From 096fb37a1976bbddde136c9db5fa88ac4332b802 Mon Sep 17 00:00:00 2001
From: Abseil Team <absl-team@google.com>
Date: Fri, 14 Dec 2018 15:24:21 -0500
Subject: Googletest export

Replace pump'd code for DoAll with variadic templates.

PiperOrigin-RevId: 225584656
---
 googlemock/include/gmock/gmock-actions.h           | 86 ++++++++++----------
 googlemock/include/gmock/gmock-generated-actions.h | 91 ----------------------
 .../include/gmock/gmock-generated-actions.h.pump   | 28 -------
 3 files changed, 40 insertions(+), 165 deletions(-)

diff --git a/googlemock/include/gmock/gmock-actions.h b/googlemock/include/gmock/gmock-actions.h
index 7105830..e0437f3 100644
--- a/googlemock/include/gmock/gmock-actions.h
+++ b/googlemock/include/gmock/gmock-actions.h
@@ -574,7 +574,7 @@ class ReturnAction {
   // This template type conversion operator allows Return(x) to be
   // used in ANY function that returns x's type.
   template <typename F>
-  operator Action<F>() const {
+  operator Action<F>() const {  // NOLINT
     // Assert statement belongs here because this is the best place to verify
     // conditions on F. It produces the clearest error messages
     // in most compilers.
@@ -587,6 +587,8 @@ class ReturnAction {
     GTEST_COMPILE_ASSERT_(
         !is_reference<Result>::value,
         use_ReturnRef_instead_of_Return_to_return_a_reference);
+    static_assert(!std::is_void<Result>::value,
+                  "Can't use Return() on an action expected to return `void`.");
     return Action<F>(new Impl<R, F>(value_));
   }
 
@@ -1017,51 +1019,6 @@ void PrintTo(const ReferenceWrapper<T>& ref, ::std::ostream* os) {
   UniversalPrinter<T&>::Print(value, os);
 }
 
-// Does two actions sequentially.  Used for implementing the DoAll(a1,
-// a2, ...) action.
-template <typename Action1, typename Action2>
-class DoBothAction {
- public:
-  DoBothAction(Action1 action1, Action2 action2)
-      : action1_(action1), action2_(action2) {}
-
-  // This template type conversion operator allows DoAll(a1, ..., a_n)
-  // to be used in ANY function of compatible type.
-  template <typename F>
-  operator Action<F>() const {
-    return Action<F>(new Impl<F>(action1_, action2_));
-  }
-
- private:
-  // Implements the DoAll(...) action for a particular function type F.
-  template <typename F>
-  class Impl : public ActionInterface<F> {
-   public:
-    typedef typename Function<F>::Result Result;
-    typedef typename Function<F>::ArgumentTuple ArgumentTuple;
-    typedef typename Function<F>::MakeResultVoid VoidResult;
-
-    Impl(const Action<VoidResult>& action1, const Action<F>& action2)
-        : action1_(action1), action2_(action2) {}
-
-    Result Perform(const ArgumentTuple& args) override {
-      action1_.Perform(args);
-      return action2_.Perform(args);
-    }
-
-   private:
-    const Action<VoidResult> action1_;
-    const Action<F> action2_;
-
-    GTEST_DISALLOW_ASSIGN_(Impl);
-  };
-
-  Action1 action1_;
-  Action2 action2_;
-
-  GTEST_DISALLOW_ASSIGN_(DoBothAction);
-};
-
 template <typename InnerAction, size_t... I>
 struct WithArgsAction {
   InnerAction action;
@@ -1080,6 +1037,35 @@ struct WithArgsAction {
   }
 };
 
