Convenient createX methods for TS (#5044)

package.json

@@ -2,7 +2,10 @@
   "name": "flatbuffers",
   "version": "1.10.2",
   "description": "Memory Efficient Serialization Library",
-  "files": ["js/flatbuffers.js", "js/flatbuffers.mjs"],
+  "files": [
+    "js/flatbuffers.js",
+    "js/flatbuffers.mjs"
+  ],
   "main": "js/flatbuffers",
   "module": "js/flatbuffers.mjs",
   "directories": {
@@ -26,5 +29,6 @@
   "bugs": {
     "url": "https://github.com/google/flatbuffers/issues"
   },
-  "homepage": "https://google.github.io/flatbuffers/"
+  "homepage": "https://google.github.io/flatbuffers/",
+  "dependencies": {}
 }

src/idl_gen_js.cpp

@@ -1118,8 +1118,7 @@ class JsGenerator : public BaseGenerator {
            it != struct_def.fields.vec.end(); ++it) {
         auto &field = **it;
         if (field.deprecated) continue;
-        auto argname = MakeCamel(field.name, false);
-        if (!IsScalar(field.value.type.base_type)) { argname += "Offset"; }
+        const auto argname = GetArgName(field);
 
         // Generate the field insertion method
         GenDocComment(
@@ -1129,16 +1128,8 @@ class JsGenerator : public BaseGenerator {
                                   argname, false));
 
         if (lang_.language == IDLOptions::kTs) {
-          std::string argType;
-          if (field.value.type.enum_def) {
-            argType = GenPrefixedTypeName(GenTypeName(field.value.type, true),
-                                          field.value.type.enum_def->file);
-          } else {
-            argType = GenTypeName(field.value.type, true);
-          }
-
           code += "static add" + MakeCamel(field.name);
-          code += "(builder:flatbuffers.Builder, " + argname + ":" + argType +
+          code += "(builder:flatbuffers.Builder, " + argname + ":" + GetArgType(field) +
                   ") {\n";
         } else {
           code += object_name + ".add" + MakeCamel(field.name);
@@ -1268,6 +1259,35 @@ class JsGenerator : public BaseGenerator {
         code += ");\n";
         code += "};\n\n";
       }
+
+      if (lang_.language == IDLOptions::kTs) {
+          // Generate a convenient CreateX function
+          code += "static create" + struct_def.name + "(builder:flatbuffers.Builder";
+          for (auto it = struct_def.fields.vec.begin();
+               it != struct_def.fields.vec.end(); ++it) {
+            const auto &field = **it;
+            if (field.deprecated)
+              continue;
+
+            code += ", " + GetArgName(field) + ":" + GetArgType(field);
+          }
+
+          code += "):flatbuffers.Offset {\n";
+          code += "  " + struct_def.name + ".start" + struct_def.name + "(builder);\n";
+
+          for (auto it = struct_def.fields.vec.begin();
+               it != struct_def.fields.vec.end(); ++it) {
+              const auto &field = **it;
+              if (field.deprecated)
+                continue;
+
+              code += "  " + struct_def.name + ".add" + MakeCamel(field.name) +"(";
+              code += "builder, " + GetArgName(field) + ");\n";
+          }
+
+          code += "  return " + struct_def.name + ".end" + struct_def.name + "(builder);\n";
+          code += "}\n";
+      }
     }
 
     if (lang_.language == IDLOptions::kTs) {
@@ -1275,6 +1295,20 @@ class JsGenerator : public BaseGenerator {
       code += "}\n";
     }
   }
+
+  std::string GetArgType(const FieldDef &field) {
+    if (field.value.type.enum_def)
+      return GenPrefixedTypeName(GenTypeName(field.value.type, true),
+                                 field.value.type.enum_def->file);
+    return GenTypeName(field.value.type, true);
+  }
+
+  static std::string GetArgName(const FieldDef &field) {
+      auto argname = MakeCamel(field.name, false);
+      if (!IsScalar(field.value.type.base_type)) { argname += "Offset"; }
+
+      return argname;
+  }
 };
 }  // namespace js
 

