LANG.EXT.GNU : GNU拡張の使用

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CodeSonar^® 9.2p0

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LANG.EXT.GNU : GNU拡張の使用

要旨

プロパティ

例

#include <stddef.h>

typedef int myvector __attribute__ ((vector_size (16))); /* 'GNU Extension' warning issued here
                                                          * (vector type) */ 

struct S { int a; int b; };

double EXT_GNU(int a, int b, _Complex double comp){
    int i=3;
    int j,k;
    double d;
    _Complex double c;
    void * l;  

    switch (a){                            
      case 0 ... 3: break;                         /* 'GNU Extension' warning issued here
                                                    * (switch case range) */ 
          /* ... */};

    d = __real comp;                               /* 'GNU Extension' warning issued here
                                                    * (and also for __real__, __imag, __imag__, and ~) */ 
 
    __extension__ i++;                             /* 'GNU Extension' warning issued here
                                                    * (__extension__ keyword) */ 

    i = ({j=i; while (j<100) j+=(int)d; j; });     /* 'GNU Extension' warning issued here
                                                    * (statement expression) */ 

    l = &&label1;                                  /* 'GNU Extension' warning issued here
                                                    * (taking label address) */ 

    goto *l;                                       /* 'GNU Extension' warning issued here
                                                    * (computed goto) */ 
  label1 : i += a;
  label2 : i += b;
                   
    i += __builtin_offsetof(struct S, b);          /* 'GNU Extension' warning issued here
                                                    * (__builtin_offsetof()) */ 

    __builtin_types_compatible_p(int, short);      /* 'GNU Extension' warning issued here
                                                    * (__builtin_types_compatible_p()) */ 

    asm ("mov %1, %0" : "=r" (i) : "r" (j));       /* 'GNU Extension' warning issued here
                                                    * (extended asm) */
    return i;
}

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