clean-up
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Neargye
parent
7dbb2dc63b
commit
96995e87ce
3 changed files with 64 additions and 111 deletions
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@ -57,7 +57,7 @@ template <typename T>
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class SomeClass {
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public:
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void SomeMethod5() const {
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std::cout << nameof::NameofType<T>(false) << std::endl;
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std::cout << nameof::NameofType<T>() << std::endl;
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}
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template <typename C>
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@ -83,7 +83,7 @@ SomeStruct& refvar = somevar;
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SomeStruct* ptrvar = &somevar;
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int main() {
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#if __cplusplus >= 201402L || (defined(_MSVC_LANG ) && _MSVC_LANG >= 201402L )
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#if (__cplusplus >= 201402L || (defined(_MSVC_LANG ) && _MSVC_LANG >= 201402L))
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// Compile-time supported by C++14.
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constexpr auto constexpr_work_fine = NAMEOF(somevar);
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std::cout << constexpr_work_fine << std::endl; // somevar
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@ -35,6 +35,10 @@
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#include <limits>
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#include <ostream>
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#if !(__cplusplus >= 201402L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L))
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#error "Request C++14."
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#endif
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namespace nameof {
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namespace detail {
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@ -49,6 +53,8 @@ struct remove_all_pointers
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: std::conditional<std::is_pointer<T>::value,
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remove_all_pointers<typename std::remove_pointer<T>::type>,
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identity<T>>::type {};
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// STD like compile-time string.
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class cstring final {
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const char* str_;
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std::size_t size_;
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@ -95,35 +101,19 @@ class cstring final {
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inline constexpr const char* data() const noexcept { return str_; }
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inline constexpr void remove_prefix(std::size_t n) {
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str_ += n;
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size_ -= n;
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inline constexpr cstring remove_prefix(std::size_t n) const {
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return {str_ + n, size_ - n};
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}
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inline constexpr void remove_suffix(std::size_t n) {
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size_ -= n;
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inline constexpr cstring remove_suffix(std::size_t n) const {
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return {str_, size_ - n};
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}
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inline constexpr cstring substr(std::size_t pos, std::size_t n) const {
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return {str_ + pos, n};
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}
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inline friend constexpr bool operator==(const cstring& lhs, const cstring& rhs) noexcept;
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inline friend constexpr bool operator!=(const cstring& lhs, const cstring& rhs) noexcept;
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template <std::size_t N>
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inline friend constexpr bool operator==(const cstring& lhs, const char(&str)[N]) noexcept;
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template <std::size_t N>
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inline friend constexpr bool operator!=(const cstring& lhs, const char(&str)[N]) noexcept;
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inline friend std::ostream& operator<<(std::ostream& os, const cstring& str);
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inline operator std::string() const { return std::string(begin(), end()); }
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};
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inline constexpr bool operator==(const cstring& lhs, const cstring& rhs) noexcept {
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inline friend constexpr bool operator==(const cstring& lhs, const cstring& rhs) noexcept {
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if (lhs.size_ != rhs.size_) {
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return false;
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}
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@ -137,35 +127,34 @@ inline constexpr bool operator==(const cstring& lhs, const cstring& rhs) noexcep
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return true;
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}
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inline constexpr bool operator!=(const cstring& lhs, const cstring& rhs) noexcept {
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inline friend constexpr bool operator!=(const cstring& lhs, const cstring& rhs) noexcept {
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return !(lhs == rhs);
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}
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template <std::size_t N>
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inline constexpr bool operator==(const cstring& lhs, const char(&str)[N]) noexcept {
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inline friend constexpr bool operator==(const cstring& lhs, const char(&str)[N]) noexcept {
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return lhs == cstring{str, N - 1};
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}
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template <std::size_t N>
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constexpr bool operator!=(const cstring& lhs, const char(&str)[N]) noexcept {
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inline friend constexpr bool operator!=(const cstring& lhs, const char(&str)[N]) noexcept {
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return !(lhs == cstring{str, N - 1});
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}
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inline std::ostream& operator<<(std::ostream& os, const cstring& str) {
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inline friend std::ostream& operator<<(std::ostream& os, const cstring& str) {
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os.write(str.begin(), str.size());
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return os;
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}
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inline operator std::string() const { return std::string(begin(), size()); }
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};
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inline constexpr bool IsLexeme(char s) noexcept {
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return !((s >= '0' && s <= '9') || (s >= 'a' && s <= 'z') ||
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(s >= 'A' && s <= 'Z') || s == '_');
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}
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inline constexpr cstring NameofBase(const char* name, std::size_t length) noexcept {
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if (length == 0) {
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return {name, length};
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}
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for (std::size_t i = length; i > 0; --i) {
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if (IsLexeme(name[i - 1])) {
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return {&name[i], length - i};
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@ -175,47 +164,9 @@ inline constexpr cstring NameofBase(const char* name, std::size_t length) noexce
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return {name, length};
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}
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inline constexpr cstring NameofFunction(const char* name, std::size_t length) noexcept {
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if (length == 0) {
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return {name, length};
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}
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std::size_t h = 0;
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inline constexpr cstring NameofTemplate(const char* name, std::size_t length, bool with_suffix) noexcept {
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std::size_t p = 0;
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for (std::size_t i = length; i > 0; --i) {
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if (name[i - 1] == '>') {
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++h;
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++p;
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continue;
