994369194960df293b
Tested: on Linux.

docs/source/Tutorial.md

@@ -790,6 +790,14 @@ offsets.
 ~~~
 </div>
 
+<div class="language-cpp">
+<br>
+Note there's additional convenience overloads of `CreateVector`, allowing you
+to work with data that's not in a `std::vector`, or allowing you to generate
+elements by calling a lambda. For the common case of `std::vector<std::string>`
+there's also `CreateVectorOfStrings`.
+</div>
+
 To create a `struct`, use the `Vec3` class/struct that was generated by
 the schema compiler:
 
@@ -1075,7 +1083,7 @@ Here is a repetition these lines, to help highlight them more clearly:
 <div class="language-c">
 ~~~{.c}
   // Add union type and data simultanously.
-  ns(Monster_equipped_Weapon_add(B, axe)); 
+  ns(Monster_equipped_Weapon_add(B, axe));
 ~~~
 </div>
 

include/flatbuffers/flatbuffers.h

@@ -36,16 +36,17 @@
     (!defined(_MSC_VER) || _MSC_VER < 1600) && \
     (!defined(__GNUC__) || \
       (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ < 40400))
-  #error A C++11 compatible compiler with support for the auto typing is required for FlatBuffers.
+  #error A C++11 compatible compiler with support for the auto typing is \
+         required for FlatBuffers.
   #error __cplusplus _MSC_VER __GNUC__  __GNUC_MINOR__  __GNUC_PATCHLEVEL__
 #endif
 
 #if !defined(__clang__) && \
     defined(__GNUC__) && \
     (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__ < 40600)
-  // Backwards compatability for g++ 4.4, and 4.5 which don't have the nullptr and constexpr
-  // keywords. Note the __clang__ check is needed, because clang presents itself as an older GNUC
-  // compiler.
+  // Backwards compatability for g++ 4.4, and 4.5 which don't have the nullptr
+  // and constexpr keywords. Note the __clang__ check is needed, because clang
+  // presents itself as an older GNUC compiler.
   #ifndef nullptr_t
     const class nullptr_t {
     public:
@@ -983,6 +984,33 @@ FLATBUFFERS_FINAL_CLASS
     return CreateVector(v.data(), v.size());
   }
 
+  /// @brief Serialize values returned by a function into a FlatBuffer `vector`.
+  /// This is a convenience function that takes care of iteration for you.
+  /// @tparam T The data type of the `std::vector` elements.
+  /// @param f A function that takes the current iteration 0..vector_size-1 and
+  /// returns any type that you can construct a FlatBuffers vector out of.
+  /// @return Returns a typed `Offset` into the serialized data indicating
+  /// where the vector is stored.
+  template<typename T> Offset<Vector<T>> CreateVector(size_t vector_size,
+      const std::function<T (size_t i)> &f) {
+    std::vector<T> elems(vector_size);
+    for (size_t i = 0; i < vector_size; i++) elems[i] = f(i);
+    return CreateVector(elems.data(), elems.size());
+  }
+
+  /// @brief Serialize a `std::vector<std::string>` into a FlatBuffer `vector`.
+  /// This is a convenience function for a common case.
+  /// @param v A const reference to the `std::vector` to serialize into the
+  /// buffer as a `vector`.
+  /// @return Returns a typed `Offset` into the serialized data indicating
+  /// where the vector is stored.
+  Offset<Vector<Offset<String>>> CreateVectorOfStrings(
+      const std::vector<std::string> &v) {
+    std::vector<Offset<String>> offsets(v.size());
+    for (size_t i = 0; i < v.size(); i++) offsets[i] = CreateString(v[i]);
+    return CreateVector(offsets.data(), offsets.size());
+  }
+
   /// @brief Serialize an array of structs into a FlatBuffer `vector`.
   /// @tparam T The data type of the struct array elements.
