commit c35333d1fdbfec21f4af58537fb8c68e11fdfefd
author Mirko Bonadei <mbonadei@webrtc.org> Thu Oct 31 10:07:31 2019
committer Commit Bot <commit-bot@chromium.org> Thu Oct 31 11:12:52 2019
tree 4f5ac8e666661201abe70e3770c606c656e45c71
parent de365955dc6a17cc4ce520da3e8956bb2b322ce1

Add RTC_EXPORT_TEMPLATE_{DECLARE,DEFINE} macros.

This CL adds macros to correctly export template instantiation
declarations and definitions. These macros have been borrowed from
Chromium's //base/export_template.h [1] and are supposed to be used
together with RTC_EXPORT [2].

The goal is to start using explicit template instatiation declarations
(introduced in C++11) [3] and remove workarounds that are not compatible
with all the compilers. An example can be found in [4], where in order
to workaround crbug.com/1018579, another workaround was almost created
before being stopped at code review time.

[1] - https://cs.chromium.org/chromium/src/base/export_template.h
[2] - https://cs.chromium.org/chromium/src/third_party/webrtc/rtc_base/system/rtc_export.h
[3] - https://en.cppreference.com/w/cpp/language/class_template#Explicit_instantiation
[4] - https://webrtc-review.googlesource.com/c/src/+/158674

Bug: webrtc:9419
Change-Id: I2e9287a15e28f619462e0b9a5deb0b672be248c6
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158742
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29661}