extended scalar mutator support

.gitignore

@@ -31,10 +31,15 @@ proguard-project.txt
 linklint_results
 Makefile
 flatc
+flatc.exe
 flathash
+flathash.exe
 flattests
+flattests.exe
 flatsamplebinary
+flatsamplebinary.exe
 flatsampletext
+flatsampletext.exe
 snapshot.sh
 tests/go_gen
 tests/monsterdata_java_wire.mon
@@ -50,3 +55,4 @@ java/.idea
 java/*.iml
 java/target
 **/*.pyc
+.idea
\ No newline at end of file

net/FlatBuffers/ByteBuffer.cs

@@ -139,6 +139,12 @@ namespace FlatBuffers
             _pos = offset;
         }
 
+        // this method exists in order to conform with Java ByteBuffer standards
+        public void Put(int offset, byte value)
+        {
+            PutByte(offset, value);
+        }
+
 #if UNSAFE_BYTEBUFFER
         // Unsafe but more efficient versions of Put*.
         public void PutShort(int offset, short value)

src/idl_gen_general.cpp

@@ -434,7 +434,8 @@ static std::string GenSetter(const LanguageParameters &lang,
     case BASE_TYPE_STRUCT: return "";
     default: {
       std::string setter = "bb." + FunctionStart(lang, 'P') + "ut";
-      if (GenTypeBasic(lang, type) != "byte") {
+      if (GenTypeBasic(lang, type) != "byte" && 
+          type.base_type != BASE_TYPE_BOOL) {
         setter += MakeCamel(GenTypeGet(lang, type));
       }
       return setter;
@@ -716,6 +717,8 @@ static void GenStruct(const LanguageParameters &lang, const Parser &parser,
 
     // generate mutators for scalar fields
     if (opts.mutable_buffer) {
+      // boolean parameters have to be explicitly converted to byte representation
+      std::string setter_parameter = field.value.type.base_type == BASE_TYPE_BOOL ? "(byte)(" + field.name + " ? 1 : 0)" : field.name;
       std::string mutator_prefix = MakeCamel("mutate", lang.first_camel_upper);
       if (IsScalar(field.value.type.base_type)) {
         code += "  public ";
@@ -725,11 +728,11 @@ static void GenStruct(const LanguageParameters &lang, const Parser &parser,
         code += " " + field.name + ") { ";
         if (struct_def.fixed) {
           code += GenSetter(lang, field.value.type) + "(bb_pos + ";
-          code += NumToString(field.value.offset) + "); }\n";
+          code += NumToString(field.value.offset) + ", " + setter_parameter + "); }\n";
         } else {
           code += "int o = __offset(" + NumToString(field.value.offset) + ");";
           code += " if (o != 0) { " + GenSetter(lang, field.value.type);
-          code += "(o + bb_pos); return true } else { return false } }\n";
+          code += "(o + bb_pos, " + setter_parameter + "); return true; } else { return false; } }\n";
         }
       }
     }

tests/JavaTest.java

@@ -110,6 +110,31 @@ class JavaTest {
 
         TestEnums();
 
+        //Attempt to mutate Monster fields and check whether the buffer has been mutated properly
+        // revert to original values after testing
+        Monster monster = Monster.getRootAsMonster(fbb.dataBuffer());
+
+        // mana is optional and does not exist in the buffer so the mutation should fail
+        // it should retain its default value
+        TestEq(monster.mutateMana((short)10), false);
+        TestEq(monster.mana(), (short)150);
+
+        // testType is an existing field and mutating it should succeed
+        TestEq(monster.testType(), (byte)Any.Monster);
+        TestEq(monster.mutateTestType(Any.NONE), true);
+        TestEq(monster.testType(), (byte)Any.NONE);
+        TestEq(monster.mutateTestType(Any.Monster), true);
+        TestEq(monster.testType(), (byte)Any.Monster);
+
+        // get a struct field and edit one of its fields
+        // 
+        Vec3 pos = monster.pos();
+        TestEq(pos.x(), 1.0f);
+        pos.mutateX(55.0f);
+        TestEq(pos.x(), 55.0f);
+        pos.mutateX(1.0f);
+        TestEq(pos.x(), 1.0f);
+        
         System.out.println("FlatBuffers test: completed successfully");
     }
 

