Lambda closure types have a conversion function to a block pointer

with the same parameter types and return type as the function call
operator. This is the real answer to

  http://stackoverflow.com/questions/4148242/is-it-possible-to-convert-a-c0x-lambda-to-a-clang-block

:)

llvm-svn: 150620

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/CXX/expr/expr.prim/expr.prim.lambda/blocks.cpp b/clang/test/CXX/expr/expr.prim/expr.prim.lambda/blocks.cpp
index ba2b70e4c3d..0806828c83e 100644
--- a/clang/test/CXX/expr/expr.prim/expr.prim.lambda/blocks.cpp
+++ b/clang/test/CXX/expr/expr.prim/expr.prim.lambda/blocks.cpp
@@ -6,3 +6,10 @@ void block_capture_errors() {
 
   (void)[=] { var = 17; }; // expected-error{{__block variable 'var' cannot be captured in a lambda}}
 }
+
+void conversion_to_block(int captured) {
+  int (^b1)(int) = [=](int x) { return x + captured; };
+
+  const auto lambda = [=](int x) { return x + captured; };
+  int (^b2)(int) = lambda;
+}