:relfileprefix: ../../../../
[#748253C08DC3B24AD30AEC881354E7D8943C39A4]

= Function lut_chars::lut_chars

pass:v,q[Constructor]


== Synopsis

Declared in header `</boost/url/grammar/lut_chars.hpp#L188[boost/url/grammar/lut_chars.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
constexpr
lut_chars(const char* s) noexcept;
----

== Description

pass:v,q[This function constructs a character] pass:v,q[set which has as members, all of the]
pass:v,q[characters present in the null-terminated]
pass:v,q[string `s`.]

=== Example
[,cpp]
----
constexpr lut_chars digits = "0123456789";
----

=== Complexity
pass:v,q[Linear in `::strlen(s)`, or constant]
pass:v,q[if `s` is a constant expression.]

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



== Return Value

* `void` 


== Parameters

|===
| Name | Type 

| *s*
| ``

|===