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


Constructor

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/decode_view.hpp#L199[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


|===
| 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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