1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 // This is a "No Compile Test" suite.
6 // http://dev.chromium.org/developers/testing/no-compile-tests
10 #include "base/bind.h"
11 #include "base/callback.h"
12 #include "base/macros.h"
13 #include "base/memory/ref_counted.h"
14 #include "base/test/bind_test_util.h"
18 // Do not put everything inside an anonymous namespace. If you do, many of the
19 // helper function declarations will generate unused definition warnings.
21 static const int kParentValue = 1;
22 static const int kChildValue = 2;
27 void VoidConstMethod0() const {}
28 int IntMethod0() { return 1; }
31 class HasRef : public NoRef, public base::RefCounted<HasRef> {
36 void AddRef() const {}
37 void Release() const {}
38 virtual void VirtualSet() { value = kParentValue; }
39 void NonVirtualSet() { value = kParentValue; }
43 class Child : public Parent {
45 virtual void VirtualSet() { value = kChildValue; }
46 void NonVirtualSet() { value = kChildValue; }
51 virtual void VirtualSet() { value = kParentValue; }
52 void NonVirtualSet() { value = kParentValue; }
56 class NoRefChild : public NoRefParent {
57 virtual void VirtualSet() { value = kChildValue; }
58 void NonVirtualSet() { value = kChildValue; }
62 T PolymorphicIdentity(T t) {
66 int UnwrapParentRef(Parent& p) {
71 void VoidPolymorphic1(T t) {
74 void TakesMoveOnly(std::unique_ptr<int>) {
77 struct NonEmptyFunctor {
79 void operator()() const {}
82 #if defined(NCTEST_METHOD_ON_CONST_OBJECT) // [r"fatal error: static_assert failed due to requirement 'param_is_forwardable' \"Bound argument |i| of type |Arg| cannot be forwarded as |Unwrapped| to the bound functor, which declares it as |Param|.\""]
83 // Method bound to const-object.
85 // Only const methods should be allowed to work with const objects.
88 const HasRef* const_has_ref_ptr_ = &has_ref;
89 RepeatingCallback<void()> method_to_const_cb =
90 BindRepeating(&HasRef::VoidMethod0, const_has_ref_ptr_);
91 method_to_const_cb.Run();
94 #elif defined(NCTEST_METHOD_BIND_NEEDS_REFCOUNTED_OBJECT) // [r"fatal error: static_assert failed due to requirement '!std::is_pointer<base::NoRef *>::value || IsRefCountedType<base::NoRef, void>::value' \"Receivers may not be raw pointers. If using a raw pointer here is safe and has no lifetime concerns, use base::Unretained() and document why it's safe.\""]
97 // Method bound to non-refcounted object.
99 // We require refcounts unless you have Unretained().
102 RepeatingCallback<void()> no_ref_cb =
103 BindRepeating(&NoRef::VoidMethod0, &no_ref);
107 #elif defined(NCTEST_CONST_METHOD_NEEDS_REFCOUNTED_OBJECT) // [r"fatal error: static_assert failed due to requirement '!std::is_pointer<base::NoRef *>::value || IsRefCountedType<base::NoRef, void>::value' \"Receivers may not be raw pointers. If using a raw pointer here is safe and has no lifetime concerns, use base::Unretained() and document why it's safe.\""]
109 // Const Method bound to non-refcounted object.
111 // We require refcounts unless you have Unretained().
114 RepeatingCallback<void()> no_ref_const_cb =
115 BindRepeating(&NoRef::VoidConstMethod0, &no_ref);
116 no_ref_const_cb.Run();
119 #elif defined(NCTEST_CONST_POINTER) // [r"fatal error: static_assert failed due to requirement 'param_is_forwardable' \"Bound argument |i| of type |Arg| cannot be forwarded as |Unwrapped| to the bound functor, which declares it as |Param|.\""]
121 // Const argument used with non-const pointer parameter of same type.
123 // This is just a const-correctness check.
