clang/test/SemaCXX/warn-self-move.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -Wself-move -std=c++11 -verify %s
   2
   3 // definitions for std::move
   4 namespace std {
   5 inline namespace foo {
   6 template <class T> struct remove_reference { typedef T type; };
   7 template <class T> struct remove_reference<T&> { typedef T type; };
   8 template <class T> struct remove_reference<T&&> { typedef T type; };
   9
  10 template <class T> typename remove_reference<T>::type &&move(T &&t);
  11 }
  12 }
  13
  14 void int_test() {
  15   int x = 5;
  16   x = std::move(x);  // expected-warning{{explicitly moving}}
  17   (x) = std::move(x);  // expected-warning{{explicitly moving}}
  18
  19   using std::move;
  20   x = move(x); // expected-warning{{explicitly moving}} \
  21                    expected-warning {{unqualified call to 'std::move}}
  22 }
  23
  24 int global;
  25 void global_int_test() {
  26   global = std::move(global);  // expected-warning{{explicitly moving}}
  27   (global) = std::move(global);  // expected-warning{{explicitly moving}}
  28
  29   using std::move;
  30   global = move(global); // expected-warning{{explicitly moving}} \
  31                              expected-warning {{unqualified call to 'std::move}}
  32 }
  33
  34 class field_test {
  35   int x;
  36   field_test(field_test&& other) {
  37     x = std::move(x);  // expected-warning{{explicitly moving}}
  38     x = std::move(other.x);
  39     other.x = std::move(x);
  40     other.x = std::move(other.x);  // expected-warning{{explicitly moving}}
  41   }
  42   void withSuggest(int x) {
  43     x = std::move(x); // expected-warning{{explicitly moving variable of type 'int' to itself; did you mean to move to member 'x'?}}
  44   }
  45 };
  46
  47 struct A {};
  48 struct B { A a; };
  49 struct C { C() {}; ~C() {} };
  50 void struct_test() {
  51   A a;
  52   a = std::move(a);  // expected-warning{{explicitly moving}}
  53
  54   B b;
  55   b = std::move(b);  // expected-warning{{explicitly moving}}
  56   b.a = std::move(b.a);  // expected-warning{{explicitly moving}}
  57
  58   C c;
  59   c = std::move(c);  // expected-warning{{explicitly moving}}
  60 }