73 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -verify %s2 3namespace PR5909 {4 struct Foo {5 int x : 20;6 };7 8 bool Test(const int& foo);9 10 const Foo f = { 0 }; // It compiles without the 'const'.11 bool z = Test(f.x);12}13 14namespace PR6264 {15 typedef int (&T)[3];16 struct S17 {18 operator T ();19 };20 void f()21 {22 T bar = S();23 }24}25 26namespace PR6066 {27 struct B { };28 struct A : B {29 operator B*();30 operator B&(); // expected-warning{{conversion function converting 'PR6066::A' to its base class 'PR6066::B' will never be used}}31 };32 33 void f(B&); // no rvalues accepted34 void f(B*);35 36 int g() {37 f(A()); // calls f(B*)38 return 0;39 }40}41 42namespace test3 {43 struct A {44 unsigned bitX : 4; // expected-note 3 {{bit-field is declared here}}45 unsigned bitY : 4; // expected-note {{bit-field is declared here}}46 unsigned var;47 48 void foo();49 };50 51 void test(A *a) {52 unsigned &t0 = a->bitX; // expected-error {{non-const reference cannot bind to bit-field 'bitX'}}53 unsigned &t1 = (unsigned&) a->bitX; // expected-error {{C-style cast from bit-field lvalue to reference type 'unsigned int &'}}54 unsigned &t2 = const_cast<unsigned&>(a->bitX); // expected-error {{const_cast from bit-field lvalue to reference type 'unsigned int &'}}55 unsigned &t3 = (a->foo(), a->bitX); // expected-error {{non-const reference cannot bind to bit-field 'bitX'}}56 unsigned &t4 = (a->var ? a->bitX : a->bitY); // expected-error {{non-const reference cannot bind to bit-field}}57 unsigned &t5 = (a->var ? a->bitX : a->bitX); // expected-error {{non-const reference cannot bind to bit-field}}58 unsigned &t6 = (a->var ? a->bitX : a->var); // expected-error {{non-const reference cannot bind to bit-field}}59 unsigned &t7 = (a->var ? a->var : a->bitY); // expected-error {{non-const reference cannot bind to bit-field}}60 unsigned &t8 = (a->bitX = 3); // expected-error {{non-const reference cannot bind to bit-field 'bitX'}}61 unsigned &t9 = (a->bitY += 3); // expected-error {{non-const reference cannot bind to bit-field 'bitY'}}62 }63}64 65namespace explicit_ctor {66 struct A {};67 struct B { // expected-note 2{{candidate}}68 explicit B(const A&); // expected-note {{explicit constructor is not a candidate}}69 };70 A a;71 const B &b(a); // expected-error {{no viable conversion}}72}73