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feat(C++): Support underlying_type for union (#7954)

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* feat(C++): support underlying type for union

* chore: add conform checks for underlying type changes
This commit is contained in:
sssooonnnggg
2023-05-15 12:22:38 +08:00
committed by GitHub
parent fe5e4c71c5
commit 1d3afb90c5
10 changed files with 1004 additions and 17 deletions
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37
tests/test.cpp
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@@ -39,6 +39,7 @@
#include "proto_test.h"
#include "reflection_test.h"
#include "union_vector/union_vector_generated.h"
#include "union_underlying_type_test_generated.h"
#if !defined(_MSC_VER) || _MSC_VER >= 1700
# include "arrays_test_generated.h"
#endif
@@ -1540,6 +1541,41 @@ void DoNotRequireEofTest(const std::string &tests_data_path) {
}
#endif
void UnionUnderlyingTypeTest() {
using namespace UnionUnderlyingType;
TEST_ASSERT(sizeof(ABC) == sizeof(uint32_t));
TEST_ASSERT(ABC::ABC_A == 555);
TEST_ASSERT(ABC::ABC_B == 666);
TEST_ASSERT(ABC::ABC_C == 777);
DT buffer;
AT a;
a.a = 42;
BT b;
b.b = "foo";
CT c;
c.c = true;
buffer.test_union = ABCUnion();
buffer.test_union.Set(a);
buffer.test_vector_of_union.resize(3);
buffer.test_vector_of_union[0].Set(a);
buffer.test_vector_of_union[1].Set(b);
buffer.test_vector_of_union[2].Set(c);
flatbuffers::FlatBufferBuilder fbb;
auto offset = D::Pack(fbb, &buffer);
fbb.Finish(offset);
auto *root =
flatbuffers::GetRoot<D>(fbb.GetBufferPointer());
DT unpacked;
root->UnPackTo(&unpacked);
TEST_ASSERT(unpacked.test_union == buffer.test_union);
TEST_ASSERT(unpacked.test_vector_of_union == buffer.test_vector_of_union);
}
static void Offset64Tests() {
Offset64Test();
Offset64SerializedFirst();
@@ -1663,6 +1699,7 @@ int FlatBufferTests(const std::string &tests_data_path) {
FixedSizedStructArrayKeyInStructTest();
EmbeddedSchemaAccess();
Offset64Tests();
UnionUnderlyingTypeTest();
return 0;
}
} // namespace