Modules (since C++20)

 

C++

Language

Standard Library Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

C++ language

 

Basic Concepts

language keywords

phases of translation

comments

the main() function

names and identifiers

types

fundamental types

objects

scope

object lifetime

storage duration and linkage

definitions and ODR

name lookup

qualified name lookup

unqualified name lookup

the as-if rule

undefined behavior

memory model

 

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)