1 files changed, 1363 insertions, 0 deletions
diff --git a/test/SemaCXX/cxx1y-generic-lambdas-capturing.cpp b/test/SemaCXX/cxx1y-generic-lambdas-capturing.cpp
new file mode 100644
index 0000000..8bd4f42
--- /dev/null
+++ b/test/SemaCXX/cxx1y-generic-lambdas-capturing.cpp
@@ -0,0 +1,1363 @@
+// RUN: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -emit-llvm-only %s
+// DONTRUNYET: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fdelayed-template-parsing %s -DDELAYED_TEMPLATE_PARSING
+// DONTRUNYET: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fms-extensions %s -DMS_EXTENSIONS
+// DONTRUNYET: %clang_cc1 -std=c++1y -verify -fsyntax-only -fblocks -fdelayed-template-parsing -fms-extensions %s -DMS_EXTENSIONS -DDELAYED_TEMPLATE_PARSING
+
+constexpr int ODRUSE_SZ = sizeof(char);
+
+template<class T, int N>
+void f(T, const int (&)[N]) { }
+
+template<class T>
+void f(const T&, const int (&)[ODRUSE_SZ]) { }
+
+#define DEFINE_SELECTOR(x)   \
+  int selector_ ## x[sizeof(x) == ODRUSE_SZ ? ODRUSE_SZ : ODRUSE_SZ + 5]
+
+#define F_CALL(x, a) f(x, selector_ ## a)
+
+// This is a risky assumption, because if an empty class gets captured by value
+// the lambda's size will still be '1' 
+#define ASSERT_NO_CAPTURES(L) static_assert(sizeof(L) == 1, "size of closure with no captures must be 1")
+#define ASSERT_CLOSURE_SIZE_EXACT(L, N) static_assert(sizeof(L) == (N), "size of closure must be " #N)
+#define ASSERT_CLOSURE_SIZE(L, N) static_assert(sizeof(L) >= (N), "size of closure must be >=" #N)
+
+
+namespace sample {
+  struct X {  
+    int i;
+    X(int i) : i(i) { }
+  };
+} 
+ 
+namespace test_transformations_in_templates {
+template<class T> void foo(T t) {
+  auto L = [](auto a) { return a; };
+}
+template<class T> void foo2(T t) {
+  auto L = [](auto a) -> void { 
+    auto M = [](char b) -> void {
+      auto N = [](auto c) -> void { 
+        int selector[sizeof(c) == 1 ? 
+                      (sizeof(b) == 1 ? 1 : 2) 
+                      : 2
+                    ]{};      
+      };  
+      N('a');
+    };    
+  };
+  L(3.14);
+}
+
+void doit() {
+  foo(3);
+  foo('a');
+  foo2('A');
+}
+}
+
+namespace test_return_type_deduction {
+
+void doit() {
+
+  auto L = [](auto a, auto b) {
+    if ( a > b ) return a;
+    return b;
+  };
+  L(2, 4);
+  {
+    auto L2 = [](auto a, int i) {
+      return a + i;
+    };
+    L2(3.14, 2);
+  }
+  {
+    int a; //expected-note{{declared here}}
+    auto B = []() { return ^{ return a; }; }; //expected-error{{cannot be implicitly capture}}\
+                                              //expected-note{{begins here}}
+  //[](){ return ({int b = 5; return 'c'; 'x';}); };
+
+  //auto X = ^{ return a; };
+  
+  //auto Y = []() -> auto { return 3; return 'c'; };
+
+  }  
+}  
+}
+
+
+namespace test_no_capture{
+void doit() {
+  const int x = 10; //expected-note{{declared here}}
+  {
+    // should not capture 'x' - variable undergoes lvalue-to-rvalue
+    auto L = [=](auto a) {
+      int y = x;
+      return a + y;
+    };
+    ASSERT_NO_CAPTURES(L);
+  }
+  {
+    // should not capture 'x' - even though certain instantiations require
+    auto L = [](auto a) { //expected-note{{begins here}}
+      DEFINE_SELECTOR(a);
+      F_CALL(x, a); //expected-error{{'x' cannot be implicitly captured}}
+    };
+    ASSERT_NO_CAPTURES(L);
+    L('s'); //expected-note{{in instantiation of}}
+  }
+  {
+    // Does not capture because no default capture in inner most lambda 'b'
+    auto L = [=](auto a) {
+      return [=](int p) {
+        return [](auto b) {
+          DEFINE_SELECTOR(a);
+          F_CALL(x, a); 
+          return 0;        
+        }; 
+      };
+    };
+    ASSERT_NO_CAPTURES(L);
+  }  
+}  // doit
+} // namespace
+
+namespace test_capture_of_potentially_evaluated_expression {
+void doit() {
+  const int x = 5;
+  {
+    auto L = [=](auto a) {
