[#boost-urls-params_encoded_view-2constructor]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/params_encoded_view.adoc[params_encoded_view]::params_encoded_view
:relfileprefix: ../../../
:mrdocs:


Constructor

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/params_encoded_view.hpp#L91[boost/url/params_encoded_view.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:boost/urls/params_encoded_view/2constructor-02.adoc[params_encoded_view]() = default;
----

[.small]#xref:boost/urls/params_encoded_view/2constructor-02.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:boost/urls/params_encoded_view/2constructor-06.adoc[params_encoded_view](xref:boost/urls/params_encoded_view.adoc[params_encoded_view] const& other) = default;
----

[.small]#xref:boost/urls/params_encoded_view/2constructor-06.adoc[_» more..._]#

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/params_encoded_view/2constructor-0c.adoc[params_encoded_view](core::string_view s);
----

[.small]#xref:boost/urls/params_encoded_view/2constructor-0c.adoc[_» more..._]#

== Description


Default‐constructed params have        zero elements.


=== Example

[,cpp]
----
params_encoded_view qp;
----

=== Effects

[,cpp]
----
return params_encoded_view( "" );
----

=== Complexity

Constant.


=== Exception Safety

Throws nothing.



== Exceptions


|===
| Name | Thrown on

| `system_error`
| `s` contains an invalid query parameter        string.


|===

== Parameters


|===
| Name | Description

| *s*
| The string to parse.


|===



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