c++03

What is the best practice for swapping __m128i variables? The background is a compile error under Sun Studio 12.2 , which is a C++03 compiler. __m128i is an opaque type used with MMX and SSE instructions, and its usually and unsigned long long[2] . C++03 does not provide the support for swapping arrays, and std:swap(__m128i a, __m128i b) fails under the compiler. Here are some related questions that don't quite hit the mark. They don't apply because std::vector is not available. How can we swap 2 arrays in constant complexity or O(1)? Is it possible to swap arrays of structs C++03 moving a

Can I break a valid C++03 program by replacing std::vector::push_back with emplace_back and compiling it with C++ 11 compiler? From reading emplace_back reference I gather it shouldn't happen, but I'll admit I don't fully get rvalue references. I constructed a short example that actually fails to compile when push_back is replaced by emplace_back : #include <vector> struct S { S(double) {} private: explicit S(int) {} }; int main() { std::vector<S>().push_back(0); // OK std::vector<S>().emplace_back(0); // error! } The call to push_back needs to convert its argument 0 from type int to type S .

Let's say I have #include <string> #include <vector> using namespace std; struct Student { const string name; int grade; Student(const string &name) : name(name) { } }; How do I, then, keep a vector of students? int main() { vector<Student> v; // error C2582: 'operator =' function is unavailable in 'Student' v.push_back(Student("john")); } Is there even a way to do this, or must I allocate all the students on the heap, and store a pointer to each of them instead? You can't. Your type violates the "Assignable" requirement for standard containers. ISO/IEC 14882:2003 23.1 [lib.container

As per this answer , I tried printing a uint64_t , but it gives me an error: error: expected ``)' before 'PRIu64' Following is the minimal code showing what I am trying to do: #define __STDC_FORMAT_MACROS #include <inttypes.h> #include <cstdio> class X { X() { uint64_t foo = 0; printf("%07" PRIu64 ": ", foo); } }; int main() {} This minimal code compiles, but my actual code does not. However, I have tried with the 2 lines inside X::X() exactly the same in my actual code, and that does not work. What should I look for to debug this further? My actual code also #include s other headers. Could

I've got a two-dimension string vector that I need to print out. The whole program should read a line from a txt file, store each word from it as a different element and then push the "word vector" into a vector that contains for example 100 lines. I've got everything going, but the problem comes out when I have to print the vector. Every line can have a different number of words, ex: I like cake a lot. So I can't use: for (int i = 0; i < 2; i++) { for (int j = 0; j < 3; j++) { cout << vec[i][j]; } } because the second line doesn't contain 3 elements and the program closes. Any idea how to do

Given an example: #include <iostream> class A { public: static const int numberOfWheels = 4; }; // const int A::numberOfWheels; int main() { std::cout << A::numberOfWheels << std::endl; } Is it formally undefined behavior( UB ) since A::numberOfWheels is used without its definition? (see also here ). As C++03 states: The member shall still be defined in a namespace scope if it is used in the program and the namespace scope definition shall not contain an initializer. I found that definition of used in C++03 is rather confusing, as it points to potentially-evaluated expression: An object or non