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I'm trying to use vectors with GMP. But when I compile anything like this, I get "[...]\bits\vector.tcc [Error] array must be initialized with a brace-enclosed initializer". Any data structure with dynamic size works - a deque would be best but I had even more errors popping up when I tried that. How do I make this stop failing?

#include <vector>
#include <gmp.h>

int main(){
mpz_t test;
mpz_init(test);
std::vector<mpz_t> a_vector;
a_vector.push_back(test);
return 0;
}
Spitemaster
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1 Answers1

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Since GMP numbers are not directly assignable (in other words, you can't do mpz_t test = 0;' ormpz_t test1l; test1 = test;`, I don't believe they can be used in standard C++ container types.

If you want to do that, you may want to use the C++ interface for GMP instead: https://gmplib.org/manual/C_002b_002b-Interface-General.html

Mats Petersson
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  • Or, if the OP wants to stay away from the GMP C++ wrapper, then maybe [`boost::multiprecision`](http://www.boost.org/doc/libs/1_55_0/libs/multiprecision/doc/html/boost_multiprecision/intro.html) is a good and generic alternative. – Mihai Todor Mar 26 '14 at 11:50