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Neargye 2018-08-27 18:40:23 +05:00
parent 5e0024145c
commit 46a5376eb3
3 changed files with 87 additions and 155 deletions
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42
example/example.cpp
View file

@ -49,15 +49,16 @@ void SomeMethod3() {
} }
template <typename T> template <typename T>
T SomeMethod4() { std::string SomeMethod4() {
return T{}; std::cout << NAMEOF_TYPE_T(T) << std::endl;
return NAMEOF_FULL(SomeMethod4<T>);
} }
template <typename T> template <typename T>
class SomeClass { class SomeClass {
public: public:
void SomeMethod5() const { void SomeMethod5() const {
std::cout << NAMEOF_TYPE_T(T) << std::endl; std::cout << nameof::NameofType<T>() << std::endl;
} }
template <typename C> template <typename C>
@ -103,6 +104,7 @@ int main() {
std::cout << NAMEOF(&SomeStruct::SomeMethod2) << std::endl; // SomeMethod2 std::cout << NAMEOF(&SomeStruct::SomeMethod2) << std::endl; // SomeMethod2
std::cout << NAMEOF(SomeMethod3) << std::endl; // SomeMethod3 std::cout << NAMEOF(SomeMethod3) << std::endl; // SomeMethod3
std::cout << NAMEOF(SomeMethod4<int>()) << std::endl; // SomeMethod4
std::cout << NAMEOF(SomeMethod4<int>) << std::endl; // SomeMethod4 std::cout << NAMEOF(SomeMethod4<int>) << std::endl; // SomeMethod4
std::cout << NAMEOF_FULL(SomeMethod4<int>) << std::endl; // SomeMethod4<int> std::cout << NAMEOF_FULL(SomeMethod4<int>) << std::endl; // SomeMethod4<int>
@ -122,11 +124,9 @@ int main() {
std::cout << NAMEOF_TYPE_T(SomeClass<int>) << std::endl; // SomeClass<int> std::cout << NAMEOF_TYPE_T(SomeClass<int>) << std::endl; // SomeClass<int>
// Raw name. // Raw name.
std::cout << NAMEOF_RAW(volatile const int) << std::endl; // volatile const int
std::cout << NAMEOF_RAW(__LINE__) << std::endl; // __LINE__ std::cout << NAMEOF_RAW(__LINE__) << std::endl; // __LINE__
std::cout << NAMEOF_RAW(structvar.somefield) << std::endl; // structvar.somefield std::cout << NAMEOF_RAW(structvar.somefield) << std::endl; // structvar.somefield
std::cout << NAMEOF_RAW(&SomeStruct::SomeMethod1) << std::endl; // &SomeStruct::SomeMethod1 std::cout << NAMEOF_RAW(&SomeStruct::SomeMethod1) << std::endl; // &SomeStruct::SomeMethod1
std::cout << NAMEOF_RAW(Long::LL) << std::endl; // Long::LL
const auto div = [](int x, int y) -> int { const auto div = [](int x, int y) -> int {
if (y == 0) { if (y == 0) {
@ -143,27 +143,31 @@ int main() {
} }
/* Remarks */ /* Remarks */
#if 0 #if 1
// This expression does not have a name. // This expression does not have a name.
std::cout << NAMEOF("Bad case") << std::endl; // '"Bad case"' std::cout << NAMEOF("Bad case"_string) << std::endl; // '_string'
std::cout << NAMEOF("Bad case"_string) << std::endl; // '"Bad case"_string'
std::cout << NAMEOF("somevar.somefield") << std::endl; // 'somefield"'
std::cout << NAMEOF(42.0) << std::endl; // '0' std::cout << NAMEOF(42.0) << std::endl; // '0'
std::cout << NAMEOF(42.f) << std::endl; // 'f' std::cout << NAMEOF(42.f) << std::endl; // 'f'
std::cout << NAMEOF(42) << std::endl; // '42' std::cout << NAMEOF(42) << std::endl; // '42'
std::cout << NAMEOF(42.0_deg) << std::endl; // '0_deg' std::cout << NAMEOF(42.0_deg) << std::endl; // '0_deg'
std::cout << NAMEOF(std::string()) << std::endl; // 'string()' std::cout << NAMEOF(std::string()) << std::endl; // 'string'
std::cout << NAMEOF(std::string{}) << std::endl; // "string{}' std::cout << NAMEOF(std::string{}) << std::endl; // 'string'
std::cout << NAMEOF(std::string{"test"}) << std::endl; // 'string{"test"}' std::cout << NAMEOF(std::string{"test"}) << std::endl; // 'string'
std::cout << NAMEOF(SomeMethod4<int>()) << std::endl; // '()' std::cout << NAMEOF(structvar.somefield + structvar.somefield) << std::endl; // ' somefield'
std::cout << NAMEOF(42 + 42) << std::endl; // ' 42'
std::cout << NAMEOF(NAMEOF(structvar)) << std::endl; // 'NAMEOF'
#endif
#if 0
// This expression does not compilation.
