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Add support of Optional<T> scalars to C++ code generator (#6092)

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This commit is contained in:
Vladimir Glavnyy
2020-09-19 02:51:17 +07:00
committed by GitHub
parent 6228b66d3d
commit 8c67b5b129
19 changed files with 2471 additions and 133 deletions
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44
tests/cpp17/test_cpp17.cpp
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@@ -30,10 +30,12 @@
// Embed generated code into an isolated namespace.
namespace cpp17 {
#include "generated_cpp17/monster_test_generated.h"
#include "generated_cpp17/optional_scalars_generated.h"
} // namespace cpp17
namespace cpp11 {
#include "../monster_test_generated.h"
#include "../optional_scalars_generated.h"
} // namespace cpp11
void CreateTableByTypeTest() {
@@ -59,8 +61,50 @@ void CreateTableByTypeTest() {
TEST_EQ(stat->count(), 7);
}
void OptionalScalarsTest() {
static_assert(std::is_same<flatbuffers::Optional<float>, std::optional<float>>::value);
static_assert(std::is_same<flatbuffers::nullopt_t, std::nullopt_t>::value);
// test C++ nullable
flatbuffers::FlatBufferBuilder fbb;
FinishScalarStuffBuffer(fbb, cpp17::optional_scalars::CreateScalarStuff(
fbb, 1, static_cast<int8_t>(2)));
auto opts =
cpp17::optional_scalars::GetMutableScalarStuff(fbb.GetBufferPointer());
TEST_ASSERT(!opts->maybe_bool());
TEST_ASSERT(!opts->maybe_f32().has_value());
TEST_ASSERT(opts->maybe_i8().has_value());
TEST_EQ(opts->maybe_i8().value(), 2);
TEST_ASSERT(opts->mutate_maybe_i8(3));
TEST_ASSERT(opts->maybe_i8().has_value());
TEST_EQ(opts->maybe_i8().value(), 3);
TEST_ASSERT(!opts->mutate_maybe_i16(-10));
cpp17::optional_scalars::ScalarStuffT obj;
opts->UnPackTo(&obj);
TEST_ASSERT(!obj.maybe_bool);
TEST_ASSERT(!obj.maybe_f32.has_value());
TEST_ASSERT(obj.maybe_i8.has_value() && obj.maybe_i8.value() == 3);
TEST_ASSERT(obj.maybe_i8 && *obj.maybe_i8 == 3);
obj.maybe_i32 = -1;
fbb.Clear();
FinishScalarStuffBuffer(
fbb, cpp17::optional_scalars::ScalarStuff::Pack(fbb, &obj));
opts = cpp17::optional_scalars::GetMutableScalarStuff(fbb.GetBufferPointer());
TEST_ASSERT(opts->maybe_i8().has_value());
TEST_EQ(opts->maybe_i8().value(), 3);
TEST_ASSERT(opts->maybe_i32().has_value());
TEST_EQ(opts->maybe_i32().value(), -1);
TEST_EQ(std::optional<int32_t>(opts->maybe_i32()).value(), -1);
TEST_EQ(std::optional<int64_t>(opts->maybe_i32()).value(), -1);
TEST_ASSERT(opts->maybe_i32() == std::optional<int64_t>(-1));
}
int FlatBufferCpp17Tests() {
CreateTableByTypeTest();
OptionalScalarsTest();
return 0;
}