30 lines · cpp
1// RUN: %clang_cc1 %s -fsyntax-only -verify -std=c++202 3void foo() {4 void fn(int i, int = ({ 1; })); // expected-error {{default argument may not use a GNU statement expression}}5 6 auto a = [](int = ({ 1; })) {}; // expected-error {{default argument may not use a GNU statement expression}}7 8 auto b = []<int = ({ 1; })>(){}; // expected-error {{default non-type template argument may not use a GNU statement expression}}9 10 void fn(int i, int j = ({{}, {}, {,}}), int k = ""); // expected-error {{default argument may not use a GNU statement expression}} expected-error {{cannot initialize a parameter of type 'int' with an lvalue of type 'const char[1]'}} expected-note {{passing argument to parameter 'k' here}}11}12 13template <int foo = ({ 1; })> // expected-error {{default non-type template argument may not use a GNU statement expression}}14void f() {}15 16template <int bar = ({ 1; })> // expected-error {{default non-type template argument may not use a GNU statement expression}}17class S {};18 19template <typename Callable>20int bar(Callable &&Call) {21 return Call();22}23 24int baz() {25 auto l = [](int a = ({ int x = 12; x; })) { // expected-error {{default argument may not use a GNU statement expression}}26 return 1;27 };28 return bar(l);29}30