New problem of C++ modules

[Extra-Creativity]

Visual Studio can compile while xmake cannot, with strange error - redefinition of std::string_view.
xmake.lua：

add_rules("mode.debug", "mode.release")
set_languages("cxxlatest")

target("module-split-impl")
    set_kind("binary")
    add_files("*.cpp")
    add_files("Person.mpp")

main.cpp：

import std;
import Person;

int main()
{
    std::println("---------module-split-impl---------");
    HelloWorld();
    Person person{"Wow", 6};
    person.Print();
    return 0;
}

Person.mpp：

export module Person; // denote that it's a module interface.

import std;

export class Person
{
public:
    Person(const std::string& init_name, std::uint64_t init_id);
    void Print();

private:
    std::string name;
    std::uint64_t id;
};

export void HelloWorld();

Peron.cpp：

module Person; // denote that it's a module implementation
import std;

Person::Person(const std::string& init_name, std::uint64_t init_id):
    name{init_name}, id{init_id} {}

void Person::Print()
{
    std::println("Person #{}: {}", id, name);
}

Person-Func.cpp：

module Person;
import std;

void HelloWorld()
{
    std::println("Hello, world!");
}

[Extra-Creativity]

I also find that example of module partition in cppreference cannot be compiled in xmake.

[waruqi]

@Arthapz Any idea? I have not latest vs version now.

[Extra-Creativity]

I'm not sure whether it's related to another VS bug I report here. This example cannot be built either by VS or by xmake.

[Arthapz]

well it work on my side

but i'm using VS 17.9.0 Preview 5

[Extra-Creativity]

Okay, possibly it's a VS bug. I'd try it in the next VS version. What about the module partition example in cppreference?

[Arthapz]

there is an issue with .cpp modules currently
consider using .mpp / .cppm / .ixx for named module / module partition for now
i'll fix that later on