try_catch.cc

来自「模拟嵌入式硬件平台的软件源代码」· CC 代码 · 共 127 行

// 2002-05-27

#include <exception>
#include <stdexcept>
#include <string>

namespace __gnu_test
{
  enum 	region { oriental, egyptian, greek, etruscan, roman };

  // Test one.
  class gnu_obj_1
  {
  public:
    typedef region antiquities;
    const bool 		test;
    const int 		key1;
    long       		key2;

    antiquities 	value;

    gnu_obj_1(antiquities a, long l): test(true), key1(5), key2(l), value(a) {}
  };

  // Test two.
  template<typename T>
    class gnu_obj_2: public virtual gnu_obj_1
    {
    public:
      antiquities	value_derived;
      
      gnu_obj_2(antiquities b): gnu_obj_1(oriental, 7), value_derived(b) { }
    }; 

  // Test three.
  template<typename T>
    class gnu_obj_3
    {
    public:
      typedef region antiquities;
      gnu_obj_2<int>   	data;
      
      gnu_obj_3(antiquities b): data(etruscan) { }
    }; 
} 

int main()
{
  using namespace __gnu_test;

  bool test = true;
  const int i = 5;
  int j = i;
  gnu_obj_2<long> test2(roman);
  gnu_obj_3<long> test3(greek);

  // 1
  try
    {
      ++j;
      throw gnu_obj_1(egyptian, 4589);      
    }
  catch (gnu_obj_1& obj)
    {
      ++j;
      if (obj.value != egyptian)
	test &= false;
      if (obj.key2 != 4589)
	test &= false;     
    }
  catch (...)
    {
      j = 0;
      test &= false;
    }

  // 2
  try
    {
      ++j;
      try
	{
	  ++j;
	  try
	    {
	      ++j;
	      throw gnu_obj_1(egyptian, 4589); 
	    }
	  catch (gnu_obj_1& obj)
	    {
	      ++j;
	      if (obj.value != egyptian)
		test &= false;
	      if (obj.key2 != 4589)
		test &= false;     
	    }
	}
      catch (gnu_obj_1& obj)
	{
	  ++j;
	  if (obj.value != egyptian)
	    test &= false;
	  if (obj.key2 != 4589)
	    test &= false;     
	}
    }
  catch (...)
    {
      j = 0;
      test &= false;
    }

  // 3 use standard library
  using namespace std;
  try
    {
      if (j < 100)
	throw invalid_argument("gdb.1");
    }
  catch (exception& obj)
    {
      if (obj.what() != "gdb.1")
	test &= false;
    }
  return 0;
}