зеркало из https://github.com/microsoft/clang.git
110 строки
2.9 KiB
C++
110 строки
2.9 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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// PR5290
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int const f0();
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void f0_test() {
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decltype(0, f0()) i = 0;
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i = 0;
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}
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struct A { int a[1]; A() { } };
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typedef A const AC;
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int &f1(int*);
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float &f2(int const*);
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void test_f2() {
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float &fr = f2(AC().a);
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}
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template <class T>
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struct Future {
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explicit Future(T v);
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template <class F>
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auto call(F&& fn) -> decltype(fn(T())) {
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return fn(T());
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}
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template <class B, class F>
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auto then(F&& fn) -> decltype(call(fn))
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{
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return fn(T());
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}
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};
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void rdar16527205() {
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Future<int> f1(42);
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f1.call([](int){ return Future<float>(0); });
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}
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namespace pr10154 {
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class A{
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A(decltype(nullptr) param);
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};
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}
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template<typename T> struct S {};
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template<typename T> auto f(T t) -> decltype(S<int>(t)) {
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using U = decltype(S<int>(t));
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using U = S<int>;
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return S<int>(t);
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}
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struct B {
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B(decltype(undeclared)); // expected-error {{undeclared identifier}}
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};
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struct C {
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C(decltype(undeclared; // expected-error {{undeclared identifier}} \
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// expected-error {{expected ')'}} expected-note {{to match this '('}}
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};
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namespace PR16529 {
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struct U {};
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template <typename T> struct S {
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static decltype(T{}, U{}) &f();
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};
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U &r = S<int>::f();
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}
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namespace PR18876 {
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struct A { ~A() = delete; }; // expected-note +{{here}}
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A f();
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decltype(f()) *a; // ok, function call
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decltype(A()) *b; // expected-error {{attempt to use a deleted function}}
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decltype(0, f()) *c; // ok, function call on RHS of comma
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decltype(0, A()) *d; // expected-error {{attempt to use a deleted function}}
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decltype(f(), 0) *e; // expected-error {{attempt to use a deleted function}}
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}
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namespace D5789 {
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struct P1 { char x[6]; } g1 = { "foo" };
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struct LP1 { struct P1 p1; };
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// expected-warning@+3 {{subobject initialization overrides}}
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// expected-note@+2 {{previous initialization}}
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// expected-note@+1 {{previous definition}}
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template<class T> void foo(decltype(T(LP1{ .p1 = g1, .p1.x[1] = 'x' }))) {}
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// expected-warning@+3 {{subobject initialization overrides}}
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// expected-note@+2 {{previous initialization}}
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template<class T>
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void foo(decltype(T(LP1{ .p1 = g1, .p1.x[1] = 'r' }))) {} // okay
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// expected-warning@+3 {{subobject initialization overrides}}
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// expected-note@+2 {{previous initialization}}
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template<class T>
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void foo(decltype(T(LP1{ .p1 = { "foo" }, .p1.x[1] = 'x'}))) {} // okay
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// expected-warning@+3 {{subobject initialization overrides}}
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// expected-note@+2 {{previous initialization}}
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// expected-error@+1 {{redefinition of 'foo'}}
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template<class T> void foo(decltype(T(LP1{ .p1 = g1, .p1.x[1] = 'x' }))) {}
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}
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template<typename>
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class conditional {
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};
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void foo(conditional<decltype((1),int>) { // expected-note 2 {{to match this '('}} expected-error {{expected ')'}}
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} // expected-error {{expected function body after function declarator}} expected-error 2 {{expected '>'}} expected-error {{expected ')'}}
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