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      1 // Copyright (c) 2012 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.
      4 
      5 // This is a "No Compile Test" suite.
      6 // http://dev.chromium.org/developers/testing/no-compile-tests
      7 
      8 #include "base/memory/weak_ptr.h"
      9 
     10 namespace base {
     11 
     12 struct Producer : SupportsWeakPtr<Producer> {};
     13 struct DerivedProducer : Producer {};
     14 struct OtherDerivedProducer : Producer {};
     15 struct MultiplyDerivedProducer : Producer,
     16                                  SupportsWeakPtr<MultiplyDerivedProducer> {};
     17 struct Unrelated {};
     18 struct DerivedUnrelated : Unrelated {};
     19 
     20 #if defined(NCTEST_AUTO_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*const'"]
     21 
     22 void WontCompile() {
     23   Producer f;
     24   WeakPtr<Producer> ptr = f.AsWeakPtr();
     25   WeakPtr<DerivedProducer> derived_ptr = ptr;
     26 }
     27 
     28 #elif defined(NCTEST_STATIC_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*const'"]
     29 
     30 void WontCompile() {
     31   Producer f;
     32   WeakPtr<Producer> ptr = f.AsWeakPtr();
     33   WeakPtr<DerivedProducer> derived_ptr =
     34       static_cast<WeakPtr<DerivedProducer> >(ptr);
     35 }
     36 
     37 #elif defined(NCTEST_AUTO_REF_DOWNCAST)  // [r"fatal error: non-const lvalue reference to type 'WeakPtr<base::DerivedProducer>' cannot bind to a value of unrelated type 'WeakPtr<base::Producer>'"]
     38 
     39 void WontCompile() {
     40   Producer f;
     41   WeakPtr<Producer> ptr = f.AsWeakPtr();
     42   WeakPtr<DerivedProducer>& derived_ptr = ptr;
     43 }
     44 
     45 #elif defined(NCTEST_STATIC_REF_DOWNCAST)  // [r"fatal error: non-const lvalue reference to type 'WeakPtr<base::DerivedProducer>' cannot bind to a value of unrelated type 'WeakPtr<base::Producer>'"]
     46 
     47 void WontCompile() {
     48   Producer f;
     49   WeakPtr<Producer> ptr = f.AsWeakPtr();
     50   WeakPtr<DerivedProducer>& derived_ptr =
     51       static_cast<WeakPtr<DerivedProducer>&>(ptr);
     52 }
     53 
     54 #elif defined(NCTEST_STATIC_ASWEAKPTR_DOWNCAST)  // [r"no matching function"]
     55 
     56 void WontCompile() {
     57   Producer f;
     58   WeakPtr<DerivedProducer> ptr =
     59       SupportsWeakPtr<Producer>::StaticAsWeakPtr<DerivedProducer>(&f);
     60 }
     61 
     62 #elif defined(NCTEST_UNSAFE_HELPER_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*const'"]
     63 
     64 void WontCompile() {
     65   Producer f;
     66   WeakPtr<DerivedProducer> ptr = AsWeakPtr(&f);
     67 }
     68 
     69 #elif defined(NCTEST_UNSAFE_INSTANTIATED_HELPER_DOWNCAST)  // [r"no matching function"]
     70 
     71 void WontCompile() {
     72   Producer f;
     73   WeakPtr<DerivedProducer> ptr = AsWeakPtr<DerivedProducer>(&f);
     74 }
     75 
     76 #elif defined(NCTEST_UNSAFE_WRONG_INSANTIATED_HELPER_DOWNCAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::DerivedProducer \*' with an lvalue of type 'base::Producer \*const'"]
     77 
     78 void WontCompile() {
     79   Producer f; 
     80   WeakPtr<DerivedProducer> ptr = AsWeakPtr<Producer>(&f);
     81 }
     82 
     83 #elif defined(NCTEST_UNSAFE_HELPER_CAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::OtherDerivedProducer \*' with an lvalue of type 'base::DerivedProducer \*const'"]
     84 
     85 void WontCompile() {
     86   DerivedProducer f;
     87   WeakPtr<OtherDerivedProducer> ptr = AsWeakPtr(&f);
     88 }
     89 
     90 #elif defined(NCTEST_UNSAFE_INSTANTIATED_HELPER_SIDECAST)  // [r"fatal error: no matching function for call to 'AsWeakPtr'"]
     91 
     92 void WontCompile() {
     93   DerivedProducer f;
     94   WeakPtr<OtherDerivedProducer> ptr = AsWeakPtr<OtherDerivedProducer>(&f);
     95 }
     96 
     97 #elif defined(NCTEST_UNSAFE_WRONG_INSTANTIATED_HELPER_SIDECAST)  // [r"fatal error: cannot initialize a member subobject of type 'base::OtherDerivedProducer \*' with an lvalue of type 'base::DerivedProducer \*const'"]
     98 
     99 void WontCompile() {
    100   DerivedProducer f;
    101   WeakPtr<OtherDerivedProducer> ptr = AsWeakPtr<DerivedProducer>(&f);
    102 }
    103 
    104 #elif defined(NCTEST_UNRELATED_HELPER)  // [r"fatal error: cannot initialize a member subobject of type 'base::Unrelated \*' with an lvalue of type 'base::DerivedProducer \*const'"]
    105 
    106 void WontCompile() {
    107   DerivedProducer f;
    108   WeakPtr<Unrelated> ptr = AsWeakPtr(&f);
    109 }
    110 
    111 #elif defined(NCTEST_UNRELATED_INSTANTIATED_HELPER)  // [r"no matching function"]
    112 
    113 void WontCompile() {
    114   DerivedProducer f;
    115   WeakPtr<Unrelated> ptr = AsWeakPtr<Unrelated>(&f);
    116 }
    117 
    118 #elif defined(NCTEST_COMPLETELY_UNRELATED_HELPER)  // [r"fatal error: static_assert failed \"AsWeakPtr argument must inherit from SupportsWeakPtr\""]
    119 
    120 void WontCompile() {
    121   Unrelated f;
    122   WeakPtr<Unrelated> ptr = AsWeakPtr(&f);
    123 }
    124 
    125 #elif defined(NCTEST_DERIVED_COMPLETELY_UNRELATED_HELPER)  // [r"fatal error: static_assert failed \"AsWeakPtr argument must inherit from SupportsWeakPtr\""]
    126 
    127 void WontCompile() {
    128   DerivedUnrelated f;
    129   WeakPtr<Unrelated> ptr = AsWeakPtr(&f);
    130 }
    131 
    132 #elif defined(NCTEST_AMBIGUOUS_ANCESTORS)  // [r"fatal error: ambiguous conversion from derived class 'base::MultiplyDerivedProducer' to base class 'base::internal::SupportsWeakPtrBase':"]
    133 
    134 void WontCompile() {
    135   MultiplyDerivedProducer f;
    136   WeakPtr<MultiplyDerivedProducer> ptr = AsWeakPtr(&f);
    137 }
    138 
    139 #endif
    140 
    141 }
    142