tests/MyGame/Example/Monster.cs

@@ -14,16 +14,16 @@ public sealed class Monster : Table {
   public Vec3 Pos { get { return GetPos(new Vec3()); } }
   public Vec3 GetPos(Vec3 obj) { int o = __offset(4); return o != 0 ? obj.__init(o + bb_pos, bb) : null; }
   public short Mana { get { int o = __offset(6); return o != 0 ? bb.GetShort(o + bb_pos) : (short)150; } }
-  public bool MutateMana(short mana) { int o = __offset(6); if (o != 0) { bb.PutShort(o + bb_pos); return true } else { return false } }
+  public bool MutateMana(short mana) { int o = __offset(6); if (o != 0) { bb.PutShort(o + bb_pos, mana); return true; } else { return false; } }
   public short Hp { get { int o = __offset(8); return o != 0 ? bb.GetShort(o + bb_pos) : (short)100; } }
-  public bool MutateHp(short hp) { int o = __offset(8); if (o != 0) { bb.PutShort(o + bb_pos); return true } else { return false } }
+  public bool MutateHp(short hp) { int o = __offset(8); if (o != 0) { bb.PutShort(o + bb_pos, hp); return true; } else { return false; } }
   public string Name { get { int o = __offset(10); return o != 0 ? __string(o + bb_pos) : null; } }
   public byte GetInventory(int j) { int o = __offset(14); return o != 0 ? bb.Get(__vector(o) + j * 1) : (byte)0; }
   public int InventoryLength { get { int o = __offset(14); return o != 0 ? __vector_len(o) : 0; } }
   public Color Color { get { int o = __offset(16); return o != 0 ? (Color)bb.GetSbyte(o + bb_pos) : (Color)8; } }
-  public bool MutateColor(sbyte color) { int o = __offset(16); if (o != 0) { bb.PutSbyte(o + bb_pos); return true } else { return false } }
+  public bool MutateColor(sbyte color) { int o = __offset(16); if (o != 0) { bb.PutSbyte(o + bb_pos, color); return true; } else { return false; } }
   public Any TestType { get { int o = __offset(18); return o != 0 ? (Any)bb.Get(o + bb_pos) : (Any)0; } }
-  public bool MutateTestType(byte test_type) { int o = __offset(18); if (o != 0) { bb.Put(o + bb_pos); return true } else { return false } }
+  public bool MutateTestType(byte test_type) { int o = __offset(18); if (o != 0) { bb.Put(o + bb_pos, test_type); return true; } else { return false; } }
   public TTable GetTest<TTable>(TTable obj) where TTable : Table { int o = __offset(20); return o != 0 ? __union(obj, o) : null; }
   public Test GetTest4(int j) { return GetTest4(new Test(), j); }
   public Test GetTest4(Test obj, int j) { int o = __offset(22); return o != 0 ? obj.__init(__vector(o) + j * 4, bb) : null; }
@@ -42,23 +42,23 @@ public sealed class Monster : Table {
   public Stat Testempty { get { return GetTestempty(new Stat()); } }
   public Stat GetTestempty(Stat obj) { int o = __offset(32); return o != 0 ? obj.__init(__indirect(o + bb_pos), bb) : null; }
   public bool Testbool { get { int o = __offset(34); return o != 0 ? 0!=bb.Get(o + bb_pos) : (bool)false; } }
-  public bool MutateTestbool(bool testbool) { int o = __offset(34); if (o != 0) { bb.PutBool(o + bb_pos); return true } else { return false } }
+  public bool MutateTestbool(bool testbool) { int o = __offset(34); if (o != 0) { bb.Put(o + bb_pos, (byte)(testbool ? 1 : 0)); return true; } else { return false; } }
   public int Testhashs32Fnv1 { get { int o = __offset(36); return o != 0 ? bb.GetInt(o + bb_pos) : (int)0; } }
