Allow structs to be parsed in JSON with out of order fields.

Also simplified the code and made it faster.

Change-Id: I1d83b1165a4a9a4380d1bfb5538769c012d2d367
Tested: on Linux.

tests/MyGame/Example/Monster.cs

@@ -5,6 +5,7 @@ namespace MyGame.Example
 
 using FlatBuffers;
 
+/// an example documentation comment: monster object
 public sealed class Monster : Table {
   public static Monster GetRootAsMonster(ByteBuffer _bb) { return GetRootAsMonster(_bb, new Monster()); }
   public static Monster GetRootAsMonster(ByteBuffer _bb, Monster obj) { return (obj.__init(_bb.GetInt(_bb.Position) + _bb.Position, _bb)); }

tests/MyGame/Example/Monster.go

@@ -5,6 +5,7 @@ package Example
 import (
 	flatbuffers "github.com/google/flatbuffers/go"
 )
+/// an example documentation comment: monster object
 type Monster struct {
 	_tab flatbuffers.Table
 }

tests/MyGame/Example/Monster.java

@@ -8,6 +8,9 @@ import java.util.*;
 import com.google.flatbuffers.*;
 
 @SuppressWarnings("unused")
+/**
+ * an example documentation comment: monster object
+ */
 public final class Monster extends Table {
   public static Monster getRootAsMonster(ByteBuffer _bb) { return getRootAsMonster(_bb, new Monster()); }
   public static Monster getRootAsMonster(ByteBuffer _bb, Monster obj) { _bb.order(ByteOrder.LITTLE_ENDIAN); return (obj.__init(_bb.getInt(_bb.position()) + _bb.position(), _bb)); }

tests/MyGame/Example/Monster.py

@@ -4,6 +4,7 @@
 
 import flatbuffers
 
+# /// an example documentation comment: monster object
 class Monster(object):
     __slots__ = ['_tab']
 

tests/monster_test_generated.h

@@ -167,6 +167,7 @@ inline flatbuffers::Offset<Stat> CreateStat(flatbuffers::FlatBufferBuilder &_fbb
   return builder_.Finish();
 }
 
+/// an example documentation comment: monster object
 struct Monster FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
   const Vec3 *pos() const { return GetStruct<const Vec3 *>(4); }
   Vec3 *mutable_pos() { return GetStruct<Vec3 *>(4); }

tests/monsterdata_test.json

@@ -29,8 +29,8 @@
       b: 20
     },
     {
-      a: 30,
-      b: 40
+      b: 40,
+      a: 30
     }
   ],
   testarrayofstring: [

tests/test.cpp

@@ -738,7 +738,7 @@ void ErrorTest() {
   TestError("table X { Y:int; } root_type X; { \"Y\":1, }", "string constant",
             true);
   TestError("struct X { Y:int; Z:int; } table W { V:X; } root_type W; "
-            "{ V:{ Y:1 } }", "incomplete");
+            "{ V:{ Y:1 } }", "wrong number");
   TestError("enum E:byte { A } table X { Y:E; } root_type X; { Y:U }",
             "unknown enum value");
   TestError("table X { Y:byte; } root_type X; { Y:; }", "starting");