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| author | Lubos Lunak <l.lunak@suse.cz> | 2013-07-14 01:16:18 +0200 |
|---|---|---|
| committer | Jason Merrill <jason@gcc.gnu.org> | 2013-07-13 19:16:18 -0400 |
| commit | 2a99e5e633fb1faddeb8c8ce7b1429dedebb033b (patch) | |
| tree | 0170fc55d95b627aec9918256ba3cf861f269fd3 /gcc/c-family | |
| parent | 286e8fc16fb582ee1cb3869aafb87309542a55ec (diff) | |
| download | gcc-2a99e5e633fb1faddeb8c8ce7b1429dedebb033b.zip gcc-2a99e5e633fb1faddeb8c8ce7b1429dedebb033b.tar.gz gcc-2a99e5e633fb1faddeb8c8ce7b1429dedebb033b.tar.bz2 | |
re PR c++/55203 (No unused warning for variables of non-trivial types)
PR c++/55203
c-family/
* c-common.c (c_common_attribute_table): Add warn_unused.
(handle_warn_unused_attribute): New.
cp/
* init.c (build_aggr_init): Check for warn_unused attribute.
* decl.c (poplevel): Likewise.
From-SVN: r200941
Diffstat (limited to 'gcc/c-family')
| -rw-r--r-- | gcc/c-family/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/c-family/c-common.c | 24 |
2 files changed, 30 insertions, 0 deletions
diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index 5aeb338..27b22a1 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -1,3 +1,9 @@ +2013-07-13 Lubos Lunak <l.lunak@suse.cz> + + PR c++/55203 + * c-common.c (c_common_attribute_table): Add warn_unused. + (handle_warn_unused_attribute): New. + 2013-07-10 Jakub Jelinek <jakub@redhat.com> * c-ppoutput.c (scan_translation_unit): Call account_for_newlines diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index 61300cd..970f9f2 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -368,6 +368,7 @@ static tree handle_optimize_attribute (tree *, tree, tree, int, bool *); static tree ignore_attribute (tree *, tree, tree, int, bool *); static tree handle_no_split_stack_attribute (tree *, tree, tree, int, bool *); static tree handle_fnspec_attribute (tree *, tree, tree, int, bool *); +static tree handle_warn_unused_attribute (tree *, tree, tree, int, bool *); static void check_function_nonnull (tree, int, tree *); static void check_nonnull_arg (void *, tree, unsigned HOST_WIDE_INT); @@ -738,6 +739,8 @@ const struct attribute_spec c_common_attribute_table[] = The name contains space to prevent its usage in source code. */ { "fn spec", 1, 1, false, true, true, handle_fnspec_attribute, false }, + { "warn_unused", 0, 0, false, false, false, + handle_warn_unused_attribute, false }, { NULL, 0, 0, false, false, false, NULL, false } }; @@ -7950,6 +7953,27 @@ handle_fnspec_attribute (tree *node ATTRIBUTE_UNUSED, tree ARG_UNUSED (name), return NULL_TREE; } +/* Handle a "warn_unused" attribute; arguments as in + struct attribute_spec.handler. */ + +static tree +handle_warn_unused_attribute (tree *node, tree name, + tree args ATTRIBUTE_UNUSED, + int flags ATTRIBUTE_UNUSED, bool *no_add_attrs) +{ + if (TYPE_P (*node)) + /* Do nothing else, just set the attribute. We'll get at + it later with lookup_attribute. */ + ; + else + { + warning (OPT_Wattributes, "%qE attribute ignored", name); + *no_add_attrs = true; + } + + return NULL_TREE; +} + /* Handle a "returns_twice" attribute; arguments as in struct attribute_spec.handler. */ |