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Refactor the `Invoke` and `InvokeWithoutArgs` actions:
 - Replace pump'd classes and functions with templates.
 - Make the polymorphic actions be polymorphic functors instead.
 - Fix Invoke(Callback*) to work with subclasses of the callbacks, instead of trying to diagnose that in gmock_doctor.

PiperOrigin-RevId: 229604112
This commit is contained in:
Abseil Team 2019-01-16 15:23:44 -05:00 committed by Alex Strelnikov
parent eb9225ce36
commit 0adeadd283
7 changed files with 56 additions and 497 deletions
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110
googlemock/include/gmock/gmock-actions.h
View File

@ -817,69 +817,47 @@ class SetArgumentPointeeAction<N, Proto, true> {
GTEST_DISALLOW_ASSIGN_(SetArgumentPointeeAction);
};
// Implements the Invoke(object_ptr, &Class::Method) action.
template <class Class, typename MethodPtr>
struct InvokeMethodAction {
Class* const obj_ptr;
const MethodPtr method_ptr;
template <typename... Args>
auto operator()(Args&&... args) const
-> decltype((obj_ptr->*method_ptr)(std::forward<Args>(args)...)) {
return (obj_ptr->*method_ptr)(std::forward<Args>(args)...);
}
};
// Implements the InvokeWithoutArgs(f) action. The template argument
// FunctionImpl is the implementation type of f, which can be either a
// function pointer or a functor. InvokeWithoutArgs(f) can be used as an
// Action<F> as long as f's type is compatible with F (i.e. f can be
// assigned to a tr1::function<F>).
// Action<F> as long as f's type is compatible with F.
template <typename FunctionImpl>
class InvokeWithoutArgsAction {
public:
// The c'tor makes a copy of function_impl (either a function
// pointer or a functor).
explicit InvokeWithoutArgsAction(FunctionImpl function_impl)
: function_impl_(function_impl) {}
struct InvokeWithoutArgsAction {
FunctionImpl function_impl;
// Allows InvokeWithoutArgs(f) to be used as any action whose type is
// compatible with f.
template <typename Result, typename ArgumentTuple>
Result Perform(const ArgumentTuple&) { return function_impl_(); }
private:
FunctionImpl function_impl_;
GTEST_DISALLOW_ASSIGN_(InvokeWithoutArgsAction);
template <typename... Args>
auto operator()(const Args&...) -> decltype(function_impl()) {
return function_impl();
}
};
// Implements the InvokeWithoutArgs(object_ptr, &Class::Method) action.
template <class Class, typename MethodPtr>
class InvokeMethodWithoutArgsAction {
public:
InvokeMethodWithoutArgsAction(Class* obj_ptr, MethodPtr method_ptr)
: obj_ptr_(obj_ptr), method_ptr_(method_ptr) {}
struct InvokeMethodWithoutArgsAction {
Class* const obj_ptr;
const MethodPtr method_ptr;
template <typename Result, typename ArgumentTuple>
Result Perform(const ArgumentTuple&) const {
return (obj_ptr_->*method_ptr_)();
using ReturnType = typename std::result_of<MethodPtr(Class*)>::type;
template <typename... Args>
ReturnType operator()(const Args&...) const {
return (obj_ptr->*method_ptr)();
}
private:
Class* const obj_ptr_;
const MethodPtr method_ptr_;
GTEST_DISALLOW_ASSIGN_(InvokeMethodWithoutArgsAction);
};
// Implements the InvokeWithoutArgs(callback) action.
template <typename CallbackType>
class InvokeCallbackWithoutArgsAction {
public:
// The c'tor takes ownership of the callback.
explicit InvokeCallbackWithoutArgsAction(CallbackType* callback)
: callback_(callback) {
callback->CheckIsRepeatable(); // Makes sure the callback is permanent.
}
// This type conversion operator template allows Invoke(callback) to
// be used wherever the callback's return type can be implicitly
// converted to that of the mock function.
template <typename Result, typename ArgumentTuple>
Result Perform(const ArgumentTuple&) const { return callback_->Run(); }
private:
const std::shared_ptr<CallbackType> callback_;
GTEST_DISALLOW_ASSIGN_(InvokeCallbackWithoutArgsAction);
};
// Implements the IgnoreResult(action) action.
@ -1157,24 +1135,38 @@ SetErrnoAndReturn(int errval, T result) {
#endif // !GTEST_OS_WINDOWS_MOBILE
// Various overloads for InvokeWithoutArgs().
// Various overloads for Invoke().
// Legacy function.
// Actions can now be implicitly constructed from callables. No need to create
// wrapper objects.
// This function exists for backwards compatibility.
template <typename FunctionImpl>
typename std::decay<FunctionImpl>::type Invoke(FunctionImpl&& function_impl) {
return std::forward<FunctionImpl>(function_impl);
}
// Creates an action that invokes the given method on the given object
// with the mock function's arguments.
template <class Class, typename MethodPtr>
internal::InvokeMethodAction<Class, MethodPtr> Invoke(Class* obj_ptr,
MethodPtr method_ptr) {
return {obj_ptr, method_ptr};
}
// Creates an action that invokes 'function_impl' with no argument.
template <typename FunctionImpl>
PolymorphicAction<internal::InvokeWithoutArgsAction<FunctionImpl> >
internal::InvokeWithoutArgsAction<typename std::decay<FunctionImpl>::type>
InvokeWithoutArgs(FunctionImpl function_impl) {
return MakePolymorphicAction(
internal::InvokeWithoutArgsAction<FunctionImpl>(function_impl));
return {std::move(function_impl)};
}
// Creates an action that invokes the given method on the given object
// with no argument.
template <class Class, typename MethodPtr>
PolymorphicAction<internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> >
InvokeWithoutArgs(Class* obj_ptr, MethodPtr method_ptr) {
return MakePolymorphicAction(
internal::InvokeMethodWithoutArgsAction<Class, MethodPtr>(
obj_ptr, method_ptr));
internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> InvokeWithoutArgs(
Class* obj_ptr, MethodPtr method_ptr) {
return {obj_ptr, method_ptr};
}
// Creates an action that performs an_action and throws away its

