:relfileprefix: ../../../
[#19181CDEA6EEC4DCF69558845AFF42959B14D0B7]

= Function param_view::param_view

pass:v,q[Constructor]


== Synopsis

Declared in header `</boost/url/param.hpp#L494[boost/url/param.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
template<class OptionalString>
param_view(
    string_view key,
    const OptionalString& value) noexcept;
----

== Description

pass:v,q[This constructs a parameter with a key] pass:v,q[and value.] pass:v,q[No validation is performed on the strings.]
pass:v,q[The new key and value reference]
pass:v,q[the same corresponding underlying]
pass:v,q[character buffers.]
pass:v,q[Ownership of the buffers is not transferred;]
pass:v,q[the caller is responsible for ensuring that]
pass:v,q[the assigned buffers remain valid until]
pass:v,q[they are no longer referenced.]

=== Example
[,cpp]
----
param_view qp( "key", "value" );
----

=== Postconditions
[,cpp]
----
this->key.data() == key.data() && this->value.data() == value.data() && this->has_value == true
----

=== Complexity
pass:v,q[Constant.]

=== Exception Safety
pass:v,q[Throws nothing.]



== Return Value

* `void` 


== Parameters

|===
| Name | Type 

| *key*
| `string_view`

| *value*
| ``

|===