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Neargye 2018-08-27 01:30:16 +05:00
parent 80e2b5bbcb
commit cb8c808506
1 changed files with 233 additions and 100 deletions
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333
include/nameof.hpp
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@ -35,53 +35,107 @@
#include <string> #include <string>
#include <ostream> #include <ostream>
#if (defined(__cpp_constexpr) && __cpp_constexpr >= 201304L) || (defined(_MSC_VER) && _MSC_VER >= 1910) #if defined(__cpp_constexpr) && __cpp_constexpr >= 201304L
# define NAMEOF_CONSTEXPR constexpr # define NAMEOF_HAS_CONSTEXPR14 1
# define NAMEOF_HAS_CONSTEXPR 1
#else
# define NAMEOF_CONSTEXPR
# define NAMEOF_HAS_CONSTEXPR 0
#endif #endif
namespace nameof { namespace nameof {
namespace detail { namespace detail {
namespace nstd {
template <typename T> template <typename T>
struct identity { struct identity {
using type = T; using type = T;
}; };
template <typename T> template <typename T>
struct remove_all_pointers 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, : std::conditional<std::is_pointer<T>::value,
remove_all_pointers<typename std::remove_pointer<T>::type>, remove_all_p<typename std::remove_pointer<T>::type>,
identity<T>>::type {}; identity<T>
>::type {};
template <typename T> template <typename T>
using Decay = std::remove_reference<typename std::remove_cv<typename remove_all_pointers<T>::type>::type>; using remove_all_p_t = typename remove_all_p<T>::type;
inline constexpr bool StrEquals(const char* lhs, const char* rhs, std::size_t size) { // 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
constexpr bool StrEquals(const char* lhs, const char* rhs, std::size_t size) {
#if defined(NAMEOF_HAS_CONSTEXPR14)
for (std::size_t i = 0; i < size; ++i) {
if (lhs[i] != rhs[i]) {
return false;
}
}
return true;
#else
return (size == 0) ? (lhs[0] == rhs[0]) : ((lhs[size - 1] == rhs[size - 1]) && StrEquals(lhs, rhs, size - 1)); return (size == 0) ? (lhs[0] == rhs[0]) : ((lhs[size - 1] == rhs[size - 1]) && StrEquals(lhs, rhs, size - 1));
#endif
} }
inline constexpr std::size_t StrLen(const char* str, std::size_t size = 0) { constexpr std::size_t StrLen(const char* str, std::size_t size = 0) {
return (str == nullptr) ? 0 : ((str[size] == '\0') ? size : StrLen(str, size + 1)); #if defined(NAMEOF_HAS_CONSTEXPR14)
for (; str != nullptr; ++size) {
if (str[size] == '\0') {
return size;
}
}
return size;
#else
return (str[size] == '\0') ? size : StrLen(str, size + 1);
#endif
} }
// STD like compile-time const char* string. // STD like compile-time const char* string.
class cstring final { class cstring final {
const char* str_; const char* str_;
const std::size_t size_; std::size_t size_;
public: public:
inline constexpr cstring(const char* str, std::size_t length, std::size_t prefix = 0, std::size_t suffix = 0) noexcept constexpr cstring(const char* str, std::size_t size, std::size_t prefix = 0, std::size_t suffix = 0) noexcept
: str_{str + prefix}, : str_{str + prefix},
size_{length - prefix - suffix} {} size_{size - prefix - suffix} {}
inline constexpr cstring() noexcept : cstring{nullptr, 0, 0, 0} {} constexpr cstring() noexcept : cstring{nullptr, 0, 0, 0} {}
inline constexpr cstring(const char* str) noexcept : cstring{str, StrLen(str), 0, 0} {} constexpr cstring(const char* str) noexcept : cstring{str, StrLen(str), 0, 0} {}
cstring(const cstring&) = default; cstring(const cstring&) = default;
@ -93,103 +147,155 @@ class cstring final {
~cstring() = default; ~cstring() = default;
inline constexpr std::size_t size() const noexcept { return size_; } constexpr std::size_t size() const noexcept { return size_; }
inline constexpr std::size_t length() const noexcept { return size_; } constexpr std::size_t length() const noexcept { return size_; }
inline constexpr bool empty() const noexcept { return size_ == 0; } constexpr bool empty() const noexcept { return size_ == 0; }
