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* [Bug c++/96116] New: GCC accepts "enum struct/class" in reference to enumeration
@ 2020-07-08 14:29 haoxintu at gmail dot com
2020-07-08 14:35 ` [Bug c++/96116] " mpolacek at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: haoxintu at gmail dot com @ 2020-07-08 14:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96116
Bug ID: 96116
Summary: GCC accepts "enum struct/class" in reference to
enumeration
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: accepts-invalid
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: haoxintu at gmail dot com
Target Milestone: ---
Hi,all.
This code, might be an invalid code, but GCC accepts it.
$cat test.cc
using alias1 = enum struct E1;
using alias2 = enum class E2;
While in clang:
$clang++ test.cc
test.cc:1:21: error: reference to enumeration must use 'enum' not 'enum struct'
[-Welaborated-enum-class]
using alias1 = enum struct E1;
^~~~~~~
test.cc:2:21: error: reference to enumeration must use 'enum' not 'enum class'
[-Welaborated-enum-class]
using alias2 = enum class E2;
^~~~~~
2 errors generated.
Here is a related bug report in llvm:
https://bugs.llvm.org/show_bug.cgi?id=46603
They suggested that ""enum class" can only be used when defining an enumeration
or as part of a standalone forward declaration"
Versions from 6.1 to trunk behave the same. So is this an invalid code for GCC?
Thanks,
Haoxin
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2020-07-08 14:29 [Bug c++/96116] New: GCC accepts "enum struct/class" in reference to enumeration haoxintu at gmail dot com
2020-07-08 14:35 ` [Bug c++/96116] " mpolacek at gcc dot gnu.org
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