Clang Project

clang_source_code/test/Preprocessor/has_include.c
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
95void 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
100MACRO1  // expected-error {{'__has_include' must be used within a preprocessing directive}}
101
102#if 1
103MACRO1  // expected-error {{'__has_include' must be used within a preprocessing directive}}
104#endif
105
106#if 0
107#elif 1
108MACRO1  // expected-error {{'__has_include' must be used within a preprocessing directive}}
109#endif
110
111#if 0
112MACRO1  // 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'}}
167#if __has_include'x'
168#endif
169
170// expected-error@+1 {{expected "FILENAME" or <FILENAME>}}
171#if __has_include('x'
172#endif
173
174// expected-error@+1 {{expected "FILENAME" or <FILENAME}} expected-error@+1 {{expected end of line in preprocessor expression}}
175#if __has_include('x')
176#endif
177
178// expected-error@+1 {{missing ')' after '__has_include'}}  // expected-error@+1 {{expected value in expression}}  // expected-note@+1 {{to match this '('}}
179#if __has_include(<stdint.h>
180#endif
181
182// expected-error@+1 {{expected '>'}} expected-note@+1 {{to match this '<'}} // expected-error@+1 {{expected value in expression}}
183#if __has_include(<stdint.h)
184#endif
185
186#define HAS_INCLUDE(header) __has_include(header)
187#if HAS_INCLUDE(<stdint.h>)
188#else
189  #error "__has_include failed (9)."
190#endif
191
192#if FOO
193#elif __has_include(<foo>)
194#endif
195
196// PR15539
197#ifdef FOO
198#elif __has_include(<foo>)
199#endif
200
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