+      DEFINE_SELECTOR(a);
+      F_CALL(x, a);
+    };
+    static_assert(sizeof(L) == 4, "Must be captured");
+  }
+  {
+    int j = 0; //expected-note{{declared}}
+    auto L = [](auto a) {  //expected-note{{begins here}}
+      return j + 1; //expected-error{{cannot be implicitly captured}}
+    };
+  }
+  {
+    const int x = 10;
+    auto L = [](auto a) {
+      //const int y = 20;
+      return [](int p) { 
+        return [](auto b) { 
+          DEFINE_SELECTOR(a);
+          F_CALL(x, a);  
+          return 0;        
+        }; 
+      };
+    };
+    auto M = L(3);
+    auto N = M(5);
+    
+  }
+  
+  { // if the nested capture does not implicitly or explicitly allow any captures
+    // nothing should capture - and instantiations will create errors if needed.
+    const int x = 0;
+    auto L = [=](auto a) { // <-- #A
+      const int y = 0;
+      return [](auto b) { // <-- #B
+        int c[sizeof(b)];
+        f(x, c);
+        f(y, c);
+        int i = x;
+      };
+    };
+    ASSERT_NO_CAPTURES(L);
+    auto M_int = L(2);
+    ASSERT_NO_CAPTURES(M_int);
+  }
+  { // Permutations of this example must be thoroughly tested!
+    const int x = 0;
+    sample::X cx{5};
+    auto L = [=](auto a) { 
+      const int z = 3;
+      return [&,a](auto b) {
+        const int y = 5;    
+        return [=](auto c) { 
+          int d[sizeof(a) == sizeof(c) || sizeof(c) == sizeof(b) ? 2 : 1];
+          f(x, d);
+          f(y, d);
+          f(z, d);
+          decltype(a) A = a;
+          decltype(b) B = b;
+          const int &i = cx.i;
+        }; 
+      };
+    };
+    auto M = L(3)(3.5);
+    M(3.14);
+  }
+}
+namespace Test_no_capture_of_clearly_no_odr_use {
+auto foo() {
+ const int x = 10; 
+ auto L = [=](auto a) {
+    return  [=](auto b) {
+      return [=](auto c) {
+        int A = x;
+        return A;
+      };
+    };
+  };
+  auto M = L(1);
+  auto N = M(2.14);
+  ASSERT_NO_CAPTURES(L);
+  ASSERT_NO_CAPTURES(N);
+  
+  return 0;
+}
+}
+
+namespace Test_capture_of_odr_use_var {
+auto foo() {
+ const int x = 10; 
+ auto L = [=](auto a) {
+    return  [=](auto b) {
+      return [=](auto c) {
+        int A = x;
+        const int &i = x;
+        decltype(a) A2 = a;
+        return A;
+      };
+    };
+  };
+  auto M_int = L(1);
+  auto N_int_int = M_int(2);
+  ASSERT_CLOSURE_SIZE_EXACT(L, sizeof(x));
+  // M_int captures both a & x   
+  ASSERT_CLOSURE_SIZE_EXACT(M_int, sizeof(x) + sizeof(int));
+  // N_int_int captures both a & x   
+  ASSERT_CLOSURE_SIZE_EXACT(N_int_int, sizeof(x) + sizeof(int)); 
+  auto M_double = L(3.14);
+  ASSERT_CLOSURE_SIZE(M_double, sizeof(x) + sizeof(double));
+  
+  return 0;
+}
+auto run = foo();
+}
+
+}    
+namespace more_nested_captures_1 {
+template<class T> struct Y {
+  static void f(int, double, ...) { }
+  template<class R> 
+  static void f(const int&, R, ...) { }
+  template<class R>
+  void foo(R t) {
+    const int x = 10; //expected-note{{declared here}}
+    auto L = [](auto a) { 
+       return [=](auto b) {
+        return [=](auto c) { 
+          f(x, c, b, a);  //expected-error{{reference to local variable 'x'}}
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3.14);
+    N(5);  //expected-note{{in instantiation of}}
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
+}
+
+
+namespace more_nested_captures_1_1 {
+template<class T> struct Y {
+  static void f(int, double, ...) { }
+  template<class R> 
+  static void f(const int&, R, ...) { }
+  template<class R>
+  void foo(R t) {
+    const int x = 10; //expected-note{{declared here}}
+    auto L = [](auto a) { 
+       return [=](char b) {
+        return [=](auto c) { 
+          f(x, c, b, a);  //expected-error{{reference to local variable 'x'}}
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3.14);
+    N(5);  //expected-note{{in instantiation of}}
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