   /// @param[in] v A pointer to the array of type `T` to serialize into the
@@ -991,7 +1019,7 @@ FLATBUFFERS_FINAL_CLASS
   /// @return Returns a typed `Offset` into the serialized data indicating
   /// where the vector is stored.
   template<typename T> Offset<Vector<const T *>> CreateVectorOfStructs(
-                                                       const T *v, size_t len) {
+      const T *v, size_t len) {
     StartVector(len * sizeof(T) / AlignOf<T>(), AlignOf<T>());
     PushBytes(reinterpret_cast<const uint8_t *>(v), sizeof(T) * len);
     return Offset<Vector<const T *>>(EndVector(len));
@@ -1004,7 +1032,7 @@ FLATBUFFERS_FINAL_CLASS
   /// @return Returns a typed `Offset` into the serialized data indicating
   /// where the vector is stored.
   template<typename T> Offset<Vector<const T *>> CreateVectorOfStructs(
-                                                      const std::vector<T> &v) {
+      const std::vector<T> &v) {
     return CreateVectorOfStructs(v.data(), v.size());
   }
 
@@ -1033,7 +1061,7 @@ FLATBUFFERS_FINAL_CLASS
   /// @return Returns a typed `Offset` into the serialized data indicating
   /// where the vector is stored.
   template<typename T> Offset<Vector<Offset<T>>> CreateVectorOfSortedTables(
-                                                     Offset<T> *v, size_t len) {
+      Offset<T> *v, size_t len) {
     std::sort(v, v + len, TableKeyComparator<T>(buf_));
     return CreateVector(v, len);
   }
@@ -1046,7 +1074,7 @@ FLATBUFFERS_FINAL_CLASS
   /// @return Returns a typed `Offset` into the serialized data indicating
   /// where the vector is stored.
   template<typename T> Offset<Vector<Offset<T>>> CreateVectorOfSortedTables(
-                                                    std::vector<Offset<T>> *v) {
+      std::vector<Offset<T>> *v) {
     return CreateVectorOfSortedTables(v->data(), v->size());
   }
 
@@ -1077,7 +1105,7 @@ FLATBUFFERS_FINAL_CLASS
   /// written to at a later time to serialize the data into a `vector`
   /// in the buffer.
   template<typename T> Offset<Vector<T>> CreateUninitializedVector(
-                                                    size_t len, T **buf) {
+      size_t len, T **buf) {
     return CreateUninitializedVector(len, sizeof(T),
                                      reinterpret_cast<uint8_t **>(buf));
   }
@@ -1162,13 +1190,16 @@ template<typename T> const T *GetRoot(const void *buf) {
 }
 
 /// Helpers to get a typed pointer to objects that are currently beeing built.
-/// @warning Creating new objects will lead to reallocations and invalidates the pointer!
-template<typename T> T *GetMutableTemporaryPointer(FlatBufferBuilder &fbb, Offset<T> offset) {
+/// @warning Creating new objects will lead to reallocations and invalidates
+/// the pointer!
+template<typename T> T *GetMutableTemporaryPointer(FlatBufferBuilder &fbb,
+                                                   Offset<T> offset) {
   return reinterpret_cast<T *>(fbb.GetCurrentBufferPointer() +
     fbb.GetSize() - offset.o);
 }
 
-template<typename T> const T *GetTemporaryPointer(FlatBufferBuilder &fbb, Offset<T> offset) {
+template<typename T> const T *GetTemporaryPointer(FlatBufferBuilder &fbb,
+                                                  Offset<T> offset) {
   return GetMutableTemporaryPointer<T>(fbb, offset);
 }
 

tests/MyGame/Example/Monster.cs

@@ -78,8 +78,10 @@ public sealed class Monster : Table {
   public bool MutateTestf2(float testf2) { int o = __offset(56); if (o != 0) { bb.PutFloat(o + bb_pos, testf2); return true; } else { return false; } }
   public float Testf3 { get { int o = __offset(58); return o != 0 ? bb.GetFloat(o + bb_pos) : (float)0.0f; } }
