1 // RUN: %clang_cc1 -ffreestanding -Eonly -verify %s
2 
3 // Try different path permutations of __has_include with existing file.
4 #if __has_include("stdint.h")
5 #else
6   #error "__has_include failed (1)."
7 #endif
8 
9 #if __has_include(<stdint.h>)
10 #else
11   #error "__has_include failed (2)."
12 #endif
13 
14 // Try unary expression.
15 #if !__has_include("stdint.h")
16   #error "__has_include failed (5)."
17 #endif
18 
19 // Try binary expression.
20 #if __has_include("stdint.h") && __has_include("stddef.h")
21 #else
22   #error "__has_include failed (6)."
23 #endif
24 
25 // Try non-existing file.
26 #if __has_include("blahblah.h")
27   #error "__has_include failed (7)."
28 #endif
29 
30 // Try defined.
31 #if !defined(__has_include)
32   #error "defined(__has_include) failed (8)."
33 #endif
34 
35 // Try different path permutations of __has_include_next with existing file.
36 #if __has_include_next("stddef.h") // expected-warning {{#include_next in primary source file}}
37 #else
38   #error "__has_include failed (1)."
39 #endif
40 
41 #if __has_include_next(<stddef.h>) // expected-warning {{#include_next in primary source file}}
42 #else
43   #error "__has_include failed (2)."
44 #endif
45 
46 // Try unary expression.
47 #if !__has_include_next("stdint.h") // expected-warning {{#include_next in primary source file}}
48   #error "__has_include_next failed (5)."
49 #endif
50 
51 // Try binary expression.
52 #if __has_include_next("stdint.h") && __has_include("stddef.h") // expected-warning {{#include_next in primary source file}}
53 #else
54   #error "__has_include_next failed (6)."
55 #endif
56 
57 // Try non-existing file.
58 #if __has_include_next("blahblah.h") // expected-warning {{#include_next in primary source file}}
59   #error "__has_include_next failed (7)."
60 #endif
61 
62 // Try defined.
63 #if !defined(__has_include_next)
64   #error "defined(__has_include_next) failed (8)."
65 #endif
66 
67 // Fun with macros
68 #define MACRO1 __has_include(<stdint.h>)
69 #define MACRO2 ("stdint.h")
70 #define MACRO3 ("blahblah.h")
71 #define MACRO4 blahblah.h>)
72 #define MACRO5 <stdint.h>
73 
74 #if !MACRO1
75   #error "__has_include with macro failed (1)."
76 #endif
77 
78 #if !__has_include MACRO2
79   #error "__has_include with macro failed (2)."
80 #endif
81 
82 #if __has_include MACRO3
83   #error "__has_include with macro failed (3)."
84 #endif
85 
86 #if __has_include(<MACRO4
87   #error "__has_include with macro failed (4)."
88 #endif
89 
90 #if !__has_include(MACRO5)
91   #error "__has_include with macro failed (2)."
92 #endif
93 
94 // Try as non-preprocessor directives
95 void foo( void ) {
96   __has_include_next("stdint.h")  // expected-warning {{#include_next in primary source file}} expected-error {{__has_include_next must be used within a preprocessing directive}}
97   __has_include("stdint.h")  // expected-error {{__has_include must be used within a preprocessing directive}}
98 }
99 
100 MACRO1  // expected-error {{__has_include must be used within a preprocessing directive}}
101 
102 #if 1
103 MACRO1  // expected-error {{__has_include must be used within a preprocessing directive}}
104 #endif
105 
106 #if 0
107 #elif 1
108 MACRO1  // expected-error {{__has_include must be used within a preprocessing directive}}
109 #endif
110 
111 #if 0
112 MACRO1  // This should be fine because it is never actually reached
113 #endif
114 
115 
116 // Try badly formed expressions.
117 // FIXME: We can recover better in almost all of these cases. (PR13335)
118 
119 // expected-error@+1 {{missing '(' after '__has_include'}}
120 #if __has_include "stdint.h")
121 #endif
122 
123 // expected-error@+1 {{expected "FILENAME" or <FILENAME>}} expected-error@+1 {{token is not a valid binary operator in a preprocessor subexpression}}
124 #if __has_include(stdint.h)
125 #endif
126 
127 // expected-error@+1 {{expected "FILENAME" or <FILENAME>}}
128 #if __has_include()
129 #endif
130 
131 // expected-error@+1 {{missing '(' after '__has_include'}}
132 #if __has_include)
133 #endif
134 
135 // expected-error@+1 {{missing '(' after '__has_include'}}
136 #if __has_include<stdint.h>)
137 #endif
138 
139 // expected-error@+1 {{expected "FILENAME" or <FILENAME>}} expected-warning@+1 {{missing terminating '"' character}}  expected-error@+1 {{invalid token at start of a preprocessor expression}}
140 #if __has_include("stdint.h)
141 #endif
142 
143 // expected-error@+1 {{expected "FILENAME" or <FILENAME>}} expected-warning@+1 {{missing terminating '"' character}} expected-error@+1 {{token is not a valid binary operator in a preprocessor subexpression}}
144 #if __has_include(stdint.h")
145 #endif
146 
147 // expected-error@+1 {{expected "FILENAME" or <FILENAME>}} expected-error@+1 {{token is not a valid binary operator in a preprocessor subexpression}}
148 #if __has_include(stdint.h>)
149 #endif
150 
151 // expected-error@+1 {{__has_include must be used within a preprocessing directive}}
152 __has_include
153 
154 // expected-error@+1 {{missing ')' after '__has_include'}} // expected-error@+1 {{expected value in expression}}  // expected-note@+1 {{to match this '('}}
155 #if __has_include("stdint.h"
156 #endif
157 
158 // expected-error@+1 {{expected "FILENAME" or <FILENAME>}} // expected-error@+1 {{expected value in expression}}
159 #if __has_include(
160 #endif
161 
162 // expected-error@+1 {{missing '(' after '__has_include'}} // expected-error@+1 {{expected value in expression}}
163 #if __has_include
164 #endif
165 
166 // expected-error@+1 {{missing ')' after '__has_include'}}  // expected-error@+1 {{expected value in expression}}  // expected-note@+1 {{to match this '('}}
167 #if __has_include(<stdint.h>
168 #endif
169 
170 // expected-error@+1 {{expected "FILENAME" or <FILENAME>}} // expected-error@+1 {{expected value in expression}}
171 #if __has_include(<stdint.h)
172 #endif
173 
174 #define HAS_INCLUDE(header) __has_include(header)
175 #if HAS_INCLUDE(<stdint.h>)
176 #else
177   #error "__has_include failed (9)."
178 #endif
179 
180 #if FOO
181 #elif __has_include(<foo>)
182 #endif
183 
184 // PR15539
185 #ifdef FOO
186 #elif __has_include(<foo>)
187 #endif
188