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: no-localization
10 // UNSUPPORTED: libcpp-has-no-incomplete-format
11 // TODO FMT Evaluate gcc-11 status
12 // UNSUPPORTED: gcc-11
13
14 // Basic test to validate ill-formed code is properly detected.
15
16 // <format>
17
18 // template<class Out, class... Args>
19 // Out format_to(Out out, const locale& loc,
20 // format-string<Args...> fmt, const Args&... args);
21 // template<class Out, class... Args>
22 // Out format_to(Out out, const locale& loc,
23 // wformat-string<Args...> fmt, const Args&... args);
24
25 #include <format>
26 #include <locale>
27
28 #include "test_macros.h"
29
30 extern char* out;
31 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
32 extern wchar_t* wout;
33 #endif
34
35 // clang-format off
36
f()37 void f() {
38 std::format_to(out, std::locale(), "{"); // 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_to(out, std::locale(), "}"); // 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_to(out, std::locale(), "{}"); // 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_to(out, std::locale(), "{0}"); // 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_to(out, std::locale(), "{:-}", "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_to(out, std::locale(), "{:#}", "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_to(out, std::locale(), "{:L}", "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 std::format_to(out, std::locale(), "{0:{0}}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
60 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
61
62 std::format_to(out, std::locale(), "{:.42d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
63 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
64
65 std::format_to(out, std::locale(), "{:d}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
66 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
67
68 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
69 std::format_to(wout, std::locale(), L"{"); // 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_to(wout, std::locale(), L"}"); // 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_to(wout, std::locale(), L"{}"); // 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_to(wout, std::locale(), L"{0}"); // 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_to(wout, std::locale(), L"{:-}", 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_to(wout, std::locale(), L"{:#}", 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_to(wout, std::locale(), L"{:L}", 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
90 std::format_to(wout, std::locale(), L"{0:{0}}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
91 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
92
93 std::format_to(wout, std::locale(), L"{:.42d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
94 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
95
96 std::format_to(wout, std::locale(), L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
97 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
98 #endif
99 }
100