| 1 | /* Tests for interactions between C++ and assert. |
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| 2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* Undefine NDEBUG to ensure the build system e.g. CFLAGS/CXXFLAGS |
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| 20 | does not disable the asserts we want to test. */ |
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| 21 | #undef NDEBUG |
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| 22 | #include <assert.h> |
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| 23 | |
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| 24 | /* The C++ standard requires that if the assert argument is a constant |
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| 25 | subexpression, then the assert itself is one, too. */ |
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| 26 | constexpr int |
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| 27 | check_constexpr () |
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| 28 | { |
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| 29 | return (assert (true), 1); |
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| 30 | } |
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| 31 | |
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| 32 | /* Objects of this class can be contextually converted to bool, but |
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| 33 | cannot be compared to int. */ |
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| 34 | struct no_int |
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| 35 | { |
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| 36 | no_int () = default; |
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| 37 | no_int (const no_int &) = delete; |
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| 38 | |
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| 39 | explicit operator bool () const |
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| 40 | { |
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| 41 | return true; |
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| 42 | } |
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| 43 | |
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| 44 | bool operator! () const; /* No definition. */ |
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| 45 | template <class T> bool operator== (T) const; /* No definition. */ |
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| 46 | template <class T> bool operator!= (T) const; /* No definition. */ |
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| 47 | }; |
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| 48 | |
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| 49 | /* This class tests that operator== is not used by assert. */ |
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| 50 | struct bool_and_int |
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| 51 | { |
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| 52 | bool_and_int () = default; |
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| 53 | bool_and_int (const no_int &) = delete; |
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| 54 | |
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| 55 | explicit operator bool () const |
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| 56 | { |
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| 57 | return true; |
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| 58 | } |
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| 59 | |
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| 60 | bool operator! () const; /* No definition. */ |
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| 61 | template <class T> bool operator== (T) const; /* No definition. */ |
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| 62 | template <class T> bool operator!= (T) const; /* No definition. */ |
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| 63 | }; |
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| 64 | |
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| 65 | static int |
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| 66 | do_test () |
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| 67 | { |
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| 68 | { |
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| 69 | no_int value; |
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| 70 | assert (value); |
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| 71 | } |
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| 72 | |
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| 73 | { |
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| 74 | bool_and_int value; |
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| 75 | assert (value); |
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| 76 | } |
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| 77 | |
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| 78 | return 0; |
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| 79 | } |
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| 80 | |
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| 81 | #include <support/test-driver.c> |
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| 82 | |
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