conjunctions_of_bind.cc

// http://stackoverflow.com/questions/2638781/c-conjunction-of-binds
// $ g++ -Wall -pedantic conjunctions_of_bind.cc -o conjunctions_of_bind 
// $ ./conjunctions_of_bind
#include <cstdlib> // atoi
#include <cstring> // strcmp

#include <boost/bind.hpp>
#include <boost/function.hpp>
#include <boost/test/minimal.hpp>

namespace {
  bool match1(const char* a, const char* b) {
    return (std::strcmp(a, b) == 0);
  }

  bool match2(int a, const char* b) {
    return (std::atoi(b) == a);
  }
}

int test_main(int, char*[]) {
  boost::function<bool(const char *, const char *)> f =                 \
    boost::bind(match1, "a test", _1) && boost::bind(match2, 42, _2);

  BOOST_CHECK( f("a test", "42")  );
  BOOST_CHECK( !f("a test", "43") );
  BOOST_CHECK( !f("atest", "42")  );
  BOOST_CHECK( !f("42", "a test") );

  return 0;
}