std::cout << NAMEOF("Bad case") << std::endl; // ''
std::cout << NAMEOF("somevar.somefield") << std::endl; // ''
std::cout << NAMEOF(std::basic_string<char>) << std::endl; // '' std::cout << NAMEOF(std::basic_string<char>) << std::endl; // ''
std::cout << NAMEOF(ptrvar[0]) << std::endl; // 'ptrvar[0]' std::cout << NAMEOF(ptrvar[0]) << std::endl; // 'ptrvar[0]'
std::cout << NAMEOF(intvar + intvar) << std::endl; // ' intvar' std::cout << NAMEOF(std::cout << structvar << std::endl) << std::endl; // ''
std::cout << NAMEOF(NAMEOF(intvar)) << std::endl; // 'NAMEOF(intvar)' std::cout << NAMEOF(decltype(structvar)) << std::endl; // ''
std::cout << NAMEOF(std::cout << intvar << std::endl) << std::endl; // 'endl' std::cout << NAMEOF(typeid(structvar)) << std::endl; // ''
std::cout << NAMEOF(decltype(intvar)) << std::endl; // 'decltype(intvar)' std::cout << NAMEOF((structvar)) << std::endl; // ''
std::cout << NAMEOF(typeid(intvar)) << std::endl; // 'typeid(intvar)'
std::cout << NAMEOF((intvar)) << std::endl; // '(intvar)'
#endif #endif
return 0; return 0;

170
include/nameof.hpp
View file

@ -39,7 +39,7 @@
# define NAMEOF_HAS_CONSTEXPR14 1 # define NAMEOF_HAS_CONSTEXPR14 1
#endif #endif
#if defined(__clang__) || defined(_MSC_VER) #if (defined(__clang__) || defined(_MSC_VER)) || (defined(__GNUC__) && __GNUC__ >= 5)
# define NAMEOF_TYPE_CONSTEXPR constexpr # define NAMEOF_TYPE_CONSTEXPR constexpr
# define NAMEOF_TYPE_HAS_CONSTEXPR 1 # define NAMEOF_TYPE_HAS_CONSTEXPR 1
#else #else
@ -57,49 +57,6 @@ struct identity {
using type = T; using type = T;
}; };
template <typename T>
using identity_t = typename identity<T>::type;
// Removes all pointer from the given type.
template <typename T>
struct remove_all_p
: std::conditional<std::is_pointer<T>::value,
remove_all_p<typename std::remove_pointer<T>::type>,
identity<T>
>::type {};
template <typename T>
using remove_all_p_t = typename remove_all_p<T>::type;
// Removes const, volatile, reference specifiers from the given type.
template <typename T>
struct remove_cvr {
using type = typename std::remove_cv<typename std::remove_reference<T>::type>::type;
};
template <typename T>
using remove_cvr_t = typename remove_cvr<T>::type;
// Removes all const, volatile, reference, pointer specifiers from the given type.
template <typename T>
struct remove_all_cvrp {
using type = typename remove_cvr<typename remove_all_p<typename remove_cvr<T>::type>::type>::type;
};
template <typename T>
using remove_all_cvrp_t = typename remove_all_cvrp<T>::type;
// Removes all const, volatile, reference, pointer, array extents specifiers from the given type.
