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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/traits.h"
#include "gtest/gtest.h"
namespace tint {
namespace traits {
namespace {
struct S {};
void F1(S) {}
void F3(int, S, float) {}
} // namespace
TEST(ParamType, Function) {
F1({}); // Avoid unused method warning
F3(0, {}, 0); // Avoid unused method warning
static_assert(std::is_same_v<ParameterType<decltype(&F1), 0>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&F3), 0>, int>);
static_assert(std::is_same_v<ParameterType<decltype(&F3), 1>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&F3), 2>, float>);
static_assert(std::is_same_v<ReturnType<decltype(&F1)>, void>);
static_assert(std::is_same_v<ReturnType<decltype(&F3)>, void>);
static_assert(SignatureOfT<decltype(&F1)>::parameter_count == 1);
static_assert(SignatureOfT<decltype(&F3)>::parameter_count == 3);
}
TEST(ParamType, Method) {
class C {
public:
void F1(S) {}
void F3(int, S, float) {}
};
C().F1({}); // Avoid unused method warning
C().F3(0, {}, 0); // Avoid unused method warning
static_assert(std::is_same_v<ParameterType<decltype(&C::F1), 0>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 0>, int>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 1>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 2>, float>);
static_assert(std::is_same_v<ReturnType<decltype(&C::F1)>, void>);
static_assert(std::is_same_v<ReturnType<decltype(&C::F3)>, void>);
static_assert(SignatureOfT<decltype(&C::F1)>::parameter_count == 1);
static_assert(SignatureOfT<decltype(&C::F3)>::parameter_count == 3);
}
TEST(ParamType, ConstMethod) {
class C {
public:
void F1(S) const {}
void F3(int, S, float) const {}
};
C().F1({}); // Avoid unused method warning
C().F3(0, {}, 0); // Avoid unused method warning
static_assert(std::is_same_v<ParameterType<decltype(&C::F1), 0>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 0>, int>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 1>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 2>, float>);
static_assert(std::is_same_v<ReturnType<decltype(&C::F1)>, void>);
static_assert(std::is_same_v<ReturnType<decltype(&C::F3)>, void>);
static_assert(SignatureOfT<decltype(&C::F1)>::parameter_count == 1);
static_assert(SignatureOfT<decltype(&C::F3)>::parameter_count == 3);
}
TEST(ParamType, StaticMethod) {
class C {
public:
static void F1(S) {}
static void F3(int, S, float) {}
};
C::F1({}); // Avoid unused method warning
C::F3(0, {}, 0); // Avoid unused method warning
static_assert(std::is_same_v<ParameterType<decltype(&C::F1), 0>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 0>, int>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 1>, S>);
static_assert(std::is_same_v<ParameterType<decltype(&C::F3), 2>, float>);
static_assert(std::is_same_v<ReturnType<decltype(&C::F1)>, void>);
static_assert(std::is_same_v<ReturnType<decltype(&C::F3)>, void>);
static_assert(SignatureOfT<decltype(&C::F1)>::parameter_count == 1);
static_assert(SignatureOfT<decltype(&C::F3)>::parameter_count == 3);
}
TEST(ParamType, FunctionLike) {
using F1 = std::function<void(S)>;
using F3 = std::function<void(int, S, float)>;
static_assert(std::is_same_v<ParameterType<F1, 0>, S>);
static_assert(std::is_same_v<ParameterType<F3, 0>, int>);
static_assert(std::is_same_v<ParameterType<F3, 1>, S>);
static_assert(std::is_same_v<ParameterType<F3, 2>, float>);
static_assert(std::is_same_v<ReturnType<F1>, void>);
static_assert(std::is_same_v<ReturnType<F3>, void>);
static_assert(SignatureOfT<F1>::parameter_count == 1);
static_assert(SignatureOfT<F3>::parameter_count == 3);
}
TEST(ParamType, Lambda) {
auto l1 = [](S) {};
auto l3 = [](int, S, float) {};
static_assert(std::is_same_v<ParameterType<decltype(l1), 0>, S>);
static_assert(std::is_same_v<ParameterType<decltype(l3), 0>, int>);
static_assert(std::is_same_v<ParameterType<decltype(l3), 1>, S>);
static_assert(std::is_same_v<ParameterType<decltype(l3), 2>, float>);
static_assert(std::is_same_v<ReturnType<decltype(l1)>, void>);
static_assert(std::is_same_v<ReturnType<decltype(l3)>, void>);
static_assert(SignatureOfT<decltype(l1)>::parameter_count == 1);
