mpl::string is a bidirectional sequence, not random access; c_str is a separate metafunction, not a class static

[SVN r52314]
This commit is contained in:
Eric Niebler
2009-04-11 05:48:51 +00:00
parent c7025170c7
commit 0ee68a2c76
5 changed files with 821 additions and 333 deletions

View File

@@ -17,27 +17,21 @@
#include <boost/mpl/string.hpp>
#include <boost/mpl/at.hpp>
#include <boost/mpl/long.hpp>
#include <boost/mpl/back.hpp>
#include <boost/mpl/copy.hpp>
#include <boost/mpl/size.hpp>
#include <boost/mpl/empty.hpp>
#include <boost/mpl/front.hpp>
#include <boost/mpl/clear.hpp>
#include <boost/mpl/erase.hpp>
#include <boost/mpl/insert.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/mpl/size_t.hpp>
#include <boost/mpl/advance.hpp>
#include <boost/mpl/for_each.hpp>
#include <boost/mpl/vector_c.hpp>
#include <boost/mpl/pop_back.hpp>
#include <boost/mpl/pop_front.hpp>
#include <boost/mpl/push_back.hpp>
#include <boost/mpl/joint_view.hpp>
#include <boost/mpl/insert_range.hpp>
#include <boost/mpl/back_inserter.hpp>
#include <boost/mpl/iterator_range.hpp>
#include <boost/mpl/push_front.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/detail/lightweight_test.hpp>
namespace mpl = boost::mpl;
// Accept a string as a template parameter!
@@ -64,18 +58,287 @@ struct push_char
std::string *str_;
};
void test1()
int main()
{
BOOST_TEST(0 == std::strcmp(mpl::string<'Hell','o wo','rld!'>::c_str, "Hello world!"));
BOOST_TEST((12 == mpl::size<mpl::string<'Hell','o wo','rld!'> >::type::value));
BOOST_TEST(('w' == mpl::at_c<mpl::string<'Hell','o wo','rld!'>, 6>::type::value));
// Test mpl::size of strings
{
typedef mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaa'> almost_full;
typedef mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'> full;
BOOST_MPL_ASSERT_RELATION(0, ==, (mpl::size<mpl::string<> >::value));
BOOST_MPL_ASSERT_RELATION(1, ==, (mpl::size<mpl::string<'a'> >::value));
BOOST_MPL_ASSERT_RELATION(2, ==, (mpl::size<mpl::string<'ab'> >::value));
BOOST_MPL_ASSERT_RELATION(2, ==, (mpl::size<mpl::string<'a','b'> >::value));
BOOST_MPL_ASSERT_RELATION(4, ==, (mpl::size<mpl::string<'abcd'> >::value));
BOOST_MPL_ASSERT_RELATION(5, ==, (mpl::size<mpl::string<'abcd','e'> >::value));
BOOST_MPL_ASSERT_RELATION(31, ==, (mpl::size<almost_full>::value));
BOOST_MPL_ASSERT_RELATION(32, ==, (mpl::size<full>::value));
}
// Test mpl::begin and mpl::end with strings
{
typedef mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaa'> almost_full;
typedef mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'> full;
BOOST_MPL_ASSERT((
boost::is_same<
mpl::begin<mpl::string<> >::type
, mpl::end<mpl::string<> >::type
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::begin<mpl::string<'a'> >::type
, mpl::string_iterator<mpl::string<'a'>, 0, 0>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::end<mpl::string<'a'> >::type
, mpl::string_iterator<mpl::string<'a'>, 1, 0>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::begin<almost_full>::type
, mpl::string_iterator<almost_full, 0, 0>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::end<almost_full>::type
, mpl::string_iterator<almost_full, 8, 0>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::begin<full>::type
