1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "optional_gc_object.h"
namespace blink {
class WithOpt : public GarbageCollected<WithOpt> {
public:
virtual void Trace(Visitor*) const {}
private:
absl::optional<Base> optional_field_; // Optional fields are disallowed.
std::optional<Base> optional_field2_;
absl::optional<Traceable>
optional_field3_; // Optional fields are disallowed.
std::optional<Traceable> optional_field4_;
absl::optional<Member<Base>> optional_field5_;
std::optional<Member<Base>> optional_field6_;
base::raw_ptr<Base> raw_ptr_field_;
base::raw_ptr<Traceable> raw_ptr_field2_;
base::raw_ref<Base> raw_ref_field_;
base::raw_ref<Traceable> raw_ref_field2_;
};
void DisallowedUseOfOptional() {
{
absl::optional<Base> optional_base;
(void)optional_base;
absl::optional<Derived> optional_derived;
(void)optional_derived;
absl::optional<Traceable> optional_traceable; // Must be okay.
(void)optional_traceable;
absl::optional<Member<Base>> optional_member; // Must be okay.
(void)optional_member;
new absl::optional<Base>; // New expression with gced optionals are not
// allowed.
new absl::optional<Traceable>; // New expression with traceable optionals
// are not allowed.
new absl::optional<Member<Base>>;
}
{
std::optional<Base> optional_base;
(void)optional_base;
std::optional<Derived> optional_derived;
(void)optional_derived;
std::optional<Traceable> optional_traceable; // Must be okay.
(void)optional_traceable;
std::optional<Member<Base>> optional_member; // Must be okay.
(void)optional_member;
new std::optional<Base>; // New expression with gced optionals are not
// allowed.
new std::optional<Traceable>; // New expression with traceable optionals
// are not allowed.
new std::optional<Member<Base>>;
}
{
base::raw_ptr<Base> raw_ptr_base;
(void)raw_ptr_base;
base::raw_ptr<Derived> raw_ptr_derived;
(void)raw_ptr_derived;
base::raw_ptr<Traceable> raw_ptr_traceable;
(void)raw_ptr_traceable;
new base::raw_ptr<Base>; // New expression with gced raw_ptrs are not
// allowed.
new base::raw_ptr<Traceable>; // New expression with traceable raw_ptrs
// are not allowed.
}
{
base::raw_ref<Base> raw_ref_base;
(void)raw_ref_base;
base::raw_ref<Derived> raw_ref_derived;
(void)raw_ref_derived;
base::raw_ref<Traceable> raw_ref_traceable;
(void)raw_ref_traceable;
new base::raw_ref<Base>; // New expression with gced raw_refs are not
// allowed.
new base::raw_ref<Traceable>; // New expression with traceable raw_refs
// are not allowed.
}
}
class OnStack {
STACK_ALLOCATED();
public:
OnStack() {
(void)optional_field_;
(void)optional_field2_;
(void)optional_field3_;
(void)optional_field4_;
(void)optional_field5_;
(void)optional_field6_;
(void)raw_ptr_field_;
(void)raw_ptr_field2_;
(void)raw_ref_field_;
(void)raw_ref_field2_;
}
private:
// All fields are ok since the class is stack allocated.
absl::optional<Base> optional_field_;
std::optional<Base> optional_field2_;
absl::optional<Traceable> optional_field3_;
std::optional<Traceable> optional_field4_;
absl::optional<Member<Base>> optional_field5_;
std::optional<Member<Base>> optional_field6_;
base::raw_ptr<Base> raw_ptr_field_;
base::raw_ptr<Traceable> raw_ptr_field2_;
base::raw_ref<Base> raw_ref_field_;
base::raw_ref<Traceable> raw_ref_field2_;
};
} // namespace blink
|