clang/test/Sema/cast.c

   1 // RUN: %clang_cc1 -fsyntax-only -triple x86_64-unknown-unknown %s -verify
   2
   3 typedef struct { unsigned long bits[(((1) + (64) - 1) / (64))]; } cpumask_t;
   4 cpumask_t x;
   5 void foo(void) {
   6   (void)x;
   7 }
   8 void bar(void) {
   9   char* a;
  10   double b;
  11   b = (double)a; // expected-error {{pointer cannot be cast to type}}
  12   a = (char*)b; // expected-error {{cannot be cast to a pointer type}}
  13 }
  14
  15 long bar1(long *next) {
  16         return (long)(*next)++;
  17 }
  18
  19 typedef _Bool Bool;
  20 typedef int Int;
  21 typedef long Long;
  22 typedef float Float;
  23 typedef double Double;
  24 typedef _Complex int CInt;
  25 typedef _Complex long CLong;
  26 typedef _Complex float CFloat;
  27 typedef _Complex double CDouble;
  28 typedef void *VoidPtr;
  29 typedef char *CharPtr;
  30
  31 void testBool(Bool v) {
  32   (void) (Bool) v;
  33   (void) (Int) v;
  34   (void) (Long) v;
  35   (void) (Float) v;
  36   (void) (Double) v;
  37   (void) (CInt) v;
  38   (void) (CLong) v;
  39   (void) (CFloat) v;
  40   (void) (CDouble) v;
  41   (void) (VoidPtr) v;
  42   (void) (CharPtr) v;
  43 }
  44
  45 void testInt(Int v) {
  46   (void) (Bool) v;
  47   (void) (Int) v;
  48   (void) (Long) v;
  49   (void) (Float) v;
  50   (void) (Double) v;
  51   (void) (CInt) v;
  52   (void) (CLong) v;
  53   (void) (CFloat) v;
  54   (void) (CDouble) v;
  55   (void) (VoidPtr) v; // expected-warning{{cast to 'VoidPtr' (aka 'void *') from smaller integer type 'Int' (aka 'int')}}
  56   (void) (CharPtr) v; // expected-warning{{cast to 'CharPtr' (aka 'char *') from smaller integer type 'Int' (aka 'int')}}
  57
  58   // Test that casts to void* can be controlled separately
  59   // from other -Wint-to-pointer-cast warnings.
  60 #pragma clang diagnostic push
  61 #pragma clang diagnostic ignored "-Wint-to-void-pointer-cast"
  62   (void) (VoidPtr) v; // no-warning
  63   (void) (CharPtr) v; // expected-warning{{cast to 'CharPtr' (aka 'char *') from smaller integer type 'Int' (aka 'int')}}
  64 #pragma clang diagnostic pop
  65 }
  66
  67 void testLong(Long v) {
  68   (void) (Bool) v;
  69   (void) (Int) v;
  70   (void) (Long) v;
  71   (void) (Float) v;
  72   (void) (Double) v;
  73   (void) (CInt) v;
  74   (void) (CLong) v;
  75   (void) (CFloat) v;
  76   (void) (CDouble) v;
  77   (void) (VoidPtr) v;
  78   (void) (CharPtr) v;
  79 }
  80
  81 void testFloat(Float v) {
  82   (void) (Bool) v;
  83   (void) (Int) v;
  84   (void) (Long) v;
  85   (void) (Float) v;
  86   (void) (Double) v;
  87   (void) (CInt) v;
  88   (void) (CLong) v;
  89   (void) (CFloat) v;
  90   (void) (CDouble) v;
  91 }
  92
  93 void testDouble(Double v) {
  94   (void) (Bool) v;
  95   (void) (Int) v;
  96   (void) (Long) v;
  97   (void) (Float) v;
  98   (void) (Double) v;
  99   (void) (CInt) v;
 100   (void) (CLong) v;
 101   (void) (CFloat) v;
 102   (void) (CDouble) v;
 103 }
 104
 105 void testCI(CInt v) {
 106   (void) (Bool) v;
 107   (void) (Int) v;
 108   (void) (Long) v;
 109   (void) (Float) v;
 110   (void) (Double) v;
 111   (void) (CInt) v;
 112   (void) (CLong) v;
 113   (void) (CFloat) v;