tests/monster_test_generated.ts

@@ -87,6 +87,10 @@ static endInParentNamespace(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createInParentNamespace(builder:flatbuffers.Builder):flatbuffers.Offset {
+  InParentNamespace.startInParentNamespace(builder);
+  return InParentNamespace.endInParentNamespace(builder);
+}
 }
 }
 /**
@@ -133,6 +137,10 @@ static endMonster(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createMonster(builder:flatbuffers.Builder):flatbuffers.Offset {
+  Monster.startMonster(builder);
+  return Monster.endMonster(builder);
+}
 }
 }
 /**
@@ -289,6 +297,11 @@ static endTestSimpleTableWithEnum(builder:flatbuffers.Builder):flatbuffers.Offse
   return offset;
 };
 
+static createTestSimpleTableWithEnum(builder:flatbuffers.Builder, color:MyGame.Example.Color):flatbuffers.Offset {
+  TestSimpleTableWithEnum.startTestSimpleTableWithEnum(builder);
+  TestSimpleTableWithEnum.addColor(builder, color);
+  return TestSimpleTableWithEnum.endTestSimpleTableWithEnum(builder);
+}
 }
 }
 /**
@@ -661,6 +674,13 @@ static endStat(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createStat(builder:flatbuffers.Builder, idOffset:flatbuffers.Offset, val:flatbuffers.Long, count:number):flatbuffers.Offset {
+  Stat.startStat(builder);
+  Stat.addId(builder, idOffset);
+  Stat.addVal(builder, val);
+  Stat.addCount(builder, count);
+  return Stat.endStat(builder);
+}
 }
 }
 /**
@@ -738,6 +758,11 @@ static endReferrable(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createReferrable(builder:flatbuffers.Builder, id:flatbuffers.Long):flatbuffers.Offset {
+  Referrable.startReferrable(builder);
+  Referrable.addId(builder, id);
+  return Referrable.endReferrable(builder);
+}
 }
 }
 /**
@@ -2444,6 +2469,57 @@ static finishMonsterBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offse
   builder.finish(offset, 'MONS');
 };
 
