ASTinternal.h

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#pragma once
 
#include "ASTNode.h"
 
#include <algorithm>
 
template <typename T>
std::vector<T *> rawRefs(const std::vector<std::shared_ptr<T>> &v) {
  std::vector<T *> r;
 
  /*
   * This call passes an anonymous function, i.e., a lambda, that is
   * applied to each element in the input vector.   The result of that
   * application is used to build up the output vector.  If you haven't
   * seen lambda's before in C++ they are denoted by the "[]" syntax.
   */
  std::transform(v.begin(), v.end(), std::back_inserter(r),
                 [](auto &up) { return up.get(); });
  return r;
}