Header utils.hpp

<class InputIt, class Fn> it_transform

Iterator to transform a range.

it_transform(InputIt begin, InputIt end, Fn fn)

Constructor.

class iterator

iterator begin()

iterator end()

In general, an input iterator.

void reset_src_iterator(InputIt begin, InputIt end)

Provide a new range of iterator so it can be iterated again with the same transformer function.

---

This helper can be used to do a select operation to create a new pair of iterators based on existing iterators that are inconvenient to modify:

int arr[] = {1, 0, 0, 0, 2, 9};
it_transform mapped {std::begin(arr), std::end(arr), [](int i) -> const char * {
  return i ? "true" : "nil";
}};

auto tab = make_tabulate<6, 6>(
  static_ansi_style_options_none,
  tabulate_title_row_args{std::begin(arr), std::end(arr), static_ansi_style_options_none},
  tabulate_elem_row_args{std::begin(mapped), static_ansi_style_options_none}
);
for (auto sv : tab) {
  puts(sv.data());
}

The output is:

+------------------------------------+
|  1     0     0     0     2     9   |
+------------------------------------+
| true  nil   nil   nil   true  true |
+------------------------------------+