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111
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1 /* Test for constant expressions: GNU extensions. */
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2 /* Origin: Joseph Myers <joseph@codesourcery.com> */
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3 /* { dg-do compile } */
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4 /* { dg-options "-std=gnu90 -pedantic-errors" } */
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5
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6 int n;
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7
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8 void
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9 f (void)
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10 {
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11 int i = 0;
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12 int a[n]; /* { dg-error "ISO C90 forbids variable length array" } */
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13 enum e1 {
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14 /* Integer constant expressions may not contain statement
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15 expressions (not a permitted operand). */
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16 E1 = (1 ? 0 : ({ 0; })), /* { dg-error "constant expression" } */
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17 /* { dg-error "ISO C forbids braced-groups" "ISO" { target *-*-* } .-1 } */
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18 /* Real and imaginary parts act like other arithmetic
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19 operators. */
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20 E2 = __real__ (1 ? 0 : i++), /* { dg-error "constant expression" } */
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21 E3 = __real__ 0,
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22 E4 = __imag__ (1 ? 0 : i++), /* { dg-error "constant" } */
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23 E5 = __imag__ 0,
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24 /* __alignof__ always constant. */
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25 E6 = __alignof__ (int[n]), /* { dg-error "ISO C90 forbids variable length array" } */
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26 E7 = __alignof__ (a),
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27 /* __extension__ ignored for constant expression purposes. */
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28 E8 = __extension__ (1 ? 0 : i++), /* { dg-error "constant expression" } */
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29 E9 = __extension__ 0,
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30 /* Conditional expressions with omitted arguments act like the
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31 standard type. */
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32 E10 = (1 ? : i++), /* { dg-error "constant expression" } */
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33 /* { dg-error "ISO C forbids omitting" "ISO" { target *-*-* } .-1 } */
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34 E11 = (1 ? : 0) /* { dg-error "ISO C forbids omitting" } */
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35 };
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36 enum e2 {
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37 /* Complex integer constants may be cast directly to integer
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38 types, but not after further arithmetic on them. */
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39 F1 = (int) (_Complex int) 2i, /* { dg-error "constant expression" } */
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40 /* { dg-error "complex" "complex" { target *-*-* } .-1 } */
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41 /* { dg-error "imaginary" "imaginary" { target *-*-* } .-2 } */
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42 F2 = (int) +2i, /* { dg-error "constant expression" } */
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43 /* { dg-error "imaginary" "ISO" { target *-*-* } .-1 } */
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44 F3 = (int) (1 + 2i), /* { dg-error "constant expression" } */
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45 /* { dg-error "imaginary" "ISO" { target *-*-* } .-1 } */
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46 F4 = (int) 2i /* { dg-error "imaginary" } */
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47 };
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48 static double dr = __real__ (1.0 + 2.0i);
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49 /* { dg-error "imaginary" "ISO" { target *-*-* } .-1 } */
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50 static double di = __imag__ (1.0 + 2.0i);
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51 /* { dg-error "imaginary" "ISO" { target *-*-* } .-1 } */
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52 /* Statement expressions allowed in unevaluated subexpressions in
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53 initializers in gnu99 but not gnu89. */
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54 static int j = (1 ? 0 : ({ 0; })); /* { dg-error "constant expression" } */
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55 /* { dg-error "braced" "ISO" { target *-*-* } .-1 } */
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56 }
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