json/api/macros/nlohmann_json_namespace_no_version/index.md

NLOHMANN_JSON_NAMESPACE_NO_VERSION

#define NLOHMANN_JSON_NAMESPACE_NO_VERSION /* value */

If defined to 1, the version component is omitted from the inline namespace. See nlohmann Namespace for details.

Default definition

The default value is 0.

#define NLOHMANN_JSON_NAMESPACE_NO_VERSION 0

When the macro is not defined, the library will define it to its default value.

Examples

Example

The example shows how to use NLOHMANN_JSON_NAMESPACE_NO_VERSION to disable the version component of the inline namespace.

#include <iostream>

#define NLOHMANN_JSON_NAMESPACE_NO_VERSION 1
#include <nlohmann/json.hpp>

// macro needed to output the NLOHMANN_JSON_NAMESPACE as string literal
#define Q(x) #x
#define QUOTE(x) Q(x)

int main()
{
    std::cout << QUOTE(NLOHMANN_JSON_NAMESPACE) << '\n';
}

Output:

nlohmann::json_abi

See also

• nlohmann Namespace - how the library's namespace is defined and versioned
• NLOHMANN_JSON_NAMESPACE - macro expanding to the library namespace
• NLOHMANN_JSON_NAMESPACE_BEGIN, NLOHMANN_JSON_NAMESPACE_END - macros to open and close the library namespace
• Supported Macros - guide to all supported macros

Version history

• Added in version 3.11.2.