• C++ModulesFirstExec

Commit r245829 (1st Mar 2017) was the first time a module interface, module implementation and main executable linked and ran successfully. It's kind of held together with gaffer tape and bailing twine thought

These are mod-impl-1_[a-d].C in the testsuite.

// interface
module baz [[interface]];
export int Square (int);

int Prod (int, int);

// implementation part-1
module baz;

int Square (int a)
{
  return Prod (a, a);
}

cc1plus -fmodules -std=c++1z 

// implementation part-2
module baz;

// FIXME _MBaz gaffer tape
int _Mbaz::Prod (int a, int b)
{
  return a * b;
}

// main program
import baz;

int Prod (int a, int b)
{
  return -a * b; // What kind of crazy math is this?
}

int Square (float a)
{
  return Prod (int (a), int (a));
}

int main ()
{
  if (Square (2) != 4)
    return 1;

  if (Square (2.0f) != -4)
    return 1;

  return 0;
}

cc1plus -fmodules -std=c++1z mod-impl-1_a.C
cc1plus -fmodules -std=c++1z mod-impl-1_b.C
cc1plus -fmodules -std=c++1z mod-impl-1_c.C
cc1plus -fmodules -std=c++1z mod-impl-1_d.C
g++ mod-impl-1_[a-d].o
./a.out ; echo $?