Emit GetRootAs methods for all types in Go and Python

src/idl_gen_go.cpp

@@ -509,13 +509,12 @@ static void GenTableBuilders(const StructDef &struct_def,
 
 // Generate struct or table methods.
 static void GenStruct(const StructDef &struct_def,
-                      std::string *code_ptr,
+                      std::string *code_ptr) {
-                      StructDef *root_struct_def) {
   if (struct_def.generated) return;
 
   GenComment(struct_def.doc_comment, code_ptr, nullptr);
   BeginClass(struct_def, code_ptr);
-  if (&struct_def == root_struct_def) {
+  if (!struct_def.fixed) {
     // Generate a special accessor for the table that has been declared as
     // the root type.
     NewRootTypeFromBuffer(struct_def, code_ptr);
@@ -637,7 +636,7 @@ class GoGenerator : public BaseGenerator {
     for (auto it = parser_.structs_.vec.begin();
          it != parser_.structs_.vec.end(); ++it) {
       std::string declcode;
-      go::GenStruct(**it, &declcode, parser_.root_struct_def_);
+      go::GenStruct(**it, &declcode);
       if (!SaveType(**it, declcode, true)) return false;
     }
 

src/idl_gen_python.cpp

@@ -94,7 +94,7 @@ static void NewRootTypeFromBuffer(const StructDef &struct_def,
   code += Indent + Indent + "x = " + struct_def.name + "()\n";
   code += Indent + Indent + "x.Init(buf, n + offset)\n";
   code += Indent + Indent + "return x\n";
-  code += "\n\n";
+  code += "\n";
 }
 
 // Initialize an existing object with other data, to avoid an allocation.
@@ -478,13 +478,12 @@ static void GenTableBuilders(const StructDef &struct_def,
 
 // Generate struct or table methods.
 static void GenStruct(const StructDef &struct_def,
-                      std::string *code_ptr,
+                      std::string *code_ptr) {
-                      StructDef *root_struct_def) {
   if (struct_def.generated) return;
 
   GenComment(struct_def.doc_comment, code_ptr, nullptr, "# ");
   BeginClass(struct_def, code_ptr);
-  if (&struct_def == root_struct_def) {
+  if (!struct_def.fixed) {
     // Generate a special accessor for the table that has been declared as
     // the root type.
     NewRootTypeFromBuffer(struct_def, code_ptr);
@@ -620,7 +619,7 @@ class PythonGenerator : public BaseGenerator {
          it != parser_.structs_.vec.end(); ++it) {
       auto &struct_def = **it;
       std::string declcode;
-      GenStruct(struct_def, &declcode, parser_.root_struct_def_);
+      GenStruct(struct_def, &declcode);
       if (!SaveType(struct_def, declcode, true)) return false;
     }
     return true;

tests/MyGame/Example/Monster.py

@@ -15,7 +15,6 @@ class Monster(object):
         x.Init(buf, n + offset)
         return x
 
-
     # Monster
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)

tests/MyGame/Example/Stat.go

@@ -9,6 +9,13 @@ type Stat struct {
 	_tab flatbuffers.Table
 }
 
+func GetRootAsStat(buf []byte, offset flatbuffers.UOffsetT) *Stat {
+	n := flatbuffers.GetUOffsetT(buf[offset:])
+	x := &Stat{}
+	x.Init(buf, n + offset)
+	return x
+}
+
 func (rcv *Stat) Init(buf []byte, i flatbuffers.UOffsetT) {
 	rcv._tab.Bytes = buf
 	rcv._tab.Pos = i

tests/MyGame/Example/Stat.py

@@ -7,6 +7,13 @@ import flatbuffers
 class Stat(object):
     __slots__ = ['_tab']
 
+    @classmethod
+    def GetRootAsStat(cls, buf, offset):
+        n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
+        x = Stat()
+        x.Init(buf, n + offset)
+        return x
+
     # Stat
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)

tests/MyGame/Example/TestSimpleTableWithEnum.go

@@ -9,6 +9,13 @@ type TestSimpleTableWithEnum struct {
 	_tab flatbuffers.Table
 }
 
+func GetRootAsTestSimpleTableWithEnum(buf []byte, offset flatbuffers.UOffsetT) *TestSimpleTableWithEnum {
+	n := flatbuffers.GetUOffsetT(buf[offset:])
+	x := &TestSimpleTableWithEnum{}
+	x.Init(buf, n + offset)
+	return x
+}
+
 func (rcv *TestSimpleTableWithEnum) Init(buf []byte, i flatbuffers.UOffsetT) {
 	rcv._tab.Bytes = buf
 	rcv._tab.Pos = i

tests/MyGame/Example/TestSimpleTableWithEnum.py

@@ -7,6 +7,13 @@ import flatbuffers
 class TestSimpleTableWithEnum(object):
     __slots__ = ['_tab']
 
+    @classmethod
+    def GetRootAsTestSimpleTableWithEnum(cls, buf, offset):
+        n = flatbuffers.encode.Get(flatbuffers.packer.uoffset, buf, offset)
+        x = TestSimpleTableWithEnum()
+        x.Init(buf, n + offset)
+        return x
+
     # TestSimpleTableWithEnum
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)