inline.c revision 11b46a0a49075f338eb4849c2b7d680945be9250 
1// RUN: %clang_cc1 -fsyntax-only -verify %s
2
3#if defined(INCLUDE)
4// -------
5// This section acts like a header file.
6// -------
7
8// Check the use of static variables in non-static inline functions.
9static int staticVar; // expected-note + {{'staticVar' declared here}}
10static int staticFunction(); // expected-note + {{'staticFunction' declared here}}
11
12inline int useStatic () { // expected-note 2 {{use 'static' to give inline function 'useStatic' internal linkage}}
13  staticFunction(); // expected-warning{{function 'staticFunction' has internal linkage but is used in an inline function with external linkage}}
14  return staticVar; // expected-warning{{variable 'staticVar' has internal linkage but is used in an inline function with external linkage}}
15}
16
17extern inline int useStaticFromExtern () { // no suggestions
18  staticFunction(); // expected-warning{{function 'staticFunction' has internal linkage but is used in an inline function with external linkage}}
19  return staticVar; // expected-warning{{variable 'staticVar' has internal linkage but is used in an inline function with external linkage}}
20}
21
22static inline int useStaticFromStatic () {
23  staticFunction(); // no-warning
24  return staticVar; // no-warning
25}
26
27#else
28// -------
29// This is the main source file.
30// -------
31
32#define INCLUDE
33#include "inline.c"
34
35// Check that we don't allow illegal uses of inline
36inline int a; // expected-error{{'inline' can only appear on functions}}
37typedef inline int b; // expected-error{{'inline' can only appear on functions}}
38int d(inline int a); // expected-error{{'inline' can only appear on functions}}
39
40// Check that the warnings from the "header file" aren't on by default in
41// the main source file.
42
43inline int useStaticMain () {
44  staticFunction(); // no-warning
45  return staticVar; // no-warning
46}
47
48// Check that the warnings show up when explicitly requested.
49
50#pragma clang diagnostic push
51#pragma clang diagnostic warning "-Winternal-linkage-in-inline"
52
53inline int useStaticAgain () { // expected-note 2 {{use 'static' to give inline function 'useStaticAgain' internal linkage}}
54  staticFunction(); // expected-warning{{function 'staticFunction' has internal linkage but is used in an inline function with external linkage}}
55  return staticVar; // expected-warning{{variable 'staticVar' has internal linkage but is used in an inline function with external linkage}}
56}
57
58#pragma clang diagnostic pop
59
60#endif
61
62
63