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}
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if (name[i - 1] == '<') {
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--h;
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++p;
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continue;
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}
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if (h != 0) {
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++p;
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continue;
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}
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if (IsLexeme(name[i - 1]) && h == 0) {
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return {&name[i], length - i - p};
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}
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}
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return {name, length - p};
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}
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inline constexpr cstring NameofType(const char* name, std::size_t length) noexcept {
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if (length == 0) {
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return {name, length};
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}
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std::size_t h = 0;
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std::size_t p = 0;
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for (std::size_t i = length; i > 0; --i) {
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for (std::size_t i = length, h = 0; i > 0; --i) {
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if (h == 0 && (name[i - 1] == '&' || name[i - 1] == '*')) {
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++p;
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continue;
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@ -239,11 +190,11 @@ inline constexpr cstring NameofType(const char* name, std::size_t length) noexce
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}
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if (IsLexeme(name[i - 1]) && h == 0) {
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return {&name[i], length - i - p};
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return {&name[i], length - i - (with_suffix ? 0 : p)};
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}
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}
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return {name, length - p};
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return NameofBase(name, length - (with_suffix ? 0 : p));
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}
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inline constexpr cstring NameofRaw(const char* name, std::size_t length) noexcept {
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@ -257,11 +208,9 @@ template <typename T,
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!std::is_void<T>::value>::type>
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inline constexpr detail::cstring Nameof(const T&, const char* name, std::size_t length) noexcept {
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// TODO: conditional expression is constant
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if (std::is_function<T>::value || std::is_member_function_pointer<T>::value) {
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return detail::NameofFunction(name, length);
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}
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return detail::NameofBase(name, length);
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return (std::is_function<T>::value || std::is_member_function_pointer<T>::value)
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? detail::NameofTemplate(name, length, false)
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: detail::NameofBase(name, length);
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}
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template <typename T,
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@ -271,22 +220,27 @@ template <typename T,
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inline constexpr detail::cstring Nameof(T&&, const char*, std::size_t) = delete;
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template <typename T>
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inline constexpr detail::cstring NameofType(bool full) noexcept {
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#if defined(__GNUC__) || defined(__clang__)
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constexpr auto function_name = __PRETTY_FUNCTION__;
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constexpr auto total_length = sizeof(__PRETTY_FUNCTION__) - 1;
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constexpr auto prefix_length = sizeof("nameof::detail::cstring nameof::NameofType() [T = ") - 1;
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inline constexpr detail::cstring NameofType(bool full = false) noexcept {
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#if defined(__clang__)
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const auto function_name = __PRETTY_FUNCTION__;
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const auto total_length = sizeof(__PRETTY_FUNCTION__) - 1;
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constexpr auto prefix_length = sizeof("nameof::detail::cstring nameof::NameofType(bool) [T = ") - 1;
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constexpr auto suffix_length = sizeof("]") - 1;
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#elif defined(__GNUC__)
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const auto function_name = __PRETTY_FUNCTION__;
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const auto total_length = sizeof(__PRETTY_FUNCTION__) - 1;
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constexpr auto prefix_length = sizeof("constexpr nameof::detail::cstring nameof::NameofType(bool) [T = ") - 1;
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constexpr auto suffix_length = sizeof("]") - 1;
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#elif defined(_MSC_VER)
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constexpr auto function_name = __FUNCSIG__;
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constexpr auto total_length = sizeof(__FUNCSIG__) - 1;
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const auto function_name = __FUNCSIG__;
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const auto total_length = sizeof(__FUNCSIG__) - 1;
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constexpr auto prefix_length = sizeof("class nameof::detail::cstring __cdecl nameof::NameofType<") - 1;
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constexpr auto suffix_length = sizeof(">(bool) noexcept") - 1;
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#endif
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auto type_name = detail::cstring{function_name + prefix_length, total_length - prefix_length - suffix_length};
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const auto raw_type_name = detail::cstring{function_name + prefix_length, total_length - prefix_length - suffix_length};
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type_name = full ? type_name : detail::NameofType(type_name.begin(), type_name.length());
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const auto type_name = full ? raw_type_name : detail::NameofTemplate(raw_type_name.begin(), raw_type_name.length(), false);
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#if defined(_MSC_VER)
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@ -298,13 +252,12 @@ inline constexpr detail::cstring NameofType(bool full) noexcept {
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if (!full && (std::is_class<D>::value || std::is_enum<D>::value) && (std::is_reference<T>::value || std::is_pointer<T>::value)) {
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if (std::is_class<D>::value && type_name[0] == 'c' && type_name[1] == 'l' && type_name[2] == 'a' && type_name[3] == 's' && type_name[4] == 's') {
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type_name.remove_prefix(class_length);
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return type_name.remove_prefix(class_length);
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} else if (std::is_class<D>::value && type_name[0] == 's' && type_name[1] == 't' && type_name[2] == 'r' && type_name[3] == 'u' && type_name[4] == 'c' && type_name[5] == 't') {
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type_name.remove_prefix(struct_length);
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return type_name.remove_prefix(struct_length);
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} else if(std::is_enum<D>::value && type_name[0] == 'e' && type_name[1] == 'n' && type_name[2] == 'u' && type_name[3] == 'm') {
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type_name.remove_prefix(enum_length);
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return type_name.remove_prefix(enum_length);
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}
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//type_name.remove_prefix(type_name[0] == ' ' ? 1 : 0);
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}
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#endif
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@ -75,7 +75,7 @@ Long othervar;
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SomeStruct& refvar = somevar;
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SomeStruct* ptrvar = &somevar;
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#if __cplusplus >= 201402L || (defined(_MSVC_LANG ) && _MSVC_LANG >= 201402L )
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#if (__cplusplus >= 201402L || (defined(_MSVC_LANG ) && _MSVC_LANG >= 201402L))
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// Compile-time supported by C++14.
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TEST_CASE("constexpr") {
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SECTION("NAMEOF") {
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