-  public bool MutateTesthashs32Fnv1(int testhashs32_fnv1) { int o = __offset(36); if (o != 0) { bb.PutInt(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashs32Fnv1(int testhashs32_fnv1) { int o = __offset(36); if (o != 0) { bb.PutInt(o + bb_pos, testhashs32_fnv1); return true; } else { return false; } }
   public uint Testhashu32Fnv1 { get { int o = __offset(38); return o != 0 ? bb.GetUint(o + bb_pos) : (uint)0; } }
-  public bool MutateTesthashu32Fnv1(uint testhashu32_fnv1) { int o = __offset(38); if (o != 0) { bb.PutUint(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashu32Fnv1(uint testhashu32_fnv1) { int o = __offset(38); if (o != 0) { bb.PutUint(o + bb_pos, testhashu32_fnv1); return true; } else { return false; } }
   public long Testhashs64Fnv1 { get { int o = __offset(40); return o != 0 ? bb.GetLong(o + bb_pos) : (long)0; } }
-  public bool MutateTesthashs64Fnv1(long testhashs64_fnv1) { int o = __offset(40); if (o != 0) { bb.PutLong(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashs64Fnv1(long testhashs64_fnv1) { int o = __offset(40); if (o != 0) { bb.PutLong(o + bb_pos, testhashs64_fnv1); return true; } else { return false; } }
   public ulong Testhashu64Fnv1 { get { int o = __offset(42); return o != 0 ? bb.GetUlong(o + bb_pos) : (ulong)0; } }
-  public bool MutateTesthashu64Fnv1(ulong testhashu64_fnv1) { int o = __offset(42); if (o != 0) { bb.PutUlong(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashu64Fnv1(ulong testhashu64_fnv1) { int o = __offset(42); if (o != 0) { bb.PutUlong(o + bb_pos, testhashu64_fnv1); return true; } else { return false; } }
   public int Testhashs32Fnv1a { get { int o = __offset(44); return o != 0 ? bb.GetInt(o + bb_pos) : (int)0; } }
-  public bool MutateTesthashs32Fnv1a(int testhashs32_fnv1a) { int o = __offset(44); if (o != 0) { bb.PutInt(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashs32Fnv1a(int testhashs32_fnv1a) { int o = __offset(44); if (o != 0) { bb.PutInt(o + bb_pos, testhashs32_fnv1a); return true; } else { return false; } }
   public uint Testhashu32Fnv1a { get { int o = __offset(46); return o != 0 ? bb.GetUint(o + bb_pos) : (uint)0; } }
-  public bool MutateTesthashu32Fnv1a(uint testhashu32_fnv1a) { int o = __offset(46); if (o != 0) { bb.PutUint(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashu32Fnv1a(uint testhashu32_fnv1a) { int o = __offset(46); if (o != 0) { bb.PutUint(o + bb_pos, testhashu32_fnv1a); return true; } else { return false; } }
   public long Testhashs64Fnv1a { get { int o = __offset(48); return o != 0 ? bb.GetLong(o + bb_pos) : (long)0; } }
-  public bool MutateTesthashs64Fnv1a(long testhashs64_fnv1a) { int o = __offset(48); if (o != 0) { bb.PutLong(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashs64Fnv1a(long testhashs64_fnv1a) { int o = __offset(48); if (o != 0) { bb.PutLong(o + bb_pos, testhashs64_fnv1a); return true; } else { return false; } }
   public ulong Testhashu64Fnv1a { get { int o = __offset(50); return o != 0 ? bb.GetUlong(o + bb_pos) : (ulong)0; } }
-  public bool MutateTesthashu64Fnv1a(ulong testhashu64_fnv1a) { int o = __offset(50); if (o != 0) { bb.PutUlong(o + bb_pos); return true } else { return false } }
+  public bool MutateTesthashu64Fnv1a(ulong testhashu64_fnv1a) { int o = __offset(50); if (o != 0) { bb.PutUlong(o + bb_pos, testhashu64_fnv1a); return true; } else { return false; } }
 
