Thank you Hartmut, really helpful. On 17 January 2011 17:24, Hartmut Kaiser wrote:

...

I'm trying to write a small example using spirit.

I can write a rule in this way:

my_rule = lit("example") | lit("example2");

Also in this way:

std::string ex("example") std::string ex2("example2"); my_rule = lit(ex) | lit(ex2))

Is there a way to do this: std::string ex("example") std::string ex2("example2"); my_rule = lit(ex); my_rule = my_rule | lit(ex2));

Make that:

my_rule = my_rule.copy() | lit(ex2));

and it will work. The explicit copy is needed, as in this context rules are always held by reference.

...

I need to append strings from an array... Maybe I miss something from docs.

But since you seem to have only a bunch of strings to match, why don't you use a symbol table (see qi::symbols). This is not only easier to set up iteratively, it's more efficient at runtime as well.

Regards Hartmut --------------- http://boost-spirit.com

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