static_assert(SignatureOfT<decltype(l3)>::parameter_count == 3);
}
TEST(Slice, Empty) {
auto sliced = Slice<0, 0>(std::make_tuple<>());
static_assert(std::tuple_size_v<decltype(sliced)> == 0);
}
TEST(Slice, SingleElementSliceEmpty) {
auto sliced = Slice<0, 0>(std::make_tuple<int>(1));
static_assert(std::tuple_size_v<decltype(sliced)> == 0);
}
TEST(Slice, SingleElementSliceFull) {
auto sliced = Slice<0, 1>(std::make_tuple<int>(1));
static_assert(std::tuple_size_v<decltype(sliced)> == 1);
static_assert(std::is_same_v<std::tuple_element_t<0, decltype(sliced)>, int>,
"");
EXPECT_EQ(std::get<0>(sliced), 1);
}
TEST(Slice, MixedTupleSliceEmpty) {
auto sliced = Slice<1, 0>(std::make_tuple<int, bool, float>(1, true, 2.0f));
static_assert(std::tuple_size_v<decltype(sliced)> == 0);
}
TEST(Slice, MixedTupleSliceFull) {
auto sliced = Slice<0, 3>(std::make_tuple<int, bool, float>(1, true, 2.0f));
static_assert(std::tuple_size_v<decltype(sliced)> == 3);
static_assert(std::is_same_v<std::tuple_element_t<0, decltype(sliced)>, int>,
"");
static_assert(std::is_same_v<std::tuple_element_t<1, decltype(sliced)>, bool>,
"");
static_assert(
std::is_same_v<std::tuple_element_t<2, decltype(sliced)>, float>);
EXPECT_EQ(std::get<0>(sliced), 1);
EXPECT_EQ(std::get<1>(sliced), true);
EXPECT_EQ(std::get<2>(sliced), 2.0f);
}
TEST(Slice, MixedTupleSliceLowPart) {
auto sliced = Slice<0, 2>(std::make_tuple<int, bool, float>(1, true, 2.0f));
static_assert(std::tuple_size_v<decltype(sliced)> == 2);
static_assert(std::is_same_v<std::tuple_element_t<0, decltype(sliced)>, int>,
"");
static_assert(std::is_same_v<std::tuple_element_t<1, decltype(sliced)>, bool>,
"");
EXPECT_EQ(std::get<0>(sliced), 1);
EXPECT_EQ(std::get<1>(sliced), true);
}
TEST(Slice, MixedTupleSliceHighPart) {
auto sliced = Slice<1, 2>(std::make_tuple<int, bool, float>(1, true, 2.0f));
static_assert(std::tuple_size_v<decltype(sliced)> == 2);
static_assert(std::is_same_v<std::tuple_element_t<0, decltype(sliced)>, bool>,
"");
static_assert(
std::is_same_v<std::tuple_element_t<1, decltype(sliced)>, float>);
EXPECT_EQ(std::get<0>(sliced), true);
EXPECT_EQ(std::get<1>(sliced), 2.0f);
}
TEST(Slice, PreservesRValueRef) {
int i;
int& int_ref = i;
auto tuple = std::forward_as_tuple(std::move(int_ref));
static_assert(std::is_same_v<int&&, //
std::tuple_element_t<0, decltype(tuple)>>);
auto sliced = Slice<0, 1>(std::move(tuple));
static_assert(std::is_same_v<int&&, //
std::tuple_element_t<0, decltype(sliced)>>);
}
TEST(SliceTuple, Empty) {
using sliced = SliceTuple<0, 0, std::tuple<>>;
static_assert(std::tuple_size_v<sliced> == 0);
}
TEST(SliceTuple, SingleElementSliceEmpty) {
using sliced = SliceTuple<0, 0, std::tuple<int>>;
static_assert(std::tuple_size_v<sliced> == 0);
}
TEST(SliceTuple, SingleElementSliceFull) {
using sliced = SliceTuple<0, 1, std::tuple<int>>;
static_assert(std::tuple_size_v<sliced> == 1);
static_assert(std::is_same_v<std::tuple_element_t<0, sliced>, int>);
}
TEST(SliceTuple, MixedTupleSliceEmpty) {
using sliced = SliceTuple<1, 0, std::tuple<int, bool, float>>;
static_assert(std::tuple_size_v<sliced> == 0);
}
TEST(SliceTuple, MixedTupleSliceFull) {
using sliced = SliceTuple<0, 3, std::tuple<int, bool, float>>;
static_assert(std::tuple_size_v<sliced> == 3);
static_assert(std::is_same_v<std::tuple_element_t<0, sliced>, int>);
static_assert(std::is_same_v<std::tuple_element_t<1, sliced>, bool>);
static_assert(std::is_same_v<std::tuple_element_t<2, sliced>, float>);
}
TEST(SliceTuple, MixedTupleSliceLowPart) {
using sliced = SliceTuple<0, 2, std::tuple<int, bool, float>>;
static_assert(std::tuple_size_v<sliced> == 2);
static_assert(std::is_same_v<std::tuple_element_t<0, sliced>, int>);
static_assert(std::is_same_v<std::tuple_element_t<1, sliced>, bool>);
}
TEST(SliceTuple, MixedTupleSliceHighPart) {
using sliced = SliceTuple<1, 2, std::tuple<int, bool, float>>;
static_assert(std::tuple_size_v<sliced> == 2);
static_assert(std::is_same_v<std::tuple_element_t<0, sliced>, bool>);
static_assert(std::is_same_v<std::tuple_element_t<1, sliced>, float>);
}
} // namespace traits
} // namespace tint