125 const NoRef* const_no_ref_ptr;
126 RepeatingCallback<NoRef*()> pointer_same_cb =
127 BindRepeating(&PolymorphicIdentity<NoRef*>, const_no_ref_ptr);
128 pointer_same_cb.Run();
131 #elif defined(NCTEST_CONST_POINTER_SUBTYPE) // [r"fatal error: static_assert failed due to requirement 'param_is_forwardable' \"Bound argument |i| of type |Arg| cannot be forwarded as |Unwrapped| to the bound functor, which declares it as |Param|.\""]
133 // Const argument used with non-const pointer parameter of super type.
135 // This is just a const-correctness check.
137 const NoRefChild* const_child_ptr;
138 RepeatingCallback<NoRefParent*()> pointer_super_cb =
139 BindRepeating(&PolymorphicIdentity<NoRefParent*>, const_child_ptr);
140 pointer_super_cb.Run();
143 #elif defined(DISABLED_NCTEST_DISALLOW_NON_CONST_REF_PARAM) // [r"fatal error: no member named 'AddRef' in 'base::NoRef'"]
144 // TODO(dcheng): I think there's a type safety promotion issue here where we can
145 // pass a const ref to a non const-ref function, or vice versa accidentally. Or
146 // we make a copy accidentally. Check.
148 // Functions with reference parameters, unsupported.
150 // First, non-const reference parameters are disallowed by the Google
151 // style guide. Second, since we are doing argument forwarding it becomes
152 // very tricky to avoid copies, maintain const correctness, and not
153 // accidentally have the function be modifying a temporary, or a copy.
156 RepeatingCallback<int(Parent&)> ref_arg_cb = BindRepeating(&UnwrapParentRef);
160 #elif defined(NCTEST_DISALLOW_BIND_TO_NON_CONST_REF_PARAM) // [r"fatal error: static_assert failed due to requirement 'param_is_forwardable' \"Bound argument |i| of type |Arg| cannot be forwarded as |Unwrapped| to the bound functor, which declares it as |Param|.\""]
162 // Binding functions with reference parameters, unsupported.
164 // See comment in NCTEST_DISALLOW_NON_CONST_REF_PARAM
167 RepeatingCallback<int()> ref_cb = BindRepeating(&UnwrapParentRef, p);
171 #elif defined(NCTEST_NO_IMPLICIT_ARRAY_PTR_CONVERSION) // [r"fatal error: static_assert failed due to requirement '!std::is_array<base::HasRef \[10\]>::value' \"First bound argument to a method cannot be an array.\""]
173 // A method should not be bindable with an array of objects.
175 // This is likely not wanted behavior. We specifically check for it though
176 // because it is possible, depending on how you implement prebinding, to
177 // implicitly convert an array type to a pointer type.
180 RepeatingCallback<void()> method_bound_to_array_cb =
181 BindRepeating(&HasRef::VoidMethod0, p);
182 method_bound_to_array_cb.Run();
185 #elif defined(NCTEST_NO_RVALUE_RAW_PTR_FOR_REFCOUNTED_TYPES) // [r"fatal error: static_assert failed due to requirement '!HasRefCountedTypeAsRawPtr<base::HasRef \*>::value' \"A parameter is a refcounted type and needs scoped_refptr.\""]
187 // Refcounted types should not be bound as a raw pointer.
191 RepeatingCallback<void()> ref_count_as_raw_ptr_a =
192 BindRepeating(&VoidPolymorphic1<int*>, &a);
193 RepeatingCallback<void()> ref_count_as_raw_ptr =
194 BindRepeating(&VoidPolymorphic1<HasRef*>, &for_raw_ptr);
197 #elif defined(NCTEST_NO_LVALUE_RAW_PTR_FOR_REFCOUNTED_TYPES) // [r"fatal error: static_assert failed due to requirement '!HasRefCountedTypeAsRawPtr<base::HasRef \*>::value' \"A parameter is a refcounted type and needs scoped_refptr.\""]
199 // Refcounted types should not be bound as a raw pointer.