inline constexpr const char* begin() const noexcept { return str_; } constexpr const char* begin() const noexcept { return str_; }
inline constexpr const char* end() const noexcept { return str_ + size_; } constexpr const char* end() const noexcept { return str_ + size_; }
inline constexpr const char* cbegin() const noexcept { return begin(); } constexpr const char* cbegin() const noexcept { return begin(); }
inline constexpr const char* cend() const noexcept { return end(); } constexpr const char* cend() const noexcept { return end(); }
inline constexpr const char& operator[](std::size_t i) const { return str_[i]; } constexpr const char& operator[](std::size_t i) const { return str_[i]; }
inline constexpr const char& front() const { return str_[0]; } constexpr const char& front() const { return str_[0]; }
inline constexpr const char& back() const { return str_[size_ - 1]; } constexpr const char& back() const { return str_[size_ - 1]; }
inline constexpr const char* data() const noexcept { return str_; } constexpr const char* data() const noexcept { return str_; }
inline constexpr cstring remove_prefix(std::size_t n) const { constexpr cstring remove_prefix(std::size_t n) const {
return {str_ + n, size_ - n}; return {str_ + n, size_ - n};
} }
inline constexpr cstring remove_suffix(std::size_t n) const { constexpr cstring add_prefix(std::size_t n) const {
return {str_ - n, size_ + n};
}
constexpr cstring remove_suffix(std::size_t n) const {
return {str_, size_ - n}; return {str_, size_ - n};
} }
inline constexpr cstring substr(std::size_t pos, std::size_t n) const { constexpr cstring add_suffix(std::size_t n) const {
return {str_, size_ + n};
}
constexpr cstring substr(std::size_t pos, std::size_t n) const {
return {str_ + pos, n}; return {str_ + pos, n};
} }
inline friend constexpr bool operator==(const cstring& lhs, const cstring& rhs) noexcept { friend constexpr bool operator==(const cstring& lhs, const cstring& rhs) noexcept {
return (lhs.size_ == rhs.size_) && StrEquals(lhs.begin(), rhs.begin(), lhs.size()); return (lhs.size_ == rhs.size_) && StrEquals(lhs.str_, rhs.str_, lhs.size_);
} }
inline friend constexpr bool operator!=(const cstring& lhs, const cstring& rhs) noexcept { friend constexpr bool operator!=(const cstring& lhs, const cstring& rhs) noexcept {
return !(lhs == rhs); return !(lhs == rhs);
} }
inline friend std::ostream& operator<<(std::ostream& os, const cstring& str) { friend std::ostream& operator<<(std::ostream& os, const cstring& str) {
os.write(str.begin(), str.size()); os.write(str.str_, str.size_);
os.write("!", 1);
return os; return os;
} }
inline operator std::string() const { return std::string(begin(), size()); } operator std::string() const { return std::string(str_, size_); }
}; };
inline constexpr bool IsLexeme(char s) noexcept { constexpr bool IsLexeme(char s) noexcept {
return !((s >= '0' && s <= '9') || (s >= 'a' && s <= 'z') || (s >= 'A' && s <= 'Z') || s == '_'); return !((s >= '0' && s <= '9') || (s >= 'a' && s <= 'z') || (s >= 'A' && s <= 'Z') || s == '_');
} }
inline NAMEOF_CONSTEXPR cstring NameofBase(const char* name, std::size_t length, bool with_suffix) noexcept { #if defined(NAMEOF_HAS_CONSTEXPR14)
std::size_t p = 0; constexpr cstring NameofBase(const cstring& name, bool with_suffix) noexcept {
if(IsLexeme(name[length - 1])) { std::size_t s = 0;
for (std::size_t i = length, h = 0; i > 0; --i) { for (std::size_t i = name.size(), h = 0; i > 0; --i) {
if (h == 0 && (IsLexeme(name[i - 1]) && name[i - 1] != '>')) { if (name[i - 1] == '>') {
++p; ++h;
continue; ++s;
} continue;
}
if (name[i - 1] == '>') { if (name[i - 1] == '<') {
++h; --h;
++p; ++s;
continue; continue;
} }
if (name[i - 1] == '<') { if (h != 0) {
--h; ++s;
++p; continue;
continue; }
}
if (h != 0) { if (h == 0) {
++p; break;
continue;
}
if (h == 0) {
break;
}
} }
} }
for (std::size_t i = length - p; i > 0; --i) { for (std::size_t i = name.size() - s; i > 0; --i) {