 114   (void) (CDouble) v;
 115 }
 116
 117 void testCLong(CLong v) {
 118   (void) (Bool) v;
 119   (void) (Int) v;
 120   (void) (Long) v;
 121   (void) (Float) v;
 122   (void) (Double) v;
 123   (void) (CInt) v;
 124   (void) (CLong) v;
 125   (void) (CFloat) v;
 126   (void) (CDouble) v;
 127 }
 128
 129 void testCFloat(CFloat v) {
 130   (void) (Bool) v;
 131   (void) (Int) v;
 132   (void) (Long) v;
 133   (void) (Float) v;
 134   (void) (Double) v;
 135   (void) (CInt) v;
 136   (void) (CLong) v;
 137   (void) (CFloat) v;
 138   (void) (CDouble) v;
 139 }
 140
 141 void testCDouble(CDouble v) {
 142   (void) (Bool) v;
 143   (void) (Int) v;
 144   (void) (Long) v;
 145   (void) (Float) v;
 146   (void) (Double) v;
 147   (void) (CInt) v;
 148   (void) (CLong) v;
 149   (void) (CFloat) v;
 150   (void) (CDouble) v;
 151 }
 152
 153 void testVoidPtr(VoidPtr v) {
 154   (void)(Bool) v;
 155   (void) (Int) v; // expected-warning{{cast to smaller integer type 'Int' (aka 'int') from 'VoidPtr' (aka 'void *')}}
 156   (void) (Long) v;
 157   (void) (VoidPtr) v;
 158   (void) (CharPtr) v;
 159   // Test that casts to void* can be controlled separately
 160   // from other -Wpointer-to-int-cast warnings.
 161 #pragma clang diagnostic push
 162 #pragma clang diagnostic ignored "-Wvoid-pointer-to-int-cast"
 163   (void)(Int) v; // no-warning
 164 #pragma clang diagnostic pop
 165 }
 166
 167 void testCharPtr(CharPtr v) {
 168   (void)(Bool) v;
 169   (void) (Int) v; // expected-warning{{cast to smaller integer type 'Int' (aka 'int') from 'CharPtr' (aka 'char *')}}
 170   (void) (Long) v;
 171   (void) (VoidPtr) v;
 172   (void) (CharPtr) v;
 173   // Test that casts to void* can be controlled separately
 174   // from other -Wpointer-to-int-cast warnings.
 175 #pragma clang diagnostic push
 176 #pragma clang diagnostic ignored "-Wvoid-pointer-to-int-cast"
 177   (void)(Int) v; // expected-warning{{cast to smaller integer type 'Int' (aka 'int') from 'CharPtr' (aka 'char *')}}
 178 #pragma clang diagnostic pop
 179 }
 180
 181 typedef enum { x_a, x_b } X;
 182 void *intToPointerCast2(X x) {
 183   return (void*)x;
 184 }
 185
 186 void *intToPointerCast3(void) {
 187   return (void*)(1 + 3);
 188 }
 189
 190 void voidPointerToEnumCast(VoidPtr v) {
 191   (void)(X) v; // expected-warning{{cast to smaller integer type 'X' from 'VoidPtr' (aka 'void *')}}
 192   // Test that casts to void* can be controlled separately
 193   // from other -Wpointer-to-enum-cast warnings.
 194 #pragma clang diagnostic push
 195 #pragma clang diagnostic ignored "-Wvoid-pointer-to-enum-cast"
 196   (void)(X) v; // no-warning
 197 #pragma clang diagnostic pop
 198 }
 199
 200 void pointerToEnumCast(CharPtr v) {
 201   (void)(X) v; // expected-warning{{cast to smaller integer type 'X' from 'CharPtr' (aka 'char *')}}
 202   // Test that casts to void* can be controlled separately
 203   // from other -Wpointer-to-enum-cast warnings.
 204 #pragma clang diagnostic push
 205 #pragma clang diagnostic ignored "-Wvoid-pointer-to-enum-cast"
 206   (void)(X) v; // expected-warning{{cast to smaller integer type 'X' from 'CharPtr' (aka 'char *')}}
 207 #pragma clang diagnostic pop
 208 }