replace

Description

Replaces each value within a sequence of a given type and value with a new value.

Synopsis

template<
    typename Sequence,
    typename T
    >
typename result_of::replace<Sequence const, T>::type replace(
    Sequence const& seq, T const& old_value, T const& new_value);

Table 1.67. Parameters

Parameter	Requirement	Description
`seq`	A model of Forward Sequence, `e == old_value` is a valid expression, convertible to `bool`, for each element `e` in `seq` with type convertible to `T`	Operation's argument
`old_value`	Any type	Value to replace
`new_value`	Any type	Replacement value

Expression Semantics

replace(seq, old_value, new_value);

Return type: A model of Forward Sequence.

Semantics: Returns a new sequence with all the values of seq with new_value assigned to elements with the same type and equal to old_value.

Complexity

Constant. Returns a view which is lazily evaluated.

Header

#include <boost/fusion/algorithm/transformation/replace.hpp>
#include <boost/fusion/include/replace.hpp>

Example

assert(replace(make_vector(1,2), 2, 3) == make_vector(1,3));