Gets the value at the front of the deque without removing it.
value_type deque_peek_front(const Deque* deque);
| Name | Type | Description |
|---|---|---|
| deque | const Deque* | A pointer to the deque. |
Returns: The value from the front of the deque.
Count checking is done via assert, so if it’s needed in a production environment, it will need to be handled by the caller. The behaviour is otherwise undefined if you try and get an item from an empty deque.
DEQUE_DEFINE_H(IntDeque, int_deque, int)
DEQUE_DEFINE_C(IntDeque, int_deque, int)
IntDeque* deque = int_deque_create();
int_deque_push_front(deque, 1);
int value = int_deque_peek_front(deque);
printf("Front: %d\n", value);
// Output:
// Front: 1
int_deque_free(deque);