template <typename T, typename U = typename remove_all_cvrp<T>::type>
struct remove_all_cvrpe
: std::conditional<std::is_array<U>::value,
remove_all_cvrpe<typename std::remove_all_extents<U>::type>,
identity<U>
>::type {};
template <typename T>
using remove_all_cvrpe_t = typename remove_all_cvrpe<T>::type;
} // namespace nstd } // namespace nstd
constexpr bool StrEquals(const char* lhs, const char* rhs, std::size_t size) { constexpr bool StrEquals(const char* lhs, const char* rhs, std::size_t size) {
@ -220,13 +177,11 @@ constexpr bool IsLexeme(char s) noexcept {
constexpr cstring NameofPretty(cstring name, bool with_suffix) noexcept { constexpr cstring NameofPretty(cstring name, bool with_suffix) noexcept {
std::size_t s = 0; std::size_t s = 0;
for (std::size_t i = name.size(), h = 0; i > 0; --i) { for (std::size_t i = name.size(), h = 0; i > 0; --i) {
if (name[i - 1] == '>') { if (name[i - 1] == '>' || name[i - 1] == ')' || name[i - 1] == '}') {
++h; ++h;
++s; ++s;
continue; continue;
} } else if (name[i - 1] == '<' || name[i - 1] == '(' || name[i - 1] == '{') {
if (name[i - 1] == '<') {
--h; --h;
++s; ++s;
continue; continue;
@ -249,31 +204,32 @@ constexpr cstring NameofPretty(cstring name, bool with_suffix) noexcept {
return name.remove_suffix(with_suffix ? 0 : s); return name.remove_suffix(with_suffix ? 0 : s);
} }
#else #else
constexpr std::size_t NameofBaseImpl1(cstring name, std::size_t h = 0, std::size_t s = 0) noexcept { constexpr std::size_t FindSuffix(cstring name, std::size_t h = 0, std::size_t s = 0) noexcept {
return name[name.size() - 1 - s] == '>' return (name[name.size() - 1 - s] == '>' || name[name.size() - 1 - s] == ')' || name[name.size() - 1 - s] == '}')
? NameofBaseImpl1(name, h + 1, s + 1) ? FindSuffix(name, h + 1, s + 1)
: name[name.size() - 1 - s] == '<' : (name[name.size() - 1 - s] == '<' || name[name.size() - 1 - s] == ')' || name[name.size() - 1 - s] == '{')
? NameofBaseImpl1(name, h - 1, s + 1) ? FindSuffix(name, h - 1, s + 1)
: h == 0 ? s : NameofBaseImpl1(name, h, s + 1); : h == 0 ? s : FindSuffix(name, h, s + 1);
} }
constexpr cstring NameofBaseImpl2(cstring name, const std::size_t p = 0) noexcept { constexpr cstring RemovePrefix(cstring name, const std::size_t p = 0) noexcept {
return p == name.size() ? name : IsLexeme(name[name.size() - 1 - p]) return p == name.size() ? name : IsLexeme(name[name.size() - 1 - p])
? name.remove_prefix(name.size() - p) ? name.remove_prefix(name.size() - p)
: NameofBaseImpl2(name, p + 1); : RemovePrefix(name, p + 1);
} }
constexpr cstring NameofBaseImpl3(cstring name, std::size_t s, bool with_suffix) noexcept { constexpr cstring NameofPrettyImpl(cstring name, std::size_t s, bool with_suffix) noexcept {
return NameofBaseImpl2(name.remove_suffix(s)).add_suffix(with_suffix ? s : 0); return RemovePrefix(name.remove_suffix(s)).add_suffix(with_suffix ? s : 0);
} }
constexpr cstring NameofPretty(cstring name, bool with_suffix) noexcept { constexpr cstring NameofPretty(cstring name, bool with_suffix) noexcept {
return NameofBaseImpl3(name, NameofBaseImpl1(name), with_suffix); return NameofPrettyImpl(name, FindSuffix(name), with_suffix);
} }
#endif #endif
