[#boost-urls-segments_ref-replace-05]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/segments_ref.adoc[segments_ref]::replace
:relfileprefix: ../../../
:mrdocs:


Replace segments

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/segments_ref.hpp#L554[boost/url/segments_ref.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/segments_base/iterator.adoc[iterator]
replace(
    xref:boost/urls/segments_base/iterator.adoc[iterator] pos,
    core::string_view s);
----

== Description


This function replaces the segment at        the specified position.        Reserved characters in the string are        automatically escaped.

All iterators that are equal to        `pos` or come after are invalidated.


=== Complexity

Linear in `s.size() + this‐>url().encoded_resouce().size()`.


=== Exception Safety

Strong guarantee.        Calls to allocate may throw.



== Return Value


An iterator to the replaced segment.



== Parameters


|===
| Name | Description

| *pos*
| An iterator to the segment.


| *s*
| The string to assign.


|===



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