clang/test/Parser/cxx2c-delete-with-message.cpp

   1 // RUN: %clang_cc1 -std=c++17 -fsyntax-only -verify=expected,pre26 %s
   2 // RUN: %clang_cc1 -std=c++17 -fsyntax-only -verify=expected,pre26-pedantic -pedantic %s
   3 // RUN: %clang_cc1 -std=c++2c -fsyntax-only -verify=expected,compat -Wpre-c++26-compat %s
   4 // RUN: %clang_cc1 -std=c++2c -fsyntax-only -verify %s
   5
   6 struct S {
   7   void a() = delete;
   8   void b() = delete(; // expected-error {{expected string literal}} expected-error {{expected ')'}} expected-note {{to match this '('}}
   9   void c() = delete(); // expected-error {{expected string literal}}
  10   void d() = delete(42); // expected-error {{expected string literal}}
  11   void e() = delete("foo"[0]); // expected-error {{expected ')'}} expected-note {{to match this '('}} // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  12   void f() = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  13
  14   S() = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  15   ~S() = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  16   S(const S&) = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  17   S(S&&) = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  18   S& operator=(const S&) = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  19   S& operator=(S&&) = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  20 };
  21
  22 struct T {
  23   T() = delete(); // expected-error {{expected string literal}}
  24   ~T() = delete(); // expected-error {{expected string literal}}
  25   T(const T&) = delete(); // expected-error {{expected string literal}}
  26   T(T&&) = delete(); // expected-error {{expected string literal}}
  27   T& operator=(const T&) = delete(); // expected-error {{expected string literal}}
  28   T& operator=(T&&) = delete(); // expected-error {{expected string literal}}
  29 };
  30
  31 void a() = delete;
  32 void b() = delete(; // expected-error {{expected string literal}} expected-error {{expected ')'}} expected-note {{to match this '('}}
  33 void c() = delete(); // expected-error {{expected string literal}}
  34 void d() = delete(42); // expected-error {{expected string literal}}
  35 void e() = delete("foo"[0]); // expected-error {{expected ')'}} expected-note {{to match this '('}} // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  36 void f() = delete("foo"); // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2c}}
  37
  38 constexpr const char *getMsg() { return "this is a message"; }
  39 void func() = delete(getMsg()); // expected-error {{expected string literal}}
  40
  41 namespace CWG2876 {
  42 using T = void ();
  43 using U = int;
  44
  45 T a = delete ("hello"); // expected-error {{only functions can have deleted definitions}}
  46 U b = delete ("hello"), c, d = delete ("hello"); // expected-error 2 {{only functions can have deleted definitions}}
  47
  48 struct C {
  49   T e = delete ("hello"); // expected-error {{'= delete' is a function definition and must occur in a standalone declaration}}
  50   U f = delete ("hello"); // expected-error {{cannot delete expression of type 'const char[6]'}}
  51 };
  52 }
  53
  54 namespace GH109311 {
  55 void f() = delete
  56 #if __cpp_deleted_function >= 202403L
  57     ("reason") // pre26-pedantic-warning {{'= delete' with a message is a C++2c extension}} \
  58                // compat-warning {{'= delete' with a message is incompatible with C++ standards before C++2}}
  59 #endif
  60 ;
  61 }