How to get the address of the std::vector buffer start most elegantly?

Question

I want to use std::vector for dynamically allocating memory. The scenario is:

int neededLength = computeLength(); // some logic here

// this will allocate the buffer     
std::vector<TCHAR> buffer( neededLength );

// call a function that accepts TCHAR* and the number of elements
callFunction( &(buffer[0]), buffer.size() );

The code above works, but this &(buffer[0]) looks ugly. Is there a more elegant way to achieve the same?

Answer 1

It's really odd that nobody know this!!! in C++11 you could use:

buffer.data()

it could get the address of the vector I have test it:

vector<char>buffer;
buffer.push_back('w');
buffer.push_back('h');
buffer.push_back('a');
buffer.push_back('t');
buffer.push_back('\0');
char buf2[10];
memcpy(buf2,buffer.data(),10);

Specification here.