[#boost-urls-decode_view-2constructor-03]
= xref:boost/urls/decode_view/2constructor-03.adoc[boost::urls::decode_view::decode_view]
:relfileprefix: ../../../
:mrdocs:

Constructor

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/decode_view.hpp#L195[boost/url/decode_view.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
explicit
decode_view(
    xref:boost/urls/pct_string_view.adoc[pct_string_view] s,
    xref:boost/urls/encoding_opts.adoc[encoding_opts] opt = {}) noexcept;
----

== Description

This constructs a view from the character buffer `s`, which must remain valid and unmodified until the view is no longer accessed.

== Example
[,cpp]
----
decode_view ds( "Program%20Files" );
----
== Postconditions
[,cpp]
----
this->encoded() == s
----
== Complexity
Linear in `s.size()`.

== Exception Safety
Although this function does not throw exceptions, implicitly constructing a xref:boost/urls/pct_string_view.adoc[`pct_string_view`] for the first argument can throw exceptions on invalid input.

== Parameters

[cols=2]
|===
| Name
| Description
| *s*
| A percent‐encoded string that has already been validated. Implicit conversion from other string types is supported but may throw exceptions.
| *opt*
| The options for decoding. If this parameter is omitted, the default options are used.
|===


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