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1 // Tests that the compiler won't crash due to the consteval constructor.
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2 //
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3 // REQUIRES: x86-registered-target
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4 //
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5 // RUN: rm -rf %t
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6 // RUN: mkdir -p %t
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7 // RUN: split-file %s %t
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8 //
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9 // RUN: %clang_cc1 -triple=x86_64-linux-gnu -std=c++20 -emit-module-interface %t/m.cppm -o %t/m.pcm
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10 // RUN: %clang_cc1 -triple=x86_64-linux-gnu -std=c++20 %t/m.pcm -S -emit-llvm -o - | FileCheck %t/m.cppm
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11 //
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12 //--- m.cppm
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13 module;
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14 #include "fail.h"
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15 export module mymodule;
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16
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17 // CHECK: @.str = {{.*}}"{}\00"
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18 // CHECK: store{{.*}}ptr @.str
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19
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20 //--- fail.h
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21 namespace std {
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22
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23 template<class _CharT>
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24 class basic_string_view {
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25 public:
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26 constexpr basic_string_view(const _CharT* __s)
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27 : __data_(__s) {}
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28
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29 private:
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30 const _CharT* __data_;
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31 };
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32
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33 template <class _CharT>
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34 struct basic_format_string {
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35 template <class _Tp>
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36 consteval basic_format_string(const _Tp& __str) : __str_{__str} {
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37 }
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38
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39 private:
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40 basic_string_view<_CharT> __str_;
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41 };
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42 }
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43
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44 auto this_fails() -> void {
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45 std::basic_format_string<char> __fmt("{}");
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46 }
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