2019-12-24 03:13:48 +07:00
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/*
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* Copyright 2014 Google Inc. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// This is a sandbox for modeling C++17 code generator.
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2021-07-25 18:20:34 +09:00
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// C++17 code generator: "flatc --cpp-std c++17".
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2019-12-24 03:13:48 +07:00
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// Warning:
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// This is an experimental feature and could change at any time.
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#include "flatbuffers/flatbuffers.h"
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2022-04-05 16:29:42 -07:00
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#include "flatbuffers/flex_flat_util.h"
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2019-12-24 03:13:48 +07:00
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#include "flatbuffers/flexbuffers.h"
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#include "flatbuffers/idl.h"
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#include "flatbuffers/minireflect.h"
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#include "flatbuffers/registry.h"
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#include "flatbuffers/util.h"
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#include "stringify_util.h"
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2019-12-24 03:13:48 +07:00
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#include "test_assert.h"
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// Embed generated code into an isolated namespace.
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namespace cpp17 {
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#include "generated_cpp17/monster_test_generated.h"
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2020-09-19 02:51:17 +07:00
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#include "generated_cpp17/optional_scalars_generated.h"
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2021-07-25 18:20:34 +09:00
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#include "generated_cpp17/union_vector_generated.h"
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2019-12-24 03:13:48 +07:00
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} // namespace cpp17
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namespace cpp11 {
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#include "../monster_test_generated.h"
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2020-09-19 02:51:17 +07:00
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#include "../optional_scalars_generated.h"
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2019-12-24 03:13:48 +07:00
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} // namespace cpp11
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2021-03-05 13:01:40 -05:00
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using ::cpp17::MyGame::Example::Monster;
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using ::cpp17::MyGame::Example::Vec3;
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/*******************************************************************************
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** Build some FB objects.
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*******************************************************************************/
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2022-08-17 01:48:41 +08:00
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namespace {
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const Monster* BuildMonster(flatbuffers::FlatBufferBuilder& fbb) {
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using ::cpp17::MyGame::Example::Color;
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using ::cpp17::MyGame::Example::MonsterBuilder;
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using ::cpp17::MyGame::Example::Test;
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auto name = fbb.CreateString("my_monster");
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auto inventory = fbb.CreateVector(std::vector<uint8_t>{4, 5, 6, 7});
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MonsterBuilder builder(fbb);
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auto vec3 = Vec3{/*x=*/1.1f,
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/*y=*/2.2f,
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/*z=*/3.3f,
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/*test1=*/6.6,
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/*test2=*/Color::Green,
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/*test3=*/
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Test(
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/*a=*/11,
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/*b=*/90)};
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builder.add_pos(&vec3);
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builder.add_name(name);
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builder.add_mana(1);
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builder.add_hp(2);
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builder.add_testbool(true);
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builder.add_testhashs32_fnv1(4);
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builder.add_testhashu32_fnv1(5);
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builder.add_testhashs64_fnv1(6);
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builder.add_testhashu64_fnv1(7);
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builder.add_testhashs32_fnv1a(8);
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builder.add_testhashu32_fnv1a(9);
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builder.add_testhashs64_fnv1a(10);
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builder.add_testhashu64_fnv1a(11);
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builder.add_testf(12.1f);
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builder.add_testf2(13.1f);
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builder.add_testf3(14.1f);
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builder.add_single_weak_reference(15);
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builder.add_co_owning_reference(16);
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builder.add_non_owning_reference(17);
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builder.add_inventory(inventory);
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fbb.Finish(builder.Finish());
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const Monster* monster =
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flatbuffers::GetRoot<Monster>(fbb.GetBufferPointer());
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return monster;
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}
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/*******************************************************************************
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** Test Case: Static Field Reflection Traits for Table & Structs.
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*******************************************************************************/
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// This test tests & demonstrates the power of the static reflection. Using it,
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// we can given any Flatbuffer type to a generic function and it will be able to
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// produce is full recursive string representation of it.
