哪个向量抛出索引超出范围异常？

Question

我想访问对std::vector 的引用，它会引发超出范围的异常，或者至少是引发异常的行号（类似于Java 的堆栈跟踪）。这是一个示例程序：

#include <iostream>
#include <vector>
std::vector<int> vec1;
std::vector<int> vec2;
vec1.push_back(1);
vec2.push_back(2);
try
{

    std::cout << vec1.at(1) << std::endl;
    std::cout << vec2.at(1) << std::endl;
}
catch(Exception e)
{
    // e.lineNumber()? e.creator_object()?
    std::cout << "The following vector is out of range: " << ? << std::endl;
    // or...
    std::cout << "There was an error on the following line: " << ? << std::endl;
}

我知道这个例子很简单，但我希望它能展示我正在寻找的功能。

编辑：实现，来自 g++ --version: g++ (GCC) 4.1.2 20071124 (Red Hat 4.1.2-42)

Answer 1

你需要自己做：

#include <iostream>
#include <vector>

std::vector<int> vec1;
std::vector<int> vec2;

vec1.push_back(1);
vec2.push_back(2);

try
{
    std::cout << vec1.at(1) << std::endl;
}
catch(std::exception& e)
{
    std::cout << "The following vector is out of range: " << "vec1" << std::endl;
}

try
{
    std::cout << vec2.at(1) << std::endl;
}
catch(std::exception& ex)
{
    std::cout << "The following vector is out of range: " << "vec2" << std::endl;
}