clang/test/SemaCXX/lambda-pack-expansion.cpp


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// RUN: %clang_cc1 -std=c++20 -Wno-unused-value -fsyntax-only -verify %s

namespace GH49266 {
struct X {
  X() = default;
  X(X const&) = delete; // expected-note {{'X' has been explicitly marked deleted here}}
};

void take_by_copy(auto &...args) {
  [...args = args] {}(); // expected-error {{call to deleted constructor}}
                         // expected-note@-1 {{substituting into a lambda}}
}

void take_by_ref(auto &...args) {
  [&...args = args] {}(); // args is passed by reference and not copied.
}

void foo() {
  X x;
  take_by_copy(x); // expected-note {{in instantiation of function template specialization}}
  take_by_ref(x);
}
}