Modern C++ (C++20) wrapper for the "classic" (i.e. outdated) command line arguments (int argc, char* argv[])

Want a modern C++ main function? Set ARGV_ENABLE_MAIN in CMake and define ARGV_MAIN_NAMESPACE for the compiler, then use the Argv Main signature:

int Main(Argv::Argv)

• It is recommended to add Argv as a Git submodule to your project

set(ARGV_ENABLE_MAIN ON)
add_subdirectory(Argv)
target_link_libraries(<TARGET> PRIVATE Argv)

# Use this line if your Main is defined in a namespace
#   otherwise leave it out
target_compile_definitions(<TARGET> PRIVATE ARGV_MAIN_NAMESPACE=<YOUR_NAMESPACE>)

$ mkdir build
$ cmake . -B build
$ cmake --build build

$ build/test/Test arg1 opt2 3 4

int <ARGV_MAIN_NAMESPACE>::Main(Argv::Argv argv)
{
    auto arg0 = argv[0]; // Program
    for (auto arg : argv)
    {
        // use arg...
    }
    return 0;
}

• You can still use the old main with Argv:

int main(int c_argc, char* c_argv[])
{
    Argv::Argv argv(c_argc, c_argv);

    // use argv...

    return 0;
}

Note: Args are stored with a string_view so Argv does not own them; this is fine since Argv just stores the parameters passed to main

• But it is not recommended to create an Argv object from other sources than argc/argv