16   constexpr Literal() {}  in Literal()
30   constexpr T();
31   constexpr int f(); // expected-error {{non-literal type 'T' cannot have constexpr members}}
34 …virtual constexpr int ExplicitlyVirtual() { return 0; } // expected-error {{virtual function canno…  in ExplicitlyVirtual()
36 …constexpr int ImplicitlyVirtual() { return 0; } // expected-error {{virtual function cannot be con…  in ImplicitlyVirtual()
39 …constexpr NonLiteral NonLiteralReturn() { return {}; } // expected-error {{constexpr function's re…  in NonLiteralReturn()
40 …constexpr void VoidReturn() { return; } // expected-error {{constexpr function's return type 'void…  in VoidReturn()
41   constexpr ~T(); // expected-error {{destructor cannot be marked constexpr}}
43   constexpr F NonLiteralReturn2; // ok until definition
46 …constexpr int NonLiteralParam(NonLiteral) { return 0; } // expected-error {{constexpr function's 1…  in NonLiteralParam()
48   constexpr G NonLiteralParam2; // ok until definition
51   constexpr int Deleted() = delete;
57 …constexpr T &operator=(const T&) = default; // expected-error {{an explicitly-defaulted copy assig…
60   constexpr U SelfReturn();
61   constexpr int SelfParam(U);
65 …constexpr int F() { return 0; } // expected-error {{constexpr member function not allowed in struc…  in F()
69 constexpr int AllowedStmts() {  in AllowedStmts()
94 constexpr int ForStmt() {  in ForStmt()
98 constexpr int VarDecl() {  in VarDecl()
99   constexpr int a = 0; // expected-error {{variables cannot be declared in a constexpr function}}  in VarDecl()
102 constexpr int FuncDecl() {  in FuncDecl()
103   constexpr int ForwardDecl(int); // expected-error {{statement not allowed in constexpr function}}  in FuncDecl()
106 constexpr int ClassDecl1() {  in ClassDecl1()
110 constexpr int ClassDecl2() {  in ClassDecl2()
114 constexpr int ClassDecl3() {  in ClassDecl3()
118 constexpr int NoReturn() {} // expected-error {{no return statement in constexpr function}}  in NoReturn()
119 constexpr int MultiReturn() {  in MultiReturn()
131   constexpr int f(int k) {  in f()
136   constexpr int f() { // expected-error {{constexpr function never produces a constant expression}}  in f()