wswitch.c

来自「this is a gcc file, you can download it 」· C语言 代码 · 共 64 行

/* PR c/4475, PR c++/3780 */
/* { dg-do compile } */
/* { dg-options "-Wswitch" } */

enum e { e1, e2 };

int
foo (int i, int j, enum e ei, enum e ej, enum e ek, enum e el,
     enum e em, enum e en, enum e eo, enum e ep)
{
  switch (i)
    {
    case 1: return 1;
    case 2: return 2;
    }
  switch (j)
    {
    case 3: return 4;
    case 4: return 3;
    default: break;
    }
  switch (ei)
    { /* { dg-warning "enumeration value `e1' not handled in switch" "enum e1" } */
    } /* { dg-warning "enumeration value `e2' not handled in switch" "enum e2" { target *-*-* } 23 } */
  switch (ej)
    {
    default: break;
    }
  switch (ek)
    {
    case e1: return 1;
    } /* { dg-warning "enumeration value `e2' not handled in switch" "enum e2" } */
  switch (el)
    {
    case e1: return 1;
    default: break;
    }
  switch (em)
    {
    case e1: return 1;
    case e2: return 2;
    }
  switch (en)
    {
    case e1: return 1;
    case e2: return 2;
    default: break;
    }
  switch (eo)
    {
    case e1: return 1;
    case e2: return 2;
    case 3: return 3;
    } /* { dg-warning "case value `3' not in enumerated type `e'" "excess 3" } */
  switch (ep)
    {
    case e1: return 1;
    case e2: return 2;
    case 3: return 3;
    default: break;
    } /* Since there is a default, no warning about ``case 3'' */
  return 0;
}