+}
+namespace more_nested_captures_1_2 {
+template<class T> struct Y {
+  static void f(int, double, ...) { }
+  template<class R> 
+  static void f(const int&, R, ...) { }
+  template<class R>
+  void foo(R t) {
+    const int x = 10; 
+    auto L = [=](auto a) { 
+       return [=](char b) {
+        return [=](auto c) { 
+          f(x, c, b, a);  
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3.14);
+    N(5);  
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0); 
+}
+
+namespace more_nested_captures_1_3 {
+template<class T> struct Y {
+  static void f(int, double, ...) { }
+  template<class R> 
+  static void f(const int&, R, ...) { }
+  template<class R>
+  void foo(R t) {
+    const int x = 10; //expected-note{{declared here}}
+    auto L = [=](auto a) { 
+       return [](auto b) {
+        const int y = 0;
+        return [=](auto c) { 
+          f(x, c, b);  //expected-error{{reference to local variable 'x'}}
+          f(y, b, c);
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3.14);
+    N(5);  //expected-note{{in instantiation of}}
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
+}
+
+
+namespace more_nested_captures_1_4 {
+template<class T> struct Y {
+  static void f(int, double, ...) { }
+  template<class R> 
+  static void f(const int&, R, ...) { }
+  template<class R>
+  void foo(R t) {
+    const int x = 10; //expected-note{{declared here}}
+    auto L = [=](auto a) {
+       T t2{t};       
+       return [](auto b) {
+        const int y = 0; //expected-note{{declared here}}
+        return [](auto c) { //expected-note 2{{lambda expression begins here}}
+          f(x, c);  //expected-error{{variable 'x'}}
+          f(y, c);  //expected-error{{variable 'y'}}
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N_char = M('b');
+    N_char(3.14);
+    auto N_double = M(3.14);
+    N_double(3.14);
+    N_char(3);  //expected-note{{in instantiation of}}
+  }
+};
+Y<int> yi;
+int run = (yi.foo('a'), 0); //expected-note{{in instantiation of}}
+}
+
+
+namespace more_nested_captures_2 {
+template<class T> struct Y {
+  static void f(int, double) { }
+  template<class R> 
+  static void f(const int&, R) { }
+  template<class R> 
+  void foo(R t) {
+    const int x = 10;
+    auto L = [=](auto a) { 
+       return [=](auto b) {
+        return [=](auto c) { 
+          f(x, c);  
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3);
+    N(3.14);
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0);
+
+}
+
+namespace more_nested_captures_3 {
+template<class T> struct Y {
+  static void f(int, double) { }
+  template<class R> 
+  static void f(const int&, R) { }
+  template<class R> 
+  void foo(R t) {
+    const int x = 10; //expected-note{{declared here}}
+    auto L = [](auto a) { 
+       return [=](auto b) {
+        return [=](auto c) { 
+          f(x, c);   //expected-error{{reference to local variable 'x'}}
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3); //expected-note{{in instantiation of}}
+    N(3.14);
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
+
+}
+
+namespace more_nested_captures_4 {
+template<class T> struct Y {
+  static void f(int, double) { }
+  template<class R> 
+  static void f(const int&, R) { }
+  template<class R> 
+  void foo(R t) {
+    const int x = 10;  //expected-note{{'x' declared here}}
+    auto L = [](auto a) { 
+       return [=](char b) {
+        return [=](auto c) { 
+          f(x, c);  //expected-error{{reference to local variable 'x'}}
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3); //expected-note{{in instantiation of}}
+    N(3.14);
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0); //expected-note{{in instantiation of}}
+
+}
+
+namespace more_nested_captures_5 {
+template<class T> struct Y {
+  static void f(int, double) { }
+  template<class R> 
+  static void f(const int&, R) { }
