Re: [Boost-users] Howto bind with string_algo predicates on gcc?

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-02-01 14:55:32

AMDG

Jean-Pierre Bergamin wrote:
> Trying to compile the same code with gcc 3.4.5 gives the error:
> test.cpp:18: error: no matching function for call to `bind(<unknown type>,
> boost::arg<1> (&)(), const char[2])'
>
> Does anyone has an idea how to let bind know the "type" of the predicate
> "contains"?
>   

    typedef bool (*contains_type)(const string&, const string&);

    string_container::const_iterator s = find_if(numbers.begin(), 
numbers.end(),
        bind((contains_type)&contains<string, string>, _1, "w"));

Or better, use a function object:

struct contains {
    typedef bool result_type;
    bool operator()(const string& arg1, const string& arg2) {
        return(boost::algorithm::contains(arg1, arg2));
    }
};

In Christ,
Steven Watanabe