void test_foreach() {
using phoenix::placeholders::_1;
using phoenix::ref;
using phoenix::lambda;
int a[10][20];
int sum = 0;
//for_each(arg1, for_each_tester())(array).value_;
// Was:
// std::for_each(a, a + 10,
// bind(ll::for_each(), _1, _1 + 20,
// protect((_1 = var(sum), ++var(sum)))));
// var replaced with ref, protect(..) replaced with lambda[..], no need for bind
// phoenix algorithms are range based
std::for_each(a, a + 10,
phoenix::for_each(_1, lambda[_1 = ref(sum), ++ref(sum)]));
/*phoenix::bind(phoenix::for_each, _1,
lambda[_1 = ref(sum), ++ref(sum)]));*/
sum = 0;
// Was:
// std::for_each(a, a + 10,
// bind(ll::for_each(), _1, _1 + 20,
// protect((sum += _1))));
//
std::for_each(a, a + 10,
phoenix::for_each( _1,
lambda[(ref(sum) += _1)]));
BOOST_CHECK(sum == (199 + 1)/ 2 * 199);
}
bool Compiler::execute() {
using phoenix::ref;
using qi::lit;
using qi::no_skip;
// iterate over stream input
typedef std::istreambuf_iterator<char> base_iterator_type;
base_iterator_type in_begin(m_input);
// convert input iterator to forward iterator, usable by spirit parser
typedef spirit::multi_pass<base_iterator_type> forward_iterator_type;
forward_iterator_type fwd_begin = spirit::make_default_multi_pass(in_begin);
forward_iterator_type fwd_end;
// Initialize global scope
Scope globalScope;
StdLib::Init(globalScope);
// Parsers
ExpParser<forward_iterator_type> exp_;
CmdParser<forward_iterator_type> cmd_(exp_);
CodeParser<forward_iterator_type> code_(exp_);
typedef qi::rule<forward_iterator_type, std::string(), ascii::space_type> StringRule;
typedef qi::rule<forward_iterator_type, ascii::space_type> VoidRule;
StringRule cmdline_ =
lit('[')
> (cmd_(ref(globalScope)) | code_(ref(globalScope)))
> lit(']')
;
VoidRule program_ = +(
cmdline_[ref(m_output) << qi::_1]
> -no_skip[ lit("\n")[ref(m_output) << endl] ]
);
//BOOST_SPIRIT_DEBUG_NODE(cmdline_);
//BOOST_SPIRIT_DEBUG_NODE(program_);
bool r = qi::phrase_parse(
fwd_begin, fwd_end,
program_,
ascii::space
);
if (!r || fwd_begin != fwd_end) {
return false;
}
// Cleanup the global scope :)
m_output << globalScope.bytecode() << endl;
return r;
}
int
main()
{
using phoenix::ref;
using phoenix::arg_names::arg1;
using phoenix::arg_names::arg2;
using std::map;
using std::string;
using std::vector;
{
int x = 123;
BOOST_TEST((&arg1)(x) == &x);
//BOOST_TEST((*&arg1)(x) == 123);
int y = 968;
(ref(x) = arg1)(y);
BOOST_TEST(x == y);
(arg1 = 456)(x);
BOOST_TEST(x == 456);
int& r = (arg1 = 456)(x); // must be an lvalue
BOOST_TEST(&r == &x);
int c[] = { 1, 2, 3, 4, 5 };
BOOST_TEST((arg1[3])(c) == 4);
int& r2 = (arg1[3])(c); // must be an lvalue
BOOST_TEST(&r2 == &c[3]);
vector<string> v;
v.push_back("a");
v.push_back("b");
v.push_back("c");
v.push_back("d");
BOOST_TEST((arg1[3])(v) == "d");
map<string, int> m;
(arg1["Kimpo"] = arg2)(m, x);
BOOST_TEST(m["Kimpo"] == x);
}
return boost::report_errors();
}
bool parse_numbers(Iterator first, Iterator last, std::vector<double>& v)
{
using qi::double_;
using qi::phrase_parse;
using qi::_1;
using ascii::space;
using phoenix::push_back;
using phoenix::ref;
bool r = phrase_parse(first, last,
// Begin grammar
(
double_[push_back(ref(v), _1)] % ','
)
,
// End grammar
space);
if (first != last) // fail if we did not get a full match
return false;
return r;
}