+  template<class R> 
+  void foo(R t) {
+    const int x = 10;
+    auto L = [=](auto a) { 
+       return [=](char b) {
+        return [=](auto c) { 
+          f(x, c);   
+          return 0; 
+        };
+      };
+    };
+    auto M = L(t);
+    auto N = M('b');
+    N(3); 
+    N(3.14);
+  }
+};
+Y<int> yi;
+int run = (yi.foo(3.14), 0);
+
+}
+
+namespace lambdas_in_NSDMIs {
+template<class T>
+  struct L {
+      T t{};
+      T t2 = ([](auto a) { return [](auto b) { return b; };})(t)(t);    
+      T t3 = ([](auto a) { return a; })(t);    
+  };
+  L<int> l; 
+  int run = l.t2; 
+}
+namespace test_nested_decltypes_in_trailing_return_types {
+int foo() {
+  auto L = [](auto a) {
+      return [](auto b, decltype(a) b2) -> decltype(a) {
+        return decltype(a){};
+      };
+  };
+  auto M = L(3.14);
+  M('a', 6.26);
+  return 0;
+}
+}
+
+namespace more_this_capture_1 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  void foo() {
+    {
+      auto L = [=](auto a) {
+        f(a);
+      };
+      L(3);
+      L(3.13);
+    }
+    {
+      auto L = [](auto a) {
+        f(a); //expected-error{{this}}
+      };
+      L(3.13);
+      L(2); //expected-note{{in instantiation}}
+    }
+  }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [](int i) {
+        return [=](auto b) {
+          f(b); 
+          int x = i;
+        };
+      };
+    };
+    auto M = L(0.0); 
+    auto N = M(3);
+    N(5.32); // OK 
+    return 0;
+  }
+};
+int run = X{}.g();
+}
+namespace more_this_capture_1_1 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [](int i) {
+        return [=](auto b) {
+          f(decltype(a){}); //expected-error{{this}}
+          int x = i;
+        };
+      };
+    };
+    auto M = L(0.0);  
+    auto N = M(3);
+    N(5.32); // OK 
+    L(3); // expected-note{{instantiation}}
+    return 0;
+  }
+};
+int run = X{}.g();
+}
+
+namespace more_this_capture_1_1_1 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [](auto b) {
+        return [=](int i) {
+          f(b); 
+          f(decltype(a){}); //expected-error{{this}}
+        };
+      };
+    };
+    auto M = L(0.0);  // OK
+    auto N = M(3.3); //OK
+    auto M_int = L(0); //expected-note{{instantiation}}
+    return 0;
+  }
+};
+int run = X{}.g();
+}
+
+
+namespace more_this_capture_1_1_1_1 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [](auto b) {
+        return [=](int i) {
+          f(b); //expected-error{{this}}
+          f(decltype(a){}); 
+        };
+      };
+    };
+    auto M_double = L(0.0);  // OK
+    auto N = M_double(3); //expected-note{{instantiation}}
+    
+    return 0;
+  }
+};
+int run = X{}.g();
+}
+
+namespace more_this_capture_2 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [](int i) {
+        return [=](auto b) {
+          f(b); //expected-error{{'this' cannot}}
+          int x = i;
+        };
+      };
+    };
+    auto M = L(0.0); 
+    auto N = M(3);
+    N(5); // NOT OK expected-note{{in instantiation of}}
+    return 0;
+  }
+};
+int run = X{}.g();
+}
+namespace diagnose_errors_early_in_generic_lambdas {
+
+int foo()
+{
+
+  { // This variable is used and must be caught early, do not need instantiation
+    const int x = 0; //expected-note{{declared}}
+    auto L = [](auto a) { //expected-note{{begins}}
+      const int &r = x; //expected-error{{variable}}      
+    };
+  }
+  { // This variable is not used 
+    const int x = 0; 
+    auto L = [](auto a) { 
+      int i = x;       
+    };
+  }
+  { 
+  
+    const int x = 0; //expected-note{{declared}}
+    auto L = [=](auto a) { // <-- #A
+      const int y = 0;
+      return [](auto b) { //expected-note{{begins}}
+        int c[sizeof(b)];
+        f(x, c);
+        f(y, c);
+        int i = x;
+        // This use will always be an error regardless of instantatiation
+        // so diagnose this early.
