C++ identifier with special meaning: module (since C++20)

Usage

• module declaration : declares that the current translation unit is a module unit
• Starts a global module fragment of a module unit
• Starts a private module fragment of a module unit

Notes

Example

module;            // starts a global module fragment
#include <string>
export module foo; // ends a global module fragment
                   // declares the primary module interface unit for named module 'foo'
                   // starts a module unit purview
export std::string f();
module : private;  // ends the portion of the module interface unit that
                   // can affect the behavior of other translation units
                   // starts a private module fragment
std::string f()
{
    return "foo";
}

See also

• import , export
• private