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Diffstat (limited to 'libs/local_function/example/phoenix_factorial_local.cpp')
-rw-r--r-- | libs/local_function/example/phoenix_factorial_local.cpp | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/libs/local_function/example/phoenix_factorial_local.cpp b/libs/local_function/example/phoenix_factorial_local.cpp new file mode 100644 index 000000000..c52c094b5 --- /dev/null +++ b/libs/local_function/example/phoenix_factorial_local.cpp @@ -0,0 +1,31 @@ + +// Copyright (C) 2009-2012 Lorenzo Caminiti +// Distributed under the Boost Software License, Version 1.0 +// (see accompanying file LICENSE_1_0.txt or a copy at +// http://www.boost.org/LICENSE_1_0.txt) +// Home at http://www.boost.org/libs/local_function + +#include <boost/local_function.hpp> +#include <boost/function.hpp> +#include <boost/phoenix/core.hpp> +#include <boost/phoenix/function.hpp> +#include <boost/detail/lightweight_test.hpp> + +//[phoenix_factorial_local +int main(void) { + using boost::phoenix::arg_names::arg1; + + int BOOST_LOCAL_FUNCTION(int n) { // Unfortunately, monomorphic. + return (n <= 0) ? 1 : n * factorial_impl(n - 1); + } BOOST_LOCAL_FUNCTION_NAME(recursive factorial_impl) + + boost::phoenix::function< boost::function<int (int)> > + factorial(factorial_impl); // Phoenix function from local function. + + int i = 4; + BOOST_TEST(factorial(i)() == 24); // Call. + BOOST_TEST(factorial(arg1)(i) == 24); // Lazy call. + return boost::report_errors(); +} +//] + |