+        const int &r = x; //expected-error{{variable}}
+      };
+    };
+    
+  }
+  return 0;
+}
+
+int run = foo();
+}
+
+namespace generic_nongenerics_interleaved_1 {
+int foo() {
+  {
+    auto L = [](int a) {
+      int y = 10;
+      return [=](auto b) { 
+        return a + y;
+      };
+    };
+    auto M = L(3);
+    M(5);
+  }
+  {
+    int x;
+    auto L = [](int a) {
+      int y = 10;
+      return [=](auto b) { 
+        return a + y;
+      };
+    };
+    auto M = L(3);
+    M(5);
+  }
+  {
+    // FIXME: why are there 2 error messages here?
+    int x;
+    auto L = [](auto a) { //expected-note {{declared here}}
+      int y = 10; //expected-note {{declared here}}
+      return [](int b) { //expected-note 2{{expression begins here}}
+        return [=] (auto c) {
+          return a + y; //expected-error 2{{cannot be implicitly captured}}
+        };
+      };
+    };
+  }
+  {
+    int x;
+    auto L = [](auto a) { 
+      int y = 10; 
+      return [=](int b) { 
+        return [=] (auto c) {
+          return a + y; 
+        };
+      };
+    };
+  }
+  return 1;
+}
+
+int run = foo();
+}
+namespace dont_capture_refs_if_initialized_with_constant_expressions {
+
+auto foo(int i) {
+  // This is surprisingly not odr-used within the lambda!
+  static int j;
+  j = i;
+  int &ref_j = j;
+  return [](auto a) { return ref_j; }; // ok
+}
+
+template<class T>
+auto foo2(T t) {
+  // This is surprisingly not odr-used within the lambda!
+  static T j;
+  j = t;
+  T &ref_j = j;
+  return [](auto a) { return ref_j; }; // ok
+}
+
+int do_test() {
+  auto L = foo(3);
+  auto L_int = L(3);
+  auto L_char = L('a');
+  auto L1 = foo2(3.14);
+  auto L1_int = L1(3);
+  auto L1_char = L1('a');
+  return 0;
+}
+
+} // dont_capture_refs_if_initialized_with_constant_expressions
+
+namespace test_conversion_to_fptr {
+
+template<class T> struct X {
+
+  T (*fp)(T) = [](auto a) { return a; };
+  
+};
+
+X<int> xi;
+
+template<class T> 
+void fooT(T t, T (*fp)(T) = [](auto a) { return a; }) {
+  fp(t);
+}
+
+int test() {
+{
+  auto L = [](auto a) { return a; };
+  int (*fp)(int) = L;
+  fp(5);
+  L(3);
+  char (*fc)(char) = L;
+  fc('b');
+  L('c');
+  double (*fd)(double) = L;
+  fd(3.14);
+  fd(6.26);
+  L(4.25);
+}
+{
+  auto L = [](auto a) ->int { return a; }; //expected-note 2{{candidate template ignored}}
+  int (*fp)(int) = L;
+  char (*fc)(char) = L; //expected-error{{no viable conversion}}
+  double (*fd)(double) = L; //expected-error{{no viable conversion}}
+}
+{
+  int x = 5;
+  auto L = [=](auto b, char c = 'x') {
+    int i = x;
+    return [](auto a) ->decltype(a) { return a; };
+  };
+  int (*fp)(int) = L(8);
+  fp(5);
+  L(3);
+  char (*fc)(char) = L('a');
+  fc('b');
+  L('c');
