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#include <vector>
#include <fstream>
 
void foo() {
  std::ifstream stream("file.txt");
  std::vector<char> str(std::istreambuf_iterator<char>(stream),
                        std::istreambuf_iterator<char>(stream));
  char* m_str = str.data();
}
 

prog.cpp: In function ‘void foo()’:
prog.cpp:7: error: multiple parameters named ‘stream’
prog.cpp:8: error: request for member ‘data’ in ‘str’, which is of non-class type ‘std::vector<char, std::allocator<char> > ()(std::istreambuf_iterator<char, std::char_traits<char> >, std::istreambuf_iterator<char, std::char_traits<char> >)’
prog.cpp:8: warning: unused variable ‘m_str’

Standard output is empty