TEST_CASE_TEMPLATE causes "-Wunused-local-typedef" warning on Clang

[helmesjo]

Description

Building with -Wall on Clang (tested on 13.0) causes warning -Wunused-local-typedef to trigger when a TEST_CASE_TEMPLATE_INVOKE is placed inside a SCENARIO scope:

TEST_CASE_TEMPLATE_DEFINE("test", type_t, test_template)
{
}

SCENARIO("scenario")
{
    TEST_CASE_TEMPLATE_INVOKE(test_template, int); // Warning: `-Wunused-local-typedef`
}
TEST_CASE_TEMPLATE_INVOKE(test_template, int); // No warning

<source>:10:5: error: unused typedef 'DOCTEST_ANON_FOR_SEMICOLON_12' [-Werror,-Wunused-local-typedef]
    TEST_CASE_TEMPLATE_INVOKE(test_template, int);
    ^
/opt/compiler-explorer/libs/doctest/trunk/doctest/doctest.h:2647:44: note: expanded from macro 'TEST_CASE_TEMPLATE_INVOKE'
#define TEST_CASE_TEMPLATE_INVOKE(id, ...) DOCTEST_TEST_CASE_TEMPLATE_INVOKE(id, __VA_ARGS__)
                                           ^
/opt/compiler-explorer/libs/doctest/trunk/doctest/doctest.h:2052:17: note: expanded from macro 'DOCTEST_TEST_CASE_TEMPLATE_INVOKE'
    typedef int DOCTEST_ANONYMOUS(DOCTEST_ANON_FOR_SEMICOLON_)
                ^
/opt/compiler-explorer/libs/doctest/trunk/doctest/doctest.h:347:30: note: expanded from macro 'DOCTEST_ANONYMOUS'
#define DOCTEST_ANONYMOUS(x) DOCTEST_CAT(x, __COUNTER__)
                             ^
/opt/compiler-explorer/libs/doctest/trunk/doctest/doctest.h:345:29: note: expanded from macro 'DOCTEST_CAT'
#define DOCTEST_CAT(s1, s2) DOCTEST_CAT_IMPL(s1, s2)
                            ^
/opt/compiler-explorer/libs/doctest/trunk/doctest/doctest.h:344:34: note: expanded from macro 'DOCTEST_CAT_IMPL'
#define DOCTEST_CAT_IMPL(s1, s2) s1##s2
                                 ^
<scratch space>:392:1: note: expanded from here
DOCTEST_ANON_FOR_SEMICOLON_12
^

Reason I put it inside the SCENARIO scope is just to keep things organized.

Steps to reproduce

Repo-case

Extra information

Locally it triggers on GCC (11.2) as well, but not on godbolt for whatever reason.

• doctest version: v2.4.7
• Operating System: Ubuntu
• Compiler+version: Clang 13.0

[onqtam]

fixed in dev!