   public bool MutateTestf3(float testf3) { int o = __offset(58); if (o != 0) { bb.PutFloat(o + bb_pos, testf3); return true; } else { return false; } }
+  public string GetTestarrayofstring2(int j) { int o = __offset(60); return o != 0 ? __string(__vector(o) + j * 4) : null; }
+  public int Testarrayofstring2Length { get { int o = __offset(60); return o != 0 ? __vector_len(o) : 0; } }
 
-  public static void StartMonster(FlatBufferBuilder builder) { builder.StartObject(28); }
+  public static void StartMonster(FlatBufferBuilder builder) { builder.StartObject(29); }
   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); }
@@ -118,6 +120,9 @@ public sealed class Monster : Table {
   public static void AddTestf(FlatBufferBuilder builder, float testf) { builder.AddFloat(25, testf, 3.14159f); }
   public static void AddTestf2(FlatBufferBuilder builder, float testf2) { builder.AddFloat(26, testf2, 3.0f); }
   public static void AddTestf3(FlatBufferBuilder builder, float testf3) { builder.AddFloat(27, testf3, 0.0f); }
+  public static void AddTestarrayofstring2(FlatBufferBuilder builder, VectorOffset testarrayofstring2Offset) { builder.AddOffset(28, testarrayofstring2Offset.Value, 0); }
+  public static VectorOffset CreateTestarrayofstring2Vector(FlatBufferBuilder builder, StringOffset[] data) { builder.StartVector(4, data.Length, 4); for (int i = data.Length - 1; i >= 0; i--) builder.AddOffset(data[i].Value); return builder.EndVector(); }
+  public static void StartTestarrayofstring2Vector(FlatBufferBuilder builder, int numElems) { builder.StartVector(4, numElems, 4); }
   public static Offset<Monster> EndMonster(FlatBufferBuilder builder) {
     int o = builder.EndObject();
     builder.Required(o, 10);  // name

tests/MyGame/Example/Monster.go

@@ -337,7 +337,24 @@ func (rcv *Monster) Testf3() float32 {
 	return 0.0
 }
 
-func MonsterStart(builder *flatbuffers.Builder) { builder.StartObject(28) }
+func (rcv *Monster) Testarrayofstring2(j int) []byte {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(60))
+	if o != 0 {
+		a := rcv._tab.Vector(o)
+		return rcv._tab.ByteVector(a + flatbuffers.UOffsetT(j * 4))
+	}
+	return nil
+}
+
+func (rcv *Monster) Testarrayofstring2Length() int {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(60))
+	if o != 0 {
+		return rcv._tab.VectorLen(o)
+	}
+	return 0
+}
+
+func MonsterStart(builder *flatbuffers.Builder) { builder.StartObject(29) }
 func MonsterAddPos(builder *flatbuffers.Builder, pos flatbuffers.UOffsetT) { builder.PrependStructSlot(0, flatbuffers.UOffsetT(pos), 0) }
 func MonsterAddMana(builder *flatbuffers.Builder, mana int16) { builder.PrependInt16Slot(1, mana, 150) }
 func MonsterAddHp(builder *flatbuffers.Builder, hp int16) { builder.PrependInt16Slot(2, hp, 100) }
@@ -377,4 +394,7 @@ func MonsterStartTestarrayofboolsVector(builder *flatbuffers.Builder, numElems i
 func MonsterAddTestf(builder *flatbuffers.Builder, testf float32) { builder.PrependFloat32Slot(25, testf, 3.14159) }
 func MonsterAddTestf2(builder *flatbuffers.Builder, testf2 float32) { builder.PrependFloat32Slot(26, testf2, 3.0) }
 func MonsterAddTestf3(builder *flatbuffers.Builder, testf3 float32) { builder.PrependFloat32Slot(27, testf3, 0.0) }
+func MonsterAddTestarrayofstring2(builder *flatbuffers.Builder, testarrayofstring2 flatbuffers.UOffsetT) { builder.PrependUOffsetTSlot(28, flatbuffers.UOffsetT(testarrayofstring2), 0) }
+func MonsterStartTestarrayofstring2Vector(builder *flatbuffers.Builder, numElems int) flatbuffers.UOffsetT { return builder.StartVector(4, numElems, 4)
+}
 func MonsterEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT { return builder.EndObject() }

tests/MyGame/Example/Monster.java

