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/* { dg-do compile } */
/* { dg-options "-fpermissive" } */
/* Check compatibility of array declarations. */
/* Incomplete decl matches. */
extern char arr0[];
char arr0[1];
/* Two integral expressions must be the same. Note that 0 is
a gcc extension, but it should work like any other constant. */
extern char arr1[1];
char arr1[1];
extern char arr2[0];
char arr2[0];
extern char arr3[0]; /* { dg-message "note: previous declaration" } */
char arr3[1]; /* { dg-error "conflicting types" } */
/* Variable size matches. */
void func(int n, int m)
{
/* The next two are from the example in c99 6.7.5.2/9. */
{
/* Invalid: not compatible because 4 != 6. */
int a[n][6][m];
int (*p)[4][n+1];
p = a; /* { dg-warning "incompatible" } */
}
{
/* Compatible, but defined behavior only if n == 6 and m == n+1. */
int c[n][n][6][m];
int (*r)[n][n][n+1];
r = c;
}
{
/* Compatible, but undefined behavior; (2, 2) is not a constant
expression, and thus A is a VLA. */
int a[6][(2, 2)];
int (*p)[3];
p = a; /* { dg-bogus "incompatible" "bad vla handling" } */
}
}
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