clang/test/CXX/expr/expr.prim/expr.prim.lambda/p8.cpp

   1 // RUN: %clang_cc1 -std=c++11 %s -verify -Wno-c++14-extensions
   2
   3 class X0 {
   4   void explicit_capture() {
   5     int foo;
   6
   7     (void)[foo, foo] () {}; // expected-error {{'foo' can appear only once}}
   8     (void)[this, this] () {}; // expected-error {{'this' can appear only once}}
   9     (void)[=, foo] () {}; // expected-error {{'&' must precede a capture when}}
  10     (void)[=, &foo] () {};
  11     (void)[=, this] () {}; // expected-warning {{C++20 extension}}
  12     (void)[&, foo] () {};
  13     (void)[&, &foo] () {}; // expected-error {{'&' cannot precede a capture when}}
  14     (void)[&, this] () {};
  15   }
  16 };
  17
  18 struct S2 {
  19   void f(int i);
  20   void g(int i);
  21 };
  22
  23 void S2::f(int i) {
  24   (void)[&, i]{ };
  25   (void)[&, &i]{ }; // expected-error{{'&' cannot precede a capture when the capture default is '&'}}
  26   (void)[=, this]{ }; // expected-warning{{C++20 extension}}
  27   (void)[=]{ this->g(i); };
  28   (void)[i, i]{ }; // expected-error{{'i' can appear only once in a capture list}}
  29   (void)[i(0), i(1)]{ }; // expected-error{{'i' can appear only once in a capture list}}
  30   (void)[i, i(1)]{ }; // expected-error{{'i' can appear only once in a capture list}}
  31   (void)[i(0), i]{ }; // expected-error{{'i' can appear only once in a capture list}}
  32 }