123 lines
4.1 KiB
C++
123 lines
4.1 KiB
C++
/*
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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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// C++17 code generator: "flatc --cpp_std c++17".
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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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#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 "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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#include "generated_cpp17/optional_scalars_generated.h"
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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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#include "../optional_scalars_generated.h"
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} // namespace cpp11
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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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void OptionalScalarsTest() {
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static_assert(std::is_same<flatbuffers::Optional<float>, std::optional<float>>::value);
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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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int FlatBufferCpp17Tests() {
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CreateTableByTypeTest();
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OptionalScalarsTest();
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return 0;
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}
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int main(int /*argc*/, const char * /*argv*/[]) {
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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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