+static createMonster(builder:flatbuffers.Builder, posOffset:flatbuffers.Offset, mana:number, hp:number, nameOffset:flatbuffers.Offset, inventoryOffset:flatbuffers.Offset, color:MyGame.Example.Color, testType:MyGame.Example.Any, testOffset:flatbuffers.Offset, test4Offset:flatbuffers.Offset, testarrayofstringOffset:flatbuffers.Offset, testarrayoftablesOffset:flatbuffers.Offset, enemyOffset:flatbuffers.Offset, testnestedflatbufferOffset:flatbuffers.Offset, testemptyOffset:flatbuffers.Offset, testbool:boolean, testhashs32Fnv1:number, testhashu32Fnv1:number, testhashs64Fnv1:flatbuffers.Long, testhashu64Fnv1:flatbuffers.Long, testhashs32Fnv1a:number, testhashu32Fnv1a:number, testhashs64Fnv1a:flatbuffers.Long, testhashu64Fnv1a:flatbuffers.Long, testarrayofboolsOffset:flatbuffers.Offset, testf:number, testf2:number, testf3:number, testarrayofstring2Offset:flatbuffers.Offset, testarrayofsortedstructOffset:flatbuffers.Offset, flexOffset:flatbuffers.Offset, test5Offset:flatbuffers.Offset, vectorOfLongsOffset:flatbuffers.Offset, vectorOfDoublesOffset:flatbuffers.Offset, parentNamespaceTestOffset:flatbuffers.Offset, vectorOfReferrablesOffset:flatbuffers.Offset, singleWeakReference:flatbuffers.Long, vectorOfWeakReferencesOffset:flatbuffers.Offset, vectorOfStrongReferrablesOffset:flatbuffers.Offset, coOwningReference:flatbuffers.Long, vectorOfCoOwningReferencesOffset:flatbuffers.Offset, nonOwningReference:flatbuffers.Long, vectorOfNonOwningReferencesOffset:flatbuffers.Offset, anyUniqueType:MyGame.Example.AnyUniqueAliases, anyUniqueOffset:flatbuffers.Offset, anyAmbiguousType:MyGame.Example.AnyAmbiguousAliases, anyAmbiguousOffset:flatbuffers.Offset, vectorOfEnumsOffset:flatbuffers.Offset):flatbuffers.Offset {
+  Monster.startMonster(builder);
+  Monster.addPos(builder, posOffset);
+  Monster.addMana(builder, mana);
+  Monster.addHp(builder, hp);
+  Monster.addName(builder, nameOffset);
+  Monster.addInventory(builder, inventoryOffset);
+  Monster.addColor(builder, color);
+  Monster.addTestType(builder, testType);
+  Monster.addTest(builder, testOffset);
+  Monster.addTest4(builder, test4Offset);
+  Monster.addTestarrayofstring(builder, testarrayofstringOffset);
+  Monster.addTestarrayoftables(builder, testarrayoftablesOffset);
+  Monster.addEnemy(builder, enemyOffset);
+  Monster.addTestnestedflatbuffer(builder, testnestedflatbufferOffset);
+  Monster.addTestempty(builder, testemptyOffset);
+  Monster.addTestbool(builder, testbool);
+  Monster.addTesthashs32Fnv1(builder, testhashs32Fnv1);
+  Monster.addTesthashu32Fnv1(builder, testhashu32Fnv1);
+  Monster.addTesthashs64Fnv1(builder, testhashs64Fnv1);
+  Monster.addTesthashu64Fnv1(builder, testhashu64Fnv1);
+  Monster.addTesthashs32Fnv1a(builder, testhashs32Fnv1a);
+  Monster.addTesthashu32Fnv1a(builder, testhashu32Fnv1a);
+  Monster.addTesthashs64Fnv1a(builder, testhashs64Fnv1a);
+  Monster.addTesthashu64Fnv1a(builder, testhashu64Fnv1a);
+  Monster.addTestarrayofbools(builder, testarrayofboolsOffset);
+  Monster.addTestf(builder, testf);
+  Monster.addTestf2(builder, testf2);
+  Monster.addTestf3(builder, testf3);
+  Monster.addTestarrayofstring2(builder, testarrayofstring2Offset);
+  Monster.addTestarrayofsortedstruct(builder, testarrayofsortedstructOffset);
+  Monster.addFlex(builder, flexOffset);
+  Monster.addTest5(builder, test5Offset);
+  Monster.addVectorOfLongs(builder, vectorOfLongsOffset);
+  Monster.addVectorOfDoubles(builder, vectorOfDoublesOffset);
+  Monster.addParentNamespaceTest(builder, parentNamespaceTestOffset);
+  Monster.addVectorOfReferrables(builder, vectorOfReferrablesOffset);
+  Monster.addSingleWeakReference(builder, singleWeakReference);
+  Monster.addVectorOfWeakReferences(builder, vectorOfWeakReferencesOffset);
+  Monster.addVectorOfStrongReferrables(builder, vectorOfStrongReferrablesOffset);
+  Monster.addCoOwningReference(builder, coOwningReference);
+  Monster.addVectorOfCoOwningReferences(builder, vectorOfCoOwningReferencesOffset);
+  Monster.addNonOwningReference(builder, nonOwningReference);
+  Monster.addVectorOfNonOwningReferences(builder, vectorOfNonOwningReferencesOffset);
+  Monster.addAnyUniqueType(builder, anyUniqueType);
+  Monster.addAnyUnique(builder, anyUniqueOffset);
+  Monster.addAnyAmbiguousType(builder, anyAmbiguousType);
+  Monster.addAnyAmbiguous(builder, anyAmbiguousOffset);
+  Monster.addVectorOfEnums(builder, vectorOfEnumsOffset);
+  return Monster.endMonster(builder);
+}
 }
 }
 /**
@@ -2908,5 +2984,21 @@ static endTypeAliases(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createTypeAliases(builder:flatbuffers.Builder, i8:number, u8:number, i16:number, u16:number, i32:number, u32:number, i64:flatbuffers.Long, u64:flatbuffers.Long, f32:number, f64:number, v8Offset:flatbuffers.Offset, vf64Offset:flatbuffers.Offset):flatbuffers.Offset {
+  TypeAliases.startTypeAliases(builder);
+  TypeAliases.addI8(builder, i8);
+  TypeAliases.addU8(builder, u8);
+  TypeAliases.addI16(builder, i16);
+  TypeAliases.addU16(builder, u16);
+  TypeAliases.addI32(builder, i32);
+  TypeAliases.addU32(builder, u32);
+  TypeAliases.addI64(builder, i64);
+  TypeAliases.addU64(builder, u64);
+  TypeAliases.addF32(builder, f32);
+  TypeAliases.addF64(builder, f64);
+  TypeAliases.addV8(builder, v8Offset);
+  TypeAliases.addVf64(builder, vf64Offset);
+  return TypeAliases.endTypeAliases(builder);
+}
 }
 }

