clang/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
  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'}}
 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