, mpl::string_iterator<full, 0, 0>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::end<full>::type
, mpl::string_iterator<full, 8, 0>
>
));
}
// testing push_back
{
typedef mpl::push_back<mpl::string<>, mpl::char_<'a'> >::type t1;
BOOST_MPL_ASSERT((boost::is_same<t1, mpl::string<'a'> >));
typedef mpl::push_back<t1, mpl::char_<'b'> >::type t2;
BOOST_MPL_ASSERT((boost::is_same<t2, mpl::string<'ab'> >));
typedef mpl::push_back<t2, mpl::char_<'c'> >::type t3;
BOOST_MPL_ASSERT((boost::is_same<t3, mpl::string<'abc'> >));
typedef mpl::push_back<t3, mpl::char_<'d'> >::type t4;
BOOST_MPL_ASSERT((boost::is_same<t4, mpl::string<'abcd'> >));
typedef mpl::push_back<t4, mpl::char_<'e'> >::type t5;
BOOST_MPL_ASSERT((boost::is_same<t5, mpl::string<'abcd','e'> >));
typedef mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaa'> almost_full;
typedef mpl::push_back<almost_full, mpl::char_<'X'> >::type t6;
BOOST_MPL_ASSERT((boost::is_same<t6, mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaX'> >));
}
// Test mpl::next
{
typedef mpl::string<'a','bc','def','ghij'> s;
typedef mpl::begin<s>::type i0;
BOOST_MPL_ASSERT((boost::is_same<i0, mpl::string_iterator<s,0,0> >));
typedef mpl::next<i0>::type i1;
BOOST_MPL_ASSERT((boost::is_same<i1, mpl::string_iterator<s,1,0> >));
typedef mpl::next<i1>::type i2;
BOOST_MPL_ASSERT((boost::is_same<i2, mpl::string_iterator<s,1,1> >));
typedef mpl::next<i2>::type i3;
BOOST_MPL_ASSERT((boost::is_same<i3, mpl::string_iterator<s,2,0> >));
typedef mpl::next<i3>::type i4;
BOOST_MPL_ASSERT((boost::is_same<i4, mpl::string_iterator<s,2,1> >));
typedef mpl::next<i4>::type i5;
BOOST_MPL_ASSERT((boost::is_same<i5, mpl::string_iterator<s,2,2> >));
typedef mpl::next<i5>::type i6;
BOOST_MPL_ASSERT((boost::is_same<i6, mpl::string_iterator<s,3,0> >));
typedef mpl::next<i6>::type i7;
BOOST_MPL_ASSERT((boost::is_same<i7, mpl::string_iterator<s,3,1> >));
typedef mpl::next<i7>::type i8;
BOOST_MPL_ASSERT((boost::is_same<i8, mpl::string_iterator<s,3,2> >));
typedef mpl::next<i8>::type i9;
BOOST_MPL_ASSERT((boost::is_same<i9, mpl::string_iterator<s,3,3> >));
typedef mpl::next<i9>::type i10;
BOOST_MPL_ASSERT((boost::is_same<i10, mpl::string_iterator<s,4,0> >));
BOOST_MPL_ASSERT((boost::is_same<i10, mpl::end<s>::type>));
}
// Test mpl::prior
{
typedef mpl::string<'a','bc','def','ghij'> s;
typedef mpl::end<s>::type i10;
BOOST_MPL_ASSERT((boost::is_same<i10, mpl::string_iterator<s,4,0> >));
typedef mpl::prior<i10>::type i9;
BOOST_MPL_ASSERT((boost::is_same<i9, mpl::string_iterator<s,3,3> >));
typedef mpl::prior<i9>::type i8;
BOOST_MPL_ASSERT((boost::is_same<i8, mpl::string_iterator<s,3,2> >));
typedef mpl::prior<i8>::type i7;
BOOST_MPL_ASSERT((boost::is_same<i7, mpl::string_iterator<s,3,1> >));
typedef mpl::prior<i7>::type i6;
BOOST_MPL_ASSERT((boost::is_same<i6, mpl::string_iterator<s,3,0> >));
typedef mpl::prior<i6>::type i5;
BOOST_MPL_ASSERT((boost::is_same<i5, mpl::string_iterator<s,2,2> >));
typedef mpl::prior<i5>::type i4;
BOOST_MPL_ASSERT((boost::is_same<i4, mpl::string_iterator<s,2,1> >));
typedef mpl::prior<i4>::type i3;
BOOST_MPL_ASSERT((boost::is_same<i3, mpl::string_iterator<s,2,0> >));
typedef mpl::prior<i3>::type i2;
BOOST_MPL_ASSERT((boost::is_same<i2, mpl::string_iterator<s,1,1> >));
