1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03
10
11 // check that <limits> functions are marked [[nodiscard]]
12
13 #include <limits>
14
15 #include "test_macros.h"
16
func()17 void func() {
18 // clang-format off
19 // arithmetic
20 std::numeric_limits<int>::min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
21 std::numeric_limits<int>::max(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
22 std::numeric_limits<int>::lowest(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
23 std::numeric_limits<int>::epsilon(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
24 std::numeric_limits<int>::round_error(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
25 std::numeric_limits<int>::infinity(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
26 std::numeric_limits<int>::quiet_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
27 std::numeric_limits<int>::signaling_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
28 std::numeric_limits<int>::denorm_min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
29 // bool
30 std::numeric_limits<bool>::min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
31 std::numeric_limits<bool>::max(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
32 std::numeric_limits<bool>::lowest(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
33 std::numeric_limits<bool>::epsilon(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
34 std::numeric_limits<bool>::round_error(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
35 std::numeric_limits<bool>::infinity(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
36 std::numeric_limits<bool>::quiet_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
37 std::numeric_limits<bool>::signaling_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
38 std::numeric_limits<bool>::denorm_min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
39 // float
40 std::numeric_limits<float>::min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
41 std::numeric_limits<float>::max(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
42 std::numeric_limits<float>::lowest(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
43 std::numeric_limits<float>::epsilon(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
44 std::numeric_limits<float>::round_error(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
45 std::numeric_limits<float>::infinity(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
46 std::numeric_limits<float>::quiet_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
47 std::numeric_limits<float>::signaling_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
48 std::numeric_limits<float>::denorm_min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
49 // double
50 std::numeric_limits<double>::min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
51 std::numeric_limits<double>::max(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
52 std::numeric_limits<double>::lowest(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
53 std::numeric_limits<double>::epsilon(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
54 std::numeric_limits<double>::round_error(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
55 std::numeric_limits<double>::infinity(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
56 std::numeric_limits<double>::quiet_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
57 std::numeric_limits<double>::signaling_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
58 std::numeric_limits<double>::denorm_min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
59 // long double
60 std::numeric_limits<long double>::min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
61 std::numeric_limits<long double>::max(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
62 std::numeric_limits<long double>::lowest(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
63 std::numeric_limits<long double>::epsilon(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
64 std::numeric_limits<long double>::round_error(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
65 std::numeric_limits<long double>::infinity(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
66 std::numeric_limits<long double>::quiet_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
67 std::numeric_limits<long double>::signaling_NaN(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
68 std::numeric_limits<long double>::denorm_min(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
69 // clang-format on
70 }
71