302
googlemock/include/gmock/gmock-generated-actions.h
View File

@ -50,308 +50,6 @@
namespace testing {
namespace internal {
// InvokeHelper<F> knows how to unpack an N-tuple and invoke an N-ary
// function, method, or callback with the unpacked values, where F is
// a function type that takes N arguments.
template <typename Result, typename ArgumentTuple>
class InvokeHelper;
template <typename R>
class InvokeHelper<R, ::std::tuple<> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<>&) {
return function();
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<>&) {
return (obj_ptr->*method_ptr)();
}
template <typename CallbackType>
static R InvokeCallback(CallbackType* callback,
const ::std::tuple<>&) {
return callback->Run();
}
};
template <typename R, typename A1>
class InvokeHelper<R, ::std::tuple<A1> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1>& args) {
return function(std::get<0>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args));
}
template <typename CallbackType>
static R InvokeCallback(CallbackType* callback,
const ::std::tuple<A1>& args) {
return callback->Run(std::get<0>(args));
}
};
template <typename R, typename A1, typename A2>
class InvokeHelper<R, ::std::tuple<A1, A2> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2>& args) {
return function(std::get<0>(args), std::get<1>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args));
}
template <typename CallbackType>
static R InvokeCallback(CallbackType* callback,
const ::std::tuple<A1, A2>& args) {
return callback->Run(std::get<0>(args), std::get<1>(args));
}
};
template <typename R, typename A1, typename A2, typename A3>
class InvokeHelper<R, ::std::tuple<A1, A2, A3> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args));
}
template <typename CallbackType>
static R InvokeCallback(CallbackType* callback,
const ::std::tuple<A1, A2, A3>& args) {
return callback->Run(std::get<0>(args), std::get<1>(args),
std::get<2>(args));
}
};
template <typename R, typename A1, typename A2, typename A3, typename A4>
class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3, A4>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args));
}
template <typename CallbackType>
static R InvokeCallback(CallbackType* callback,
const ::std::tuple<A1, A2, A3, A4>& args) {
return callback->Run(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args));
}
};
template <typename R, typename A1, typename A2, typename A3, typename A4,
typename A5>
class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4,
A5>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3, A4, A5>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args));
}
template <typename CallbackType>
static R InvokeCallback(CallbackType* callback,
const ::std::tuple<A1, A2, A3, A4, A5>& args) {
return callback->Run(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args));
}
};
template <typename R, typename A1, typename A2, typename A3, typename A4,
typename A5, typename A6>
class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5,
A6>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3, A4, A5, A6>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args));
}
// There is no InvokeCallback() for 6-tuples
};
template <typename R, typename A1, typename A2, typename A3, typename A4,
typename A5, typename A6, typename A7>
class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
A7>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3, A4, A5, A6, A7>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args));
}
// There is no InvokeCallback() for 7-tuples
};
template <typename R, typename A1, typename A2, typename A3, typename A4,
typename A5, typename A6, typename A7, typename A8>
class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
A7, A8>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args), std::get<7>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3, A4, A5, A6, A7,
A8>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args), std::get<7>(args));
}
// There is no InvokeCallback() for 8-tuples
};
template <typename R, typename A1, typename A2, typename A3, typename A4,
typename A5, typename A6, typename A7, typename A8, typename A9>
class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
A7, A8, A9>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args), std::get<7>(args),
std::get<8>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8,
A9>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args), std::get<7>(args),
std::get<8>(args));
}
// There is no InvokeCallback() for 9-tuples
};
template <typename R, typename A1, typename A2, typename A3, typename A4,
typename A5, typename A6, typename A7, typename A8, typename A9,
typename A10>
class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9, A10> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
A7, A8, A9, A10>& args) {
return function(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args), std::get<7>(args),
std::get<8>(args), std::get<9>(args));
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9,
A10>& args) {
return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
std::get<2>(args), std::get<3>(args), std::get<4>(args),
std::get<5>(args), std::get<6>(args), std::get<7>(args),
std::get<8>(args), std::get<9>(args));
}
// There is no InvokeCallback() for 10-tuples
};
// Implements the Invoke(callback) action.
template <typename CallbackType>
class InvokeCallbackAction {
public:
// The c'tor takes ownership of the callback.
explicit InvokeCallbackAction(CallbackType* callback)
: callback_(callback) {
callback->CheckIsRepeatable(); // Makes sure the callback is permanent.
}
// This type conversion operator template allows Invoke(callback) to
// be used wherever the callback's type is compatible with that of
// the mock function, i.e. if the mock function's arguments can be
// implicitly converted to the callback's arguments and the
// callback's result can be implicitly converted to the mock
// function's result.
template <typename Result, typename ArgumentTuple>
Result Perform(const ArgumentTuple& args) const {
return InvokeHelper<Result, ArgumentTuple>::InvokeCallback(
callback_.get(), args);
}
private:
const std::shared_ptr<CallbackType> callback_;
};
// A macro from the ACTION* family (defined later in this file)
// defines an action that can be used in a mock function. Typically,
// these actions only care about a subset of the arguments of the mock