typedef mpl::prior<i2>::type i1;
BOOST_MPL_ASSERT((boost::is_same<i1, mpl::string_iterator<s,1,0> >));
typedef mpl::prior<i1>::type i0;
BOOST_MPL_ASSERT((boost::is_same<i0, mpl::string_iterator<s,0,0> >));
BOOST_MPL_ASSERT((boost::is_same<i0, mpl::begin<s>::type>));
}
// Test mpl::deref
{
typedef mpl::string<'a','bc','def','ghij'> s;
typedef mpl::begin<s>::type i0;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i0>::type, mpl::char_<'a'> >));
typedef mpl::next<i0>::type i1;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i1>::type, mpl::char_<'b'> >));
typedef mpl::next<i1>::type i2;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i2>::type, mpl::char_<'c'> >));
typedef mpl::next<i2>::type i3;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i3>::type, mpl::char_<'d'> >));
typedef mpl::next<i3>::type i4;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i4>::type, mpl::char_<'e'> >));
typedef mpl::next<i4>::type i5;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i5>::type, mpl::char_<'f'> >));
typedef mpl::next<i5>::type i6;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i6>::type, mpl::char_<'g'> >));
typedef mpl::next<i6>::type i7;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i7>::type, mpl::char_<'h'> >));
typedef mpl::next<i7>::type i8;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i8>::type, mpl::char_<'i'> >));
typedef mpl::next<i8>::type i9;
BOOST_MPL_ASSERT((boost::is_same<mpl::deref<i9>::type, mpl::char_<'j'> >));
}
// testing push_back
{
typedef mpl::push_back<mpl::string<>, mpl::char_<'a'> >::type t1;
BOOST_MPL_ASSERT((boost::is_same<t1, mpl::string<'a'> >));
typedef mpl::push_back<t1, mpl::char_<'b'> >::type t2;
BOOST_MPL_ASSERT((boost::is_same<t2, mpl::string<'ab'> >));
typedef mpl::push_back<t2, mpl::char_<'c'> >::type t3;
BOOST_MPL_ASSERT((boost::is_same<t3, mpl::string<'abc'> >));
typedef mpl::push_back<t3, mpl::char_<'d'> >::type t4;
BOOST_MPL_ASSERT((boost::is_same<t4, mpl::string<'abcd'> >));
typedef mpl::push_back<t4, mpl::char_<'e'> >::type t5;
BOOST_MPL_ASSERT((boost::is_same<t5, mpl::string<'abcd','e'> >));
typedef mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaa'> almost_full;
typedef mpl::push_back<almost_full, mpl::char_<'X'> >::type t6;
BOOST_MPL_ASSERT((boost::is_same<t6, mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaX'> >));
typedef mpl::string<'a','a','a','a','a','a','a','aaaa'> must_repack;
typedef mpl::push_back<must_repack, mpl::char_<'X'> >::type t7;
BOOST_MPL_ASSERT((boost::is_same<t7, mpl::string<'aaaa','aaaa','aaaX'> >));
}
// testing push_front
{
typedef mpl::push_front<mpl::string<>, mpl::char_<'a'> >::type t1;
BOOST_MPL_ASSERT((boost::is_same<t1, mpl::string<'a'> >));
typedef mpl::push_front<t1, mpl::char_<'b'> >::type t2;
BOOST_MPL_ASSERT((boost::is_same<t2, mpl::string<'ba'> >));
typedef mpl::push_front<t2, mpl::char_<'c'> >::type t3;
BOOST_MPL_ASSERT((boost::is_same<t3, mpl::string<'cba'> >));
typedef mpl::push_front<t3, mpl::char_<'d'> >::type t4;
BOOST_MPL_ASSERT((boost::is_same<t4, mpl::string<'dcba'> >));
typedef mpl::push_front<t4, mpl::char_<'e'> >::type t5;
BOOST_MPL_ASSERT((boost::is_same<t5, mpl::string<'e','dcba'> >));
