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Re: [C++ PATCH] Diagnose invalid auto fndecl without late return type or non-auto fndecl with late return type (PR c++/37967)

From: Jason Merrill <jason at redhat dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Fri, 31 Oct 2008 14:05:41 -0400
Subject: Re: [C++ PATCH] Diagnose invalid auto fndecl without late return type or non-auto fndecl with late return type (PR c++/37967)
References: <20081031154624.GY14706@tyan-ft48-01.lab.bos.redhat.com>

Jakub Jelinek wrote:

From my reading auto foo (); is invalid, as auto for function decls is
only allowed for late return types.

Yes.

Also, IMHO late return type requires
auto type and
"the type of the contained declarator-id in the declaration T D1 is
 `derived-declarator-type-list T,' T shall be the single type-specifier
 auto and the derived-declarator-type-list shall be empty."
IMHO means that even auto *foo () -> int; is invalid (correct me if
I'm wrong).

You are correct; I was waiting to implement that restriction until the changes to its specification settled down. The eventual resolution was:

http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#681

Ok for trunk?

Yes.

Jason

References:
- [C++ PATCH] Diagnose invalid auto fndecl without late return type or non-auto fndecl with late return type (PR c++/37967)
  - From: Jakub Jelinek

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