[BUG] no match for operator<< and const cpp2::nonesuch_

[wolfseifert]

After pulling in 510eae8:

main: () = {
  a: std::any = 1;
  std::cout << a as int << std::endl;
  std::cout << a as int << std::endl;
}

transpiles to

#define CPP2_IMPORT_STD          Yes
#include "cpp2util.h"
auto main() -> int;
auto main() -> int{
  std::any a {1}; 
  std::cout << cpp2::as_(a) << std::endl;
  std::cout << cpp2::as_(std::move(a)) << std::endl;
}

but does not compile

anys.cpp:10:13: error: no match for ‘operator<<’ (operand types are ‘std::ostream’ {aka ‘std::basic_ostream’} and ‘const cpp2::nonesuch_’)
   10 |   std::cout << cpp2::as_(a) << std::endl;
      |   ~~~~~~~~~ ^~ ~~~~~~~~~~~~~~~~~
      |        |                     |
      |        |                     const cpp2::nonesuch_
      |        std::ostream {aka std::basic_ostream}

[Andrew Sukach]

I believe this issue can be fixed. The most recent version generates the expected c++:

std::cout << cpp2::impl::as_<int>(a) << std::endl;
std::cout << cpp2::impl::as_<int>(cpp2::move(a)) << std::endl;

[wolfseifert]

I can confirm that the transpiler output changed to:

#define CPP2_IMPORT_STD          Yes
#include "cpp2util.h"
auto main() -> int;
auto main() -> int{
  std::any a {1}; 
  std::cout << cpp2::impl::as_(a) << std::endl;
  std::cout << cpp2::impl::as_(cpp2::move(a)) << std::endl;
}

but trying to compile still gives:

anys.cpp:10:13: error: no match for 'operator<<' (operand types are 'std::ostream' {aka 'std::basic_ostream'} and 'const cpp2::nonesuch_')
   10 |   std::cout << cpp2::impl::as_(a) << std::endl;
      |   ~~~~~~~~~ ^~ ~~~~~~~~~~~~~~~~~~~~~~~
      |        |                           |
      |        |                           const cpp2::nonesuch_
      |        std::ostream {aka std::basic_ostream}

[Andrew Sukach]

Ah, my bad. I'll see what I can do to fix it.

[Herb Sutter]

Thanks! This should now be fixed with the above commit, please check.