@@ -84,8 +84,10 @@ public final class Monster extends Table {
   public boolean mutateTestf2(float testf2) { int o = __offset(56); if (o != 0) { bb.putFloat(o + bb_pos, testf2); return true; } else { return false; } }
   public float testf3() { int o = __offset(58); return o != 0 ? bb.getFloat(o + bb_pos) : 0.0f; }
   public boolean mutateTestf3(float testf3) { int o = __offset(58); if (o != 0) { bb.putFloat(o + bb_pos, testf3); return true; } else { return false; } }
+  public String testarrayofstring2(int j) { int o = __offset(60); return o != 0 ? __string(__vector(o) + j * 4) : null; }
+  public int testarrayofstring2Length() { int o = __offset(60); return o != 0 ? __vector_len(o) : 0; }
 
-  public static void startMonster(FlatBufferBuilder builder) { builder.startObject(28); }
+  public static void startMonster(FlatBufferBuilder builder) { builder.startObject(29); }
   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); }
@@ -124,6 +126,9 @@ public final class Monster extends Table {
   public static void addTestf(FlatBufferBuilder builder, float testf) { builder.addFloat(25, testf, 3.14159f); }
   public static void addTestf2(FlatBufferBuilder builder, float testf2) { builder.addFloat(26, testf2, 3.0f); }
   public static void addTestf3(FlatBufferBuilder builder, float testf3) { builder.addFloat(27, testf3, 0.0f); }
+  public static void addTestarrayofstring2(FlatBufferBuilder builder, int testarrayofstring2Offset) { builder.addOffset(28, testarrayofstring2Offset, 0); }
+  public static int createTestarrayofstring2Vector(FlatBufferBuilder builder, int[] data) { builder.startVector(4, data.length, 4); for (int i = data.length - 1; i >= 0; i--) builder.addOffset(data[i]); return builder.endVector(); }
+  public static void startTestarrayofstring2Vector(FlatBufferBuilder builder, int numElems) { builder.startVector(4, numElems, 4); }
   public static int endMonster(FlatBufferBuilder builder) {
     int o = builder.endObject();
     builder.required(o, 10);  // name

tests/MyGame/Example/Monster.php

@@ -360,22 +360,41 @@ class Monster extends Table
         return $o != 0 ? $this->bb->getFloat($o + $this->bb_pos) : 0.0;
     }
 
+    /**
+     * @param int offset
+     * @return string
+     */
+    public function getTestarrayofstring2($j)
+    {
+        $o = $this->__offset(60);
+        return $o != 0 ? $this->__string($this->__vector($o) + $j * 4) : 0;
+    }
+
+    /**
+     * @return int
+     */
+    public function getTestarrayofstring2Length()
+    {
+        $o = $this->__offset(60);
+        return $o != 0 ? $this->__vector_len($o) : 0;
+    }
+
     /**
      * @param FlatBufferBuilder $builder
      * @return void
      */
     public static function startMonster(FlatBufferBuilder $builder)
     {
-        $builder->StartObject(28);
+        $builder->StartObject(29);
     }
 
     /**
      * @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)
+    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)
     {
-        $builder->startObject(28);
+        $builder->startObject(29);
         self::addPos($builder, $pos);
         self::addMana($builder, $mana);
         self::addHp($builder, $hp);
@@ -403,6 +422,7 @@ class Monster extends Table
         self::addTestf($builder, $testf);
         self::addTestf2($builder, $testf2);
         self::addTestf3($builder, $testf3);
+        self::addTestarrayofstring2($builder, $testarrayofstring2);
         $o = $builder->endObject();
         $builder->required($o, 10);  // name
         return $o;
@@ -817,6 +837,40 @@ class Monster extends Table
         $builder->addFloatX(27, $testf3, 0.0);
     }
 
+    /**
+     * @param FlatBufferBuilder $builder
