[#boost-urls-segments_encoded_ref-replace-06]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/segments_encoded_ref.adoc[segments&lowbar;encoded&lowbar;ref]::replace
:relfileprefix: ../../../
:mrdocs:

Replace segments

== Synopsis

Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/segments_encoded_ref.hpp#L630[boost&sol;url&sol;segments&lowbar;encoded&lowbar;ref&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/segments_encoded_base/iterator.adoc[iterator]
replace(
    xref:boost/urls/segments_encoded_base/iterator.adoc[iterator] from,
    xref:boost/urls/segments_encoded_base/iterator.adoc[iterator] to,
    xref:boost/urls/pct_string_view.adoc[pct&lowbar;string&lowbar;view] s);
----

== Description

This function replaces a range of segments with one segment&period; Reserved characters in the string are automatically escaped&period; Escapes in the string are preserved&period;

All iterators that are equal to `from` or come after are invalidated&period;

== Complexity
Linear in `s&period;size() &plus; this&hyphen;&gt;url()&period;encoded&lowbar;resouce()&period;size()`&period;

== Exception Safety
Strong guarantee&period; Calls to allocate may throw&period; Exceptions thrown on invalid input&period;

== Exceptions

[cols=2]
|===
| Name
| Thrown on
| `system&lowbar;error`
| The string contains an invalid percent&hyphen;encoding&period;
|===

== Return Value

An iterator to the new segment&period;

== Parameters

[cols=2]
|===
| Name
| Description
| *from*
| The first element in the range of segments to replace&period;
| *to*
| One past the last element in the range of segments to replace&period;
| *s*
| The string to assign&period;
|===


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