linux 构造函数 throw,构造函数抛出异常

#include

class bar

{

public:

bar()

{

std::cout << "bar() called" << std::endl;

}

~bar()

{

std::cout << "~bar() called" << std::endl;

}

};

class foo

{

public:

foo()

: b(new bar())

{

std::cout << "foo() called" << std::endl;

throw "throw something";

}

~foo()

{

delete b;

std::cout << "~foo() called" << std::endl;

}

private:

bar *b;

};

int main(void)

{

try {

std::cout << "heap: new foo" << std::endl;

foo *f = new foo();

} catch (const char *e) {

std::cout << "heap exception: " << e << std::endl;

}

try {

std::cout << "stack: foo" << std::endl;

foo f;

} catch (const char *e) {

std::cout << "stack exception: " << e << std::endl;

}

return 0;

}

输出：

heap: new foo

bar() called

foo() called

heap exception: throw something

stack: foo

bar() called

foo() called

stack exception: throw something

不会调用析构函数，因此，如果需要在构造函数中引发异常，则需要做很多事情(例如，清理吗？)。