clang/test/Analysis/ptr-iter.cpp

   1 // RUN: %clang_analyze_cc1 %s -std=c++14 -analyzer-output=text -verify \
   2 // RUN: -analyzer-checker=core,alpha.nondeterminism.PointerIteration
   3
   4 #include "Inputs/system-header-simulator-cxx.h"
   5
   6 template<class T>
   7 void f(T x);
   8
   9 void PointerIteration() {
  10   int a = 1, b = 2;
  11   std::set<int> OrderedIntSet = {a, b};
  12   std::set<int *> OrderedPtrSet = {&a, &b};
  13   std::unordered_set<int> UnorderedIntSet = {a, b};
  14   std::unordered_set<int *> UnorderedPtrSet = {&a, &b};
  15
  16   for (auto i : OrderedIntSet) // no-warning
  17     f(i);
  18
  19   for (auto i : OrderedPtrSet) // no-warning
  20     f(i);
  21
  22   for (auto i : UnorderedIntSet) // no-warning
  23     f(i);
  24
  25   for (auto i : UnorderedPtrSet) // expected-warning {{Iteration of pointer-like elements can result in non-deterministic ordering}} [alpha.nondeterminism.PointerIteration]
  26 // expected-note@-1 {{Iteration of pointer-like elements can result in non-deterministic ordering}} [alpha.nondeterminism.PointerIteration]
  27     f(i);
  28 }