| 1 | // Copyright (c) 2016 Jeffrey E. Trull |
|---|---|
| 2 | // |
| 3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 5 | |
| 6 | // A series of simple tests for the istream_iterator |
| 7 | |
| 8 | #include <boost/spirit/include/support_istream_iterator.hpp> |
| 9 | |
| 10 | #include <boost/core/lightweight_test.hpp> |
| 11 | #include <sstream> |
| 12 | |
| 13 | int main() |
| 14 | { |
| 15 | std::stringstream ss("HELO\n"); |
| 16 | boost::spirit::istream_iterator it(ss); |
| 17 | |
| 18 | // Check iterator concepts |
| 19 | boost::spirit::istream_iterator it2(it); // CopyConstructible |
| 20 | BOOST_TEST( it2 == it ); // EqualityComparable |
| 21 | BOOST_TEST( *it2 == 'H' ); |
| 22 | |
| 23 | boost::spirit::istream_iterator end; // DefaultConstructible |
| 24 | BOOST_TEST( it != end ); |
| 25 | it = end; // CopyAssignable |
| 26 | BOOST_TEST( it == end ); |
| 27 | |
| 28 | std::swap(a&: it, b&: it2); // Swappable |
| 29 | BOOST_TEST( it2 == end ); |
| 30 | BOOST_TEST( *it == 'H' ); |
| 31 | |
| 32 | ++it; |
| 33 | BOOST_TEST( *it == 'E' ); |
| 34 | BOOST_TEST( *it++ == 'E' ); |
| 35 | |
| 36 | // "Incrementing a copy of a does not change the value read from a" |
| 37 | boost::spirit::istream_iterator it3 = it; |
| 38 | BOOST_TEST( *it == 'L' ); |
| 39 | BOOST_TEST( *it3 == 'L' ); |
| 40 | ++it; |
| 41 | BOOST_TEST( *it == 'O' ); |
| 42 | BOOST_TEST( *it3 == 'L' ); |
| 43 | |
| 44 | it3 = it; |
| 45 | // "a == b implies ++a == ++b" |
| 46 | BOOST_TEST( ++it3 == ++it ); |
| 47 | |
| 48 | // Usage of const iterators |
| 49 | boost::spirit::istream_iterator const itc = it; |
| 50 | BOOST_TEST( itc == it ); |
| 51 | BOOST_TEST( *itc == *it ); |
| 52 | ++it; |
| 53 | BOOST_TEST( itc != it ); |
| 54 | |
| 55 | // Skipping le/gt comparisons as unclear what they are for in forward iterators... |
| 56 | |
| 57 | return boost::report_errors(); |
| 58 | } |
| 59 | // Destructible |
| 60 |