Methods

foreach

#define foreach(...)

Iterate over elements in a loop.

iter_init

var iter_init(var self);
var iter_last(var self);

Return the initial item (or final item) in the iteration over self.

iter_next

var iter_next(var self, var curr);
var iter_prev(var self, var curr);

Given the current item curr, return the next (or previous) item in the iteration over self.

iter_type

var iter_type(var self);

Returns the type of item that can be expected to be returned by the iterable.

Examples

Usage

var x = new(Array, Int, $I(1), $I(2), $I(5));

foreach(o in x) {
  show(o); /* 1, 2, 5 */
}

Table

var prices = new(Table, String, Int);
set(prices, $S("Apple"),  $I(12));
set(prices, $S("Banana"), $I( 6));
set(prices, $S("Pear"),   $I(55));

foreach(key in prices) {
  var price = get(prices, key);
  print("Price of %$ is %$\n", key, price);
}

Iter

Iterable

The Iter class is implemented by types which can be looped over. This allows them to be used in conjunction with the foreach macro as well as various other components of Cello.

To signal that an interation has finished an iteration should return the Cello object Terminal. Due to this - the Terminal object cannot be placed inside of Tuples because it artificially shortens their length.

Definition

struct Iter {
  var (*iter_init)(var);
  var (*iter_next)(var, var);
  var (*iter_prev)(var, var);
  var (*iter_last)(var);
  var (*iter_type)(var);
};

Implementers

Array | Sequential Container
Filter | Filtered Iterable
List | Linked List
Map | Apply Function to Iterable
Range | Integer Sequence
Slice | Partial Iterable
Table | Hash table
Tree | Balanced Binary Tree
Tuple | Basic Collection
Zip | Multiple Iterator

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Cello High Level C

Methods

Examples

Iter

Definition

Implementers