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[PATCH] PR77998 Remove std::thread::_Invoker::result_type

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Mon, 17 Oct 2016 13:23:03 +0100
Subject: [PATCH] PR77998 Remove std::thread::_Invoker::result_type
Authentication-results: sourceware.org; auth=none

This typedef uses the type before it's complete, which Clang rejects.
It's not necessary anyay, we can just use decltype directly where
needed. The _Invoker type isn't user-facing and doesn't need a
result_type.

	PR libstdc++/77998
	* include/std/future (__future_base::_Deferred_state)
	(__future_base::_Async_state_impl): Use decltype to deduce return
	type, instead of _Invoker::result_type.
	* include/std/thread (thread::_Invoker::operator()): Likewise.
	(thread::_Invoker::result_type): Remove.

Tested powerpc64le-linux, committed to trunk.

Attachment: patch.txt
Description: Text document

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