+     * @param VectorOffset
+     * @return void
+     */
+    public static function addTestarrayofstring2(FlatBufferBuilder $builder, $testarrayofstring2)
+    {
+        $builder->addOffsetX(28, $testarrayofstring2, 0);
+    }
+
+    /**
+     * @param FlatBufferBuilder $builder
+     * @param array offset array
+     * @return int vector offset
+     */
+    public static function createTestarrayofstring2Vector(FlatBufferBuilder $builder, array $data)
+    {
+        $builder->startVector(4, count($data), 4);
+        for ($i = count($data) - 1; $i >= 0; $i--) {
+            $builder->addOffset($data[$i]);
+        }
+        return $builder->endVector();
+    }
+
+    /**
+     * @param FlatBufferBuilder $builder
+     * @param int $numElems
+     * @return void
+     */
+    public static function startTestarrayofstring2Vector(FlatBufferBuilder $builder, $numElems)
+    {
+        $builder->startVector(4, $numElems, 4);
+    }
+
     /**
      * @param FlatBufferBuilder $builder
      * @return int table offset

tests/MyGame/Example/Monster.py

@@ -283,7 +283,22 @@ class Monster(object):
             return self._tab.Get(flatbuffers.number_types.Float32Flags, o + self._tab.Pos)
         return 0.0
 
-def MonsterStart(builder): builder.StartObject(28)
+    # Monster
+    def Testarrayofstring2(self, j):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(60))
+        if o != 0:
+            a = self._tab.Vector(o)
+            return self._tab.String(a + flatbuffers.number_types.UOffsetTFlags.py_type(j * 4))
+        return ""
+
+    # Monster
+    def Testarrayofstring2Length(self):
+        o = flatbuffers.number_types.UOffsetTFlags.py_type(self._tab.Offset(60))
+        if o != 0:
+            return self._tab.VectorLen(o)
+        return 0
+
+def MonsterStart(builder): builder.StartObject(29)
 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)
@@ -317,4 +332,6 @@ def MonsterStartTestarrayofboolsVector(builder, numElems): return builder.StartV
 def MonsterAddTestf(builder, testf): builder.PrependFloat32Slot(25, testf, 3.14159)
 def MonsterAddTestf2(builder, testf2): builder.PrependFloat32Slot(26, testf2, 3.0)
 def MonsterAddTestf3(builder, testf3): builder.PrependFloat32Slot(27, testf3, 0.0)
+def MonsterAddTestarrayofstring2(builder, testarrayofstring2): builder.PrependUOffsetTRelativeSlot(28, flatbuffers.number_types.UOffsetTFlags.py_type(testarrayofstring2), 0)
+def MonsterStartTestarrayofstring2Vector(builder, numElems): return builder.StartVector(4, numElems, 4)
 def MonsterEnd(builder): return builder.EndObject()

tests/monster_test.fbs

@@ -44,6 +44,7 @@ table Monster {
   /// multiline too
   testarrayoftables:[Monster] (id: 11);
   testarrayofstring:[string] (id: 10);
+  testarrayofstring2:[string] (id: 28);
   testarrayofbools:[bool] (id: 24);
   enemy:MyGame.Example.Monster (id:12);  // Test referring by full namespace.
   test:Any (id: 8);

tests/monster_test_generated.h

@@ -22,8 +22,8 @@ enum Color {
   Color_Red = 1,
   Color_Green = 2,
   Color_Blue = 8,
-  Color_MIN = Color_Red,
-  Color_MAX = Color_Blue
+  Color_NONE = 0,
+  Color_ANY = 11
 };
 
 inline const char **EnumNamesColor() {
@@ -206,7 +206,8 @@ struct Monster FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
     VT_TESTARRAYOFBOOLS = 52,
     VT_TESTF = 54,
     VT_TESTF2 = 56,
-    VT_TESTF3 = 58
+    VT_TESTF3 = 58,
+    VT_TESTARRAYOFSTRING2 = 60
   };
   const Vec3 *pos() const { return GetStruct<const Vec3 *>(VT_POS); }
   Vec3 *mutable_pos() { return GetStruct<Vec3 *>(VT_POS); }
@@ -267,6 +268,8 @@ struct Monster FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
   bool mutate_testf2(float _testf2) { return SetField(VT_TESTF2, _testf2); }