201 HasRef* for_raw_ptr = nullptr;
202 RepeatingCallback<void()> ref_count_as_raw_ptr =
203 BindRepeating(&VoidPolymorphic1<HasRef*>, for_raw_ptr);
206 #elif defined(NCTEST_NO_RVALUE_CONST_RAW_PTR_FOR_REFCOUNTED_TYPES) // [r"fatal error: static_assert failed due to requirement '!HasRefCountedTypeAsRawPtr<const base::HasRef \*>::value' \"A parameter is a refcounted type and needs scoped_refptr.\""]
208 // Refcounted types should not be bound as a raw pointer.
210 const HasRef for_raw_ptr;
211 RepeatingCallback<void()> ref_count_as_raw_ptr =
212 BindRepeating(&VoidPolymorphic1<const HasRef*>, &for_raw_ptr);
215 #elif defined(NCTEST_NO_LVALUE_CONST_RAW_PTR_FOR_REFCOUNTED_TYPES) // [r"fatal error: static_assert failed due to requirement '!HasRefCountedTypeAsRawPtr<const base::HasRef \*>::value' \"A parameter is a refcounted type and needs scoped_refptr.\""]
217 // Refcounted types should not be bound as a raw pointer.
219 const HasRef* for_raw_ptr = nullptr;
220 RepeatingCallback<void()> ref_count_as_raw_ptr =
221 BindRepeating(&VoidPolymorphic1<const HasRef*>, for_raw_ptr);
224 #elif defined(NCTEST_WEAKPTR_BIND_MUST_RETURN_VOID) // [r"fatal error: static_assert failed due to requirement 'std::is_void<int>::value' \"weak_ptrs can only bind to methods without return values\""]
226 // WeakPtrs cannot be bound to methods with return types.
229 WeakPtrFactory<NoRef> weak_factory(&no_ref);
230 RepeatingCallback<int()> weak_ptr_with_non_void_return_type =
231 BindRepeating(&NoRef::IntMethod0, weak_factory.GetWeakPtr());
232 weak_ptr_with_non_void_return_type.Run();
235 #elif defined(NCTEST_DISALLOW_ASSIGN_DIFFERENT_TYPES) // [r"fatal error: no viable conversion from 'RepeatingCallback<MakeUnboundRunType<void \(\*\)\(int\)>>' to 'RepeatingCallback<void \(\)>'"]
237 // Bind result cannot be assigned to Callbacks with a mismatching type.
239 RepeatingClosure callback_mismatches_bind_type =
240 BindRepeating(&VoidPolymorphic1<int>);
243 #elif defined(NCTEST_DISALLOW_CAPTURING_LAMBDA) // [r"fatal error: implicit instantiation of undefined template 'base::internal::FunctorTraits<\(lambda at (\.\./)+base/bind_unittest.nc:[0-9]+:[0-9]+\), void>'"]
247 BindOnce([i,&j]() {j = i;});
250 #elif defined(NCTEST_DISALLOW_ONCECALLBACK_RUN_ON_LVALUE) // [r"fatal error: static_assert failed due to requirement '!sizeof \(\*this\)' \"OnceCallback::Run\(\) may only be invoked on a non-const rvalue, i\.e\. std::move\(callback\).Run\(\).\""]
253 OnceClosure cb = BindOnce([] {});
257 #elif defined(NCTEST_DISALLOW_ONCECALLBACK_RUN_ON_CONST_LVALUE) // [r"fatal error: static_assert failed due to requirement '!sizeof \(\*this\)' \"OnceCallback::Run\(\) may only be invoked on a non-const rvalue, i\.e\. std::move\(callback\).Run\(\).\""]
260 const OnceClosure cb = BindOnce([] {});
264 #elif defined(NCTEST_DISALLOW_ONCECALLBACK_RUN_ON_CONST_RVALUE) // [r"fatal error: static_assert failed due to requirement '!sizeof \(\*this\)' \"OnceCallback::Run\(\) may only be invoked on a non-const rvalue, i\.e\. std::move\(callback\).Run\(\).\""]
267 const OnceClosure cb = BindOnce([] {});
