/* Test for constant expressions: cases involving VLAs and typeof. */
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/* Test for constant expressions: cases involving VLAs and typeof. */
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/* Origin: Joseph Myers <joseph@codesourcery.com> */
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/* Origin: Joseph Myers <joseph@codesourcery.com> */
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/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-std=gnu99 -pedantic-errors" } */
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/* { dg-options "-std=gnu99 -pedantic-errors" } */
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/* It appears address constants may contain casts to variably modified
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/* It appears address constants may contain casts to variably modified
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types. Whether they should be permitted was discussed in
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types. Whether they should be permitted was discussed in
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<http://groups.google.com/group/comp.std.c/msg/923eee5ab690fd98>
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<http://groups.google.com/group/comp.std.c/msg/923eee5ab690fd98>
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<LV7g2Vy3ARF$Ew9Q@romana.davros.org>; since static pointers to VLAs
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<LV7g2Vy3ARF$Ew9Q@romana.davros.org>; since static pointers to VLAs
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are definitely permitted within functions and may be initialized
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are definitely permitted within functions and may be initialized
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and such initialization involves implicit conversion to a variably
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and such initialization involves implicit conversion to a variably
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modified type, allowing explicit casts seems appropriate. Thus,
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modified type, allowing explicit casts seems appropriate. Thus,
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GCC allows them as long as the "evaluated" size expressions do not
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GCC allows them as long as the "evaluated" size expressions do not
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contain the various operators not permitted to be evaluated in a
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contain the various operators not permitted to be evaluated in a
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constant expression, and as long as the result is genuinely
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constant expression, and as long as the result is genuinely
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constant (meaning that pointer arithmetic using the size of the VLA
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constant (meaning that pointer arithmetic using the size of the VLA
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is generally not permitted). */
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is generally not permitted). */
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static int sa[100];
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static int sa[100];
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int
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int
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f (int m, int n)
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f (int m, int n)
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{
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{
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static int (*a1)[n] = &sa;
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static int (*a1)[n] = &sa;
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static int (*a2)[n] = (__typeof__(int (*)[n]))sa;
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static int (*a2)[n] = (__typeof__(int (*)[n]))sa;
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static int (*a3)[n] = (__typeof__(int (*)[(int){m++}]))sa; /* { dg-error "constant" } */
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static int (*a3)[n] = (__typeof__(int (*)[(int){m++}]))sa; /* { dg-error "constant" } */
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static int (*a4)[n] = (__typeof__((int (*)[n])sa))sa;
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static int (*a4)[n] = (__typeof__((int (*)[n])sa))sa;
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static int (*a5)[n] = (__typeof__((int (*)[m++])sa))sa; /* { dg-error "constant" } */
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static int (*a5)[n] = (__typeof__((int (*)[m++])sa))sa; /* { dg-error "constant" } */
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static int (*a6)[n] = (__typeof__((int (*)[100])(int (*)[m++])sa))sa;
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static int (*a6)[n] = (__typeof__((int (*)[100])(int (*)[m++])sa))sa;
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static int (*a7)[n] = (__typeof__((int (*)[n])sa + m++))sa; /* { dg-error "constant" } */
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static int (*a7)[n] = (__typeof__((int (*)[n])sa + m++))sa; /* { dg-error "constant" } */
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return n;
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return n;
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}
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}
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