constexpr cstring RemoveSpace(cstring name) noexcept { #if defined(_MSC_VER)
return name.back() == ' ' ? RemoveSpace(name.remove_suffix(1)) : name; constexpr cstring RemoveSpaceSuffix(cstring name) noexcept {
return name.back() == ' ' ? RemoveSpaceSuffix(name.remove_suffix(1)) : name;
} }
constexpr cstring RemoveClassPrefix(cstring name) noexcept { constexpr cstring RemoveClassPrefix(cstring name) noexcept {
@ -297,27 +253,39 @@ constexpr cstring RemoveStructPrefix(cstring name) noexcept {
: name; : name;
} }
constexpr cstring NameofTypeRawPretty(cstring name) noexcept { constexpr cstring NameofTypePretty(cstring name) noexcept {
return RemoveClassPrefix(RemoveStructPrefix(RemoveEnumPrefix(RemoveSpace(name)))); return RemoveClassPrefix(RemoveStructPrefix(RemoveEnumPrefix(RemoveSpaceSuffix(name))));
} }
#elif defined(__clang__) || defined(__GNUC__)
constexpr cstring NameofTypePretty(const char* str, std::size_t size, std::size_t prefix, std::size_t suffix) noexcept {
return {str, size, prefix, suffix + (str[size - suffix - 1] == ' ' ? 1 : 0)};
}
#endif
template <typename T> template <typename T>
NAMEOF_TYPE_CONSTEXPR cstring NameofTypeRaw() noexcept { NAMEOF_TYPE_CONSTEXPR cstring NameofType() noexcept {
#if defined(__clang__) #if defined(__clang__)
return {__PRETTY_FUNCTION__, return NameofTypePretty(
sizeof(__PRETTY_FUNCTION__) - 1, __PRETTY_FUNCTION__,
sizeof("nameof::detail::cstring nameof::detail::NameofTypeRaw() [T = nameof::detail::nstd::identity<") - 1, sizeof(__PRETTY_FUNCTION__) - 1,
sizeof(">]") - 1}; sizeof("nameof::detail::cstring nameof::detail::NameofType() [T = nameof::detail::nstd::identity<") - 1,
sizeof(">]") - 1);
#elif defined(__GNUC__) #elif defined(__GNUC__)
return {__PRETTY_FUNCTION__, return NameofTypePretty(
sizeof(__PRETTY_FUNCTION__) - 1, __PRETTY_FUNCTION__,
sizeof("nameof::detail::cstring nameof::detail::NameofTypeRaw() [with T = nameof::detail::nstd::identity<") - 1, sizeof(__PRETTY_FUNCTION__) - 1,
sizeof(">]") - 1}; # if defined(NAMEOF_TYPE_HAS_CONSTEXPR)
sizeof("constexpr nameof::detail::cstring nameof::detail::NameofType() [with T = nameof::detail::nstd::identity<") - 1,
# else
sizeof("nameof::detail::cstring nameof::detail::NameofType() [with T = nameof::detail::nstd::identity<") - 1,
# endif
sizeof(">]") - 1);
#elif defined(_MSC_VER) #elif defined(_MSC_VER)
return {__FUNCSIG__, return NameofTypePretty(
sizeof(__FUNCSIG__) - 1, {__FUNCSIG__,
sizeof("class nameof::detail::cstring __cdecl nameof::detail::NameofTypeRaw<struct nameof::detail::nstd::identity<") - 1, sizeof(__FUNCSIG__) - 1,
sizeof(">>(void) noexcept") - 1}; sizeof("class nameof::detail::cstring __cdecl nameof::detail::NameofType<struct nameof::detail::nstd::identity<") - 1,
sizeof(">>(void) noexcept") - 1});
#else #else
return {}; return {};
#endif #endif
@ -326,16 +294,11 @@ NAMEOF_TYPE_CONSTEXPR cstring NameofTypeRaw() noexcept {
template <typename T, template <typename T,
typename = typename std::enable_if<!std::is_reference<T>::value && typename = typename std::enable_if<!std::is_reference<T>::value &&
!std::is_void<T>::value>::type> !std::is_void<T>::value>::type>
constexpr cstring Nameof(const T&, const char* name, std::size_t size, bool with_suffix) noexcept { constexpr cstring Nameof(const char* name, std::size_t size, bool with_suffix) noexcept {
