clang/test/CXX/expr/expr.prim/expr.prim.lambda/p3.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify
   2 // RUN: %clang_cc1 -fsyntax-only -std=c++14 %s -verify
   3 // RUN: %clang_cc1 -fsyntax-only -std=c++17 %s -verify
   4
   5 void test_nonaggregate(int i) {
   6   auto lambda = [i]() -> void {}; // expected-note 2{{candidate constructor}}
   7   decltype(lambda) foo = { 1 }; // expected-error{{no matching constructor}}
   8   static_assert(__is_literal(decltype(lambda)) == (__cplusplus >= 201703L), "");
   9
  10   auto lambda2 = []{}; // expected-note 2{{candidate constructor}}
  11   decltype(lambda2) bar = {}; // expected-error{{no matching constructor}}
  12   static_assert(__is_literal(decltype(lambda2)) == (__cplusplus >= 201703L), "");
  13 }
  14
  15 constexpr auto literal = []{};
  16 #if __cplusplus < 201703L
  17 // expected-error@-2 {{constexpr variable cannot have non-literal type}}
  18 // expected-note@-3 {{lambda closure types are non-literal types before C++17}}
  19 #endif