[Bug 281359] devel/opentelemetry-cpp: fix build with clang 19

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 08 Sep 2024 09:19:38 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281359

            Bug ID: 281359
           Summary: devel/opentelemetry-cpp: fix build with clang 19
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: osa@FreeBSD.org
          Reporter: dim@FreeBSD.org
             Flags: maintainer-feedback?(osa@FreeBSD.org)
          Assignee: osa@FreeBSD.org

Clang 19 now implements CWG 96 [1], which requires a template argument
list after a 'template' keyword, resulting in errors similar to:

   
/wrkdirs/usr/ports/devel/opentelemetry-cpp/work/opentelemetry-cpp-1.16.1/api/include/opentelemetry/logs/logger_type_traits.h:169:69:
error: a template argument list is expected after a name prefixed by the
template keyword [-Wmissing-template-arg-list-after-template-kw]
      169 |     return LogRecordSetterTrait<common::KeyValueIterable>::template
Set(
          |                                                                    
^
   
/wrkdirs/usr/ports/devel/opentelemetry-cpp/work/opentelemetry-cpp-1.16.1/api/include/opentelemetry/logs/logger.h:76:89:
error: a template argument list is expected after a name prefixed by the
template keyword [-Wmissing-template-arg-list-after-template-kw]
       76 |         detail::LogRecordSetterTrait<typename
std::decay<ArgumentType>::type>::template Set(
          |                                                                    
                    ^
   
/wrkdirs/usr/ports/devel/opentelemetry-cpp/work/opentelemetry-cpp-1.16.1/api/include/opentelemetry/logs/event_logger.h:69:89:
error: a template argument list is expected after a name prefixed by the
template keyword [-Wmissing-template-arg-list-after-template-kw]
       69 |         detail::LogRecordSetterTrait<typename
std::decay<ArgumentType>::type>::template Set(
          |                                                                    
                    ^

In these cases, appending "<>" is enough to satisfy the constraint.

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