clang/test/SemaCXX/for-range-dereference.cpp

   1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
   2 struct Data { };
   3 struct T {
   4   Data *begin();
   5   Data *end();
   6 };
   7
   8 struct NoBegin {
   9   Data *end();
  10 };
  11
  12 struct DeletedEnd : public T {
  13   Data *begin();
  14   Data *end() = delete; //expected-note {{'end' has been explicitly marked deleted here}}
  15 };
  16
  17 struct DeletedADLBegin { };
  18
  19 int* begin(DeletedADLBegin) = delete; //expected-note {{candidate function has been explicitly deleted}} \
  20  expected-note 6 {{candidate function not viable: no known conversion}}
  21
  22 struct PrivateEnd {
  23   Data *begin();
  24
  25  private:
  26   Data *end(); // expected-note 2 {{declared private here}}
  27 };
  28
  29 struct ADLNoEnd { };
  30 Data * begin(ADLNoEnd); // expected-note 7 {{candidate function not viable: no known conversion}}
  31
  32 struct OverloadedStar {
  33   T operator*();
  34 };
  35
  36 void f() {
  37   T t;
  38   for (auto i : t) { }
  39   T *pt;
  40   for (auto i : pt) { } // expected-error{{invalid range expression of type 'T *'; did you mean to dereference it with '*'?}}
  41
  42   int arr[10];
  43   for (auto i : arr) { }
  44   int (*parr)[10];
  45   for (auto i : parr) { }// expected-error{{invalid range expression of type 'int (*)[10]'; did you mean to dereference it with '*'?}}
  46
  47   NoBegin NB;
  48   for (auto i : NB) { }// expected-error{{invalid range expression of type 'NoBegin'; no viable 'begin' function available}}
  49   NoBegin *pNB;
  50   for (auto i : pNB) { }// expected-error{{invalid range expression of type 'NoBegin *'; no viable 'begin' function available}}
  51   NoBegin **ppNB;
  52   for (auto i : ppNB) { }// expected-error{{invalid range expression of type 'NoBegin **'; no viable 'begin' function available}}
  53   NoBegin *****pppppNB;
  54   for (auto i : pppppNB) { }// expected-error{{invalid range expression of type 'NoBegin *****'; no viable 'begin' function available}}
  55
  56   ADLNoEnd ANE;
  57   for (auto i : ANE) { } // expected-error{{invalid range expression of type 'ADLNoEnd'; no viable 'end' function available}}
  58   ADLNoEnd *pANE;
  59   for (auto i : pANE) { } // expected-error{{invalid range expression of type 'ADLNoEnd *'; no viable 'begin' function available}}
  60
  61   DeletedEnd DE;
  62   for (auto i : DE) { } // expected-error{{attempt to use a deleted function}} \
  63 expected-note {{when looking up 'end' function for range expression of type 'DeletedEnd'}}
  64   DeletedEnd *pDE;
  65
  66   for (auto i : pDE) { } // expected-error {{invalid range expression of type 'DeletedEnd *'; no viable 'begin' function available}}
  67
  68   PrivateEnd PE;
  69   // FIXME: This diagnostic should be improved, as it does not specify that
  70   // the range is invalid.
  71   for (auto i : PE) { } // expected-error{{'end' is a private member of 'PrivateEnd'}}
  72
  73   PrivateEnd *pPE;
  74   for (auto i : pPE) { }// expected-error {{invalid range expression of type 'PrivateEnd *'}}
  75   // expected-error@-1 {{'end' is a private member of 'PrivateEnd'}}
  76
  77   DeletedADLBegin DAB;
  78   for (auto i : DAB) { } // expected-error {{call to deleted function 'begin'}}\
  79   expected-note {{when looking up 'begin' function for range expression of type 'DeletedADLBegin'}}
  80
  81   OverloadedStar OS;
  82   for (auto i : *OS) { }
  83
  84   for (auto i : OS) { } // expected-error {{invalid range expression of type 'OverloadedStar'; did you mean to dereference it with '*'?}}
  85
  86   for (Data *p : pt) { } // expected-error {{invalid range expression of type 'T *'; did you mean to dereference it with '*'?}}
  87   // expected-error@-1 {{no viable conversion from 'Data' to 'Data *'}}
  88   // expected-note@4 {{selected 'begin' function with iterator type 'Data *'}}
  89 }