The type used to represent any JSON value This is a [Regular](https://en.cppreference.com/w/cpp/concepts/regular) type which works like a variant of the basic JSON data types: array, object, string, number, boolean, and null. @par Thread Safety Distinct instances may be accessed concurrently. Non-const member functions of a shared instance may not be called concurrently w
| 50 | other member functions of that instance. |
| 51 | */ |
| 52 | class value |
| 53 | { |
| 54 | #ifndef BOOST_JSON_DOCS |
| 55 | using scalar = detail::scalar; |
| 56 | |
| 57 | union |
| 58 | { |
| 59 | storage_ptr sp_; // must come first |
| 60 | array arr_; |
| 61 | object obj_; |
| 62 | string str_; |
| 63 | scalar sca_; |
| 64 | }; |
| 65 | #endif |
| 66 | |
| 67 | struct init_iter; |
| 68 | |
| 69 | #ifndef BOOST_JSON_DOCS |
| 70 | // VFALCO doc toolchain incorrectly treats this as public |
| 71 | friend struct detail::access; |
| 72 | #endif |
| 73 | |
| 74 | explicit |
| 75 | value( |
| 76 | detail::unchecked_array&& ua) |
| 77 | : arr_(std::move(ua)) |
| 78 | { |
| 79 | } |
| 80 | |
| 81 | explicit |
| 82 | value( |
| 83 | detail::unchecked_object&& uo) |
| 84 | : obj_(std::move(uo)) |
| 85 | { |
| 86 | } |
| 87 | |
| 88 | value( |
| 89 | detail::key_t const&, |
| 90 | string_view s, |
| 91 | storage_ptr sp) |
| 92 | : str_(detail::key_t{}, s, std::move(sp)) |
| 93 | { |
| 94 | } |
| 95 | |
| 96 | value( |
| 97 | detail::key_t const&, |
| 98 | string_view s1, |
| 99 | string_view s2, |
| 100 | storage_ptr sp) |
| 101 | : str_(detail::key_t{}, s1, s2, std::move(sp)) |
| 102 | { |
| 103 | } |
| 104 | |
| 105 | inline bool is_scalar() const noexcept |
| 106 | { |
| 107 | return sca_.k < json::kind::string; |
| 108 | } |
| 109 |