feat: update codes to v4

include/toml11/spec.hpp

@@ -0,0 +1,121 @@
+#ifndef TOML11_SPEC_HPP
+#define TOML11_SPEC_HPP
+
+#include <ostream>
+#include <sstream>
+
+#include <cstdint>
+
+namespace toml
+{
+
+struct semantic_version
+{
+    constexpr semantic_version(std::uint32_t mjr, std::uint32_t mnr, std::uint32_t p) noexcept
+        : major(mjr), minor(mnr), patch(p)
+    {}
+
+    std::uint32_t major;
+    std::uint32_t minor;
+    std::uint32_t patch;
+};
+
+constexpr inline semantic_version
+make_semver(std::uint32_t mjr, std::uint32_t mnr, std::uint32_t p) noexcept
+{
+    return semantic_version(mjr, mnr, p);
+}
+
+constexpr inline bool
+operator==(const semantic_version& lhs, const semantic_version& rhs) noexcept
+{
+    return lhs.major == rhs.major &&
+           lhs.minor == rhs.minor &&
+           lhs.patch == rhs.patch;
+}
+constexpr inline bool
+operator!=(const semantic_version& lhs, const semantic_version& rhs) noexcept
+{
+    return !(lhs == rhs);
+}
+constexpr inline bool
+operator<(const semantic_version& lhs, const semantic_version& rhs) noexcept
+{
+    return lhs.major < rhs.major ||
+           (lhs.major == rhs.major && lhs.minor < rhs.minor) ||
+           (lhs.major == rhs.major && lhs.minor == rhs.minor && lhs.patch < rhs.patch);
+}
+constexpr inline bool
+operator>(const semantic_version& lhs, const semantic_version& rhs) noexcept
+{
+    return rhs < lhs;
+}
+constexpr inline bool
+operator<=(const semantic_version& lhs, const semantic_version& rhs) noexcept
+{
+    return !(lhs > rhs);
+}
+constexpr inline bool
+operator>=(const semantic_version& lhs, const semantic_version& rhs) noexcept
+{
+    return !(lhs < rhs);
+}
+
+inline std::ostream& operator<<(std::ostream& os, const semantic_version& v)
+{
+    os << v.major << '.' << v.minor << '.' << v.patch;
+    return os;
+}
+
+inline std::string to_string(const semantic_version& v)
+{
+    std::ostringstream oss;
+    oss << v;
+    return oss.str();
+}
+
+struct spec
+{
+    constexpr static spec default_version() noexcept
+    {
+        return spec::v(1, 0, 0);
+    }
+
+    constexpr static spec v(std::uint32_t mjr, std::uint32_t mnr, std::uint32_t p) noexcept
+    {
+        return spec(make_semver(mjr, mnr, p));
+    }
+
+    constexpr explicit spec(const semantic_version& semver) noexcept
+        : version(semver),
+          v1_1_0_allow_control_characters_in_comments (semantic_version(1, 1, 0) <= semver),
+          v1_1_0_allow_newlines_in_inline_tables      (semantic_version(1, 1, 0) <= semver),
+          v1_1_0_allow_trailing_comma_in_inline_tables(semantic_version(1, 1, 0) <= semver),
+          v1_1_0_allow_non_english_in_bare_keys       (semantic_version(1, 1, 0) <= semver),
+          v1_1_0_add_escape_sequence_e                (semantic_version(1, 1, 0) <= semver),
+          v1_1_0_add_escape_sequence_x                (semantic_version(1, 1, 0) <= semver),
+          v1_1_0_make_seconds_optional                (semantic_version(1, 1, 0) <= semver),
+          ext_hex_float (false),
+          ext_num_suffix(false),
+          ext_null_value(false)
+    {}
+
+    semantic_version version; // toml version
+
+    // diff from v1.0.0 -> v1.1.0
+    bool v1_1_0_allow_control_characters_in_comments;
+    bool v1_1_0_allow_newlines_in_inline_tables;
+    bool v1_1_0_allow_trailing_comma_in_inline_tables;
+    bool v1_1_0_allow_non_english_in_bare_keys;
+    bool v1_1_0_add_escape_sequence_e;
+    bool v1_1_0_add_escape_sequence_x;
+    bool v1_1_0_make_seconds_optional;
+
+    // library extensions
+    bool ext_hex_float;  // allow hex float (in C++ style)
+    bool ext_num_suffix; // allow number suffix (in C++ style)
+    bool ext_null_value; // allow `null` as a value
+};
+
+} // namespace toml
+#endif // TOML11_SPEC_HPP