   float testf3() const { return GetField<float>(VT_TESTF3, 0.0f); }
   bool mutate_testf3(float _testf3) { return SetField(VT_TESTF3, _testf3); }
+  const flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *testarrayofstring2() const { return GetPointer<const flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *>(VT_TESTARRAYOFSTRING2); }
+  flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *mutable_testarrayofstring2() { return GetPointer<flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *>(VT_TESTARRAYOFSTRING2); }
   bool Verify(flatbuffers::Verifier &verifier) const {
     return VerifyTableStart(verifier) &&
            VerifyField<Vec3>(verifier, VT_POS) &&
@@ -308,6 +311,9 @@ struct Monster FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
            VerifyField<float>(verifier, VT_TESTF) &&
            VerifyField<float>(verifier, VT_TESTF2) &&
            VerifyField<float>(verifier, VT_TESTF3) &&
+           VerifyField<flatbuffers::uoffset_t>(verifier, VT_TESTARRAYOFSTRING2) &&
+           verifier.Verify(testarrayofstring2()) &&
+           verifier.VerifyVectorOfStrings(testarrayofstring2()) &&
            verifier.EndTable();
   }
 };
@@ -342,10 +348,11 @@ struct MonsterBuilder {
   void add_testf(float testf) { fbb_.AddElement<float>(Monster::VT_TESTF, testf, 3.14159f); }
   void add_testf2(float testf2) { fbb_.AddElement<float>(Monster::VT_TESTF2, testf2, 3.0f); }
   void add_testf3(float testf3) { fbb_.AddElement<float>(Monster::VT_TESTF3, testf3, 0.0f); }
+  void add_testarrayofstring2(flatbuffers::Offset<flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>>> testarrayofstring2) { fbb_.AddOffset(Monster::VT_TESTARRAYOFSTRING2, testarrayofstring2); }
   MonsterBuilder(flatbuffers::FlatBufferBuilder &_fbb) : fbb_(_fbb) { start_ = fbb_.StartTable(); }
   MonsterBuilder &operator=(const MonsterBuilder &);
   flatbuffers::Offset<Monster> Finish() {
-    auto o = flatbuffers::Offset<Monster>(fbb_.EndTable(start_, 28));
+    auto o = flatbuffers::Offset<Monster>(fbb_.EndTable(start_, 29));
     fbb_.Required(o, Monster::VT_NAME);  // name
     return o;
   }
@@ -378,12 +385,14 @@ inline flatbuffers::Offset<Monster> CreateMonster(flatbuffers::FlatBufferBuilder
    flatbuffers::Offset<flatbuffers::Vector<uint8_t>> testarrayofbools = 0,
    float testf = 3.14159f,
    float testf2 = 3.0f,
-   float testf3 = 0.0f) {
+   float testf3 = 0.0f,
+   flatbuffers::Offset<flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>>> testarrayofstring2 = 0) {
   MonsterBuilder builder_(_fbb);
   builder_.add_testhashu64_fnv1a(testhashu64_fnv1a);
   builder_.add_testhashs64_fnv1a(testhashs64_fnv1a);
   builder_.add_testhashu64_fnv1(testhashu64_fnv1);
   builder_.add_testhashs64_fnv1(testhashs64_fnv1);
+  builder_.add_testarrayofstring2(testarrayofstring2);
   builder_.add_testf3(testf3);
   builder_.add_testf2(testf2);
   builder_.add_testf(testf);

tests/monster_test_generated.js

@@ -701,11 +701,29 @@ MyGame.Example.Monster.prototype.testf3 = function() {
   return offset ? this.bb.readFloat32(this.bb_pos + offset) : 0.0;
 };
 
+/**
+ * @param {number} index
+ * @param {flatbuffers.Encoding=} optionalEncoding
+ * @returns {string|Uint8Array}
+ */
+MyGame.Example.Monster.prototype.testarrayofstring2 = function(index, optionalEncoding) {
+  var offset = this.bb.__offset(this.bb_pos, 60);
+  return offset ? this.bb.__string(this.bb.__vector(this.bb_pos + offset) + index * 4, optionalEncoding) : null;
+};
+
+/**
+ * @returns {number}
+ */
+MyGame.Example.Monster.prototype.testarrayofstring2Length = function() {
+  var offset = this.bb.__offset(this.bb_pos, 60);
+  return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
