forked from OSchip/llvm-project
183 lines
3.8 KiB
C++
183 lines
3.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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struct X0 { // expected-note {{candidate constructor (the implicit copy constructor) not viable}}
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#if __cplusplus >= 201103L // C++11 or later
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// expected-note@-2 {{candidate constructor (the implicit move constructor) not viable}}
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#endif
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X0(int); // expected-note{{candidate}}
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template<typename T> X0(T); // expected-note {{candidate}}
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template<typename T, typename U> X0(T*, U*); // expected-note {{candidate}}
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// PR4761
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template<typename T> X0() : f0(T::foo) {} // expected-note {{candidate}}
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int f0;
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};
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void accept_X0(X0);
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void test_X0(int i, float f) {
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X0 x0a(i);
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X0 x0b(f);
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X0 x0c = i;
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X0 x0d = f;
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accept_X0(i);
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accept_X0(&i);
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accept_X0(f);
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accept_X0(&f);
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X0 x0e(&i, &f);
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X0 x0f(&f, &i);
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X0 x0g(f, &i); // expected-error{{no matching constructor}}
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}
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template<typename T>
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struct X1 {
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X1(const X1&);
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template<typename U> X1(const X1<U>&);
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};
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template<typename T>
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struct Outer {
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typedef X1<T> A;
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A alloc;
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explicit Outer(const A& a) : alloc(a) { }
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};
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void test_X1(X1<int> xi) {
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Outer<int> oi(xi);
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Outer<float> of(xi);
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}
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// PR4655
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template<class C> struct A {};
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template <> struct A<int>{A(const A<int>&);};
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struct B { A<int> x; B(B& a) : x(a.x) {} };
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struct X2 {
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X2(); // expected-note{{candidate constructor}}
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X2(X2&); // expected-note {{candidate constructor}}
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template<typename T> X2(T); // expected-note {{candidate template ignored: instantiation would take its own class type by value}}
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};
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X2 test(bool Cond, X2 x2) {
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if (Cond)
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return x2; // okay, uses copy constructor
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return X2(); // expected-error{{no matching constructor}}
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}
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struct X3 {
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template<typename T> X3(T);
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};
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template<> X3::X3(X3); // expected-error{{must pass its first argument by reference}}
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struct X4 {
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X4();
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~X4();
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X4(X4&);
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template<typename T> X4(const T&, int = 17);
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};
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X4 test_X4(bool Cond, X4 x4) {
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X4 a(x4, 17); // okay, constructor template
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X4 b(x4); // okay, copy constructor
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return X4();
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}
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// Instantiation of a non-dependent use of a constructor
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struct DefaultCtorHasDefaultArg {
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explicit DefaultCtorHasDefaultArg(int i = 17);
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};
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template<typename T>
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void default_ctor_inst() {
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DefaultCtorHasDefaultArg def;
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}
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template void default_ctor_inst<int>();
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template<typename T>
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struct X5 {
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X5();
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X5(const T &);
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};
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struct X6 {
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template<typename T> X6(T);
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};
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void test_X5_X6() {
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X5<X6> tf;
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X5<X6> tf2(tf);
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}
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namespace PR8182 {
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struct foo {
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foo();
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template<class T> foo(T&);
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private:
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foo(const foo&);
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};
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void test_foo() {
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foo f1;
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foo f2(f1);
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foo f3 = f1;
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}
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}
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// Don't blow out the stack trying to call an illegal constructor
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// instantiation. We intentionally allow implicit instantiations to
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// exist, so make sure they're unusable.
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//
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// rdar://19199836
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namespace self_by_value {
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template <class T, class U> struct A {
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A() {}
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A(const A<T,U> &o) {}
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A(A<T,T> o) {}
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};
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void helper(A<int,float>);
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void test1(A<int,int> a) {
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helper(a);
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}
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void test2() {
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helper(A<int,int>());
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}
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}
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namespace self_by_value_2 {
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template <class T, class U> struct A {
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A() {} // expected-note {{not viable: requires 0 arguments}}
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A(A<T,U> &o) {} // expected-note {{not viable: expects an lvalue}}
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A(A<T,T> o) {} // expected-note {{ignored: instantiation takes its own class type by value}}
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};
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void helper_A(A<int,int>); // expected-note {{passing argument to parameter here}}
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void test_A() {
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helper_A(A<int,int>()); // expected-error {{no matching constructor}}
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}
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}
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namespace self_by_value_3 {
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template <class T, class U> struct A {
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A() {}
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A(A<T,U> &o) {}
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A(A<T,T> o) {}
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};
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void helper_A(A<int,int>);
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void test_A(A<int,int> b) {
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helper_A(b);
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}
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}
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