From: Lancelot SIX <lsix@lancelotsix.com>
To: Simon Marchi <simon.marchi@efficios.com>
Cc: gdb-patches@sourceware.org
Subject: Re: [PATCH 2/2] gdb: fix array-view-selftests.c build with g++ 4.8
Date: Thu, 18 Nov 2021 21:11:32 +0000 [thread overview]
Message-ID: <20211118211132.sobuijcdi74wm4i7@ubuntu.lan> (raw)
In-Reply-To: <20211118205053.2429353-2-simon.marchi@efficios.com>
On Thu, Nov 18, 2021 at 03:50:53PM -0500, Simon Marchi via Gdb-patches wrote:
> When building with g++ 4.8, I get:
>
> CXX unittests/array-view-selftests.o
> /home/smarchi/src/binutils-gdb/gdb/unittests/array-view-selftests.c:123:42: error: expected 'class' before 'Container'
> template<template<typename ...> typename Container>
> ^
>
> I am no C++ template expert, but it looks like if I change "typename" for
> "class", as the compiler kind of suggests, the code compiles.
Indeed. Apparently 'typename' can be used instead of 'class' in a
template template parameter only starting c++17[1].
Thanks for taking care of this.
Lancelot.
[1] https://en.cppreference.com/w/cpp/language/template_parameters#Template_template_parameter
q>
> Change-Id: I9c3edd29fb2b190069f0ce0dbf3bc3604d175f48
> ---
> gdb/unittests/array-view-selftests.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/gdb/unittests/array-view-selftests.c b/gdb/unittests/array-view-selftests.c
> index fe211a647b5..9df48db3912 100644
> --- a/gdb/unittests/array-view-selftests.c
> +++ b/gdb/unittests/array-view-selftests.c
> @@ -120,7 +120,7 @@ check ()
> /* Check that there's no container->view conversion for containers of derived
> types or subclasses. */
>
> -template<template<typename ...> typename Container>
> +template<template<typename ...> class Container>
> static constexpr bool
> check_ctor_from_container ()
> {
> --
> 2.33.1
>
next prev parent reply other threads:[~2021-11-18 21:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-18 20:50 [PATCH 1/2] gdb: fix ia64-tdep.c " Simon Marchi
2021-11-18 20:50 ` [PATCH 2/2] gdb: fix array-view-selftests.c " Simon Marchi
2021-11-18 21:11 ` Lancelot SIX [this message]
2021-11-18 21:36 ` Simon Marchi
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