File: mp_front_2.cpp

package info (click to toggle)
boost1.83 1.83.0-5
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 545,632 kB
  • sloc: cpp: 3,857,086; xml: 125,552; ansic: 34,414; python: 25,887; asm: 5,276; sh: 4,799; ada: 1,681; makefile: 1,629; perl: 1,212; pascal: 1,139; sql: 810; yacc: 478; ruby: 102; lisp: 24; csh: 6
file content (40 lines) | stat: -rw-r--r-- 1,067 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
// Copyright 2023 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt

#include <boost/mp11/list.hpp>

#if !defined(BOOST_MP11_HAS_TEMPLATE_AUTO)

#pragma message("Test skipped because BOOST_MP11_HAS_TEMPLATE_AUTO is not defined")
int main() {}

#else

#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>

template<auto... A> struct L1 {};
template<int... I> struct L2 {};

int main()
{
    using boost::mp11::mp_list_v;
    using boost::mp11::mp_front;
    using boost::mp11::mp_first;
    using boost::mp11::mp_false;
    using boost::mp11::mp_int;

    BOOST_TEST_TRAIT_SAME(mp_front<mp_list_v<false>>, mp_false);
    BOOST_TEST_TRAIT_SAME(mp_first<mp_list_v<false>>, mp_false);

    BOOST_TEST_TRAIT_SAME(mp_front<L1<-1, true>>, mp_int<-1>);
    BOOST_TEST_TRAIT_SAME(mp_first<L1<-1, true>>, mp_int<-1>);

    BOOST_TEST_TRAIT_SAME(mp_front<L2<0, 1>>, mp_int<0>);
    BOOST_TEST_TRAIT_SAME(mp_first<L2<0, 1>>, mp_int<0>);

    return boost::report_errors();
}

#endif