Method HaveCxxModuleSupport

Source/cmGeneratorTarget.cxx:6178–6208

}

cmGeneratorTarget::Cxx20SupportLevel cmGeneratorTarget::HaveCxxModuleSupport(
  std::string const& config) const
{
  auto const* state = this->Makefile->GetState();
  if (!state->GetLanguageEnabled("CXX")) {
    return Cxx20SupportLevel::MissingCxx;
  }

  cmValue standardDefault =
    this->Makefile->GetDefinition("CMAKE_CXX_STANDARD_DEFAULT");
  if (!standardDefault || standardDefault->empty()) {
    // We do not know any meaningful C++ standard levels for this compiler.
    return Cxx20SupportLevel::NoCxx20;
  }

  cmStandardLevelResolver standardResolver(this->Makefile);
  cmStandardLevel const cxxStd20 =
    *standardResolver.LanguageStandardLevel("CXX", "20");
  cm::optional<cmStandardLevel> explicitLevel =
    this->GetExplicitStandardLevel("CXX", config);
  if (!explicitLevel || *explicitLevel < cxxStd20) {
    return Cxx20SupportLevel::NoCxx20;
  }

  cmValue scandepRule =
    this->Makefile->GetDefinition("CMAKE_CXX_SCANDEP_SOURCE");
  if (!scandepRule) {
    return Cxx20SupportLevel::MissingRule;
  }
  return Cxx20SupportLevel::Supported;
}

void cmGeneratorTarget::CheckCxxModuleStatus(std::string const& config) const
{