70
googlemock/include/gmock/gmock-generated-actions.h.pump
View File

@ -52,76 +52,6 @@ $$}} This meta comment fixes auto-indentation in editors.
namespace testing {
namespace internal {
// InvokeHelper<F> knows how to unpack an N-tuple and invoke an N-ary
// function, method, or callback with the unpacked values, where F is
// a function type that takes N arguments.
template <typename Result, typename ArgumentTuple>
class InvokeHelper;
$var max_callback_arity = 5
$range i 0..n
$for i [[
$range j 1..i
$var types = [[$for j [[, typename A$j]]]]
$var as = [[$for j, [[A$j]]]]
$var args = [[$if i==0 [[]] $else [[ args]]]]
$var gets = [[$for j, [[std::get<$(j - 1)>(args)]]]]
template <typename R$types>
class InvokeHelper<R, ::std::tuple<$as> > {
public:
template <typename Function>
static R Invoke(Function function, const ::std::tuple<$as>&$args) {
return function($gets);
}
template <class Class, typename MethodPtr>
static R InvokeMethod(Class* obj_ptr,
MethodPtr method_ptr,
const ::std::tuple<$as>&$args) {
return (obj_ptr->*method_ptr)($gets);
}
$if i <= max_callback_arity [[
template <typename CallbackType>
static R InvokeCallback(CallbackType* callback,
const ::std::tuple<$as>&$args) {
return callback->Run($gets);
}
]] $else [[
// There is no InvokeCallback() for $i-tuples
]]
};
]]
// Implements the Invoke(callback) action.
template <typename CallbackType>
class InvokeCallbackAction {
public:
// The c'tor takes ownership of the callback.
explicit InvokeCallbackAction(CallbackType* callback)
: callback_(callback) {
callback->CheckIsRepeatable(); // Makes sure the callback is permanent.
}
// This type conversion operator template allows Invoke(callback) to
// be used wherever the callback's type is compatible with that of
// the mock function, i.e. if the mock function's arguments can be
// implicitly converted to the callback's arguments and the
// callback's result can be implicitly converted to the mock
// function's result.
template <typename Result, typename ArgumentTuple>
Result Perform(const ArgumentTuple& args) const {
return InvokeHelper<Result, ArgumentTuple>::InvokeCallback(
callback_.get(), args);
}
private:
const std::shared_ptr<CallbackType> callback_;
};
// A macro from the ACTION* family (defined later in this file)
// defines an action that can be used in a mock function. Typically,
// these actions only care about a subset of the arguments of the mock

