CPixieShimGuard.h

Go to the documentation of this file.

 
#ifndef CPIXIESHIMGUARD_H
#define CPIXIESHIMGUARD_H
 
#include <iostream>
 
constexpr int SHIM_UNEXPECTED_ERROR = -1999;
 
template <typename T, typename R, typename Fn>
R shimGuard(T *utils, const char *where, R fallback, Fn fn) {
  try {
    utils->SetLastErrorMessage(""); // Clear any previous error message
    return fn();
  } catch (const std::exception &e) {
    utils->SetLastErrorMessage(e.what());
    std::cerr << where << " unexpected std::exception: " << e.what()
              << std::endl;
    return fallback;
  } catch (...) {
    utils->SetLastErrorMessage("unknown exception");
    std::cerr << where << " unknown exception" << std::endl;
    return fallback;
  }
}
 
template <typename T, typename Fn>
void shimGuardVoid(T *utils, const char *where, Fn fn) {
  try {
    utils->SetLastErrorMessage(""); // Clear any previous error message
    fn();
  } catch (const std::exception &e) {
    utils->SetLastErrorMessage(e.what());
    std::cerr << where << " unexpected std::exception: " << e.what()
              << std::endl;
  } catch (...) {
    utils->SetLastErrorMessage("unknown exception");
    std::cerr << where << " unknown exception" << std::endl;
  }
}
 
template <typename Fn>
auto shimGuardNew(const char *where, Fn fn) -> decltype(fn()) {
  try {
    return fn();
  } catch (const std::exception &e) {
    std::cerr << where
              << " construction failed: unhandled std::exception: " << e.what()
              << std::endl;
    return nullptr;
  } catch (...) {
    std::cerr << where << " construction failed: unknown exception"
              << std::endl;
    return nullptr;
  }
}
 
#endif // CPIXIESHIMGUARD_H