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From: Slava Akhmechet (yg-boost-users_at_[hidden])
Date: 2003-05-09 02:59:31
I am playing around with Spirit and I seem to run into an architecture problem with semantic actions. Here's a small example.
class MyGrammar : public grammar<MyGrammar>
{
public:
template <typename ScannerT>
struct definition
{
definition(MyGrammar const& self)
{
TestRule = str_p("test")[&my_action];
}
rule<ScannerT> const&
start() const { return TestRulet; };
private:
rule<ScannerT> TestRule;
};
};
My major problem is related to the fact that I cannot pass any custom data to my_action function. Since my_action is a global function, it has no knowledge of MyGrammar and must rely on global variables. Ideally, I would pass self to my_action to be able to hold state. What is a general way to get around this problem? The documention mentions a way to specify member functions as semantic action actors using boost's bind facilities but I was unable to get it to work.
Thanks in advance.
P.S. Sorry for a fairly newbie question, I was unable to find the answer online or in the docs.
P.P.S. I might have accidently double posted this. Sorry about that.
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