replace
 |
 |
| Category: algorithms |
Component type: function |
Prototype
template <class ForwardIterator, class T>
void replace(ForwardIterator first, ForwardIterator last, const T& old_value,
const T& new_value)
Description
Replace replaces every element in the range [first, last)
equal to old_value with new_value. That is: for every iterator i,
if *i == old_value then it performs the assignment *i = new_value.
Definition
Defined in the standard header algorithm, and in the nonstandard
backward-compatibility header algo.h.
Requirements on types
-
ForwardIterator is a model of Forward Iterator.
-
ForwardIterator is mutable.
-
T is convertible to ForwardIterator's value type.
-
T is Assignable.
-
T is EqualityComparable, and may be compared for equality with
objects of ForwardIterator's value type.
Preconditions
-
[first, last) is a valid range.
Complexity
Linear. Replace performs exactly last - first comparisons for
equality, and at most last - first assignments.
Example
vector<int> V;
V.push_back(1);
V.push_back(2);
V.push_back(3);
V.push_back(1);
replace(V.begin(), V.end(), 1, 99);
assert(V[0] == 99 && V[3] == 99);
Notes
See also
replace_if, replace_copy, replace_copy_if
STL Home