- An integer number can be translated to a floating point number (e.g., by calling `get<double>()`).
- An integer number can be translated to a floating point number.
- A floating pointnnumber can be translated to an integer number (e.g., by calling `get<int>()`). Note the number is truncated and not rounded, ceiled or floored.
- A floating point number can be translated to an integer number. Note the number is truncated and not rounded, ceiled or floored.
- Any value but JSON objects can be translated into an array. The result is a singleton array that consists of the value before.
- Any value (i.e., boolean, string, number, null) but JSON objects can be translated into an array. The result is a singleton array that consists of the value before.
- Any other conversion will throw a `std::logic_error` exception.
- Any other conversion will throw a `std::logic_error` exception.
When compatible, `JSON` values **implicitly convert** to `std::string`, `int`, `double`, `JSON::array_t`, and `JSON::object_t`. Furthermore, **explicit type conversion** is possible using the `get<>()` function with the aforementioned types.
## Initialization
## Initialization
JSON values can be created from many literals and variable types:
JSON values can be created from many literals and variable types:
| JSON type | literal/variable types | examples |
| JSON type | literal/variable types | examples |
| --------- | ---------------------- | -------- |
| --------- | ---------------------- | -------- |
| none | null pointer literal, `nullptr_t` type, no value | ```cpp nullptr``` |
| none | null pointer literal, `nullptr_t` type, no value | `nullptr` |
| number (integer) | integer literal, `short int` type, `int` type, `JSON_number_t` type | `42` |
| number (integer) | integer literal, `short int` type, `int` type, `JSON_number_t` type | `42` |
| number (floating point) | floating point literal, `float` type, `double` type, `JSON::number_float_t` type | `3.141529`
| number (floating point) | floating point literal, `float` type, `double` type, `JSON::number_float_t` type | `3.141529`
| array | initializer list whose elements are `JSON` values (or can be translated into `JSON` values using the rules above), `std::vector<JSON>` type, `JSON::array_t` type | `{1, 2, 3, true, "foo"}` |
| array | initializer list whose elements are `JSON` values (or can be translated into `JSON` values using the rules above), `std::vector<JSON>` type, `JSON::array_t` type, `JSON::array_t&&` rvalue reference | `{1, 2, 3, true, "foo"}` |
| object | initializer list whose elements are pairs of a string literal and a `JSON` value (or can be translated into `JSON` values using the rules above), `std::map<std::string, JSON>` type, `JSON::object_t` type | `{ {"key1", 42}, {"key2", false} }` |
| object | initializer list whose elements are pairs of a string literal and a `JSON` value (or can be translated into `JSON` values using the rules above), `std::map<std::string, JSON>` type, `JSON::object_t` type, `JSON::object_t&&` rvalue reference | `{ {"key1", 42}, {"key2", false} }` |