   public static void StartMonster(FlatBufferBuilder builder) { builder.StartObject(24); }
   public static void AddPos(FlatBufferBuilder builder, int posOffset) { builder.AddStruct(0, posOffset, 0); }

tests/MyGame/Example/Monster.java

@@ -16,18 +16,18 @@ public final class Monster extends Table {
   public Vec3 pos() { return pos(new Vec3()); }
   public Vec3 pos(Vec3 obj) { int o = __offset(4); return o != 0 ? obj.__init(o + bb_pos, bb) : null; }
   public short mana() { int o = __offset(6); return o != 0 ? bb.getShort(o + bb_pos) : 150; }
-  public boolean mutateMana(short mana) { int o = __offset(6); if (o != 0) { bb.putShort(o + bb_pos); return true } else { return false } }
+  public boolean mutateMana(short mana) { int o = __offset(6); if (o != 0) { bb.putShort(o + bb_pos, mana); return true; } else { return false; } }
   public short hp() { int o = __offset(8); return o != 0 ? bb.getShort(o + bb_pos) : 100; }
-  public boolean mutateHp(short hp) { int o = __offset(8); if (o != 0) { bb.putShort(o + bb_pos); return true } else { return false } }
+  public boolean mutateHp(short hp) { int o = __offset(8); if (o != 0) { bb.putShort(o + bb_pos, hp); return true; } else { return false; } }
   public String name() { int o = __offset(10); return o != 0 ? __string(o + bb_pos) : null; }
   public ByteBuffer nameAsByteBuffer() { return __vector_as_bytebuffer(10, 1); }
   public int inventory(int j) { int o = __offset(14); return o != 0 ? bb.get(__vector(o) + j * 1) & 0xFF : 0; }
   public int inventoryLength() { int o = __offset(14); return o != 0 ? __vector_len(o) : 0; }
   public ByteBuffer inventoryAsByteBuffer() { return __vector_as_bytebuffer(14, 1); }
   public byte color() { int o = __offset(16); return o != 0 ? bb.get(o + bb_pos) : 8; }
-  public boolean mutateColor(byte color) { int o = __offset(16); if (o != 0) { bb.put(o + bb_pos); return true } else { return false } }
+  public boolean mutateColor(byte color) { int o = __offset(16); if (o != 0) { bb.put(o + bb_pos, color); return true; } else { return false; } }
   public byte testType() { int o = __offset(18); return o != 0 ? bb.get(o + bb_pos) : 0; }
-  public boolean mutateTestType(byte test_type) { int o = __offset(18); if (o != 0) { bb.put(o + bb_pos); return true } else { return false } }
+  public boolean mutateTestType(byte test_type) { int o = __offset(18); if (o != 0) { bb.put(o + bb_pos, test_type); return true; } else { return false; } }
   public Table test(Table obj) { int o = __offset(20); return o != 0 ? __union(obj, o) : null; }
   public Test test4(int j) { return test4(new Test(), j); }
   public Test test4(Test obj, int j) { int o = __offset(22); return o != 0 ? obj.__init(__vector(o) + j * 4, bb) : null; }
@@ -49,23 +49,23 @@ public final class Monster extends Table {
   public Stat testempty() { return testempty(new Stat()); }
   public Stat testempty(Stat obj) { int o = __offset(32); return o != 0 ? obj.__init(__indirect(o + bb_pos), bb) : null; }
   public boolean testbool() { int o = __offset(34); return o != 0 ? 0!=bb.get(o + bb_pos) : false; }
-  public boolean mutateTestbool(boolean testbool) { int o = __offset(34); if (o != 0) { bb.putBoolean(o + bb_pos); return true } else { return false } }
+  public boolean mutateTestbool(boolean testbool) { int o = __offset(34); if (o != 0) { bb.put(o + bb_pos, (byte)(testbool ? 1 : 0)); return true; } else { return false; } }