if (IsLexeme(name[i - 1])) { if (IsLexeme(name[i - 1])) {
return {&name[i], length - i - (with_suffix ? 0 : p)}; return name.remove_prefix(i).remove_suffix(with_suffix ? 0 : s);
}
} }
}
return {name, length - (with_suffix ? 0 : p)}; return name.remove_suffix(with_suffix ? 0 : s);
}
#else
constexpr std::size_t NameofBaseImpl1(const cstring& name, std::size_t h = 0, std::size_t s = 0) noexcept {
return name[name.size() - 1 - s] == '>'
? NameofBaseImpl1(name, h + 1, s + 1)
: name[name.size() - 1 - s] == '<'
? NameofBaseImpl1(name, h - 1, s + 1)
: h == 0 ? s : NameofBaseImpl1(name, h, s + 1);
} }
inline constexpr cstring NameofRaw(const char* name, std::size_t length) noexcept { constexpr cstring NameofBaseImpl2(const cstring& name, const std::size_t p = 0) noexcept {
return {name, length}; return p == name.size() ? name : IsLexeme(name[name.size() - 1 - p])
? name.remove_prefix(name.size() - p)
: NameofBaseImpl2(name, p + 1);
}
constexpr cstring NameofBaseImpl3(const cstring& name, std::size_t s, bool with_suffix) noexcept {
return NameofBaseImpl2(name.remove_suffix(s)).add_suffix(with_suffix ? s : 0);
}
constexpr cstring NameofBase(const cstring& name, bool with_suffix) noexcept {
return NameofBaseImpl3(name, NameofBaseImpl1(name), with_suffix);
}
#endif
constexpr cstring RemoveSpace(const cstring& name) noexcept {
return name.back() == ' ' ? RemoveSpace(name.remove_suffix(1)) : name;
}
constexpr cstring RemoveClassPrefix(const cstring& name) noexcept {
return (name.size() > sizeof("class") && name[0] == 'c' && name[1] == 'l' &&
name[2] == 'a' && name[3] == 's' && name[4] == 's' && name[5] == ' ')
? name.remove_prefix(sizeof("class"))
: name;
}
constexpr cstring RemoveEnumPrefix(const cstring& name) noexcept {
return (name.size() > sizeof("enum") && name[0] == 'e' && name[1] == 'n' &&
name[2] == 'u' && name[3] == 'm' && name[4] == ' ')
? name.remove_prefix(sizeof("enum"))
: name;
}
constexpr cstring RemoveStructPrefix(const cstring& name) noexcept {
return (name.size() > sizeof("struct") && name[0] == 's' && name[1] == 't' &&
name[2] == 'r' && name[3] == 'u' && name[4] == 'c' && name[5] == 't' && name[6] == ' ')
? name.remove_prefix(sizeof("struct"))
: name;
}
constexpr cstring NameofTypeRawImpl(const cstring& name, bool raw) noexcept {
return raw
? name
: RemoveClassPrefix(RemoveStructPrefix(RemoveEnumPrefix(RemoveSpace(name))));
} }
} // namespace detail } // namespace detail
@ -197,56 +303,77 @@ inline constexpr cstring NameofRaw(const char* name, std::size_t length) noexcep
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>
inline NAMEOF_CONSTEXPR detail::cstring Nameof(const T&, const char* name, std::size_t length, bool with_suffix = false) noexcept { constexpr detail::cstring Nameof(const T&, const char* name, std::size_t size, bool with_suffix) noexcept {
return detail::NameofBase(name, length, with_suffix); return detail::NameofBase({name, size}, with_suffix);
} }
template <typename T, template <typename T,
typename = typename std::enable_if<!std::is_enum<T>::value && typename = typename std::enable_if<!std::is_enum<T>::value &&
!std::is_function<T>::value && !std::is_function<T>::value &&
!std::is_member_function_pointer<T>::value>::type> !std::is_member_function_pointer<T>::value>::type>
inline NAMEOF_CONSTEXPR detail::cstring Nameof(T&&, const char*, std::size_t, bool) = delete; constexpr detail::cstring Nameof(T&&, const char*, std::size_t, bool) = delete;
constexpr detail::cstring NameofRaw(const char* name, std::size_t size) noexcept {
return {name, size};
}
template <typename T> template <typename T>
inline NAMEOF_CONSTEXPR detail::cstring NameofTypeRaw() noexcept { constexpr detail::cstring NameofTypeRaw(bool raw = false) noexcept {
#if defined(__clang__) #if defined(__clang__)
return {__PRETTY_FUNCTION__, return detail::NameofTypeRawImpl(
{__PRETTY_FUNCTION__,
sizeof(__PRETTY_FUNCTION__) - 1, sizeof(__PRETTY_FUNCTION__) - 1,
