reference_guides/latest/index_8cpp-example.html

#include <xtd/xtd>


auto main() -> int {

  auto items = list {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};


  xtd::println("items[xtd::index::from_start(0)] = {}", items[xtd::index::from_start(0)]);

  xtd::println("items(xtd::index {{1, false}}) = {}", items(xtd::index {1, false}));

  xtd::println("items[xtd::index {{2}}] = {}", items[xtd::index {2}]);

  xtd::println("items(xtd::index {{~3, true}}) = {}", items(xtd::index {~3, true}));

  xtd::println("items[xtd::index {{4}}] = {}", items[xtd::index {4}]);

  xtd::println("items(xtd::index {{5}}) = {}", items(xtd::index {5}));

  xtd::println("items[xtd::index {{6}}] = {}", items[xtd::index {6}]);

  xtd::println("items(xtd::index {{7}}) = {}", items(xtd::index {7}));

  xtd::println("items[xtd::index {{8}}] = {}", items[xtd::index {8}]);

  xtd::println("items(xtd::index::from_start(9)) = {}", items(xtd::index::from_start(9)));

  xtd::println();

  xtd::println("items[xtd::index::from_end(1)] = {}", items[xtd::index::from_end(1)]);

  xtd::println("items(xtd::index {{2}}, true)) = {}", items(xtd::index {2, true}));

  xtd::println("items[xtd::index {{~3}}] = {}", items[xtd::index {~3}]);

  xtd::println("items(xtd::index {{~4, false}}) = {}", items(xtd::index {~4, false}));

  xtd::println("items[xtd::index {{~5}}] = {}", items[xtd::index {~5}]);

  xtd::println("items(xtd::index {{~6}}) = {}", items(xtd::index {~6}));

  xtd::println("items[xtd::index {{~7}}] = {}", items[xtd::index {~7}]);

  xtd::println("items(xtd::index {{~8}}) = {}", items(xtd::index {~8}));

  xtd::println("items[xtd::index {{~9}}] = {}", items[xtd::index {~9}]);

  xtd::println("items(xtd::index::from_end(10)) = {}", items(xtd::index::from_end(10)));

}


// This code produces the following output :

//

// items[xtd::index::from_start(0)] = 1

// items(xtd::index {1, false}) = 2

// items[xtd::index {2}] = 3

// items(xtd::index {~3, true}) = 4

// items[xtd::index {4}] = 5

// items(xtd::index {5}) = 6

// items[xtd::index {6}] = 7

// items(xtd::index {7}) = 8

// items[xtd::index {8}] = 9

// items(xtd::index::from_start(9)) = 10


//

// items[xtd::index::from_end(1)] = 10

// items(xtd::index {2, true}) = 9

// items[xtd::index {~3}] = 8

// items(xtd::index {~4, false}) = 7

// items[xtd::index {~5}] = 6

// items(xtd::index {~6}) = 5

// items[xtd::index {~7}] = 4

// items(xtd::index {~8}) = 3

// items[xtd::index {~9}] = 2

// items(xtd::index::from_end(10)) = 1

xtd::println
auto println(FILE *file) -> void
Writes the current line terminator to the file output stream using the specified format information.
Definition println.hpp:15

xtd::index
Represents a type that can be used to index a collection either from the beginning or the end.
Definition index.hpp:38

xtd::index::from_end
static constexpr auto from_end(xtd::integer auto value)
Creates an xtd::ndex from the end of a collection at a specified index position.
Definition index.hpp:181

xtd::index::from_start
static constexpr auto from_start(xtd::integer auto value)
Creates an xtd::ndex from the start of a collection at a specified index position.
Definition index.hpp:186