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 Out, class... Args>
18 // format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
19 // format-string<Args...> fmt, const Args&... args);
20 // template<class Out, class... Args>
21 // format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
22 // wformat-string<Args...> fmt, const Args&... args);
23
24 #include <format>
25
26 #include "test_macros.h"
27
28 extern char* out;
29 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
30 extern wchar_t* wout;
31 #endif
32
33 // clang-format off
34
f()35 void f() {
36 std::format_to_n(out, 42, "{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
37 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
38
39 std::format_to_n(out, 42, "}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
40 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
41
42 std::format_to_n(out, 42, "{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
43 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
44
45 std::format_to_n(out, 42, "{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
46 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
47
48 std::format_to_n(out, 42, "{:-}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
49 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
50
51 std::format_to_n(out, 42, "{:#}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
52 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
53
54 std::format_to_n(out, 42, "{:L}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
55 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
56
57 std::format_to_n(out, 42, "{0:{0}}", "Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
58 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
59
60 std::format_to_n(out, 42, "{:.42d}", "Forty-two"); // 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_to_n(out, 42, "{:d}", "Forty-two"); // 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 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
67 std::format_to_n(wout, 42, L"{"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
68 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
69
70 std::format_to_n(wout, 42, L"}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
71 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
72
73 std::format_to_n(wout, 42, L"{}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
74 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
75
76 std::format_to_n(wout, 42, L"{0}"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
77 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
78
79 std::format_to_n(wout, 42, L"{:-}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
80 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
81
82 std::format_to_n(wout, 42, L"{:#}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
83 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
84
85 std::format_to_n(wout, 42, L"{:L}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
86 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
87
88 std::format_to_n(wout, 42, L"{0:{0}}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
89 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
90
91 std::format_to_n(wout, 42, L"{:.42d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
92 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
93
94 std::format_to_n(wout, 42, L"{:d}", L"Forty-two"); // expected-error-re{{call to consteval function '{{.*}}' is not a constant expression}}
95 // expected-note@*:* {{non-constexpr function '__throw_format_error' cannot be used in a constant expression}}
96 #endif
97 }
98