lldb/test/API/commands/expression/expr_inside_lambda/main.cpp

   1 #include <cassert>
   2 #include <cstdio>
   3
   4 namespace {
   5 int global_var = -5;
   6 } // namespace
   7
   8 struct Baz {
   9   virtual ~Baz() = default;
  10
  11   virtual int baz_virt() = 0;
  12
  13   int base_base_var = 12;
  14 };
  15
  16 struct Bar : public Baz {
  17   virtual ~Bar() = default;
  18
  19   virtual int baz_virt() override {
  20     base_var = 10;
  21     return 1;
  22   }
  23
  24   int base_var = 15;
  25 };
  26
  27 struct Foo : public Bar {
  28   int class_var = 9;
  29   int shadowed = -137;
  30   int *class_ptr;
  31
  32   virtual ~Foo() = default;
  33
  34   virtual int baz_virt() override {
  35     shadowed = -1;
  36     return 2;
  37   }
  38
  39   void method() {
  40     int local_var = 137;
  41     int shadowed;
  42     class_ptr = &local_var;
  43     auto lambda = [&shadowed, this, &local_var,
  44                    local_var_copy = local_var]() mutable {
  45       int lambda_local_var = 5;
  46       shadowed = 5;
  47       class_var = 109;
  48       --base_var;
  49       --base_base_var;
  50       std::puts("break here");
  51
  52       auto nested_lambda = [this, &lambda_local_var, local_var] {
  53         std::puts("break here");
  54         lambda_local_var = 0;
  55       };
  56
  57       nested_lambda();
  58       --local_var_copy;
  59       std::puts("break here");
  60
  61       struct LocalLambdaClass {
  62         int lambda_class_local = -12345;
  63         Foo *outer_ptr;
  64
  65         void inner_method() {
  66           auto lambda = [this] {
  67             std::puts("break here");
  68             lambda_class_local = -2;
  69             outer_ptr->class_var *= 2;
  70           };
  71
  72           lambda();
  73         }
  74       };
  75
  76       LocalLambdaClass l;
  77       l.outer_ptr = this;
  78       l.inner_method();
  79     };
  80     lambda();
  81   }
  82
  83   void non_capturing_method() {
  84     int local = 5;
  85     int local2 = 10;
  86
  87     class_var += [=] {
  88       std::puts("break here");
  89       return local + local2;
  90     }();
  91   }
  92 };
  93
  94 int main() {
  95   Foo f;
  96   f.method();
  97   f.non_capturing_method();
  98   return global_var;
  99 }