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//
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// This test covers all types: primitive types, structs, tables, Vectors, etc.
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//
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void StringifyAnyFlatbuffersTypeTest() {
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flatbuffers::FlatBufferBuilder fbb;
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// We are using a Monster here, but we could have used any type, because the
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// code that follows is totally generic!
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const auto* monster = BuildMonster(fbb);
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std::string expected = R"(MyGame.Example.Monster{
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pos = MyGame.Example.Vec3{
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x = 1.1
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y = 2.2
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z = 3.3
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test1 = 6.6
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test2 = 2
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test3 = MyGame.Example.Test{
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a = 11
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b = 90
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}
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}
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mana = 1
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hp = 2
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name = "my_monster"
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inventory = [
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4,
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5,
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6,
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7
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]
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color = 8
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test_type = 0
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testbool = 1
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testhashs32_fnv1 = 4
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testhashu32_fnv1 = 5
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testhashs64_fnv1 = 6
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testhashu64_fnv1 = 7
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testhashs32_fnv1a = 8
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testhashu32_fnv1a = 9
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testhashs64_fnv1a = 10
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testhashu64_fnv1a = 11
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testf = 12.1
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testf2 = 13.1
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testf3 = 14.1
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single_weak_reference = 15
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co_owning_reference = 16
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non_owning_reference = 17
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any_unique_type = 0
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any_ambiguous_type = 0
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signed_enum = -1
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2022-09-11 16:08:07 -07:00
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long_enum_non_enum_default = 0
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long_enum_normal_default = 2
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2022-11-08 10:59:46 -08:00
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nan_default = nan
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inf_default = inf
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positive_inf_default = inf
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infinity_default = inf
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positive_infinity_default = inf
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negative_inf_default = -inf
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negative_infinity_default = -inf
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double_inf_default = inf
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2021-03-05 13:01:40 -05:00
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})";
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// Call a generic function that has no specific knowledge of the flatbuffer we
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// are passing in; it should use only static reflection to produce a string
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// representations of the field names and values recursively. We give it an
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// initial indentation so that the result can be compared with our raw string
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// above, which we wanted to indent so that it will look nicer in this code.
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//
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// A note about JSON: as can be seen from the string above, this produces a
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// JSON-like notation, but we are not using any of Flatbuffers' JSON infra to
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// produce this! It is produced entirely using compile-time reflection, and
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// thus does not require any runtime access to the *.fbs definition files!
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std::optional<std::string> result =
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cpp17::StringifyFlatbufferValue(*monster, /*indent=*/" ");
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TEST_ASSERT(result.has_value());
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TEST_EQ_STR(expected.c_str(), result->c_str());
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}
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/*******************************************************************************
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** Test Traits::FieldType
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*******************************************************************************/
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using pos_type = Monster::Traits::FieldType<0>;
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static_assert(std::is_same_v<pos_type, const Vec3*>);
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using mana_type = Monster::Traits::FieldType<1>;
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static_assert(std::is_same_v<mana_type, int16_t>);
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using name_type = Monster::Traits::FieldType<3>;
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static_assert(std::is_same_v<name_type, const flatbuffers::String*>);
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/*******************************************************************************
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** Generic Create Function Test.
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*******************************************************************************/
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2020-01-02 13:12:14 -05:00
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void CreateTableByTypeTest() {
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flatbuffers::FlatBufferBuilder builder;
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// We will create an object of this type using only the type.
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using type_to_create_t = cpp17::MyGame::Example::Stat;
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[&builder] {
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auto id_str = builder.CreateString("my_id");
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auto table = type_to_create_t::Traits::Create(builder, id_str, 42, 7);
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// Be sure that the correct return type was inferred.
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static_assert(
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std::is_same_v<decltype(table), flatbuffers::Offset<type_to_create_t>>);
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builder.Finish(table);
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}();
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// Access it.
