Parser does not parse

Hello,

Look here:

https://paste.fedoraproject.org/488878/47991796/

Lines 441 - 471

when I remove (symbol_alpha > '=' > int_ |
all will working - or so how I expect it.

But with these lines on, I get error handler message.
Many Thanks for helping hands:

Jens

Here a snippet of the code:

              symbol_def_class %= symbol_def_class_inner;
              symbol_def_class_inner %=
                      symbol_class
                 >    symbol_alpha
                 >    symbol_of
                 >    symbol_alpha
                 >> *(
                         (symbol_alpha > '=' > int_ ) |
                         (symbol_def_class)        |
                         (symbol_def_if)
                     )
                 >    symbol_endclass
                 ;

             symbol_def_if %= symbol_def_if_inner;
             symbol_def_if_inner %=
                      symbol_if        > '(' > int_ > ')'
                 >> *(
                         (symbol_alpha > '=' > int_ ) |
                         (symbol_def_if)            |
                         (symbol_def_class)
                     )
                 >> *(    (symbol_else
                     >> *(
                         (symbol_alpha > '=' > int_ ) |
                         (symbol_def_if)            |
                         (symbol_def_class)
                         )
                     )    )
                 >    symbol_endif
                 ;


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