66
googlemock/include/gmock/gmock-more-actions.h
View File

@ -38,59 +38,13 @@
#define GMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
#include <algorithm>
#include <type_traits>
#include "gmock/gmock-generated-actions.h"
namespace testing {
namespace internal {
// Implements the Invoke(f) action. The template argument
// FunctionImpl is the implementation type of f, which can be either a
// function pointer or a functor. Invoke(f) can be used as an
// Action<F> as long as f's type is compatible with F (i.e. f can be
// assigned to a tr1::function<F>).
template <typename FunctionImpl>
class InvokeAction {
public:
// The c'tor makes a copy of function_impl (either a function
// pointer or a functor).
explicit InvokeAction(FunctionImpl function_impl)
: function_impl_(function_impl) {}
template <typename Result, typename ArgumentTuple>
Result Perform(const ArgumentTuple& args) {
return InvokeHelper<Result, ArgumentTuple>::Invoke(function_impl_, args);
}
private:
FunctionImpl function_impl_;
GTEST_DISALLOW_ASSIGN_(InvokeAction);
};
// Implements the Invoke(object_ptr, &Class::Method) action.
template <class Class, typename MethodPtr>
class InvokeMethodAction {
public:
InvokeMethodAction(Class* obj_ptr, MethodPtr method_ptr)
: method_ptr_(method_ptr), obj_ptr_(obj_ptr) {}
template <typename Result, typename ArgumentTuple>
Result Perform(const ArgumentTuple& args) const {
return InvokeHelper<Result, ArgumentTuple>::InvokeMethod(
obj_ptr_, method_ptr_, args);
}
private:
// The order of these members matters. Reversing the order can trigger
// warning C4121 in MSVC (see
// http://computer-programming-forum.com/7-vc.net/6fbc30265f860ad1.htm ).
const MethodPtr method_ptr_;
Class* const obj_ptr_;
GTEST_DISALLOW_ASSIGN_(InvokeMethodAction);
};
// An internal replacement for std::copy which mimics its behavior. This is
// necessary because Visual Studio deprecates ::std::copy, issuing warning 4996.
// However Visual Studio 2010 and later do not honor #pragmas which disable that
@ -109,24 +63,6 @@ inline OutputIterator CopyElements(InputIterator first,
// Various overloads for Invoke().
// Creates an action that invokes 'function_impl' with the mock
// function's arguments.
template <typename FunctionImpl>
PolymorphicAction<internal::InvokeAction<FunctionImpl> > Invoke(
FunctionImpl function_impl) {
return MakePolymorphicAction(
internal::InvokeAction<FunctionImpl>(function_impl));
}
// Creates an action that invokes the given method on the given object
// with the mock function's arguments.
template <class Class, typename MethodPtr>
PolymorphicAction<internal::InvokeMethodAction<Class, MethodPtr> > Invoke(
Class* obj_ptr, MethodPtr method_ptr) {
return MakePolymorphicAction(
internal::InvokeMethodAction<Class, MethodPtr>(obj_ptr, method_ptr));
}
// The ACTION*() macros trigger warning C4100 (unreferenced formal
// parameter) in MSVC with -W4. Unfortunately they cannot be fixed in
// the macro definition, as the warnings are generated when the macro

1
googlemock/include/gmock/internal/gmock-internal-utils.h
View File

@ -42,6 +42,7 @@
#include <stdio.h>
#include <ostream> // NOLINT
#include <string>
#include <type_traits>
#include "gmock/internal/gmock-port.h"
#include "gtest/gtest.h"

3
googlemock/test/gmock-actions_test.cc
View File

@ -54,12 +54,14 @@
namespace {
// This list should be kept sorted.
using testing::_;
using testing::Action;
using testing::ActionInterface;
using testing::Assign;
using testing::ByMove;
using testing::ByRef;
using testing::DefaultValue;
using testing::DoAll;
using testing::DoDefault;
using testing::IgnoreResult;
using testing::Invoke;
@ -75,7 +77,6 @@ using testing::SetArgPointee;
using testing::SetArgumentPointee;
using testing::Unused;
using testing::WithArgs;
using testing::_;
using testing::internal::BuiltInDefaultValue;
using testing::internal::Int64;
using testing::internal::UInt64;

1
googlemock/test/gmock-spec-builders_test.cc
View File

@ -78,6 +78,7 @@ using testing::Expectation;
using testing::ExpectationSet;
using testing::GMOCK_FLAG(verbose);
using testing::Gt;
using testing::IgnoreResult;
using testing::InSequence;
using testing::Invoke;
using testing::InvokeWithoutArgs;