   public int testhashs32Fnv1() { int o = __offset(36); return o != 0 ? bb.getInt(o + bb_pos) : 0; }
-  public boolean mutateTesthashs32Fnv1(int testhashs32_fnv1) { int o = __offset(36); if (o != 0) { bb.putInt(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashs32Fnv1(int testhashs32_fnv1) { int o = __offset(36); if (o != 0) { bb.putInt(o + bb_pos, testhashs32_fnv1); return true; } else { return false; } }
   public long testhashu32Fnv1() { int o = __offset(38); return o != 0 ? (long)bb.getInt(o + bb_pos) & 0xFFFFFFFFL : 0; }
-  public boolean mutateTesthashu32Fnv1(int testhashu32_fnv1) { int o = __offset(38); if (o != 0) { bb.putInt(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashu32Fnv1(int testhashu32_fnv1) { int o = __offset(38); if (o != 0) { bb.putInt(o + bb_pos, testhashu32_fnv1); return true; } else { return false; } }
   public long testhashs64Fnv1() { int o = __offset(40); return o != 0 ? bb.getLong(o + bb_pos) : 0; }
-  public boolean mutateTesthashs64Fnv1(long testhashs64_fnv1) { int o = __offset(40); if (o != 0) { bb.putLong(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashs64Fnv1(long testhashs64_fnv1) { int o = __offset(40); if (o != 0) { bb.putLong(o + bb_pos, testhashs64_fnv1); return true; } else { return false; } }
   public long testhashu64Fnv1() { int o = __offset(42); return o != 0 ? bb.getLong(o + bb_pos) : 0; }
-  public boolean mutateTesthashu64Fnv1(long testhashu64_fnv1) { int o = __offset(42); if (o != 0) { bb.putLong(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashu64Fnv1(long testhashu64_fnv1) { int o = __offset(42); if (o != 0) { bb.putLong(o + bb_pos, testhashu64_fnv1); return true; } else { return false; } }
   public int testhashs32Fnv1a() { int o = __offset(44); return o != 0 ? bb.getInt(o + bb_pos) : 0; }
-  public boolean mutateTesthashs32Fnv1a(int testhashs32_fnv1a) { int o = __offset(44); if (o != 0) { bb.putInt(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashs32Fnv1a(int testhashs32_fnv1a) { int o = __offset(44); if (o != 0) { bb.putInt(o + bb_pos, testhashs32_fnv1a); return true; } else { return false; } }
   public long testhashu32Fnv1a() { int o = __offset(46); return o != 0 ? (long)bb.getInt(o + bb_pos) & 0xFFFFFFFFL : 0; }
-  public boolean mutateTesthashu32Fnv1a(int testhashu32_fnv1a) { int o = __offset(46); if (o != 0) { bb.putInt(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashu32Fnv1a(int testhashu32_fnv1a) { int o = __offset(46); if (o != 0) { bb.putInt(o + bb_pos, testhashu32_fnv1a); return true; } else { return false; } }
   public long testhashs64Fnv1a() { int o = __offset(48); return o != 0 ? bb.getLong(o + bb_pos) : 0; }
-  public boolean mutateTesthashs64Fnv1a(long testhashs64_fnv1a) { int o = __offset(48); if (o != 0) { bb.putLong(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashs64Fnv1a(long testhashs64_fnv1a) { int o = __offset(48); if (o != 0) { bb.putLong(o + bb_pos, testhashs64_fnv1a); return true; } else { return false; } }
   public long testhashu64Fnv1a() { int o = __offset(50); return o != 0 ? bb.getLong(o + bb_pos) : 0; }
-  public boolean mutateTesthashu64Fnv1a(long testhashu64_fnv1a) { int o = __offset(50); if (o != 0) { bb.putLong(o + bb_pos); return true } else { return false } }
+  public boolean mutateTesthashu64Fnv1a(long testhashu64_fnv1a) { int o = __offset(50); if (o != 0) { bb.putLong(o + bb_pos, testhashu64_fnv1a); return true; } else { return false; } }
 
