Viewing file:  pointer-array-quals-2.c (6.06 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-pedantic-errors" } */
/* Origin: Martin Uecker <uecker@eecs.berkeley.edu> */
void tvoid(void* x);
void transpose0(double* out, const double* in) { }
void transpose1(double out[2][2], const double in[2][2]) { }
void transpose2(double out[2][2][2], const double in[2][2][2]) { }
// return
int (*x2(const int x[3][3]))[3] { return x; } /* { dg-error "pointers to arrays with different qualifiers|return discards" } */
const int (*x3(int x[3][3]))[3] { return x; } /* { dg-error "pointers to arrays with different qualifiers" } */
void test(void)
{
double x0[2];
double y0[2];
const double z0[4];
double x1[2][2];
double y1[2][2];
double o1[2][3];
const double z1[2][2];
double x2[2][2][2];
double y2[2][2][2];
double o2[2][2][3];
const double z2[2][2][2];
// void pointers
tvoid(z0); /* { dg-error "passing argument 1 of 'tvoid' discards 'const' qualifier from pointer target type" } */
tvoid(z1); /* { dg-warning "passing argument 1 of 'tvoid' discards 'const' qualifier from pointer target type" } */
tvoid(z2); /* { dg-warning "passing argument 1 of 'tvoid' discards 'const' qualifier from pointer target type" } */
void* p;
const void* pc;
p = x0;
p = x1;
p = x2;
p = z0; /* { dg-error "assignment discards 'const' qualifier from pointer target type" } */
p = z1; /* { dg-warning "assignment discards 'const' qualifier from pointer target type" } */
p = z2; /* { dg-warning "assignment discards 'const' qualifier from pointer target type" } */
pc = x0;
pc = x1;
pc = x2;
pc = z0;
pc = z1;
pc = z2;
transpose0(pc, p); /* { dg-error "passing argument 1 of 'transpose0' discards 'const' qualifier from pointer target type" } */
transpose1(pc, p); /* { dg-error "passing argument 1 of 'transpose1' discards 'const' qualifier from pointer target type" } */
transpose2(pc, p); /* { dg-error "passing argument 1 of 'transpose2' discards 'const' qualifier from pointer target type" } */
transpose0(p, pc);
transpose1(p, pc); /* { dg-error "passing argument 2 of 'transpose1' discards 'const' qualifier from pointer target type" } */
transpose2(p, pc); /* { dg-error "passing argument 2 of 'transpose2' discards 'const' qualifier from pointer target type" } */
// passing as arguments
transpose0(y0, x0);
transpose1(y1, o1); /* { dg-error "passing argument 2 of 'transpose1' from incompatible pointer type" } */
transpose1(y1, x1); /* { dg-error "pointers to arrays with different qualifiers" } */
transpose2(y2, o2); /* { dg-error "passing argument 2 of 'transpose2' from incompatible pointer type" } */
transpose2(y2, x2); /* { dg-error "pointers to arrays with different qualifiers" } */
// initialization
const double (*x0p) = x0;
const double (*x1p)[2] = x1; /* { dg-error "pointers to arrays with different qualifiers" } */
const double (*x2p)[2][2] = x2; /* { dg-error "pointers to arrays with different qualifiers" } */
double (*v0p) = z0; /* { dg-error "initialization discards 'const' qualifier from pointer target type" } */
double (*v1p)[2] = z1; /* { dg-error "pointers to arrays with different qualifiers|initialization discards" } */
double (*v2p)[2][2] = z2; /* { dg-error "pointers to arrays with different qualifiers|initialization discards" } */
// assignment
x0p = x0;
x1p = x1; /* { dg-error "pointers to arrays with different qualifiers" } */
x2p = x2; /* { dg-error "pointers to arrays with different qualifiers" } */
// subtraction
&(x0[1]) - &(z0[0]);
&(x1[1]) - &(z1[0]); /* { dg-error "pointers to arrays with different qualifiers" } */
&(x2[1]) - &(z2[0]); /* { dg-error "pointers to arrays with different qualifiers" } */
// comparison
x0 == z0;
x1 == z1; /* { dg-error "pointers to arrays with different qualifiers" } */
x2 == z2; /* { dg-error "pointers to arrays with different qualifiers" } */
x0 < z0;
x1 < z1; /* { dg-error "pointers to arrays with different qualifiers" } */
x2 < z2; /* { dg-error "pointers to arrays with different qualifiers" } */
x0 > z0;
x1 > z1; /* { dg-error "pointers to arrays with different qualifiers" } */
x2 > z2; /* { dg-error "pointers to arrays with different qualifiers" } */
// conditional expressions
(void)(1 ? x0 : z0);
(void)(1 ? x1 : z1); /* { dg-error "pointers to arrays with different qualifiers" } */
(void)(1 ? x2 : z2); /* { dg-error "pointers to arrays with different qualifiers" } */
(void)(1 ? x0 : x1); /* { dg-error "pointer type mismatch in conditional expression" } */
(void)(1 ? x1 : x2); /* { dg-error "pointer type mismatch in conditional expression" } */
(void)(1 ? x2 : x0); /* { dg-error "pointer type mismatch in conditional expression" } */
v0p = (1 ? z0 : v0p); /* { dg-error "assignment discards 'const' qualifier from pointer target type" } */
v1p = (1 ? z1 : v1p); /* { dg-error "pointers to arrays with different qualifiers|assignment discards" } */
v2p = (1 ? z2 : v2p); /* { dg-error "pointers to arrays with different qualifiers|assignment discards" } */
v0p = (1 ? x0 : x0p); /* { dg-error "assignment discards 'const' qualifier from pointer target type" } */
v1p = (1 ? x1 : x1p); /* { dg-error "pointers to arrays with different qualifiers|assignment discards" } */
v2p = (1 ? x2 : x2p); /* { dg-error "pointers to arrays with different qualifiers|assignment discards" } */
(1 ? x0 : z0)[0] = 1; /* { dg-error "assignment of read-only location" } */
(1 ? x1 : z1)[0][0] = 1; /* { dg-error "assignment of read-only location|pointers to arrays" } */
(1 ? x2 : z2)[0][0][0] = 1; /* { dg-error "assignment of read-only location|pointers to arrays" } */
v0p = (1 ? p : z0); /* { dg-error "assignment discards 'const' qualifier from pointer target type" } */
v1p = (1 ? p : z1); /* { dg-warning "pointer to array loses qualifier in conditional expression" } */
v2p = (1 ? p : z2); /* { dg-warning "pointer to array loses qualifier in conditional expression" } */
v0p = (1 ? pc : x0); /* { dg-error "assignment discards 'const' qualifier from pointer target type" } */
v1p = (1 ? pc : x1); /* { dg-error "assignment discards 'const' qualifier from pointer target type" } */
v2p = (1 ? pc : x2); /* { dg-error "assignment discards 'const' qualifier from pointer target type" } */
}
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