1 //===----------------------------------------------------------------------===//
2 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
3 // See https://llvm.org/LICENSE.txt for license information.
4 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5 //
6 //===----------------------------------------------------------------------===//
7
8 // UNSUPPORTED: c++03, c++11, c++14, c++17
9 // UNSUPPORTED: libcpp-has-no-incomplete-format
10 // TODO FMT Evaluate gcc-11 status
11 // UNSUPPORTED: gcc-11
12
13 // Basic test to validate ill-formed code is properly detected.
14
15 // <format>
16
17 // template<class... Args>
18 // string format(format-string<Args...> fmt, const Args&... args);
19 // template<class... Args>
20 // wstring format(wformat-string<Args...> fmt, const Args&... args);
21
22 #include <format>
23
24 #include "test_macros.h"
25
26 // clang-format off
27
f()28 void f() {
29 std::format("{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
30 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
31
32 std::format("}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
33 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
34
35 std::format("{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
36 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
37
38 std::format("{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
39 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
40
41 std::format("{:-}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
42 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
43
44 std::format("{:#}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
45 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
46
47 std::format("{:L}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
48 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
49
50 std::format("{0:{0}}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
51 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
52
53 std::format("{:.42d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
54 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
55
56 std::format("{:d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
57 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
58
59 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
60 std::format(L"{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
61 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
62
63 std::format(L"}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
64 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
65
66 std::format(L"{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
67 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
68
69 std::format(L"{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
70 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
71
72 std::format(L"{:-}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
73 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
74
75 std::format(L"{:#}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
76 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
77
78 std::format(L"{:L}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
79 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
80
81 std::format(L"{0:{0}}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
82 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
83
84 std::format(L"{:.42d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
85 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
86
87 std::format(L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
88 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
89 #endif
90 }
91
92 struct tiny {
93 int bit : 1;
94 };
95
P2418()96 void P2418()
97 {
98 auto t = tiny{};
99 std::format("{}", t.bit); // expected-error{{non-const reference cannot bind to bit-field 'bit'}}
100
101 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
102 std::format(L"{}", t.bit); // expected-error{{non-const reference cannot bind to bit-field 'bit'}}
103 #endif
104 }
105