llvm-for-llvmta/tools/clang/test/CXX/dcl.decl/dcl.decomp/p2.cpp

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2022-04-25 13:02:35 +02:00
// RUN: %clang_cc1 -std=c++1z -verify %s -Wpedantic
struct X {
X(int);
X(const X&) = delete;
};
int array() {
static int arr[3] = {};
auto [a, b, c] = arr;
static_assert(&a != &arr[0]);
using I3 = int[3];
auto [a2, b2, c2] = I3{1, 2, 3};
using X3 = X[3];
auto [a3, b3, c3] = X3{1, 2, 3};
auto &[d, e] = arr; // expected-error {{type 'int [3]' decomposes into 3 elements, but only 2 names were provided}}
auto &[f, g, h, i] = arr; // expected-error {{type 'int [3]' decomposes into 3 elements, but 4 names were provided}}
auto &[r0, r1, r2] = arr;
const auto &[cr0, cr1, cr2] = arr;
static_assert(&arr[0] == &r0);
static_assert(&arr[0] == &cr0);
using T = int;
using T = decltype(r0);
using U = const int;
using U = decltype(cr0);
return r1 + cr2;
}