vector : reserve(LONG_MAX)

[Alex Vinokur]

Method vector.reserve() returns no value.
How can we prevent the following situation?

====== foo.cpp ======
#include <climits>
#include <vector>
#include <iostream>
using namespace std;

int main()
{
vector<int> v (100e);
cout << v.capacity() << endl;
v.reserve(LONG_MAX);
cout << v.capacity() << endl;
return 0;
}
=====================

====== Compilation & Run ======

$ g++ -v
[---omitted---]
gcc version 3.3.1 (cygming special)

$ g++ -W -Wall foo.cpp

$ a
100
Aborted (core dumped)

===============================

 

[Peter van Merkerk]

Method vector.reserve() returns no value.
How can we prevent the following situation?

====== foo.cpp ======
#include <climits>
#include <vector>
#include <iostream>
using namespace std;

int main()
{
vector<int> v (100e);
cout << v.capacity() << endl;
v.reserve(LONG_MAX);
cout << v.capacity() << endl;
return 0;
}
=====================

====== Compilation & Run ======

$ g++ -v
[---omitted---]
gcc version 3.3.1 (cygming special)

$ g++ -W -Wall foo.cpp

$ a
100
Aborted (core dumped)

If LONG_MAX > std::vector::max_size() with your standard library
implementation it should throw a std::length_error exception.

 

[Pete Becker]

Method vector.reserve() returns no value.
How can we prevent the following situation?

====== foo.cpp ======
#include <climits>
#include <vector>
#include <iostream>
using namespace std;

int main()
{
vector<int> v (100e);
cout << v.capacity() << endl;
v.reserve(LONG_MAX);
cout << v.capacity() << endl;
return 0;
}
=====================

====== Compilation & Run ======

$ g++ -v
[---omitted---]
gcc version 3.3.1 (cygming special)

$ g++ -W -Wall foo.cpp

$ a
100
Aborted (core dumped)

===============================

Catch the exception.