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auto stat =
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flatbuffers::GetRoot<type_to_create_t>(builder.GetBufferPointer());
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TEST_EQ_STR(stat->id()->c_str(), "my_id");
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TEST_EQ(stat->val(), 42);
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TEST_EQ(stat->count(), 7);
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}
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2020-09-19 02:51:17 +07:00
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void OptionalScalarsTest() {
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2021-03-05 13:01:40 -05:00
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static_assert(
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std::is_same<flatbuffers::Optional<float>, std::optional<float>>::value);
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2020-09-19 02:51:17 +07:00
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static_assert(std::is_same<flatbuffers::nullopt_t, std::nullopt_t>::value);
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// test C++ nullable
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flatbuffers::FlatBufferBuilder fbb;
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FinishScalarStuffBuffer(fbb, cpp17::optional_scalars::CreateScalarStuff(
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fbb, 1, static_cast<int8_t>(2)));
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auto opts =
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cpp17::optional_scalars::GetMutableScalarStuff(fbb.GetBufferPointer());
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TEST_ASSERT(!opts->maybe_bool());
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TEST_ASSERT(!opts->maybe_f32().has_value());
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TEST_ASSERT(opts->maybe_i8().has_value());
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TEST_EQ(opts->maybe_i8().value(), 2);
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TEST_ASSERT(opts->mutate_maybe_i8(3));
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TEST_ASSERT(opts->maybe_i8().has_value());
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TEST_EQ(opts->maybe_i8().value(), 3);
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TEST_ASSERT(!opts->mutate_maybe_i16(-10));
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cpp17::optional_scalars::ScalarStuffT obj;
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opts->UnPackTo(&obj);
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TEST_ASSERT(!obj.maybe_bool);
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TEST_ASSERT(!obj.maybe_f32.has_value());
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TEST_ASSERT(obj.maybe_i8.has_value() && obj.maybe_i8.value() == 3);
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TEST_ASSERT(obj.maybe_i8 && *obj.maybe_i8 == 3);
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obj.maybe_i32 = -1;
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fbb.Clear();
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FinishScalarStuffBuffer(
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fbb, cpp17::optional_scalars::ScalarStuff::Pack(fbb, &obj));
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opts = cpp17::optional_scalars::GetMutableScalarStuff(fbb.GetBufferPointer());
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TEST_ASSERT(opts->maybe_i8().has_value());
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TEST_EQ(opts->maybe_i8().value(), 3);
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TEST_ASSERT(opts->maybe_i32().has_value());
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TEST_EQ(opts->maybe_i32().value(), -1);
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TEST_EQ(std::optional<int32_t>(opts->maybe_i32()).value(), -1);
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TEST_EQ(std::optional<int64_t>(opts->maybe_i32()).value(), -1);
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TEST_ASSERT(opts->maybe_i32() == std::optional<int64_t>(-1));
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}
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2019-12-24 03:13:48 +07:00
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int FlatBufferCpp17Tests() {
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2020-01-02 13:12:14 -05:00
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CreateTableByTypeTest();
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2020-09-19 02:51:17 +07:00
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OptionalScalarsTest();
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2021-03-05 13:01:40 -05:00
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StringifyAnyFlatbuffersTypeTest();
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2019-12-24 03:13:48 +07:00
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return 0;
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}
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2022-09-11 16:08:07 -07:00
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} // namespace
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2019-12-24 03:13:48 +07:00
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2025-12-19 10:42:57 -08:00
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int main(int /*argc*/, const char* /*argv*/[]) {
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2019-12-24 03:13:48 +07:00
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InitTestEngine();
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FlatBufferCpp17Tests();
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if (!testing_fails) {
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TEST_OUTPUT_LINE("C++17: ALL TESTS PASSED");
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} else {
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TEST_OUTPUT_LINE("C++17: %d FAILED TESTS", testing_fails);
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}
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return CloseTestEngine();
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}
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