return NameofPretty({name, size}, with_suffix); return NameofPretty({name, size}, with_suffix);
} }
template <typename T, template <typename T>
typename = typename std::enable_if<!std::is_enum<T>::value &&
!std::is_function<T>::value &&
!std::is_member_function_pointer<T>::value>::type>
constexpr cstring Nameof(T&&, const char*, std::size_t, bool) = delete;
constexpr cstring NameofRaw(const char* name, std::size_t size) noexcept { constexpr cstring NameofRaw(const char* name, std::size_t size) noexcept {
return {name, size}; return {name, size};
} }
@ -343,42 +306,21 @@ constexpr cstring NameofRaw(const char* name, std::size_t size) noexcept {
} // namespace detail } // namespace detail
template <typename T, typename H = detail::nstd::identity<T>> template <typename T, typename H = detail::nstd::identity<T>>
NAMEOF_TYPE_CONSTEXPR detail::cstring NameofType(bool pretty = true) noexcept { NAMEOF_TYPE_CONSTEXPR detail::cstring NameofType() noexcept {
return pretty ? detail::NameofTypeRawPretty(detail::NameofTypeRaw<H>()) : detail::NameofTypeRaw<H>(); return true ? detail::NameofType<H>() : detail::NameofType<H>();
} }
} // namespace nameof } // namespace nameof
#if defined(__clang__) // Used to obtain the simple (unqualified) string name of a variable, member, function, macros.
# if __has_feature(cxx_rtti) #define NAMEOF(name) ::nameof::detail::Nameof<decltype(name)>(#name, (sizeof(#name) / sizeof(char)) - 1, false)
# define NAMEOF_HAS_RTTI 1
# endif
#elif defined(__GNUC__)
# if defined(__GXX_RTTI)
# define NAMEOF_HAS_RTTI 1
# endif
#elif defined(_MSC_VER) && defined(_CPPRTTI)
# if defined(_CPPRTTI)
# define NAMEOF_HAS_RTTI 1
# endif
#endif
#if defined(NAMEOF_HAS_RTTI) || defined(_MSC_VER) // Used to obtain the full string name of a variable, member, function, macros.
#include <typeinfo> #define NAMEOF_FULL(name) ::nameof::detail::Nameof<decltype(name)>(#name, (sizeof(#name) / sizeof(char)) - 1, true)
// Used to obtain the raw string name of a variable, type, member, function, macros. // Used to obtain the raw string name of a variable, member, function, macros.
# define NAMEOF_RAW(name) ::nameof::detail::NameofRaw(#name, ((sizeof(#name) / sizeof(char)) - 1) + (0 * sizeof(typeid(name)))) #define NAMEOF_RAW(name) ::nameof::detail::NameofRaw<decltype(name)>(#name, (sizeof(#name) / sizeof(char)) - 1)
#elif defined(__clang__) || defined(__GNUC__)
// Used to obtain the raw string name of a variable, type, member, function, macros.
# define NAMEOF_RAW(name) ::nameof::detail::NameofRaw(#name, ((sizeof(#name) / sizeof(char)) - 1) + (0 * sizeof(void(*)(__typeof__(name)))))
#endif
// Used to obtain the simple (unqualified) string name of a variable, member, function.
#define NAMEOF(name) ::nameof::detail::Nameof<decltype(name)>(name, #name, (sizeof(#name) / sizeof(char)) - 1, false)
// Used to obtain the full string name of a variable, member, function.
#define NAMEOF_FULL(name) ::nameof::detail::Nameof<decltype(name)>(name, #name, (sizeof(#name) / sizeof(char)) - 1, true)
// Used to obtain the string name of a type. // Used to obtain the string name of a type.