+  double (*fd)(double) = L(3.14);
+  fd(3.14);
+  fd(6.26);
+
+}
+{
+ auto L = [=](auto b) {
+    return [](auto a) ->decltype(b)* { return (decltype(b)*)0; };
+  };
+  int* (*fp)(int) = L(8);
+  fp(5);
+  L(3);
+  char* (*fc)(char) = L('a');
+  fc('b');
+  L('c');
+  double* (*fd)(double) = L(3.14);
+  fd(3.14);
+  fd(6.26);
+}
+{
+ auto L = [=](auto b) {
+    return [](auto a) ->decltype(b)* { return (decltype(b)*)0; }; //expected-note{{candidate template ignored}}
+  };
+  char* (*fp)(int) = L('8');
+  fp(5);
+  char* (*fc)(char) = L('a');
+  fc('b');
+  double* (*fi)(int) = L(3.14);
+  fi(5);
+  int* (*fi2)(int) = L(3.14); //expected-error{{no viable conversion}}
+}
+
+{
+ auto L = [=](auto b) {
+    return [](auto a) { 
+      return [=](auto c) { 
+        return [](auto d) ->decltype(a + b + c + d) { return d; }; 
+      }; 
+    }; 
+  };
+  int (*fp)(int) = L('8')(3)(short{});
+  double (*fs)(char) = L(3.14)(short{})('4');
+}
+
+  fooT(3);
+  fooT('a');
+  fooT(3.14);
+  fooT("abcdefg");
+  return 0;
+}
+int run2 = test();
+
+}
+
+
+namespace this_capture {
+void f(char, int) { }
+template<class T> 
+void f(T, const int&) { }
+
+struct X {
+  int x = 0;
+  void foo() {
+    auto L = [=](auto a) {
+         return [=](auto b) {
+            //f(a, x++);
+            x++;
+         };
+    };
+    L('a')(5);
+    L('b')(4);
+    L(3.14)('3');
+    
+  }
+
+};
+
+int run = (X{}.foo(), 0);
+
+namespace this_capture_unresolvable {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto lam = [=](auto a) { f(a); }; // captures 'this'
+    lam(0); // ok.
+    lam(0.0); // ok.
+    return 0;
+  }
+  int g2() {
+    auto lam = [](auto a) { f(a); }; // expected-error{{'this'}}
+    lam(0); // expected-note{{in instantiation of}}
+    lam(0.0); // ok.
+    return 0;
+  }
+  double (*fd)(double) = [](auto a) { f(a); return a; };
+  
+};
+
+int run = X{}.g();
+
+}
+
+namespace check_nsdmi_and_this_capture_of_member_functions {
+
+struct FunctorDouble {
+  template<class T> FunctorDouble(T t) { t(2.14); };
+};
+struct FunctorInt {
+  template<class T> FunctorInt(T t) { t(2); }; //expected-note{{in instantiation of}}
+};
+
+template<class T> struct YUnresolvable {
+  void f(int) { }
+  static void f(double) { }
+  
+  T t = [](auto a) { f(a); return a; }; 
+  T t2 = [=](auto b) { f(b); return b; };
+};
+
+template<class T> struct YUnresolvable2 {
+  void f(int) { }
+  static void f(double) { }
+  
+  T t = [](auto a) { f(a); return a; }; //expected-error{{'this'}} \
+                                        //expected-note{{in instantiation of}}
+  T t2 = [=](auto b) { f(b); return b; };
+};
+
+
+YUnresolvable<FunctorDouble> yud;
+// This will cause an error since it call's with an int and calls a member function.
