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

   1 // RUN: %clang_cc1 -std=c++20 -Wno-unused-value -fsyntax-only -verify %s
   2
   3 namespace GH49266 {
   4 struct X {
   5   X() = default;
   6   X(X const&) = delete; // expected-note {{'X' has been explicitly marked deleted here}}
   7 };
   8
   9 void take_by_copy(auto &...args) {
  10   [...args = args] {}(); // expected-error {{call to deleted constructor}}
  11                          // expected-note@-1 {{substituting into a lambda}}
  12 }
  13
  14 void take_by_ref(auto &...args) {
  15   [&...args = args] {}(); // args is passed by reference and not copied.
  16 }
  17
  18 void foo() {
  19   X x;
  20   take_by_copy(x); // expected-note {{in instantiation of function template specialization}}
  21   take_by_ref(x);
  22 }
  23 }