[#boost-urls-grammar-lut_chars-2constructor-079]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/grammar.adoc[grammar]::xref:boost/urls/grammar/lut_chars.adoc[lut&lowbar;chars]::lut&lowbar;chars
:relfileprefix: ../../../../
:mrdocs:

Constructor

== Synopsis

Declared in `&lt;https://www.github.com/boostorg/url/blob/develop/include/boost/url/grammar/lut_chars.hpp#L157[boost&sol;url&sol;grammar&sol;lut&lowbar;chars&period;hpp]&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
lut&lowbar;chars(char ch) noexcept;
----

== Description

This function constructs a character set which has as a single member, the character `ch`&period;

== Example

[,cpp]
----
constexpr lut_chars asterisk( '*' );
----
== Complexity

Constant&period;

== Exception Safety

Throws nothing&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ch*
| A character&period;
|===


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