clang/test/CXX/expr/expr.prim/expr.prim.lambda/p7.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify
   2
   3 // Check that analysis-based warnings work in lambda bodies.
   4 void analysis_based_warnings() {
   5   (void)[]() -> int { }; // expected-warning{{non-void lambda does not return a value}}
   6 }
   7
   8 // Check that we get the right types of captured variables (the
   9 // semantic-analysis part of p7).
  10 int &check_const_int(int&);
  11 float &check_const_int(const int&);
  12
  13 void test_capture_constness(int i, const int ic) {
  14   (void)[i,ic] ()->void {
  15     float &fr1 = check_const_int(i);
  16     float &fr2 = check_const_int(ic);
  17   };
  18
  19   (void)[=] ()->void {
  20     float &fr1 = check_const_int(i);
  21     float &fr2 = check_const_int(ic);
  22   };
  23
  24   (void)[i,ic] () mutable ->void {
  25     int &ir = check_const_int(i);
  26     float &fr = check_const_int(ic);
  27   };
  28
  29   (void)[=] () mutable ->void {
  30     int &ir = check_const_int(i);
  31     float &fr = check_const_int(ic);
  32   };
  33
  34   (void)[&i,&ic] ()->void {
  35     int &ir = check_const_int(i);
  36     float &fr = check_const_int(ic);
  37   };
  38
  39   (void)[&] ()->void {
  40     int &ir = check_const_int(i);
  41     float &fr = check_const_int(ic);
  42   };
  43 }
  44
  45
  46 struct S1 {
  47   int x, y;
  48   S1 &operator=(int*);
  49   int operator()(int);
  50   void f() {
  51     [&]()->int {
  52       S1 &s1 = operator=(&this->x);
  53       return operator()(this->x + y);
  54     }();
  55   }
  56 };