+YUnresolvable2<FunctorInt> yui;
+
+
+template<class T> struct YOnlyStatic {
+  static void f(double) { }
+  
+  T t = [](auto a) { f(a); return a; };
+};
+YOnlyStatic<FunctorDouble> yos;
+template<class T> struct YOnlyNonStatic {
+  void f(int) { }
+  
+  T t = [](auto a) { f(a); return a; }; //expected-error{{'this'}}
+};
+
+
+}
+
+
+namespace check_nsdmi_and_this_capture_of_data_members {
+
+struct FunctorDouble {
+  template<class T> FunctorDouble(T t) { t(2.14); };
+};
+struct FunctorInt {
+  template<class T> FunctorInt(T t) { t(2); }; 
+};
+
+template<class T> struct YThisCapture {
+  const int x = 10;
+  static double d; 
+  T t = [](auto a) { return x; }; //expected-error{{'this'}}
+  T t2 = [](auto b) {  return d; };
+  T t3 = [this](auto a) {
+          return [=](auto b) {
+            return x;
+         };
+  };
+  T t4 = [=](auto a) {
+          return [=](auto b) {
+            return x;
+         };
+  };
+  T t5 = [](auto a) {
+          return [=](auto b) {
+            return x;  //expected-error{{'this'}}
+         };
+  };
+};
+
+template<class T> double YThisCapture<T>::d = 3.14;
+
+
+}
+
+
+#ifdef DELAYED_TEMPLATE_PARSING
+template<class T> void foo_no_error(T t) { 
+  auto L = []()  
+    { return t; }; 
+}
+template<class T> void foo(T t) { //expected-note 2{{declared here}}
+  auto L = []()  //expected-note 2{{begins here}}
+    { return t; }; //expected-error 2{{cannot be implicitly captured}}
+}
+template void foo(int); //expected-note{{in instantiation of}}
+
+#else
+
+template<class T> void foo(T t) { //expected-note{{declared here}}
+  auto L = []()  //expected-note{{begins here}}
+    { return t; }; //expected-error{{cannot be implicitly captured}}
+}
+
+#endif
+}
+
+namespace no_this_capture_for_static {
+
+struct X {
+  static void f(double) { }
+  
+  int g() {
+    auto lam = [=](auto a) { f(a); }; 
+    lam(0); // ok.
+    ASSERT_NO_CAPTURES(lam);
+    return 0;
+  }
+};
+
+int run = X{}.g();
+}
+
+namespace this_capture_for_non_static {
+
+struct X {
+  void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { f(a); }; 
+    L(0); 
+    auto L2 = [](auto a) { f(a); }; //expected-error {{cannot be implicitly captured}}
+    return 0;
+  }
+};
+
+int run = X{}.g();
+}
+
+namespace this_captures_with_num_args_disambiguation {
+
+struct X {
+  void f(int) { }
+  static void f(double, int i) { }
+  int g() {
+    auto lam = [](auto a) { f(a, a); }; 
+    lam(0);
+    return 0;
+  }
+};
+
+int run = X{}.g();
+}
+namespace enclosing_function_is_template_this_capture {
+// Only error if the instantiation tries to use the member function.
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  template<class T>
+  int g(T t) {
+    auto L = [](auto a) { f(a); }; //expected-error{{'this'}} 
+    L(t); // expected-note{{in instantiation of}}
+    return 0;
+  }
+};
+
+int run = X{}.g(0.0); // OK.
+int run2 = X{}.g(0);  // expected-note{{in instantiation of}}
+
+
+}
+
+namespace enclosing_function_is_template_this_capture_2 {
+// This should error, even if not instantiated, since
+// this would need to be captured.
+struct X {
+  void f(int) { }
+  template<class T>
+  int g(T t) {
+    auto L = [](auto a) { f(a); }; //expected-error{{'this'}} 
+    L(t); 
+    return 0;
+  }
+};
+
+}
+
+
+namespace enclosing_function_is_template_this_capture_3 {
+// This should not error, this does not need to be captured.
+struct X {
+  static void f(int) { }
+  template<class T>
+  int g(T t) {
+    auto L = [](auto a) { f(a); };  
+    L(t); 
+    return 0;
+  }
+};
+
+int run = X{}.g(0.0); // OK.
+int run2 = X{}.g(0);  // OK.
