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1 // RUN: rm -rf %t
2 // RUN: %clang_cc1 -x objective-c++ -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs %s -verify
3 
4 int &global(int);
5 int &global2(int);
6 
7 namespace N6 {
8   char &f(char);
9 }
10 
11 namespace N8 { }
12 
13 namespace LookupBeforeImport {
14   int &f(int);
15 }
testEarly()16 void testEarly() {
17   int &r = LookupBeforeImport::f(1);
18 }
19 
20 @import namespaces_left;
21 @import namespaces_right;
22 
test()23 void test() {
24   int &ir1 = N1::f(1);
25   int &ir2 = N2::f(1);
26   int &ir3 = N3::f(1);
27   int &ir4 = global(1);
28   int &ir5 = ::global2(1);
29   float &fr1 = N1::f(1.0f);
30   float &fr2 = N2::f(1.0f);
31   float &fr3 = global(1.0f);
32   float &fr4 = ::global2(1.0f);
33   float &fr5 = LookupBeforeImport::f(1.0f);
34   double &dr1 = N2::f(1.0);
35   double &dr2 = N3::f(1.0);
36   double &dr3 = global(1.0);
37   double &dr4 = ::global2(1.0);
38   double &dr5 = LookupBeforeImport::f(1.0);
39 
40   struct AddAndReexportBeforeImport::S s;
41   int k = AddAndReexportBeforeImport::S;
42 }
43 
44 // Test namespaces merged without a common first declaration.
45 namespace N5 {
46   char &f(char);
47 }
48 
49 namespace N10 {
50   int &f(int);
51 }
52 
testMerged()53 void testMerged() {
54   int &ir1 = N5::f(17);
55   int &ir2 = N6::f(17);
56   int &ir3 = N7::f(17);
57   double &fr1 = N5::f(1.0);
58   double &fr2 = N6::f(1.0);
59   double &fr3 = N7::f(1.0);
60   char &cr1 = N5::f('a');
61   char &cr2 = N6::f('b');
62 }
63 
64 // Test merging of declarations within namespaces that themselves were
65 // merged without a common first declaration.
testMergedMerged()66 void testMergedMerged() {
67   int &ir1 = N8::f(17);
68   int &ir2 = N9::f(17);
69   int &ir3 = N10::f(17);
70 }
71 
72 // Test merging when using anonymous namespaces, which does not
73 // actually perform any merging.
testAnonymousNotMerged()74 void testAnonymousNotMerged() {
75   N11::consumeFoo(N11::getFoo()); // expected-error{{cannot initialize a parameter of type 'N11::(anonymous namespace)::Foo *' with an rvalue of type 'N11::(anonymous namespace)::Foo *'}}
76   N12::consumeFoo(N12::getFoo()); // expected-error{{cannot initialize a parameter of type 'N12::(anonymous namespace)::Foo *' with an rvalue of type 'N12::(anonymous namespace)::Foo *'}}
77 }
78 
79 // expected-note@Inputs/namespaces-right.h:60 {{passing argument to parameter here}}
80 // expected-note@Inputs/namespaces-right.h:67 {{passing argument to parameter here}}
81 
82 // Test that bringing in one name from an overload set does not hide the rest.
testPartialImportOfOverloadSet()83 void testPartialImportOfOverloadSet() {
84   void (*p)() = N13::p;
85   p();
86   N13::f(0);
87 }
88