//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// <iterator>

// __libcpp_is_trivial_iterator<Tp>

// __libcpp_string_gets_noexcept_iterator determines if an iterator can be used
// w/o worrying about whether or not certain operations can throw.
// This gives us a "fast path for string operations"
//

#include <iterator>
#include <cassert>
#include <string>
#include <vector>
#include <initializer_list>

#include "test_macros.h"
#include "test_iterators.h"

#ifndef TEST_HAS_NO_EXCEPTIONS
static const bool expected = false;
#else
// Under libcpp-no-exceptions all noexcept expressions are trivially true, so
// any check for a noexcept returning false must actually check for it being
// true.
static const bool expected = true;
#endif

int main()
{
//  basic tests
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<char *>::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<const char *>::value), "");

    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::move_iterator<char *> >      ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::move_iterator<const char *> >::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::reverse_iterator<char *> >      ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::reverse_iterator<const char *> >::value), "");

    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::__wrap_iter<char *> >      ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::__wrap_iter<const char *> >::value), "");

    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::reverse_iterator<std::__wrap_iter<char *> > > ::value), "");

//  iterators in the libc++ test suite
    static_assert(std::__libcpp_string_gets_noexcept_iterator<output_iterator       <char *> >::value == expected, "");
    static_assert(std::__libcpp_string_gets_noexcept_iterator<input_iterator        <char *> >::value == expected, "");
    static_assert(std::__libcpp_string_gets_noexcept_iterator<forward_iterator      <char *> >::value == expected, "");
    static_assert(std::__libcpp_string_gets_noexcept_iterator<bidirectional_iterator<char *> >::value == expected, "");
    static_assert(std::__libcpp_string_gets_noexcept_iterator<random_access_iterator<char *> >::value == expected, "");
    static_assert(std::__libcpp_string_gets_noexcept_iterator<ThrowingIterator      <char *> >::value == expected, "");

#if TEST_STD_VER >= 11
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<NonThrowingIterator   <char *> >::value), "");
#else
    static_assert(std::__libcpp_string_gets_noexcept_iterator<NonThrowingIterator   <char *> >::value == expected, "");
#endif

//
//  iterators from libc++'s containers
//

//  string
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::vector<char>::iterator>              ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::vector<char>::const_iterator>        ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::vector<char>::reverse_iterator>      ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::vector<char>::const_reverse_iterator>::value), "");

//  vector
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::basic_string<char>::iterator>              ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::basic_string<char>::const_iterator>        ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::basic_string<char>::reverse_iterator>      ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::basic_string<char>::const_reverse_iterator>::value), "");

#if TEST_STD_VER >= 11
//  Initializer list  (which has no reverse iterators)
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::initializer_list<char>::iterator>              ::value), "");
    static_assert(( std::__libcpp_string_gets_noexcept_iterator<std::initializer_list<char>::const_iterator>        ::value), "");
#endif
}