+template <typename... Actions>
+struct DoAllAction {
+ private:
+  template <typename... Args, size_t... I>
+  std::vector<Action<void(Args...)>> Convert(IndexSequence<I...>) const {
+    return {std::get<I>(actions)...};
+  }
+
+ public:
+  std::tuple<Actions...> actions;
+
+  template <typename R, typename... Args>
+  operator Action<R(Args...)>() const {  // NOLINT
+    struct Op {
+      std::vector<Action<void(Args...)>> converted;
+      Action<R(Args...)> last;
+      R operator()(Args... args) const {
+        auto tuple_args = std::forward_as_tuple(std::forward<Args>(args)...);
+        for (auto& a : converted) {
+          a.Perform(tuple_args);
+        }
+        return last.Perform(tuple_args);
+      }
+    };
+    return Op{Convert<Args...>(MakeIndexSequence<sizeof...(Actions) - 1>()),
+              std::get<sizeof...(Actions) - 1>(actions)};
+  }
+};
+
 }  // namespace internal
 
 // An Unused object can be implicitly constructed from ANY value.
@@ -1130,6 +1116,14 @@ Action<To>::Action(const Action<From>& from)
                 : new internal::ActionAdaptor<To, From>(from)) {
 }
 
+// Creates an action that does actions a1, a2, ..., sequentially in
+// each invocation.
+template <typename... Action>
+internal::DoAllAction<typename std::decay<Action>::type...> DoAll(
+    Action&&... action) {
+  return {std::forward_as_tuple(std::forward<Action>(action)...)};
+}
+
 // WithArg<k>(an_action) creates an action that passes the k-th
 // (0-based) argument of the mock function to an_action and performs
 // it.  It adapts an action accepting one argument to one that accepts
diff --git a/googlemock/include/gmock/gmock-generated-actions.h b/googlemock/include/gmock/gmock-generated-actions.h
index fac491b..910436e 100644
--- a/googlemock/include/gmock/gmock-generated-actions.h
+++ b/googlemock/include/gmock/gmock-generated-actions.h
@@ -474,97 +474,6 @@ class ActionHelper {
 };
 
