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#include "function.h"
#include "typetraits.h"
#include <library/cpp/testing/unittest/registar.h>
Y_UNIT_TEST_SUITE(TestFunctionSignature) {
int FF(double x) {
return (int)x;
}
int FFN(double x) noexcept {
return (int)x;
}
int FFF(double x, char xx) {
return (int)x + (int)xx;
}
int FFFN(double x, char xx) noexcept {
return (int)x + (int)xx;
}
struct A {
int F(double x) {
return FF(x);
}
int FN(double x) noexcept {
return FFN(x);
}
int FC(double x) const {
return FF(x);
}
int FCN(double x) const noexcept {
return FFN(x);
}
#define Y_FOR_EACH_REF_QUALIFIED_MEMBERS(XX) \
XX(AsMutLvalue, &, false) \
XX(AsMutLvalueN, &, true) \
XX(AsMutRvalue, &&, false) \
XX(AsMutRvalueN, &&, true) \
XX(AsConstLvalue, const&, false) \
XX(AsConstLvalueN, const&, true) \
XX(AsConstRvalue, const&&, false) \
XX(AsConstRvalueN, const&&, true)
#define Y_ADD_MEMBER(name, qualifiers, isNoexcept) \
int name(double x) qualifiers noexcept(isNoexcept) { \
return FF(x); \
}
Y_FOR_EACH_REF_QUALIFIED_MEMBERS(Y_ADD_MEMBER)
#undef Y_ADD_MEMBER
};
Y_UNIT_TEST(TestPlainFunc) {
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(FF)>, decltype(FF));
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(FFN)>, decltype(FF));
}
Y_UNIT_TEST(TestMethod) {
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(&A::F)>, decltype(FF));
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(&A::FN)>, decltype(FF));
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(&A::FC)>, decltype(FF));
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(&A::FCN)>, decltype(FF));
#define Y_CHECK_MEMBER(name, qualifiers, isNoexcept) \
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(&A::name)>, decltype(FF));
Y_FOR_EACH_REF_QUALIFIED_MEMBERS(Y_CHECK_MEMBER)
#undef Y_CHECK_MEMBER
}
Y_UNIT_TEST(TestLambda) {
auto f = [](double x) -> int {
return FF(x);
};
auto fn = [](double x) mutable noexcept -> int {
return FFN(x);
};
auto fcn = [](double x) noexcept -> int {
return FFN(x);
};
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(f)>, decltype(FF));
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(fn)>, decltype(FF));
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(fcn)>, decltype(FF));
}
Y_UNIT_TEST(TestFunction) {
std::function<int(double)> f(FF);
UNIT_ASSERT_TYPES_EQUAL(TFunctionSignature<decltype(f)>, decltype(FF));
}
template <class F>
void TestCT() {
#define FA(x) TFunctionArg<F, x>
UNIT_ASSERT_TYPES_EQUAL(FA(0), double);
UNIT_ASSERT_TYPES_EQUAL(FA(1), char);
UNIT_ASSERT_TYPES_EQUAL(TFunctionResult<F>, int);
#undef FA
}
Y_UNIT_TEST(TestTypeErasureTraits) {
TestCT<std::function<int(double, char)>>();
}
Y_UNIT_TEST(TestPlainFunctionTraits) {
TestCT<decltype(FFF)>();
TestCT<decltype(FFFN)>();
}
Y_UNIT_TEST(TestLambdaTraits) {
auto fff = [](double xx, char xxx) -> int {
return FFF(xx, xxx);
};
auto fffn = [](double xx, char xxx) mutable noexcept -> int {
return FFFN(xx, xxx);
};
auto fffcn = [](double xx, char xxx) noexcept -> int {
return FFFN(xx, xxx);
};
TestCT<decltype(fff)>();
TestCT<decltype(fffn)>();
TestCT<decltype(fffcn)>();
}
} // Y_UNIT_TEST_SUITE(TestFunctionSignature)
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