Implement substitution of a function parameter pack for its set of

instantiated function parameters, enabling instantiation of arbitrary
pack expansions involving function parameter packs. At this point, we
can now correctly compile a simple, variadic print() example:

  #include <iostream>
  #include <string>

  void print() {}

  template<typename Head, typename ...Tail>
  void print(const Head &head, const Tail &...tail) {
    std::cout << head;
    print(tail...);
  }

  int main() {
    std::string hello = "Hello";
    print(hello, ", world!", " ", 2011, '\n');
  }



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123000 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 0 deletions

diff --git a/test/CXX/expr/expr.unary/expr.sizeof/p5-0x.cpp b/test/CXX/expr/expr.unary/expr.sizeof/p5-0x.cpp
index 6ab93db77f..3824615415 100644
--- a/test/CXX/expr/expr.unary/expr.sizeof/p5-0x.cpp
+++ b/test/CXX/expr/expr.unary/expr.sizeof/p5-0x.cpp
@@ -13,6 +13,18 @@ template<int ...Values> struct count_ints {
 int check_types[count_types<short, int, long>::value == 3? 1 : -1];
 int check_ints[count_ints<1, 2, 3, 4, 5>::value == 5? 1 : -1];
 
+// Test instantiation involving function parameter packs.
+struct any {
+  template<typename T> any(T);
+};
+
+template<typename ...Inits>
+void init_me(Inits ...inits) {
+  any array[sizeof...(inits)] = { inits... };
+}
+
+template void init_me<int, float, double*>(int, float, double*);
+
 // Test parser and semantic recovery.
 template<int Value> struct count_ints_2 {
   static const unsigned value = sizeof...(Value); // expected-error{{'Value' does not refer to the name of a parameter pack}}