clang/test/CXX/temp/temp.decls/temp.variadic/ext-blocks.cpp

   1 // RUN: %clang_cc1 -std=c++11 -fblocks -fsyntax-only -verify %s
   2
   3 // Tests the use of blocks with variadic templates.
   4 template<typename ...Args>
   5 int f0(Args ...args) {
   6   return ^ {
   7     return sizeof...(Args);
   8   }() + ^ {
   9     return sizeof...(args);
  10   }();
  11 }
  12
  13 template<typename ...Args>
  14 int f1(Args ...args) {
  15   return ^ {
  16     return f0(args...);
  17   }();
  18 }
  19
  20 template int f0(int, float, double);
  21 template int f1(const char*, int, float, double);
  22
  23 template<typename ...Args>
  24 int f2(Args ...args) {
  25   return ^(Args ...block_args) {
  26     return f1(block_args...);
  27   }(args + 0 ...);
  28 }
  29
  30 template int f2(const char*, int, float, double);
  31
  32 template<typename ...Args>
  33 int f3(Args ...args) {
  34   return ^(Args *...block_args) {
  35     return f1(block_args...);
  36   }(&args...);
  37 }
  38
  39 template int f3(const char*, int, float, double);
  40
  41 template<typename ...Args>
  42 int PR9953(Args ...args) {
  43   return ^(Args *...block_args) {
  44     return f1(block_args); // expected-error{{expression contains unexpanded parameter pack 'block_args'}}
  45   }(&args...);
  46 }