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##### Character Parsers

Expression | Attribute | Description
--- | --- | ---
`ch` | `Unused` | Matches `ch`
`lit(ch)` | `Unused` | Matches `ch`
`char_` | `Ch` | Matches any character
`char_(ch)` | `Ch` | Matches `ch`
`char_("c")` | `Ch` | Matches a single char string literal, `c`
`char_(ch, ch2)` | `Ch` | Matches a range of chars from `ch` to `ch2` (inclusive)
`char_(charset)` | `Ch` | Matches a character set `charset`
`alnum` | `Ch` | Matches a character based on the equivalent of `std::isalnum` in the current character set
`alpha` | `Ch` | Matches a character based on the equivalent of `std::isalpha` in the current character set
`blank` | `Ch` | Matches a character based on the equivalent of `std::isblank` in the current character set
`cntrl` | `Ch` | Matches a character based on the equivalent of `std::iscntrl` in the current character set
`digit` | `Ch` | Matches a character based on the equivalent of `std::isdigit` in the current character set
`graph` | `Ch` | Matches a character based on the equivalent of `std::isgraph` in the current character set
`print` | `Ch` | Matches a character based on the equivalent of `std::isprint` in the current character set
`punct` | `Ch` | Matches a character based on the equivalent of `std::ispunct` in the current character set
`space` | `Ch` | Matches a character based on the equivalent of `std::isspace` in the current character set
`xdigit` | `Ch` | Matches a character based on the equivalent of `std::isxdigit` in the current character set
`lower` | `Ch` | Matches a character based on the equivalent of `std::islower` in the current character set
`upper` | `Ch` | Matches a character based on the equivalent of `std::isupper` in the current character set