Read file into std::string

slurp.hpp

#pragma once

#include <fstream>
#include <string>
#include <system_error>
#include <iterator>

inline std::string slurp(const std::string& path) {
  constexpr auto flags = std::ios::in | std::ios::binary;
  if (auto fp = std::ifstream(path, flags); fp) {
    return {std::istreambuf_iterator<char>{fp},
            std::istreambuf_iterator<char>{}};
  } else {
    throw std::system_error(errno, std::system_category(), path);
  }
}