-
Notifications
You must be signed in to change notification settings - Fork 0
/
yasvl.hpp
192 lines (176 loc) · 6.49 KB
/
yasvl.hpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
#pragma once
// For the liscence see at the end of this document.
#include <cstdint>
#include <compare>
#include <optional>
#include <string_view>
#include <iterator>
#include <ostream>
#if __has_include(<format>)
#include <format>
#define YASVL_FMT std
#elif __has_include("fmt/format.h")
#include "fmt/format.h"
#define YASVL_FMT fmt
#else
#error To use yasvl you need either "fmt/format.h" or C++20 <format> stdlib support.
#endif
namespace yasvl {
enum class pre_release /*implementation defined underlying type*/ : std::uint_fast8_t { alpha, beta, rc, none };
struct version {
public:
std::uint_fast8_t major = 1;
std::uint_fast8_t minor = 0;
std::uint_fast8_t patch = 0;
pre_release pre_release_type = pre_release::none;
constexpr auto operator<=>(const version&) const noexcept = default;
constexpr bool operator==(const version&) const noexcept = default;
[[nodiscard]] constexpr bool is_pre_release() const noexcept { return pre_release_type != pre_release::none; }
// not constexpr because of from_chars...
[[deprecated("Use at your own risk; still not working properly...")]]
static version from_string(const std::string_view& str) {
auto begin = str.data();
auto strEndPtr = begin + str.size();
version retval;
auto [ptr, ec] = std::from_chars(str.data() + (*begin == 'v' || *begin == 'V'), strEndPtr, retval.major);
if (ec != std::errc()) throw std::invalid_argument("yasvl::version::from_string: The string passed to the function is an invalid version");
if (ptr + 1 != strEndPtr) {
if (*ptr == '.') {
if (auto [ptr2, ec2] = std::from_chars(++ptr, strEndPtr, retval.minor);
ec2 == std::errc()) {
std::advance(ptr, ptr2 - ptr);
if (ptr + 1 != strEndPtr && *ptr == '.') {
std::advance(ptr, std::from_chars(++ptr, strEndPtr, retval.patch).ptr - ptr);
}
}
}
for (;;) {
if (auto ch = *ptr;
ch == '-') {
if (const auto pos1 = str.find_first_of("-alpha");
pos1 != std::string_view::npos) {
retval.pre_release_type = pre_release::alpha;
ptr = str.data() + pos1;
}
else if (const auto pos2 = str.find_first_of("-beta");
pos2 != std::string_view::npos) {
retval.pre_release_type = pre_release::beta;
ptr = str.data() + pos2;
}
else if (const auto pos3 = str.find_first_of("-rc");
pos3 != std::string_view::npos) {
retval.pre_release_type = pre_release::rc;
ptr = str.data() + pos3;
}
else return retval;
}
else if (ch == '+') {
if (decltype(retval.build)::value_type tmp;
std::from_chars(ptr, strEndPtr, tmp).ec == std::errc()) {
retval.build = tmp;
}
break;
}
else break;
}
}
return retval;
}
constexpr void format_to(std::output_iterator<const char&> auto out) const noexcept {
YASVL_FMT ::format_to(out, "v{}.{}.{}", major, minor, patch);
if (pre_release_type != pre_release::none) {
switch (pre_release_type) {
case pre_release::alpha:
for (const auto& ch : "-alpha")
*out++ = ch;
break;
case pre_release::beta:
for (const auto& ch : "-beta")
*out++ = ch;
break;
case pre_release::rc:
for (const auto& ch : "-rc")
*out++ = ch;
break;
case pre_release::none:
[[fallthrough]];
default:
break;
}
if (pre_release_number) {
YASVL_FMT ::format_to(out, ".{}", pre_release_number.value());
}
}
if (build) {
YASVL_FMT ::format_to(out, "+{}", build.value());
}
}
[[nodiscard]] auto to_string() const noexcept {
std::string out;
(*this).format_to(std::back_inserter(out));
return out;
}
friend std::ostream& operator<<(std::ostream& out, const version& ver) {
ver.format_to(std::ostream_iterator<char>(out));
return out;
}
private:
template<typename T1, typename T2>
constexpr friend std::partial_ordering operator<=>(const std::optional<T1>& opt1, const std::optional<T2>& opt2) {
if (!opt1 && !opt2) return std::partial_ordering::unordered;
if (!opt1) return std::partial_ordering::less;
if (!opt2) return std::partial_ordering::greater;
return opt1.value() <=> opt2.value();
}
enum class parseState : std::uint_fast8_t { nums, prerel, build, end };
};
constexpr version compiler_version{
#if defined(__GNUC__)
__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__
#elif defined(__clang__)
__clang_major__, __clang_minor__, __clang_patchlevel__
#elif defined(_MSC_FULL_VER)
_MSC_FULL_VER / 1'000'0000 // too lazy to do more
#endif
};
constexpr version cpp_version{
[]() -> version {
if constexpr (__cplusplus == 1) return { .pre_release_type = pre_release::alpha };
else if constexpr (__cplusplus <= 199711L) return { .pre_release_type = pre_release::beta };
else if constexpr (__cplusplus <= 201103L) return { 11 };
else if constexpr (__cplusplus <= 201402L) return { 14 };
else if constexpr (__cplusplus <= 201703L) return { 17 };
else if constexpr (__cplusplus <= 202002L) return { 20 };
else return { 23 };
}()
};
version yasvl_version{ 2, 0, 0, pre_release::alpha };
}
template<> struct YASVL_FMT ::formatter<yasvl::version> {
constexpr auto parse(YASVL_FMT ::format_parse_context& ctx) {
// we might want to parse like &ma&bu
}
//constexpr auto format(const yasvl::version& value, YASVL_FMT ::format_context& ctx) { value.format_to(ctx.out()); }
};
#undef YASVL_FMT
// This software is distributed under the MIT License
//
// Copyright(c) 2021 Ollivier Roberge
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this softwareand associated documentation files(the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and /or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions :
//
// The above copyright noticeand this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.