48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* Test for constant expressions: GNU extensions. */
|
|
/* Origin: Joseph Myers <joseph@codesourcery.com> */
|
|
/* { dg-do compile } */
|
|
/* { dg-options "-std=gnu89" } */
|
|
|
|
int n;
|
|
|
|
void
|
|
f (void)
|
|
{
|
|
int i = 0;
|
|
int a[n];
|
|
enum e1 {
|
|
/* Integer constant expressions may not contain statement
|
|
expressions (not a permitted operand). */
|
|
E1 = (1 ? 0 : ({ 0; })), /* { dg-error "constant" } */
|
|
/* Real and imaginary parts act like other arithmetic
|
|
operators. */
|
|
E2 = __real__ (1 ? 0 : i++), /* { dg-error "constant" } */
|
|
E3 = __real__ 0,
|
|
E4 = __imag__ (1 ? 0 : i++), /* { dg-error "constant" } */
|
|
E5 = __imag__ 0,
|
|
/* __alignof__ always constant. */
|
|
E6 = __alignof__ (int[n]),
|
|
E7 = __alignof__ (a),
|
|
/* __extension__ ignored for constant expression purposes. */
|
|
E8 = __extension__ (1 ? 0 : i++), /* { dg-error "constant" } */
|
|
E9 = __extension__ 0,
|
|
/* Conditional expressions with omitted arguments act like the
|
|
standard type. */
|
|
E10 = (1 ? : i++), /* { dg-error "constant" } */
|
|
E11 = (1 ? : 0)
|
|
};
|
|
enum e2 {
|
|
/* Complex integer constants may be cast directly to integer
|
|
types, but not after further arithmetic on them. */
|
|
F1 = (int) (_Complex int) 2i, /* { dg-error "constant" } */
|
|
F2 = (int) +2i, /* { dg-error "constant" } */
|
|
F3 = (int) (1 + 2i), /* { dg-error "constant" } */
|
|
F4 = (int) 2i
|
|
};
|
|
static double dr = __real__ (1.0 + 2.0i);
|
|
static double di = __imag__ (1.0 + 2.0i);
|
|
/* Statement expressions allowed in unevaluated subexpressions in
|
|
initializers in gnu99 but not gnu89. */
|
|
static int j = (1 ? 0 : ({ 0; })); /* { dg-warning "constant expression" } */
|
|
}
|