1 // RUN: %clang_cc1 -fsyntax-only -verify %s 2 3 // C++11 [basic.link]p6: 4 // The name of a function declared in block scope and the name 5 // of a variable declared by a block scope extern declaration 6 // have linkage. If there is a visible declaration of an entity 7 // with linkage having the same name and type, ignoring entities 8 // declared outside the innermost enclosing namespace scope, the 9 // block scope declaration declares that same entity and 10 // receives the linkage of the previous declaration. 11 12 // rdar://13535367 13 namespace test0 { 14 extern "C" int test0_array[]; declare()15 void declare() { extern int test0_array[100]; } 16 extern "C" int test0_array[]; 17 int value = sizeof(test0_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} 18 } 19 20 namespace test1 { 21 extern "C" int test1_array[]; test()22 void test() { 23 { extern int test1_array[100]; } 24 extern int test1_array[]; 25 int x = sizeof(test1_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} 26 } 27 } 28 29 namespace test2 { declare()30 void declare() { extern int test2_array[100]; } 31 extern int test2_array[]; 32 int value = sizeof(test2_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} 33 } 34 35 namespace test3 { test()36 void test() { 37 { extern int test3_array[100]; } 38 extern int test3_array[]; 39 int x = sizeof(test3_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}} 40 } 41 } 42 43 44