Return true if ch is in the character set.
<boost/url/grammar/lut_chars.hpp>
constexpr
bool
operator()(unsigned char ch) const noexcept;
This function returns true if the character ch is in the set, otherwise it returns false.
Constant.
Throws nothing.
true if ch is in the set.
| Name | Description | 
|---|---|
| ch | The character to test. |