typedef mpl::string<'aaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'> almost_full;
typedef mpl::push_front<almost_full, mpl::char_<'X'> >::type t6;
BOOST_MPL_ASSERT((boost::is_same<t6, mpl::string<'Xaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'> >));
typedef mpl::string<'aaaa','a','a','a','a','a','a','a'> must_repack;
typedef mpl::push_front<must_repack, mpl::char_<'X'> >::type t7;
BOOST_MPL_ASSERT((boost::is_same<t7, mpl::string<'Xaaa','aaaa','aaaa'> >));
}
// Test c_str<>
BOOST_TEST(0 == std::strcmp(
mpl::c_str<mpl::string<> >::value
, ""
));
BOOST_TEST(0 == std::strcmp(
mpl::c_str<mpl::string<'Hell','o wo','rld!'> >::value
, "Hell" "o wo" "rld!"
));
BOOST_TEST(0 == std::strcmp(
mpl::c_str<mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaX'> >::value
, "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaX"
));
// test using a string as a template parameter
greeting<mpl::string<'Hell','o wo','rld!'>::c_str> g;
greeting<mpl::c_str<mpl::string<'Hell','o wo','rld!'> >::value> g;
BOOST_TEST("Hello world!" == g.say_hello());
BOOST_TEST(0 == std::strcmp("", mpl::string<>::c_str));
std::string result;
mpl::for_each<mpl::string<'Hell','o wo','rld!'> >(push_char(result));
BOOST_TEST("Hello world!" == result);
@@ -85,89 +348,128 @@ void test1()
BOOST_TEST(('h' == mpl::front<mpl::string<'hi!'> >::type()));
BOOST_TEST(('!' == mpl::back<mpl::string<'hi!'> >::type()));
}
// testing push_back
void test2()
{
typedef mpl::push_back<mpl::string<>, mpl::char_<'a'> >::type t1;
BOOST_TEST(0 == std::strcmp("a", t1::c_str));
typedef mpl::push_back<t1, mpl::char_<'b'> >::type t2;
BOOST_TEST(0 == std::strcmp("ab", t2::c_str));
typedef mpl::push_back<t2, mpl::char_<'c'> >::type t3;
BOOST_TEST(0 == std::strcmp("abc", t3::c_str));
BOOST_MPL_ASSERT((boost::is_same<t3, mpl::string<'abc'> >));
typedef mpl::push_back<t3, mpl::char_<'d'> >::type t4;
BOOST_TEST(0 == std::strcmp("abcd", t4::c_str));
typedef mpl::push_back<t4, mpl::char_<'e'> >::type t5;
BOOST_TEST(0 == std::strcmp("abcde", t5::c_str));
BOOST_MPL_ASSERT((boost::is_same<t5, mpl::string<'abcd','e'> >));
typedef mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaa'> almost_full;
BOOST_TEST(0 == std::strcmp("aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaa", almost_full::c_str));
typedef mpl::push_back<almost_full, mpl::char_<'X'> >::type t6;
BOOST_TEST(0 == std::strcmp("aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaX", t6::c_str));
}
// testing push_front
void test3()
{
typedef mpl::push_front<mpl::string<>, mpl::char_<'a'> >::type t1;
BOOST_TEST(0 == std::strcmp("a", t1::c_str));
typedef mpl::push_front<t1, mpl::char_<'b'> >::type t2;
BOOST_TEST(0 == std::strcmp("ba", t2::c_str));
typedef mpl::push_front<t2, mpl::char_<'c'> >::type t3;
BOOST_TEST(0 == std::strcmp("cba", t3::c_str));
typedef mpl::push_front<t3, mpl::char_<'d'> >::type t4;
BOOST_TEST(0 == std::strcmp("dcba", t4::c_str));
typedef mpl::push_front<t4, mpl::char_<'e'> >::type t5;
BOOST_TEST(0 == std::strcmp("edcba", t5::c_str));
typedef mpl::string<'aaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'> almost_full;
BOOST_TEST(0 == std::strcmp("aaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa", almost_full::c_str));
typedef mpl::push_front<almost_full, mpl::char_<'X'> >::type t6;
