Return a new character set by subtracting
<include/boost/url/grammar/lut_chars.hpp>
friend
constexpr
lut_chars
operator-(
lut_chars const& cs0,
lut_chars const& cs1) noexcept;
This function returns a new character set which is formed from all of the characters in `cs0` which are not in `cs`.
containing all the lowercase letters which are not vowels:
constexpr lut_chars consonants = lut_chars("abcdefghijklmnopqrstuvwxyz") - "aeiou";
The new character set.
Name | Description |
---|---|
cs0 | A character set to join. |
cs1 | A character set to join. |