derek.holloway
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52 lines
2.1 KiB
C++
52 lines
2.1 KiB
C++
// RUN: %clang_cc1 -std=c++20 -verify=test1 -DTEST1 %s
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// RUN: %clang_cc1 -std=c++20 -verify=test2 -DTEST2 %s
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// RUN: %clang_cc1 -std=c++20 -verify=test3 -DTEST3 %s
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// RUN: %clang_cc1 -std=c++20 -verify=test4 -DTEST4 %s
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// RUN: %clang_cc1 -std=c++20 -verify=test5 -DTEST5 %s
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namespace std {
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#ifdef TEST1
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// Case 1: Malformed struct (static members are wrong type)
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// This triggered the original crash (GH170015).
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struct partial_ordering {
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static constexpr int equivalent = 0;
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static constexpr int less = -1;
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static constexpr int greater = 1;
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static constexpr int unordered = 2;
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};
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#elif defined(TEST2)
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// Case 2: partial_ordering is a typedef to int
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using partial_ordering = int;
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#elif defined(TEST3)
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// Case 3: partial_ordering is a forward declaration
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struct partial_ordering; // test3-note {{forward declaration of 'std::partial_ordering'}}
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#elif defined(TEST4)
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// Case 4: partial_ordering is a template (Paranoia check)
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template <class> struct partial_ordering {
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static const partial_ordering less;
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static const partial_ordering equivalent;
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static const partial_ordering greater;
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static const partial_ordering unordered;
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};
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#elif defined(TEST5)
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// Case 5: strong_ordering is a typedef to int (covers GH56571)
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using strong_ordering = int;
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#endif
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}
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void f() {
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#ifdef TEST5
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int a = 0, b = 0; // int <=> int requires std::strong_ordering
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#else
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float a = 0.0f, b = 0.0f; // float <=> float requires std::partial_ordering
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#endif
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auto res = a <=> b;
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// test1-error@-2 {{standard library implementation of 'std::partial_ordering' is not supported; the type does not have the expected form}}
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// test2-error@-3 {{cannot use builtin operator '<=>' because type 'std::partial_ordering' was not found; include <compare>}}
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// test3-error@-4 {{incomplete type 'std::partial_ordering' where a complete type is required}}
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// test4-error@-5 {{cannot use builtin operator '<=>' because type 'std::partial_ordering' was not found; include <compare>}}
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// test5-error@-6 {{cannot use builtin operator '<=>' because type 'std::strong_ordering' was not found; include <compare>}}
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}
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