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1 | // Copyright 2018-2022 Emil Dotchevski and Reverge Studios, Inc. |
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 | #ifdef BOOST_LEAF_TEST_SINGLE_HEADER | |
7 | # include "leaf.hpp" | |
8 | #else | |
9 | # include <boost/leaf/result.hpp> | |
10 | # include <boost/leaf/handle_errors.hpp> | |
11 | #endif | |
12 | ||
13 | #ifdef BOOST_LEAF_BOOST_AVAILABLE | |
14 | # include <boost/config/workaround.hpp> | |
15 | #else | |
16 | # define BOOST_WORKAROUND(a,b) 0 | |
17 | #endif | |
18 | ||
19 | #include "lightweight_test.hpp" | |
20 | ||
21 | namespace leaf = boost::leaf; | |
22 | ||
23 | struct value | |
24 | { | |
25 | int x; | |
26 | ||
27 | explicit value( int x ): x(x) { }; | |
28 | ||
29 | #ifndef BOOST_LEAF_NO_CXX11_REF_QUALIFIERS | |
30 | value( value const & ) = delete; | |
31 | value( value && ) = default; | |
32 | #endif | |
33 | }; | |
34 | ||
35 | leaf::result<value> f1( bool success ) | |
36 | { | |
37 | if( success ) | |
38 | return value { 21 }; | |
39 | else | |
40 | return leaf::new_error(); | |
41 | } | |
42 | ||
43 | #if BOOST_LEAF_GNUC_STMTEXPR | |
44 | ||
45 | leaf::result<value> f2( bool success ) | |
46 | { | |
47 | return value { BOOST_LEAF_CHECK(f1(success)).x + BOOST_LEAF_CHECK(f1(success)).x }; | |
48 | } | |
49 | ||
50 | #else | |
51 | ||
52 | leaf::result<value> f2( bool success ) | |
53 | { | |
54 | BOOST_LEAF_AUTO(a, f1(success)); | |
55 | BOOST_LEAF_AUTO(b, f1(success)); | |
56 | return value { a.x + b.x }; | |
57 | } | |
58 | ||
59 | #endif | |
60 | ||
61 | leaf::result<void> f3( bool success ) | |
62 | { | |
63 | BOOST_LEAF_CHECK(f2(success)); | |
64 | return { }; | |
65 | } | |
66 | ||
67 | int main() | |
68 | { | |
69 | BOOST_TEST_EQ(f2(true).value().x, 42); | |
70 | BOOST_TEST(!f2(false)); | |
71 | BOOST_TEST(f3(true)); | |
72 | BOOST_TEST(!f3(false)); | |
73 | ||
74 | return boost::report_errors(); | |
75 | } |