BOOST_TEST(0 == std::strcmp("Xaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa" "aaaa", t6::c_str));
}
void test4()
{
// back-inserter with copy
typedef mpl::vector_c<char, 'a','b','c','d','e'> rgc;
BOOST_TEST(0 == std::strcmp("abcde", mpl::c_str<rgc>::value));
typedef mpl::copy<rgc, mpl::back_inserter<mpl::string<> > >::type str;
BOOST_TEST(0 == std::strcmp("abcde", str::c_str));
}
BOOST_TEST(0 == std::strcmp("abcde", mpl::c_str<str>::value));
// test insert_range and erase
void test5()
{
typedef mpl::string<'Hell','o wo','rld!'> hello;
typedef mpl::advance_c<mpl::begin<hello>::type, 5>::type where;
typedef mpl::string<' cru','el'> cruel;
typedef mpl::insert_range<hello, where, cruel>::type hello_cruel;
BOOST_TEST(0 == std::strcmp("Hello cruel world!", hello_cruel::c_str));
// test insert_range and erase
{
typedef mpl::string<'Hell','o wo','rld!'> hello;
typedef mpl::advance_c<mpl::begin<hello>::type, 5>::type where;
typedef mpl::string<' cru','el'> cruel;
typedef mpl::insert_range<hello, where, cruel>::type hello_cruel;
BOOST_TEST(0 == std::strcmp("Hello cruel world!", mpl::c_str<hello_cruel>::value));
typedef mpl::erase<hello, mpl::begin<hello>::type, where>::type erased1;
BOOST_TEST(0 == std::strcmp(" world!", erased1::c_str));
}
typedef mpl::erase<hello, mpl::begin<hello>::type, where>::type erased1;
BOOST_TEST(0 == std::strcmp(" world!", mpl::c_str<erased1>::value));
}
// test pop_front
{
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_front<mpl::string<'a'> >::type
, mpl::string<>
>
));
int main()
{
test1();
test2();
test3();
test4();
test5();
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_front<mpl::string<'ab'> >::type
, mpl::string<'b'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_front<mpl::string<'abc'> >::type
, mpl::string<'bc'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_front<mpl::string<'abcd'> >::type
, mpl::string<'bcd'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_front<mpl::string<'abcd','e'> >::type
, mpl::string<'bcd','e'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_front<mpl::string<'d','e'> >::type
, mpl::string<'e'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_front<mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'> >::type
, mpl::string<'aaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'>
>
));
}
// test pop_back
{
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_back<mpl::string<'a'> >::type
, mpl::string<>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_back<mpl::string<'ab'> >::type
, mpl::string<'a'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_back<mpl::string<'abc'> >::type
, mpl::string<'ab'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_back<mpl::string<'abcd'> >::type
, mpl::string<'abc'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_back<mpl::string<'abcd','e'> >::type
, mpl::string<'abcd'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_back<mpl::string<'d','e'> >::type
, mpl::string<'d'>
>
));
BOOST_MPL_ASSERT((
boost::is_same<
mpl::pop_back<mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa'> >::type
, mpl::string<'aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaaa','aaa'>
>
));
}
return boost::report_errors();
}