Modules (since C++20)

Modules help divide large amounts of code into logical parts.

Modules are orthogonal to namespaces.

Syntax

export(optional) module module-name module-partition(optional) attribute-specifier-seq(optional);	(1)
export declaration	(2)
export { declaration-seq(optional) }	(3)
export(optional) import module-name attribute-specifier-seq(optional);	(4)
export(optional) import module-partition attribute-specifier-seq(optional);	(5)
export(optional) import header-name attribute-specifier-seq(optional);	(6)
module; top-level-declaration-seq(optional)	(7)