sizeof("detail::cstring nameof::NameofTypeRaw() [T = ") - 1, sizeof("detail::cstring nameof::NameofTypeRaw(bool) [T = nameof::detail::nstd::identity<") - 1,
sizeof("]") - 1}; sizeof(">]") - 1},
raw);
#elif defined(__GNUC__) #elif defined(__GNUC__)
return {__PRETTY_FUNCTION__, return detail::NameofTypeRawImpl(
{__PRETTY_FUNCTION__,
sizeof(__PRETTY_FUNCTION__) - 1, sizeof(__PRETTY_FUNCTION__) - 1,
# if NAMEOF_HAS_CONSTEXPR sizeof("constexpr nameof::detail::cstring nameof::NameofTypeRaw(bool) [with T = nameof::detail::nstd::identity<") - 1,
sizeof("constexpr nameof::detail::cstring nameof::NameofTypeRaw() [with T = ") - 1, sizeof(">]") - 1},
# else raw);
sizeof("nameof::detail::cstring nameof::NameofTypeRaw() [with T = ") - 1,
# endif
sizeof("]") - 1};
#elif defined(_MSC_VER) #elif defined(_MSC_VER)
return {__FUNCSIG__, return detail::NameofTypeRawImpl(
{__FUNCSIG__,
sizeof(__FUNCSIG__) - 1, sizeof(__FUNCSIG__) - 1,
sizeof("class nameof::detail::cstring __cdecl nameof::NameofTypeRaw<") - 1, sizeof("class nameof::detail::cstring __cdecl nameof::NameofTypeRaw<struct nameof::detail::nstd::identity<") - 1,
sizeof(">(void) noexcept") - 1}; sizeof(">>(bool) noexcept") - 1},
raw);
#else #else
return {}; return {};
#endif #endif
} }
template <typename T, typename D = typename detail::Decay<T>::type> template <typename T, typename D = detail::nstd::identity<detail::nstd::remove_all_cvrpe_t<T>>>
inline NAMEOF_CONSTEXPR detail::cstring NameofType() noexcept { constexpr detail::cstring NameofType(bool with_suffix = false) noexcept {
const auto raw_type_name = NameofTypeRaw<D>(); return detail::NameofBase(NameofTypeRaw<D>(), with_suffix);
return detail::NameofBase(raw_type_name.begin(), raw_type_name.length(), false);
} }
} // namespace nameof } // namespace nameof
#if defined(__GNUC__) || defined(__clang__) #if defined(__clang__)
# if __has_feature(cxx_rtti)
# 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)
#include <typeinfo>
// Used to obtain the raw string name of a variable, type, member, function, macros. // 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))))) # define NAMEOF_RAW(name) ::nameof::NameofRaw(#name, ((sizeof(#name) / sizeof(char)) - 1) + (0 * sizeof(typeid(name))))
#elif defined(_MSC_VER) #elif defined(__clang__) || defined(__GNUC__)
// Used to obtain the raw string name of a variable, type, member, function, macros. // 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(typeid(name)))) # define NAMEOF_RAW(name) ::nameof::NameofRaw(#name, ((sizeof(#name) / sizeof(char)) - 1) + (0 * sizeof(void(*)(__typeof__(name)))))
#endif #endif
// Used to obtain the simple (unqualified) string name of a variable, member, function. // Used to obtain the simple (unqualified) string name of a variable, member, function.
@ -256,7 +383,13 @@ inline NAMEOF_CONSTEXPR detail::cstring NameofType() noexcept {
#define NAMEOF_FULL(name) ::nameof::Nameof<decltype(name)>(name, #name, (sizeof(#name) / sizeof(char)) - 1, true) #define NAMEOF_FULL(name) ::nameof::Nameof<decltype(name)>(name, #name, (sizeof(#name) / sizeof(char)) - 1, true)
// Used to obtain the simple (unqualified) string name of a type. // Used to obtain the simple (unqualified) string name of a type.
#define NAMEOF_TYPE(name) ::nameof::NameofType<decltype(name)>() #define NAMEOF_TYPE(var) ::nameof::NameofType<decltype(var)>(false)
#define NAMEOF_TYPE_T(type) ::nameof::NameofType<type>(false)
// Used to obtain the full string name of a type.
#define NAMEOF_TYPE_FULL(var) ::nameof::NameofType<decltype(var)>(true)
#define NAMEOF_TYPE_FULL_T(type) ::nameof::NameofType<type>(true)
// Used to obtain the raw string name of a type. // Used to obtain the raw string name of a type.
#define NAMEOF_TYPE_RAW(name) ::nameof::NameofTypeRaw<decltype(name)>() #define NAMEOF_TYPE_RAW(var) ::nameof::NameofTypeRaw<::nameof::detail::nstd::identity<decltype(var)>>(false)
#define NAMEOF_TYPE_RAW_T(type) ::nameof::NameofTypeRaw<::nameof::detail::nstd::identity<type>>(false)