+2001-12-12 Jakub Jelinek <jakub@redhat.com>
+
+ * c-typeck.c (digest_init): Allow initializing
+ static storage duration objects with compound literals.
+ * doc/extend.texi (Compound literals): Document the extension.
+
2001-12-12 Richard Henderson <rth@redhat.com>
* emit-rtl.c (adjust_address_1): Always copy address to avoid
{
if (code == POINTER_TYPE)
inside_init = default_function_array_conversion (inside_init);
- else if (code == ARRAY_TYPE && TREE_CODE (inside_init) != STRING_CST
- && TREE_CODE (inside_init) != CONSTRUCTOR)
+
+ if (require_constant && !flag_isoc99
+ && TREE_CODE (inside_init) == COMPOUND_LITERAL_EXPR)
+ {
+ /* As an extension, allow initializing objects with static storage
+ duration with compound literals (which are then treated just as
+ the brace enclosed list they contain). */
+ tree decl = COMPOUND_LITERAL_EXPR_DECL (inside_init);
+ inside_init = DECL_INITIAL (decl);
+ }
+
+ if (code == ARRAY_TYPE && TREE_CODE (inside_init) != STRING_CST
+ && TREE_CODE (inside_init) != CONSTRUCTOR)
{
error_init ("array initialized from non-constant array expression");
return error_mark_node;
also allowed, but then the compound literal is equivalent
to a cast.
+As a GNU extension, GCC allows initialization of objects with static storage
+duration by compound literals (which is not possible in ISO C99, because
+the initializer is not a constant).
+It is handled as if the object was initialized only with the bracket
+enclosed list if compound literal's and object types match.
+The initializer list of the compound literal must be constant.
+If the object being initialized has array type of unknown size, the size is
+determined by compound literal's initializer list, not by the size of the
+compound literal.
+
+@example
+static struct foo x = (struct foo) @{1, 'a', 'b'@};
+static int y[] = (int []) @{1, 2, 3@};
+static int z[] = (int [3]) @{1@};
+@end example
+
+@noindent
+The above lines are equivalent to the following:
+@example
+static struct foo x = @{1, 'a', 'b'@};
+static int y[] = @{1, 2, 3@};
+static int z[] = @{1@};
+@end example
+
@node Designated Inits
@section Designated Initializers
@cindex initializers with labeled elements
+2001-12-12 Jakub Jelinek <jakub@redhat.com>
+
+ * gcc.dg/gnu89-init-1.c: New test.
+
2001-12-12 Nathan Sidwell <nathan@codesourcery.com>
* g++.old-deja/g++.brendan/crash56.C: Adjust implicit typename.
--- /dev/null
+/* Test for GNU extensions to compound literals */
+/* Origin: Jakub Jelinek <jakub@redhat.com> */
+/* { dg-do run } */
+/* { dg-options "-std=gnu89" } */
+
+extern void abort (void);
+extern void exit (int);
+
+struct A { int i; int j; int k[4]; };
+struct B { };
+
+/* As a GNU extension, we allow initialization of objects with static storage
+ duration by compound literals. It is handled as if the object
+ was initialized only with the bracket enclosed list if compound literal's
+ and object types match. If the object being initialized has array type
+ of unknown size, the size is determined by compound literal's initializer
+ list, not by size of the compound literal. */
+
+struct A a = (struct A) { .j = 6, .k[2] = 12 };
+struct B b = (struct B) { };
+int c[] = (int []) { [2] = 6, 7, 8 };
+int d[] = (int [3]) { 1 };
+
+int main (void)
+{
+ if (a.i || a.j != 6 || a.k[0] || a.k[1] || a.k[2] != 12 || a.k[3])
+ abort ();
+ if (c[0] || c[1] || c[2] != 6 || c[3] != 7 || c[4] != 8)
+ abort ();
+ if (sizeof (c) != 5 * sizeof (int))
+ abort ();
+ if (d[0] != 1)
+ abort ();
+ if (sizeof (d) != sizeof (int))
+ abort ();
+ exit (0);
+}