Function string_as_array

be/src/gutil/stl_util.h:350–353

Return a mutable char* pointing to a string's internal buffer, which may not be null-terminated. Writing through this pointer will modify the string. string_as_array(&str)[i] is valid for 0 <= i < str.size() until the next call to a string method that invalidates iterators. Prior to C++11, there was no standard-blessed way of getting a mutable reference to a string's internal buffer. The require

// According to Matt Austern, this should already work on all current C++98
// implementations.
inline char* string_as_array(string* str) {
  // DO NOT USE const_cast<char*>(str->data())! See the unittest for why.
  return str->empty() ? NULL : &*str->begin();
}

// These are methods that test two hash maps/sets for equality.  These exist
// because the == operator in the STL can return false when the maps/sets