[#boost-urls-params_encoded_base-find-0d]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/params_encoded_base.adoc[params_encoded_base]::find
:relfileprefix: ../../../
:mrdocs:


== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_encoded_base.hpp#L379[boost/url/params_encoded_base.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_encoded_base/iterator.adoc[iterator]
xref:boost/urls/params_encoded_base/find-03.adoc[find](
    xref:boost/urls/pct_string_view.adoc[pct_string_view] key,
    xref:boost/urls/ignore_case_param.adoc[ignore_case_param] ic = {}) const noexcept;
----

[.small]#xref:boost/urls/params_encoded_base/find-03.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_encoded_base/iterator.adoc[iterator]
xref:boost/urls/params_encoded_base/find-00.adoc[find](
    xref:boost/urls/params_encoded_base/iterator.adoc[iterator] from,
    xref:boost/urls/pct_string_view.adoc[pct_string_view] key,
    xref:boost/urls/ignore_case_param.adoc[ignore_case_param] ic = {}) const noexcept;
----

[.small]#xref:boost/urls/params_encoded_base/find-00.adoc[_» more..._]#

== Exceptions


|===
| Name | Thrown on

| `system_error`
| `key` contains an invalid percent‐encoding.


|===

== Parameters


|===
| Name | Description

| *key*
| The key to match.        By default, a case‐sensitive        comparison is used.


| *ic*
| An optional parameter. If        the value xref:boost/urls/ignore_case.adoc[ignore_case] is passed        here, the comparison is        case‐insensitive.


| *from*
| The position to begin the            search from. This can be `end()`.


|===



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