tests/namespace_test/namespace_test1_generated.ts

@@ -85,6 +85,11 @@ static endTableInNestedNS(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createTableInNestedNS(builder:flatbuffers.Builder, foo:number):flatbuffers.Offset {
+  TableInNestedNS.startTableInNestedNS(builder);
+  TableInNestedNS.addFoo(builder, foo);
+  return TableInNestedNS.endTableInNestedNS(builder);
+}
 }
 }
 /**

tests/namespace_test/namespace_test2_generated.ts

@@ -110,6 +110,13 @@ static endTableInFirstNS(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createTableInFirstNS(builder:flatbuffers.Builder, fooTableOffset:flatbuffers.Offset, fooEnum:NS8755221360535654258.NamespaceA.NamespaceB.EnumInNestedNS, fooStructOffset:flatbuffers.Offset):flatbuffers.Offset {
+  TableInFirstNS.startTableInFirstNS(builder);
+  TableInFirstNS.addFooTable(builder, fooTableOffset);
+  TableInFirstNS.addFooEnum(builder, fooEnum);
+  TableInFirstNS.addFooStruct(builder, fooStructOffset);
+  return TableInFirstNS.endTableInFirstNS(builder);
+}
 }
 }
 /**
@@ -190,6 +197,12 @@ static endTableInC(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createTableInC(builder:flatbuffers.Builder, referToA1Offset:flatbuffers.Offset, referToA2Offset:flatbuffers.Offset):flatbuffers.Offset {
+  TableInC.startTableInC(builder);
+  TableInC.addReferToA1(builder, referToA1Offset);
+  TableInC.addReferToA2(builder, referToA2Offset);
+  return TableInC.endTableInC(builder);
+}
 }
 }
 /**
@@ -253,5 +266,10 @@ static endSecondTableInA(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createSecondTableInA(builder:flatbuffers.Builder, referToCOffset:flatbuffers.Offset):flatbuffers.Offset {
+  SecondTableInA.startSecondTableInA(builder);
+  SecondTableInA.addReferToC(builder, referToCOffset);
+  return SecondTableInA.endSecondTableInA(builder);
+}
 }
 }

tests/union_vector/union_vector_generated.ts

@@ -87,6 +87,11 @@ static endAttacker(builder:flatbuffers.Builder):flatbuffers.Offset {
   return offset;
 };
 
+static createAttacker(builder:flatbuffers.Builder, swordAttackDamage:number):flatbuffers.Offset {
+  Attacker.startAttacker(builder);
+  Attacker.addSwordAttackDamage(builder, swordAttackDamage);
+  return Attacker.endAttacker(builder);
+}
 }
 /**
  * @constructor
@@ -400,4 +405,12 @@ static finishMovieBuffer(builder:flatbuffers.Builder, offset:flatbuffers.Offset)
   builder.finish(offset, 'MOVI');
 };
 
+static createMovie(builder:flatbuffers.Builder, mainCharacterType:Character, mainCharacterOffset:flatbuffers.Offset, charactersTypeOffset:flatbuffers.Offset, charactersOffset:flatbuffers.Offset):flatbuffers.Offset {
+  Movie.startMovie(builder);
+  Movie.addMainCharacterType(builder, mainCharacterType);
+  Movie.addMainCharacter(builder, mainCharacterOffset);
+  Movie.addCharactersType(builder, charactersTypeOffset);
+  Movie.addCharacters(builder, charactersOffset);
+  return Movie.endMovie(builder);
+}
 }