Bootstrapped and regtested on x86_64-pc-linux-gnu, OK for trunk?
-- >8 --
This ensures that with modules enabled, redeclaring an enum in the wrong
module or with the wrong underlying type no longer ICEs.
The patch also rearranges the order of the checks a little because I
think it's probably more important to note that you can't redeclare the
enum all before complaining about mismatched underlying types etc.
As a drive by this patch also adds some missing diagnostic groups, and
rewords the module redeclaration error message to more closely match the
wording used in other places this check is done.
PR c++/99573
gcc/cp/ChangeLog:
* decl.cc (start_enum): Reorder check for redeclaring in module.
Add missing auto_diagnostic_groups.
gcc/testsuite/ChangeLog:
* g++.dg/modules/enum-12.C: New test.
Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com>
---
gcc/cp/decl.cc | 31 +++++++++++++++-----------
gcc/testsuite/g++.dg/modules/enum-12.C | 10 +++++++++
2 files changed, 28 insertions(+), 13 deletions(-)
create mode 100644 gcc/testsuite/g++.dg/modules/enum-12.C
diff --git a/gcc/cp/decl.cc b/gcc/cp/decl.cc
index 3e41fd4fa31..f982b5f88de 100644
--- a/gcc/cp/decl.cc
+++ b/gcc/cp/decl.cc
@@ -16951,12 +16951,28 @@ start_enum (tree name, tree enumtype, tree
underlying_type,
/*tag_scope=*/TAG_how::CURRENT_ONLY,
/*template_header_p=*/false);
+ /* Attempt to set the declaring module. */
+ if (modules_p () && enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
+ {
+ tree decl = TYPE_NAME (enumtype);
+ if (!module_may_redeclare (decl))
+ {
+ auto_diagnostic_group d;
+ error ("cannot declare %qD in different module", decl);
+ inform (DECL_SOURCE_LOCATION (decl), "previously declared here");
+ enumtype = error_mark_node;
+ }
+ else
+ set_instantiating_module (decl);
+ }
+
/* In case of a template_decl, the only check that should be deferred
to instantiation time is the comparison of underlying types. */
if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
{
if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
{
+ auto_diagnostic_group d;
error_at (input_location, "scoped/unscoped mismatch "
"in enum %q#T", enumtype);
inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
@@ -16965,6 +16981,7 @@ start_enum (tree name, tree enumtype, tree
underlying_type,
}
else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
{
+ auto_diagnostic_group d;
error_at (input_location, "underlying type mismatch "
"in enum %q#T", enumtype);
inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
@@ -16975,25 +16992,13 @@ start_enum (tree name, tree enumtype, tree
underlying_type,
&& !same_type_p (underlying_type,
ENUM_UNDERLYING_TYPE (enumtype)))
{
+ auto_diagnostic_group d;
error_at (input_location, "different underlying type "
"in enum %q#T", enumtype);
inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
"previous definition here");
underlying_type = NULL_TREE;
}
-
- if (modules_p ())
- {
- if (!module_may_redeclare (TYPE_NAME (enumtype)))
- {
- error ("cannot define %qD in different module",
- TYPE_NAME (enumtype));
- inform (DECL_SOURCE_LOCATION (TYPE_NAME (enumtype)),
- "declared here");
- enumtype = error_mark_node;
- }
- set_instantiating_module (TYPE_NAME (enumtype));
- }
}
if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
diff --git a/gcc/testsuite/g++.dg/modules/enum-12.C
b/gcc/testsuite/g++.dg/modules/enum-12.C
new file mode 100644
index 00000000000..57eeb85d92a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/modules/enum-12.C
@@ -0,0 +1,10 @@
+// PR c++/99573
+// { dg-additional-options "-fmodules-ts" }
+// { dg-module-cmi !foo }
+
+export module foo;
+namespace std {
+ enum class align_val_t : decltype(sizeof(int)) {}; // { dg-error "different
module" }
+}
+
+// { dg-prune-output "not writing module" }
--
2.43.0
