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class.c (is_really_empty_class): A zero-length array is empty.

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* class.c (is_really_empty_class): A zero-length array is empty.
	An unnamed bit-field doesn't make a class non-empty.

From-SVN: r234916
This commit is contained in:
Jason Merrill 2016-04-12 16:28:40 -04:00 • committed by Jason Merrill
parent 6512fa6dc0
commit 08d6d8bb00
2 changed files with 9 additions and 1 deletions
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5
gcc/cp/ChangeLog
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@ -1,3 +1,8 @@
2016-04-12 Jason Merrill <jason@redhat.com>
* class.c (is_really_empty_class): A zero-length array is empty.
An unnamed bit-field doesn't make a class non-empty.
2016-04-12 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/68722

5
gcc/cp/class.c
View file

@ -8406,12 +8406,15 @@ is_really_empty_class (tree type)
for (field = TYPE_FIELDS (type); field; field = DECL_CHAIN (field))
if (TREE_CODE (field) == FIELD_DECL
&& !DECL_ARTIFICIAL (field)
/* An unnamed bit-field is not a data member. */
&& (DECL_NAME (field) || !DECL_C_BIT_FIELD (field))
&& !is_really_empty_class (TREE_TYPE (field)))
return false;
return true;
}
else if (TREE_CODE (type) == ARRAY_TYPE)
return is_really_empty_class (TREE_TYPE (type));
return (integer_zerop (array_type_nelts_top (type))
|| is_really_empty_class (TREE_TYPE (type)));
return false;
}