Constant Accessors (constant_da)

Definition

An instance ca of class constant_da<T> is bound to a specific value of type T, and the function get(ca,it) simply returns this value for each iterator.

Creation

constant_da<T>	ca(T t);	introduces a variable ca of this class bound to the given value t.

Operations

T	get(constant_da<T> ca, Iter it)
		returns the value to which ca is bound.

Example

With the template function of sect. node_array_da we can write a function that counts the number of nodes in a graph:

  int count_all(graph G) {
    constant_da<color> Color(red);
    return count_red_t(G,Color); }