 }  // namespace internal
-
-// Creates an action that does actions a1, a2, ..., sequentially in
-// each invocation.
-template <typename Action1, typename Action2>
-inline internal::DoBothAction<Action1, Action2>
-DoAll(Action1 a1, Action2 a2) {
-  return internal::DoBothAction<Action1, Action2>(a1, a2);
-}
-
-template <typename Action1, typename Action2, typename Action3>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    Action3> >
-DoAll(Action1 a1, Action2 a2, Action3 a3) {
-  return DoAll(a1, DoAll(a2, a3));
-}
-
-template <typename Action1, typename Action2, typename Action3,
-    typename Action4>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    internal::DoBothAction<Action3, Action4> > >
-DoAll(Action1 a1, Action2 a2, Action3 a3, Action4 a4) {
-  return DoAll(a1, DoAll(a2, a3, a4));
-}
-
-template <typename Action1, typename Action2, typename Action3,
-    typename Action4, typename Action5>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    internal::DoBothAction<Action3, internal::DoBothAction<Action4,
-    Action5> > > >
-DoAll(Action1 a1, Action2 a2, Action3 a3, Action4 a4, Action5 a5) {
-  return DoAll(a1, DoAll(a2, a3, a4, a5));
-}
-
-template <typename Action1, typename Action2, typename Action3,
-    typename Action4, typename Action5, typename Action6>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    internal::DoBothAction<Action3, internal::DoBothAction<Action4,
-    internal::DoBothAction<Action5, Action6> > > > >
-DoAll(Action1 a1, Action2 a2, Action3 a3, Action4 a4, Action5 a5, Action6 a6) {
-  return DoAll(a1, DoAll(a2, a3, a4, a5, a6));
-}
-
-template <typename Action1, typename Action2, typename Action3,
-    typename Action4, typename Action5, typename Action6, typename Action7>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    internal::DoBothAction<Action3, internal::DoBothAction<Action4,
-    internal::DoBothAction<Action5, internal::DoBothAction<Action6,
-    Action7> > > > > >
-DoAll(Action1 a1, Action2 a2, Action3 a3, Action4 a4, Action5 a5, Action6 a6,
-    Action7 a7) {
-  return DoAll(a1, DoAll(a2, a3, a4, a5, a6, a7));
-}
-
-template <typename Action1, typename Action2, typename Action3,
-    typename Action4, typename Action5, typename Action6, typename Action7,
-    typename Action8>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    internal::DoBothAction<Action3, internal::DoBothAction<Action4,
-    internal::DoBothAction<Action5, internal::DoBothAction<Action6,
-    internal::DoBothAction<Action7, Action8> > > > > > >
-DoAll(Action1 a1, Action2 a2, Action3 a3, Action4 a4, Action5 a5, Action6 a6,
-    Action7 a7, Action8 a8) {
-  return DoAll(a1, DoAll(a2, a3, a4, a5, a6, a7, a8));
-}
-
-template <typename Action1, typename Action2, typename Action3,
-    typename Action4, typename Action5, typename Action6, typename Action7,
-    typename Action8, typename Action9>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    internal::DoBothAction<Action3, internal::DoBothAction<Action4,
-    internal::DoBothAction<Action5, internal::DoBothAction<Action6,
-    internal::DoBothAction<Action7, internal::DoBothAction<Action8,
-    Action9> > > > > > > >
-DoAll(Action1 a1, Action2 a2, Action3 a3, Action4 a4, Action5 a5, Action6 a6,
-    Action7 a7, Action8 a8, Action9 a9) {
-  return DoAll(a1, DoAll(a2, a3, a4, a5, a6, a7, a8, a9));
-}
-
-template <typename Action1, typename Action2, typename Action3,
-    typename Action4, typename Action5, typename Action6, typename Action7,
-    typename Action8, typename Action9, typename Action10>
-inline internal::DoBothAction<Action1, internal::DoBothAction<Action2,
-    internal::DoBothAction<Action3, internal::DoBothAction<Action4,
-    internal::DoBothAction<Action5, internal::DoBothAction<Action6,
-    internal::DoBothAction<Action7, internal::DoBothAction<Action8,
-    internal::DoBothAction<Action9, Action10> > > > > > > > >
-DoAll(Action1 a1, Action2 a2, Action3 a3, Action4 a4, Action5 a5, Action6 a6,
-    Action7 a7, Action8 a8, Action9 a9, Action10 a10) {
-  return DoAll(a1, DoAll(a2, a3, a4, a5, a6, a7, a8, a9, a10));
-}
-
 }  // namespace testing
 
 // The ACTION* family of macros can be used in a namespace scope to
diff --git a/googlemock/include/gmock/gmock-generated-actions.h.pump b/googlemock/include/gmock/gmock-generated-actions.h.pump
index d38b1f9..27c96ef 100644
--- a/googlemock/include/gmock/gmock-generated-actions.h.pump
+++ b/googlemock/include/gmock/gmock-generated-actions.h.pump
@@ -165,34 +165,6 @@ $template
 };
 
 }  // namespace internal
-
-// Creates an action that does actions a1, a2, ..., sequentially in
-// each invocation.
-$range i 2..n
-$for i [[
-$range j 2..i
-$var types = [[$for j, [[typename Action$j]]]]
-$var Aas = [[$for j [[, Action$j a$j]]]]
-
-template <typename Action1, $types>
-$range k 1..i-1
-
-inline $for k [[internal::DoBothAction<Action$k, ]]Action$i$for k  [[>]]
-
-DoAll(Action1 a1$Aas) {
-$if i==2 [[
-
-  return internal::DoBothAction<Action1, Action2>(a1, a2);
-]] $else [[
-$range j2 2..i
-
-  return DoAll(a1, DoAll($for j2, [[a$j2]]));
-]]
-
-}
-
-]]
-
 }  // namespace testing
 
 // The ACTION* family of macros can be used in a namespace scope to
-- 
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