Add various tests for captures and the reaching scope of the lambda

expression. Implement C++11 [expr.prim.lambda]p12's requirement that
capturing a variable will odr-use it.

llvm-svn: 150237

1 files changed, 48 insertions, 0 deletions

diff --git a/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p12.cpp b/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p12.cpp
new file mode 100644
index 00000000000..5a696d76a58
--- /dev/null
+++ b/clang/test/CXX/expr/expr.prim/expr.prim.lambda/p12.cpp
@@ -0,0 +1,48 @@
+// RUN: %clang_cc1 -std=c++11 %s -Wunused -verify
+
+void odr_used() {
+  int i = 17;
+  [i]{}();
+}
+
+struct ReachingThis {
+  static void static_foo() {
+    (void)[this](){}; // expected-error{{'this' cannot be captured in this context}}
+
+    struct Local {
+      int i;
+
+      void bar() {
+        (void)[this](){};
+        (void)[&](){i = 7; };
+      }
+    };
+  }
+
+  void foo() {
+    (void)[this](){};
+    
+    struct Local {
+      int i;
+
+      static void static_bar() {
+        (void)[this](){}; // expected-error{{'this' cannot be captured in this context}}
+        (void)[&](){i = 7; }; // expected-error{{invalid use of nonstatic data member 'i'}}
+      }
+    };
+  }
+};
+
+void immediately_enclosing(int i) { // expected-note{{'i' declared here}}
+  [i]() {
+    [i] {}();
+  }();
+
+  [=]() {
+    [i] {}();
+  }();
+
+  []() { // expected-note{{lambda expression begins here}}
+    [i] {}(); // expected-error{{variable 'i' cannot be implicitly captured in a lambda with no capture-default specified}}
+  }();
+}