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1 | 1 | #pragma once |
2 | 2 |
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| 3 | +#include <array> |
| 4 | +#include <string_view> |
| 5 | +#include <utility> |
| 6 | + |
3 | 7 | #if defined(__GNUC__) |
4 | 8 | #define OV_likely(x) __builtin_expect(!!(x), 1) |
5 | 9 | #define OV_unlikely(x) __builtin_expect(!!(x), 0) |
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44 | 48 | #endif // OV_NO_UNIQUE_ADDRESS |
45 | 49 |
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46 | 50 | namespace OpenVic { |
| 51 | + template<std::size_t... Idxs> |
| 52 | + constexpr auto substring_as_array(std::string_view str, std::index_sequence<Idxs...>) { |
| 53 | + return std::array { str[Idxs]... }; |
| 54 | + } |
| 55 | + |
| 56 | + template<typename T> |
| 57 | + constexpr auto type_name_array() { |
| 58 | +#if defined(__clang__) |
| 59 | + constexpr auto prefix = std::string_view { "[T = " }; |
| 60 | + constexpr auto suffix = std::string_view { "]" }; |
| 61 | + constexpr auto function = std::string_view { __PRETTY_FUNCTION__ }; |
| 62 | +#elif defined(__GNUC__) |
| 63 | + constexpr auto prefix = std::string_view { "with T = " }; |
| 64 | + constexpr auto suffix = std::string_view { "]" }; |
| 65 | + constexpr auto function = std::string_view { __PRETTY_FUNCTION__ }; |
| 66 | +#elif defined(_MSC_VER) |
| 67 | + constexpr auto prefix = std::string_view { "type_name_array<" }; |
| 68 | + constexpr auto suffix = std::string_view { ">(void)" }; |
| 69 | + constexpr auto function = std::string_view { __FUNCSIG__ }; |
| 70 | +#else |
| 71 | +#error Unsupported compiler |
| 72 | +#endif |
| 73 | + |
| 74 | + constexpr auto start = function.find(prefix) + prefix.size(); |
| 75 | + constexpr auto end = function.rfind(suffix); |
| 76 | + |
| 77 | + static_assert(start < end); |
| 78 | + |
| 79 | + constexpr auto name = function.substr(start, (end - start)); |
| 80 | + return substring_as_array(name, std::make_index_sequence<name.size()> {}); |
| 81 | + } |
| 82 | + |
| 83 | + template<typename T> |
| 84 | + struct type_name_holder { |
| 85 | + static inline constexpr auto value = type_name_array<T>(); |
| 86 | + }; |
| 87 | + |
| 88 | + template<typename T> |
| 89 | + constexpr auto type_name() -> std::string_view { |
| 90 | + constexpr auto& value = type_name_holder<T>::value; |
| 91 | + return std::string_view { value.data(), value.size() }; |
| 92 | + } |
| 93 | + |
47 | 94 | [[noreturn]] inline void unreachable() { |
48 | 95 | // Uses compiler specific extensions if possible. |
49 | 96 | // Even if no extension is used, undefined behavior is still raised by |
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