   public static void startMonster(FlatBufferBuilder builder) { builder.startObject(24); }
   public static void addPos(FlatBufferBuilder builder, int posOffset) { builder.addStruct(0, posOffset, 0); }

tests/MyGame/Example/Stat.cs

@@ -12,9 +12,9 @@ public sealed class Stat : Table {
 
   public string Id { get { int o = __offset(4); return o != 0 ? __string(o + bb_pos) : null; } }
   public long Val { get { int o = __offset(6); return o != 0 ? bb.GetLong(o + bb_pos) : (long)0; } }
-  public bool MutateVal(long val) { int o = __offset(6); if (o != 0) { bb.PutLong(o + bb_pos); return true } else { return false } }
+  public bool MutateVal(long val) { int o = __offset(6); if (o != 0) { bb.PutLong(o + bb_pos, val); return true; } else { return false; } }
   public ushort Count { get { int o = __offset(8); return o != 0 ? bb.GetUshort(o + bb_pos) : (ushort)0; } }
-  public bool MutateCount(ushort count) { int o = __offset(8); if (o != 0) { bb.PutUshort(o + bb_pos); return true } else { return false } }
+  public bool MutateCount(ushort count) { int o = __offset(8); if (o != 0) { bb.PutUshort(o + bb_pos, count); return true; } else { return false; } }
 
   public static int CreateStat(FlatBufferBuilder builder,
       int id = 0,

tests/MyGame/Example/Stat.java

@@ -15,9 +15,9 @@ public final class Stat extends Table {
   public String id() { int o = __offset(4); return o != 0 ? __string(o + bb_pos) : null; }
   public ByteBuffer idAsByteBuffer() { return __vector_as_bytebuffer(4, 1); }
   public long val() { int o = __offset(6); return o != 0 ? bb.getLong(o + bb_pos) : 0; }
-  public boolean mutateVal(long val) { int o = __offset(6); if (o != 0) { bb.putLong(o + bb_pos); return true } else { return false } }
+  public boolean mutateVal(long val) { int o = __offset(6); if (o != 0) { bb.putLong(o + bb_pos, val); return true; } else { return false; } }
   public int count() { int o = __offset(8); return o != 0 ? bb.getShort(o + bb_pos) & 0xFFFF : 0; }
-  public boolean mutateCount(short count) { int o = __offset(8); if (o != 0) { bb.putShort(o + bb_pos); return true } else { return false } }
+  public boolean mutateCount(short count) { int o = __offset(8); if (o != 0) { bb.putShort(o + bb_pos, count); return true; } else { return false; } }
 
   public static int createStat(FlatBufferBuilder builder,
       int id,

tests/MyGame/Example/Test.cs

@@ -9,9 +9,9 @@ public sealed class Test : Struct {
   public Test __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; return this; }
 
   public short A { get { return bb.GetShort(bb_pos + 0); } }
-  public void MutateA(short a) { bb.PutShort(bb_pos + 0); }
+  public void MutateA(short a) { bb.PutShort(bb_pos + 0, a); }
   public sbyte B { get { return bb.GetSbyte(bb_pos + 2); } }
-  public void MutateB(sbyte b) { bb.PutSbyte(bb_pos + 2); }
+  public void MutateB(sbyte b) { bb.PutSbyte(bb_pos + 2, b); }
 
   public static int CreateTest(FlatBufferBuilder builder, short A, sbyte B) {
     builder.Prep(2, 4);

