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The character based token definitions described in this section are:
            The char_ creates token
            definitions matching single characters. The char_
            token definition is associated standard
            encoding namespace. This is needed when doing basic operations such as
            forcing lower or upper case and dealing with character ranges.
          
// forwards to <boost/spirit/home/lex/lexer/char_token_def.hpp> #include <boost/spirit/include/lex_char_token_def.hpp>
Also, see Include Structure.
| Name | 
|---|
| 
                       | 
Notation
ch
                  Character-class specific character from standard
                  character set.
                
            Semantics of an expression is defined only where it differs from, or
            is not defined in PrimitiveLexer.
          
| Expression | Description | 
|---|---|
| 
                       | 
                      Create a token definition matching the character literal  | 
| 
                       | 
                      Create a token definition matching the character  |