+
+}
+
+namespace nested_this_capture_1 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [this]() {
+        return [=](auto b) {
+          f(b); 
+        };
+      };
+    };
+    auto M = L(0);
+    auto N = M();
+    N(5);    
+    return 0;
+  }
+};
+
+int run = X{}.g();
+
+}
+
+
+namespace nested_this_capture_2 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [&]() {
+        return [=](auto b) {
+          f(b);  
+        };
+      };
+    };
+    auto M = L(0);
+    auto N = M();
+    N(5);   
+    N(3.14);    
+    return 0;
+  }
+};
+
+int run = X{}.g();
+
+}
+
+namespace nested_this_capture_3_1 {
+struct X {
+  template<class T>
+  void f(int, T t) { }
+  template<class T>
+  static void f(double, T t) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [&](auto c) {
+        return [=](auto b) {
+          f(b, c); 
+        };
+      };
+    };
+    auto M = L(0);
+    auto N = M('a');
+    N(5); 
+    N(3.14);    
+    return 0;
+  }
+};
+
+int run = X{}.g();
+
+}
+
+
+namespace nested_this_capture_3_2 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [=](auto a) { 
+      return [](int i) {
+        return [=](auto b) {
+          f(b); //expected-error {{'this' cannot}}
+          int x = i;
+        };
+      };
+    };
+    auto M = L(0.0); 
+    auto N = M(3);
+    N(5); //expected-note {{in instantiation of}}
+    N(3.14); // OK.    
+    return 0;
+  }
+};
+
+int run = X{}.g();
+
+}
+
+namespace nested_this_capture_4 {
+struct X {
+  void f(int) { }
+  static void f(double) { }
+  
+  int g() {
+    auto L = [](auto a) { 
+      return [=](auto i) {
+        return [=](auto b) {
+          f(b); //expected-error {{'this' cannot}}
+          int x = i;
+        };
+      };
+    };
+    auto M = L(0.0); 
+    auto N = M(3);
+    N(5); //expected-note {{in instantiation of}}
+    N(3.14); // OK.    
+    return 0;
+  }
+};
+
+int run = X{}.g();
+
+}
+namespace capture_enclosing_function_parameters {
+
+
+inline auto foo(int x) {
+  int i = 10;
+  auto lambda = [=](auto z) { return x + z; };
+  return lambda;
+}
+
+int foo2() {
+  auto L = foo(3);
+  L(4);
+  L('a');
+  L(3.14);
+  return 0;
+}
+
+inline auto foo3(int x) {
+  int local = 1;
+  auto L = [=](auto a) {
+        int i = a[local];    
+        return  [=](auto b) mutable {
+          auto n = b;
+          return [&, n](auto c) mutable {
+            ++local;
+            return ++x;
+          };
+        };
+  };
+  auto M = L("foo-abc");
+  auto N = M("foo-def");
+  auto O = N("foo-ghi");
+  
+  return L;
+}
+
+int main() {
+  auto L3 = foo3(3);
+  auto M3 = L3("L3-1");
+  auto N3 = M3("M3-1");
+  auto O3 = N3("N3-1");
+  N3("N3-2");
+  M3("M3-2");
+  M3("M3-3");
+  L3("L3-2");
+}
+} // end ns
+
+namespace capture_arrays {
+
+inline int sum_array(int n) {
+  int array2[5] = { 1, 2, 3, 4, 5};
+  
+  auto L = [=](auto N) -> int {  
+    int sum = 0;
+    int array[5] = { 1, 2, 3, 4, 5 };
+    sum += array2[sum];
+    sum += array2[N];    
+    return 0;
+  };
+  L(2);
+  return L(n);
+}
+}
+
+namespace capture_non_odr_used_variable_because_named_in_instantiation_dependent_expressions {
+
+// even though 'x' is not odr-used, it should be captured.
+
+int test() {
+  const int x = 10;
+  auto L = [=](auto a) {
+    (void) +x + a;
+  };
+  ASSERT_CLOSURE_SIZE_EXACT(L, sizeof(x));
+}
+
+} //end ns
+#ifdef MS_EXTENSIONS
+namespace explicit_spec {
+template<class R> struct X {
+  template<class T> int foo(T t) {
+    auto L = [](auto a) { return a; };
+    L(&t);
+    return 0;
+  }
+  
+  template<> int foo<char>(char c) { //expected-warning{{explicit specialization}}
+    const int x = 10;
+    auto LC = [](auto a) { return a; };
+    R r;
+    LC(&r);
+    auto L = [=](auto a) {
+      return [=](auto b) {
+        int d[sizeof(a)];
+        f(x, d);
+      };
+    };
+    auto M = L(1);
+    
+    ASSERT_NO_CAPTURES(M);
+    return 0;
+  }
+  
+}; 
+
+int run_char = X<int>{}.foo('a');
+int run_int = X<double>{}.foo(4);
+}
+
+#endif // MS_EXTENSIONS
+