derek.holloway
7502bf64a4
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78 lines
4.5 KiB
C++
78 lines
4.5 KiB
C++
// RUN: %clang_cc1 -std=c++98 %s -fexceptions -fcxx-exceptions -pedantic-errors -verify=expected,cxx98
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// RUN: %clang_cc1 -std=c++11 %s -fexceptions -fcxx-exceptions -pedantic-errors -verify=expected,since-cxx11,cxx11
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// RUN: %clang_cc1 -std=c++14 %s -fexceptions -fcxx-exceptions -pedantic-errors -verify=expected,since-cxx11,since-cxx14
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// RUN: %clang_cc1 -std=c++17 %s -fexceptions -fcxx-exceptions -pedantic-errors -verify=expected,since-cxx11,since-cxx14
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// RUN: %clang_cc1 -std=c++20 %s -fexceptions -fcxx-exceptions -pedantic-errors -verify=expected,since-cxx11,since-cxx14,since-cxx20
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// RUN: %clang_cc1 -std=c++23 %s -fexceptions -fcxx-exceptions -pedantic-errors -verify=expected,since-cxx11,since-cxx14,since-cxx20
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// RUN: %clang_cc1 -std=c++2c %s -fexceptions -fcxx-exceptions -pedantic-errors -verify=expected,since-cxx11,since-cxx14,since-cxx20
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namespace cwg2026 { // cwg2026: 11
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template<int> struct X {};
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const int a = a + 1; // #cwg2026-a
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// expected-warning@-1 {{variable 'a' is uninitialized when used within its own initialization}}
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X<a> xa; // #cwg2026-xa
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// cxx98-error@-1 {{non-type template argument of type 'int' is not an integral constant expression}}
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// cxx98-note@-2 {{initializer of 'a' is not a constant expression}}
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// cxx98-note@#cwg2026-a {{declared here}}
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// since-cxx11-error@#cwg2026-xa {{non-type template argument is not a constant expression}}
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// since-cxx11-note@#cwg2026-xa {{initializer of 'a' is not a constant expression}}
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// since-cxx11-note@#cwg2026-a {{declared here}}
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#if __cplusplus >= 201103L
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constexpr int b = b;
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// since-cxx11-error@-1 {{constexpr variable 'b' must be initialized by a constant expression}}
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// since-cxx11-note@-2 {{read of object outside its lifetime is not allowed in a constant expression}}
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// since-cxx11-note@-3 {{declared here}}
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[[clang::require_constant_initialization]] int c = c;
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// since-cxx11-error@-1 {{variable does not have a constant initializer}}
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// since-cxx11-note@-2 {{required by 'require_constant_initialization' attribute here}}
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// cxx11-note@-3 {{read of non-const variable 'c' is not allowed in a constant expression}}
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// cxx11-note@-4 {{declared here}}
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// since-cxx14-note@-5 {{read of object outside its lifetime is not allowed in a constant expression}}
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// since-cxx14-note@-6 {{declared here}}
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#endif
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#if __cplusplus >= 202002L
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constinit int d = d;
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// since-cxx20-error@-1 {{variable does not have a constant initializer}}
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// since-cxx20-note@-2 {{required by 'constinit' specifier here}}
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// since-cxx20-note@-3 {{read of object outside its lifetime is not allowed in a constant expression}}
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// since-cxx20-note@-4 {{declared here}}
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#endif
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void f() {
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static const int e = e + 1; // #cwg2026-e
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// expected-warning@-1 {{static variable 'e' is suspiciously used within its own initialization}}
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X<e> xe; // #cwg2026-xe
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// cxx98-error@-1 {{non-type template argument of type 'int' is not an integral constant expression}}
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// cxx98-note@-2 {{initializer of 'e' is not a constant expression}}
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// cxx98-note@#cwg2026-e {{declared here}}
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// since-cxx11-error@#cwg2026-xe {{non-type template argument is not a constant expression}}
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// since-cxx11-note@#cwg2026-xe {{initializer of 'e' is not a constant expression}}
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// since-cxx11-note@#cwg2026-e {{declared here}}
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#if __cplusplus >= 201103L
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static constexpr int f = f;
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// since-cxx11-error@-1 {{constexpr variable 'f' must be initialized by a constant expression}}
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// since-cxx11-note@-2 {{read of object outside its lifetime is not allowed in a constant expression}}
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// since-cxx11-note@-3 {{declared here}}
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[[clang::require_constant_initialization]] static int g = g;
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// since-cxx11-error@-1 {{variable does not have a constant initializer}}
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// since-cxx11-note@-2 {{required by 'require_constant_initialization' attribute here}}
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// cxx11-note@-3 {{read of non-const variable 'g' is not allowed in a constant expression}}
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// cxx11-note@-4 {{declared here}}
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// since-cxx14-note@-5 {{read of object outside its lifetime is not allowed in a constant expression}}
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// since-cxx14-note@-6 {{declared here}}
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#endif
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#if __cplusplus >= 202002L
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static constinit int h = h;
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// since-cxx20-error@-1 {{variable does not have a constant initializer}}
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// since-cxx20-note@-2 {{required by 'constinit' specifier here}}
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// since-cxx20-note@-3 {{read of object outside its lifetime is not allowed in a constant expression}}
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// since-cxx20-note@-4 {{declared here}}
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#endif
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}
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} // namespace cwg2026
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