#include // [...]10/50 Hello Modules! — File: module.cpp export module my_module; export char const* my_function () { return "Hello Modules!"; } — File: main.cpp #include }11/50 Exporting things // functions export int getNumber (); // types export class SomeType; // templates export template T combine(T n1 , T n2); export template class MyTemplatedType Exporting things export namespace a { void is_exported (); } namespace a { void is_not_exported (); } namespace a { void will_be_exported_in_b (); } export namespace b { export using a:: will_be_exported_in_b

object file 6 . 2 discarded discarded some header.hsource.cpp translation unit object file export module library; library interface unit module library; library implementation library implementation implementation object file import library; program library interface object file 7 . 1 export ...; export ...; BMI BMI Barrier→║ Architected→→ modularized library some allinterface.cpp declarations 4 5 6 7 8 9 module; #include export module my.first_module; export import other.module; #include "mod.h" constexpr int beast = 666; export std::vector frob(S); 1 2 3 4 5 6 7 8 9

Header Units" From C++ Now 20239 Ask ChatGPT 202310 Ask ChatGPT 2024Simple Module 11 export module B; export void b() { }Built Module Interface (BMI) • MSVC – .ifc file • G++ – .gcm file • Clang 12Simple Example (build order order matters) 13 B.cpp: export module B; export void b() { } A.cpp: export module A; import B; export void a(){ b();} cl -std:c++20 -interface -c A.cpp A.cpp A identifier not foundSimple Example (build order matters) 14 B.cpp: export module B; export void b() { } A.cpp: export module A; import B; export void a(){ b();} cl -std:c++20 -interface -c B.cpp B.cpp cl

needs to locate and load the binary module interface (BMI) 👇:Binary module interfaces export module fmt; export namespace fmt { … } fmt.cc fmt.o Module interface unit Other file extensions: .ixx .gcm (gcc) .ifc (msvc) BMI: Binary module interface libfmt.aModule interface unit export module fmt; export namespace fmt { … } import fmt; int main() { fmt::print("Hello, world!\n"); } main imports export module foo; import bar; import qux; export namespace foo { … } import foo; export module bar; export namespace bar { … } my_app.cc foo.cppm bar.cppm export module qux; export namespace

CppCon 2021 | #include "repromath_export.h" namespace repromath { REPROMATH_EXPORT auto ddot(int n, double const *x, double const *y) -> double; REPROMATH_EXPORT auto dsum(int n, double const *x) -> -> double; } Sample loadable library CMake add_library(repromath MODULE) generate_export_header(repromath)10 CppCon 2021 | • LoadLibraryEx("mylib.dll", nullptr, flags) – open and get a handle to return nullptr; } } }; fullinstaller: dll and namespace59 CppCon 2021 | #pragma comment(linker, "/export:instance=?instance@@3Vfullinstaller_factory@whereispython@@A") whereispython::fullinstaller_factory

WoehlkeCMake CPS generation cmake_minimum_required(VERSION 3.15) project(mypkg CXX) set(CMAKE_EXPERIMENTAL_EXPORT_PACKAGE_INFO "b80be207-778e-46ba-8080-b23bba22639e") add_library(mypkg src/mypkg.cpp) target_in set_target_properties(mypkg PROPERTIES PUBLIC_HEADER "include/mypkg.h") install(TARGETS mypkg EXPORT mypkg) install(PACKAGE_INFO mypkg EXPORT mypkg)Generated CPS files { "components": { "mypkg": { "includes": to Makefile 45 export CPPFLAGS="$CPPFLAGS -I/home/diegor/.conan2/p/opensa8f76cb308528/p/include -I/home/diegor/.conan2/p/zlib2f8af40ed7773/p/include" export LIBS="$LIBS -lssl

VBoxManage import . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 8.11 VBoxManage export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129 8.12 VBoxManage startvm VBoxManage clonevm, page 127. 1.14 Importing and exporting virtual machines VirtualBox can import and export virtual machines in the industry-standard Open Virtualization Format (OVF).6 6OVF support was originally that can then be imported into a virtualizer such as VirtualBox. VirtualBox makes OVF import and export easy to access and supports it from the Manager window as well as its command-line interface. This

VBoxManage import . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 8.10 VBoxManage export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 8.11 VBoxManage startvm VBoxManage clonevm, page 122. 1.13 Importing and exporting virtual machines VirtualBox can import and export virtual machines in the industry-standard Open Virtualization Format (OVF).6 OVF is a cross-platform improvements with every version since. 28 1 First steps VirtualBox. VirtualBox makes OVF import and export easy to access and supports it from the Manager window as well as its command-line interface. This

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 4 Contents 8.11 VBoxManage export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134 8.12 VBoxManage startvm VBoxManage clonevm, page 132. 1.14 Importing and exporting virtual machines VirtualBox can import and export virtual machines in the industry-standard Open Virtualization Format (OVF).6 OVF is a cross-platform improvements with every version since. 31 1 First steps VirtualBox. VirtualBox makes OVF import and export easy to access and supports it from the Manager window as well as its command-line interface. This

140 5.44.12 enumerateGuestProperties . . . . . . . . . . . . . . . . . . . . . . . . . 141 5.44.13 export . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 5.44.14 findSnapshot # start web service with object autocollection disabled export VBOX_PROGRAM_PATH=/opt/VirtualBox # your VirtualBox installation directory export VBOX_SDK_PATH=/home/youruser/vbox-sdk # where you’ve extracted system classpath, and you may have to adjust the CLASSPATH environment variable. Something like this: export CLASSPATH="/path-to-axis-1_4/lib/*":$CLASSPATH Use the directory where the Axis JAR files are located