38 lines
1.0 KiB
C++
38 lines
1.0 KiB
C++
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// No PCH:
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// RUN: %clang_cc1 -pedantic -std=c++1z -include %s -verify %s
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//
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// With PCH:
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// RUN: %clang_cc1 -pedantic -std=c++1z -emit-pch -fallow-pch-with-compiler-errors %s -o %t
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// RUN: %clang_cc1 -pedantic -std=c++1z -include-pch %t -fallow-pch-with-compiler-errors -verify %s
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// RUN: %clang_cc1 -pedantic -std=c++1z -emit-pch -fallow-pch-with-compiler-errors -fpch-instantiate-templates %s -o %t
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// RUN: %clang_cc1 -pedantic -std=c++1z -include-pch %t -fallow-pch-with-compiler-errors -verify %s
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#ifndef HEADER
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#define HEADER
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template<typename T> auto decomp(const T &t) {
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auto &[a, b] = t;
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return a + b;
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}
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struct Q { int a, b; };
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constexpr int foo(Q &&q) {
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auto &[a, b] = q;
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return a * 10 + b;
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}
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auto [noinit]; // expected-error{{decomposition declaration '[noinit]' requires an initializer}}
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#else
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int arr[2];
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int k = decomp(arr);
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static_assert(foo({1, 2}) == 12);
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// expected-error@15 {{cannot decompose non-class, non-array type 'const int'}}
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int z = decomp(10); // expected-note {{instantiation of}}
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#endif
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