Find the first character in the string that is in the set.
Synopsis
Declared in header <boost/url/grammar/charset.hpp>
template<class CharSet>
char const*
find_if(
    char const const* first,
    char const const* last,
    CharSet const& cs) noexcept;
Description
Exception Safety
Throws nothing.
Return Value
A pointer to the found character,
otherwise the value last.
Parameters
| Name | Description | 
|---|---|
first  | 
A pointer to the first character in the string to search.  | 
last  | 
A pointer to one past the last character in the string to search.  | 
cs  | 
The character set to use.  |