80 lines
2.9 KiB
Diff
80 lines
2.9 KiB
Diff
From 528e9a3e1f25bd264549c4c7779748abfd16bb1c Mon Sep 17 00:00:00 2001
|
|
From: Jan Wilken Dörrie <jdoerrie@chromium.org>
|
|
Date: Fri, 18 Oct 2019 11:45:24 +0000
|
|
Subject: [PATCH] Reland "GCC: Fix base::internal::InvokeFuncImpl"
|
|
|
|
This is a reland of 9293d5c86eec1c34fc00716645400b44a14e764e
|
|
|
|
Original change's description:
|
|
> GCC: Fix base::internal::InvokeFuncImpl
|
|
>
|
|
> GCC doesn't like that the Value data member has no out-of-line
|
|
> definition. The problem is triggered specifically only when compiling
|
|
>
|
|
> components/services/leveldb/leveldb_database_impl.cc
|
|
>
|
|
> which has lambda functions returning locally-defined classes.
|
|
>
|
|
> The current code works as-is in C++17 mode which introduces the concept
|
|
> of inline variables, but in C++14 we need either an explicit out-of-line
|
|
> definition or a function member instead of a data member.
|
|
>
|
|
> Use std::integral_constant for defining the value.
|
|
>
|
|
> Bug: 819294
|
|
> Change-Id: I5c68e14ce3fa9d8b4d8a2cb42d7f9b53938aabf3
|
|
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1862451
|
|
> Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
|
|
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
|
|
> Commit-Queue: Jüri Valdmann <juri.valdmann@qt.io>
|
|
> Cr-Commit-Position: refs/heads/master@{#706384}
|
|
|
|
Bug: 819294
|
|
Change-Id: I3d5a52ddc6815516e2239f9347c60de06bf765a2
|
|
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865212
|
|
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
|
|
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
|
|
Cr-Commit-Position: refs/heads/master@{#707329}
|
|
---
|
|
|
|
diff --git a/base/bind.h b/base/bind.h
|
|
index 7a400af..1070ce6 100644
|
|
--- a/base/bind.h
|
|
+++ b/base/bind.h
|
|
@@ -187,18 +187,15 @@
|
|
// well-formed. Using `Invoker::Run` with a OnceCallback triggers a
|
|
// static_assert, which is why the ternary expression does not compile.
|
|
// TODO(crbug.com/752720): Remove this indirection once we have `if constexpr`.
|
|
-template <bool is_once, typename Invoker>
|
|
-struct InvokeFuncImpl;
|
|
+template <typename Invoker>
|
|
+constexpr auto GetInvokeFunc(std::true_type) {
|
|
+ return Invoker::RunOnce;
|
|
+}
|
|
|
|
template <typename Invoker>
|
|
-struct InvokeFuncImpl<true, Invoker> {
|
|
- static constexpr auto Value = &Invoker::RunOnce;
|
|
-};
|
|
-
|
|
-template <typename Invoker>
|
|
-struct InvokeFuncImpl<false, Invoker> {
|
|
- static constexpr auto Value = &Invoker::Run;
|
|
-};
|
|
+constexpr auto GetInvokeFunc(std::false_type) {
|
|
+ return Invoker::Run;
|
|
+}
|
|
|
|
template <template <typename> class CallbackT,
|
|
typename Functor,
|
|
@@ -229,7 +226,8 @@
|
|
// InvokeFuncStorage, so that we can ensure its type matches to
|
|
// PolymorphicInvoke, to which CallbackType will cast back.
|
|
using PolymorphicInvoke = typename CallbackType::PolymorphicInvoke;
|
|
- PolymorphicInvoke invoke_func = InvokeFuncImpl<kIsOnce, Invoker>::Value;
|
|
+ PolymorphicInvoke invoke_func =
|
|
+ GetInvokeFunc<Invoker>(std::integral_constant<bool, kIsOnce>());
|
|
|
|
using InvokeFuncStorage = internal::BindStateBase::InvokeFuncStorage;
|
|
return CallbackType(BindState::Create(
|