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api/basic_json/operator_value_t.md

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+# <small>nlohmann::basic_json::</small>operator value_t
+
+```cpp
+constexpr operator value_t() const noexcept;
+```
+
+Return the type of the JSON value as a value from the [`value_t`](value_t.md) enumeration.
+    
+## Return value
+
+the type of the JSON value
+
+| Value type                | return value               |
+|---------------------------|----------------------------|
+| `#!json null`             | `value_t::null`            |
+| boolean                   | `value_t::boolean`         |
+| string                    | `value_t::string`          |
+| number (integer)          | `value_t::number_integer`  |
+| number (unsigned integer) | `value_t::number_unsigned` |
+| number (floating-point)   | `value_t::number_float`    |
+| object                    | `value_t::object`          |
+| array                     | `value_t::array`           |
+| binary                    | `value_t::binary`          |
+| discarded                 | `value_t::discarded`       |
+
+## Exception safety
+
+No-throw guarantee: this member function never throws exceptions.
+
+## Complexity
+
+Constant.
+
+## Examples
+
+??? example
+
+    The following code exemplifies `operator value_t()` for all JSON types.
+    
+    ```cpp
+    --8<-- "examples/operator__value_t.cpp"
+    ```
+    
+    Output:
+    
+    ```json
+    --8<-- "examples/operator__value_t.output"
+    ```
+
+## Version history
+
+- Added in version 1.0.0.
+- Added unsigned integer type in version 2.0.0.
+- Added binary type in version 3.8.0.