+};
+
 /**
  * @param {flatbuffers.Builder} builder
  */
 MyGame.Example.Monster.startMonster = function(builder) {
-  builder.startObject(28);
+  builder.startObject(29);
 };
 
 /**
@@ -1037,6 +1055,35 @@ MyGame.Example.Monster.addTestf3 = function(builder, testf3) {
   builder.addFieldFloat32(27, testf3, 0.0);
 };
 
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {flatbuffers.Offset} testarrayofstring2Offset
+ */
+MyGame.Example.Monster.addTestarrayofstring2 = function(builder, testarrayofstring2Offset) {
+  builder.addFieldOffset(28, testarrayofstring2Offset, 0);
+};
+
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {Array.<flatbuffers.Offset>} data
+ * @returns {flatbuffers.Offset}
+ */
+MyGame.Example.Monster.createTestarrayofstring2Vector = function(builder, data) {
+  builder.startVector(4, data.length, 4);
+  for (var i = data.length - 1; i >= 0; i--) {
+    builder.addOffset(data[i]);
+  }
+  return builder.endVector();
+};
+
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {number} numElems
+ */
+MyGame.Example.Monster.startTestarrayofstring2Vector = function(builder, numElems) {
+  builder.startVector(4, numElems, 4);
+};
+
 /**
  * @param {flatbuffers.Builder} builder
  * @returns {flatbuffers.Offset}

tests/test.cpp

@@ -114,13 +114,17 @@ flatbuffers::unique_ptr_t CreateFlatBufferTest(std::string &buffer) {
   mb3.add_name(wilma);
   mlocs[2] = mb3.Finish();
 
-  // Create an array of strings. Also test string pooling.
-  flatbuffers::Offset<flatbuffers::String> strings[4];
-  strings[0] = builder.CreateSharedString("bob");
-  strings[1] = builder.CreateSharedString("fred");
-  strings[2] = builder.CreateSharedString("bob");
-  strings[3] = builder.CreateSharedString("fred");
-  auto vecofstrings = builder.CreateVector(strings, 4);
+  // Create an array of strings. Also test string pooling, and lambdas.
+  const char *names[] = { "bob", "fred", "bob", "fred" };
+  auto vecofstrings =
+      builder.CreateVector<flatbuffers::Offset<flatbuffers::String>>(4,
+        [&](size_t i) {
+    return builder.CreateSharedString(names[i]);
+  });
+
+  // Creating vectors of strings in one convenient call.
+  std::vector<std::string> names2 = { "jane", "mary" };
+  auto vecofstrings2 = builder.CreateVectorOfStrings(names2);
 
   // Create an array of sorted tables, can be used with binary search when read:
   auto vecoftables = builder.CreateVectorOfSortedTables(mlocs, 3);
@@ -128,7 +132,9 @@ flatbuffers::unique_ptr_t CreateFlatBufferTest(std::string &buffer) {
   // shortcut for creating monster with all fields set:
   auto mloc = CreateMonster(builder, &vec, 150, 80, name, inventory, Color_Blue,
                             Any_Monster, mlocs[1].Union(), // Store a union.
-                            testv, vecofstrings, vecoftables, 0);
+                            testv, vecofstrings, vecoftables, 0, 0, 0, false,
+                            0, 0, 0, 0, 0, 0, 0, 0, 0, 3.14159f, 3.0f, 0.0f,
+                            vecofstrings2);
 
   FinishMonsterBuffer(builder, mloc);
 
@@ -198,6 +204,13 @@ void AccessFlatBufferTest(const uint8_t *flatbuf, size_t length) {
   TEST_EQ(vecofstrings->Get(0)->c_str(), vecofstrings->Get(2)->c_str());
   TEST_EQ(vecofstrings->Get(1)->c_str(), vecofstrings->Get(3)->c_str());
 
+  auto vecofstrings2 = monster->testarrayofstring2();
+  if (vecofstrings2) {
+    TEST_EQ(vecofstrings2->Length(), 2U);
+    TEST_EQ_STR(vecofstrings2->Get(0)->c_str(), "jane");
+    TEST_EQ_STR(vecofstrings2->Get(1)->c_str(), "mary");
+  }
+
   // Example of accessing a vector of tables:
   auto vecoftables = monster->testarrayoftables();
   TEST_EQ(vecoftables->Length(), 3U);