tests/MyGame/Example/Test.java

@@ -11,9 +11,9 @@ public final class Test extends Struct {
   public Test __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; return this; }
 
   public short a() { return bb.getShort(bb_pos + 0); }
-  public void mutateA(short a) { bb.putShort(bb_pos + 0); }
+  public void mutateA(short a) { bb.putShort(bb_pos + 0, a); }
   public byte b() { return bb.get(bb_pos + 2); }
-  public void mutateB(byte b) { bb.put(bb_pos + 2); }
+  public void mutateB(byte b) { bb.put(bb_pos + 2, b); }
 
   public static int createTest(FlatBufferBuilder builder, short a, byte b) {
     builder.prep(2, 4);

tests/MyGame/Example/Vec3.cs

@@ -9,15 +9,15 @@ public sealed class Vec3 : Struct {
   public Vec3 __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; return this; }
 
   public float X { get { return bb.GetFloat(bb_pos + 0); } }
-  public void MutateX(float x) { bb.PutFloat(bb_pos + 0); }
+  public void MutateX(float x) { bb.PutFloat(bb_pos + 0, x); }
   public float Y { get { return bb.GetFloat(bb_pos + 4); } }
-  public void MutateY(float y) { bb.PutFloat(bb_pos + 4); }
+  public void MutateY(float y) { bb.PutFloat(bb_pos + 4, y); }
   public float Z { get { return bb.GetFloat(bb_pos + 8); } }
-  public void MutateZ(float z) { bb.PutFloat(bb_pos + 8); }
+  public void MutateZ(float z) { bb.PutFloat(bb_pos + 8, z); }
   public double Test1 { get { return bb.GetDouble(bb_pos + 16); } }
-  public void MutateTest1(double test1) { bb.PutDouble(bb_pos + 16); }
+  public void MutateTest1(double test1) { bb.PutDouble(bb_pos + 16, test1); }
   public Color Test2 { get { return (Color)bb.GetSbyte(bb_pos + 24); } }
-  public void MutateTest2(sbyte test2) { bb.PutSbyte(bb_pos + 24); }
+  public void MutateTest2(sbyte test2) { bb.PutSbyte(bb_pos + 24, test2); }
   public Test Test3 { get { return GetTest3(new Test()); } }
   public Test GetTest3(Test obj) { return obj.__init(bb_pos + 26, bb); }
 

tests/MyGame/Example/Vec3.java

@@ -11,15 +11,15 @@ public final class Vec3 extends Struct {
   public Vec3 __init(int _i, ByteBuffer _bb) { bb_pos = _i; bb = _bb; return this; }
 
   public float x() { return bb.getFloat(bb_pos + 0); }
-  public void mutateX(float x) { bb.putFloat(bb_pos + 0); }
+  public void mutateX(float x) { bb.putFloat(bb_pos + 0, x); }
   public float y() { return bb.getFloat(bb_pos + 4); }
-  public void mutateY(float y) { bb.putFloat(bb_pos + 4); }
+  public void mutateY(float y) { bb.putFloat(bb_pos + 4, y); }
   public float z() { return bb.getFloat(bb_pos + 8); }
-  public void mutateZ(float z) { bb.putFloat(bb_pos + 8); }
+  public void mutateZ(float z) { bb.putFloat(bb_pos + 8, z); }
   public double test1() { return bb.getDouble(bb_pos + 16); }
-  public void mutateTest1(double test1) { bb.putDouble(bb_pos + 16); }
+  public void mutateTest1(double test1) { bb.putDouble(bb_pos + 16, test1); }
   public byte test2() { return bb.get(bb_pos + 24); }
-  public void mutateTest2(byte test2) { bb.put(bb_pos + 24); }
+  public void mutateTest2(byte test2) { bb.put(bb_pos + 24, test2); }
   public Test test3() { return test3(new Test()); }
   public Test test3(Test obj) { return obj.__init(bb_pos + 26, bb); }