#define NAMEOF_TYPE(var) ::nameof::NameofType<decltype(var)>(true) #define NAMEOF_TYPE(var) ::nameof::NameofType<decltype(var)>()
#define NAMEOF_TYPE_T(type) ::nameof::NameofType<type>(true) #define NAMEOF_TYPE_T(type) ::nameof::NameofType<type>()

30
test/test.cpp
View file

@ -114,9 +114,6 @@ TEST_CASE("constexpr") {
// member // member
constexpr auto cx2 = NAMEOF_RAW((&structvar)->somefield); constexpr auto cx2 = NAMEOF_RAW((&structvar)->somefield);
static_assert(cx2 == "(&structvar)->somefield", ""); static_assert(cx2 == "(&structvar)->somefield", "");
// type
constexpr auto cx3 = NAMEOF_RAW(std::string);
static_assert(cx3 == "std::string", "");
// function // function
constexpr auto cx4 = NAMEOF_RAW(&SomeStruct::SomeMethod2); constexpr auto cx4 = NAMEOF_RAW(&SomeStruct::SomeMethod2);
static_assert(cx4 == "&SomeStruct::SomeMethod2", ""); static_assert(cx4 == "&SomeStruct::SomeMethod2", "");
@ -127,24 +124,23 @@ TEST_CASE("constexpr") {
constexpr auto cx6 = NAMEOF_RAW(__cplusplus); constexpr auto cx6 = NAMEOF_RAW(__cplusplus);
static_assert(cx6 == "__cplusplus", ""); static_assert(cx6 == "__cplusplus", "");
} }
#if defined(NAMEOF_TYPE_HAS_CONSTEXPR)
// constexpr NAMEOF_TYPE not supported in GCC.
#if defined(_MSC_VER) || defined(__clang__)
SECTION("NAMEOF_TYPE") { SECTION("NAMEOF_TYPE") {
constexpr auto cx = NAMEOF_TYPE(classvar); constexpr auto cx = NAMEOF_TYPE(classvar);
#if defined(__clang__) # if defined(__clang__)
static_assert(cx == "const volatile SomeClass<int> *", ""); static_assert(cx == "const volatile SomeClass<int> *", "");
#elif defined(_MSC_VER) # elif defined(_MSC_VER)
static_assert(cx == "SomeClass<int> const volatile *", ""); static_assert(cx == "SomeClass<int> const volatile *", "");
#endif # endif
} }
SECTION("NAMEOF_TYPE_T") { SECTION("NAMEOF_TYPE_T") {
constexpr auto cx = NAMEOF_TYPE_T(const SomeClass<int> volatile *); constexpr auto cx = NAMEOF_TYPE_T(const SomeClass<int> volatile *);
#if defined(__clang__) # if defined(__clang__)
static_assert(cx == "const volatile SomeClass<int> *", ""); static_assert(cx == "const volatile SomeClass<int> *", "");
#elif defined(_MSC_VER) # elif defined(_MSC_VER)
static_assert(cx == "SomeClass<int> const volatile *", ""); static_assert(cx == "SomeClass<int> const volatile *", "");
#endif # endif
} }
#endif #endif
} }
@ -225,16 +221,6 @@ TEST_CASE("NAMEOF_RAW") {
REQUIRE(NAMEOF_RAW(othervar.ll.field) == "othervar.ll.field"); REQUIRE(NAMEOF_RAW(othervar.ll.field) == "othervar.ll.field");
} }
SECTION("type") {
REQUIRE(NAMEOF_RAW(int[]) == "int[]");
REQUIRE(NAMEOF_RAW(int) == "int");
REQUIRE(NAMEOF_RAW(const volatile int[]) == "const volatile int[]");
REQUIRE(NAMEOF_RAW(std::string) == "std::string");
REQUIRE(NAMEOF_RAW(SomeStruct) == "SomeStruct");
REQUIRE(NAMEOF_RAW(Long::LL) == "Long::LL");
REQUIRE(NAMEOF_RAW(Color) == "Color");
}
SECTION("function") { SECTION("function") {
REQUIRE(NAMEOF_RAW(&SomeStruct::SomeMethod1) == "&SomeStruct::SomeMethod1"); REQUIRE(NAMEOF_RAW(&SomeStruct::SomeMethod1) == "&SomeStruct::SomeMethod1");
REQUIRE(NAMEOF_RAW(&SomeStruct::SomeMethod2) == "&SomeStruct::SomeMethod2"); REQUIRE(NAMEOF_RAW(&SomeStruct::SomeMethod2) == "&SomeStruct::SomeMethod2");