271 #elif defined(NCTEST_DISALLOW_BIND_ONCECALLBACK) // [r"fatal error: static_assert failed due to requirement '!base::internal::IsOnceCallback<base::OnceCallback<void \(int\)> ?>\(\)' \"BindRepeating cannot bind OnceCallback. Use BindOnce with std::move\(\).\""]
274 BindRepeating(BindOnce([](int) {}), 42);
277 #elif defined(NCTEST_DISALLOW_BINDONCE_LVALUE_ONCECALLBACK) // [r"fatal error: static_assert failed due to requirement '!internal::IsOnceCallback<std::decay_t<OnceCallback<void (int)> &> >() || (std::is_rvalue_reference<OnceCallback<void (int)> &>() && !std::is_const<std::remove_reference_t<OnceCallback<void (int)> &> >())' \"BindOnce requires non-const rvalue for OnceCallback binding. I.e.: base::BindOnce(std::move(callback)).\""]
279 auto cb = BindOnce([](int) {});
283 #elif defined(NCTEST_DISALLOW_BINDONCE_RVALUE_CONST_ONCECALLBACK) // [r"fatal error: static_assert failed due to requirement '!internal::IsOnceCallback<std::decay_t<const OnceCallback<void (int)> > >() || (std::is_rvalue_reference<const OnceCallback<void (int)> &&>() && !std::is_const<std::remove_reference_t<const OnceCallback<void (int)> > >())' \"BindOnce requires non-const rvalue for OnceCallback binding. I.e.: base::BindOnce(std::move(callback)).\""]
286 const auto cb = BindOnce([](int) {});
287 BindOnce(std::move(cb), 42);
290 #elif defined(NCTEST_BINDONCE_MOVEONLY_TYPE_BY_VALUE) // [r"fatal error: static_assert failed due to requirement 'arg_is_storable || !std::is_constructible<std::__1::unique_ptr<int, std::__1::default_delete<int> >, std::__1::unique_ptr<int, std::__1::default_delete<int> > &&>::value' \"Bound argument |i| is move-only but will be bound by copy. Ensure |Arg| is mutable and bound using std::move\(\).\""]
293 std::unique_ptr<int> x;
294 BindOnce(&TakesMoveOnly, x);
297 #elif defined(NCTEST_BIND_MOVEONLY_TYPE_BY_VALUE) // [r"Bound argument \|i\| is move-only but will be forwarded by copy\. Ensure \|Arg\| is bound using base::Passed\(\), not std::move\(\)."]
300 std::unique_ptr<int> x;
301 BindRepeating(&TakesMoveOnly, x);
304 #elif defined(NCTEST_BIND_MOVEONLY_TYPE_WITH_STDMOVE) // [r"Bound argument \|i\| is move-only but will be forwarded by copy\. Ensure \|Arg\| is bound using base::Passed\(\), not std::move\(\)."]
307 std::unique_ptr<int> x;
308 BindRepeating(&TakesMoveOnly, std::move(x));
311 #elif defined(NCTEST_BIND_NON_EMPTY_FUNCTOR) // [r"fatal error: implicit instantiation of undefined template 'base::internal::FunctorTraits<base::NonEmptyFunctor, void>'"]
314 BindRepeating(NonEmptyFunctor());
317 #elif defined(NCTEST_DISALLOW_BINDLAMBDAFORTESTING_LVALUE_MUTABLE_LAMBDA) // [r"BindLambdaForTesting requires non-const rvalue for mutable lambda binding\. I\.e\.: base::BindLambdaForTesting\(std::move\(lambda\)\)."]
320 auto mutable_lambda = [&]() mutable {};
321 BindLambdaForTesting(mutable_lambda);
324 #elif defined(NCTEST_DISALLOW_BINDLAMBDAFORTESTING_RVALUE_CONST_MUTABLE_LAMBDA) // [r"BindLambdaForTesting requires non-const rvalue for mutable lambda binding\. I\.e\.: base::BindLambdaForTesting\(std::move\(lambda\)\)."]
328 const auto mutable_lambda = [&]() mutable {};
329 BindLambdaForTesting(std::move(mutable_lambda));