Silence MSVC C4100 (unused formal parameter) to fix breakage from recently added testcase.  This warning is silenced in many files throughout googletest, but was not needed here until this testcase was added.

PiperOrigin-RevId: 312121200

Mark ACTION_Pn()-generated functions as must-use-result.

This catches when a client creates an action and discards it, thinking that the action has actually been applied to something.

This will help people who make the mistake of defining, for example, both `void Use(Foo*)` and `ACTION(Use) { Use(arg); }` for later application to a Foo.  With such an overload, a client may then write `Use();`, forgetting the param and being confused why nothing happens.

This also catches when a client defines their own action in terms of an ACTION()-generated one, invokes the ACTION's builder, and then fails to invoke the resulting action, thinking it's operating on the outer action's parameters.

PiperOrigin-RevId: 312108101

Fix the ACTION* macros to allow for more than 10 arguments in the action.
Only the first 10 will be passed as individual arguments as `argN`, but the rest
can be accessed from the `args` tuple.

PiperOrigin-RevId: 311542098

Addresses https://github.com/google/googletest/pull/2784

PiperOrigin-RevId: 310902202

Fix `-Wgnu-zero-variadic-macro-arguments` in GMock

Passing zero arguments to the variadic part of a macro is a GNU
extension and triggers warnings when build projects using GMock with
`-pedantic`.

 - Fix uses of `GMOCK_PP_INTERNAL_16TH` to always receive at least 17
arguments. (this was triggered when `GMOCK_PP_NARG` or `GMOCK_PP_HAS_COMMA`
were used with an argument containing no commas).
 - Fix `GMOCK_PP_HEAD` to append a dummy unused argument so that
`GMOCK_PP_INTERNAL_HEAD` always has two arguments.

PiperOrigin-RevId: 310414611

Fix link to "high-perf dependency injection technique".

PiperOrigin-RevId: 308893893

internal change

PiperOrigin-RevId: 308648034

Rewrite ReturnNew action without using pump.

PiperOrigin-RevId: 308219616

Fix comment that describes how to test against nullopt.

PiperOrigin-RevId: 307448375

There is an unnecessary comma before 'and'

    gmock-spec-builders.h:503:3: error:
    definition of implicit copy constructor for 'Expectation' is deprecated
    because it has a user-declared destructor [-Werror,-Wdeprecated]
        ~Expectation();
        ^

None of these are strictly needed for correctness.
A large number of them (maybe all of them?) trigger `-Wdeprecated`
warnings on Clang trunk as soon as you try to use the implicitly
defaulted (but deprecated) copy constructor of a class that has
deleted its copy assignment operator.

By declaring a deleted copy assignment operator, the old code
also caused the move constructor and move assignment operator
to be non-declared. This means that the old code never got move
semantics -- "move-construction" would simply call the defaulted
(but deprecated) copy constructor instead. With the new code,
"move-construction" calls the defaulted move constructor, which
I believe is what we want to happen. So this is a runtime
performance optimization.

Unfortunately we can't yet physically remove the definitions
of these macros from gtest-port.h, because they are being used
by other code internally at Google (according to zhangxy988).
But no new uses should be added going forward.

We are about to remove all uses of GTEST_DISALLOW_ASSIGN_ in favor
of using the Rule of Zero everywhere.

Unfortunately, if we use the Rule of Zero here, then when the compiler
needs to figure out if VariadicMatcher is move-constructible, it will
recurse down into `tuple<Args...>`, which on libstdc++ recurses too deeply.

    In file included from googlemock/test/gmock-matchers_test.cc:43:
    In file included from googlemock/include/gmock/gmock-matchers.h:258:
    In file included from /usr/include/c++/5.5.0/algorithm:60:
    In file included from /usr/include/c++/5.5.0/utility:70:
    In file included from /usr/include/c++/5.5.0/bits/stl_pair.h:59:
    In file included from /usr/include/c++/5.5.0/bits/move.h:57:
    /usr/bin/include/c++/5.5.0/type_traits:115:26: fatal error:
          recursive template instantiation exceeded maximum depth of 256
        : public conditional<_B1::value, _B1, _B2>::type
                             ^

The move constructor is the only problematic case, for some unknown reason.
With GTEST_DISALLOW_ASSIGN_, the presence of a copy assignment operator
causes the move constructor to be non-declared, thus non-defaulted, thus
non-problematic. Without GTEST_DISALLOW_ASSIGN_, we have to do one of the
following:

- Default the copy constructor, so that the move constructor will be non-declared.

- Define our own non-defaulted move constructor.

...except that doing the latter STILL did not work!
Fortunately, the former (default the copy constructor, don't provide
any move constructor) both works in practice and is semantically
equivalent to the old code.

Fix link to "After clause". Sorry, reader, but this heading is in another document!

PiperOrigin-RevId: 305947971

Do not use std::result_of as it was removed in C++20.

PiperOrigin-RevId: 303783600

Google Test and Google Mock require matching versions to work,
so this requirement should be described in the pkgconfig files.

This change is derived from the one used for the Fedora gtest package.

Signed-off-by: Neal Gompa <ngompa13@gmail.com>

Internal change

PiperOrigin-RevId: 302048013

Add tests checking that ::testing::MockFunction template argument can
be deduced in a function call context. This is a property raised in the
review, however, not checked before by any tests.

Use a polymorphic matcher instead of the GreaterThan<int> test matcher
to fix the sign-comparison warning on MSVC.

PiperOrigin-RevId: 301163657

Internal change

PiperOrigin-RevId: 299345492

Remove public buganizer reference from googletest cookbook.

It also seems that this bug is obsolete.

PiperOrigin-RevId: 298598298

Relax the implementation of MatcherCast to allow conversion of `Matcher<T>` to
`Matcher<const T&>`. They have the same match signature.

PiperOrigin-RevId: 297115843

Allow construction of an Action from a callable of zero args

Action already allows construction from a callable with the same args as the mocked function, without needing to wrap the callable in Invoke. However, if you don't care about the arguments to the mocked function you need to either accept all of them or wrap your callable in InvokeWithoutArgs. This change makes both of those unnecessary, since it allows you to pass a no-args callable to Action directly.

PiperOrigin-RevId: 296117034

Add gmock Matcher<std::string_view> specialization.

PiperOrigin-RevId: 294443240

Fix gmock_gen to use MOCK_METHOD instead of old style macros.  Fix several
related bugs in argument parsing and return types.
- handle commas more correctly in return types
- handle commas correctly in arguments
- handle default values more correctly

PiperOrigin-RevId: 294435093

Fix gmock_gen to use MOCK_METHOD instead of old style macros.

PiperOrigin-RevId: 294360947

Fix gmock_gen to use MOCK_METHOD instead of old style macros.

PiperOrigin-RevId: 294332975

Get rid of gmock-generated-matchers.h and gmock-generated-matchers.h.pump.

Stop using pump for MATCHER* macroses generation.

PiperOrigin-RevId: 293878808

Tag the function generated by MATCHER with GTEST_ATTRIBUTE_UNUSED_ to fix CI builds of gmock-matchers_test.cc vs. -Wunused-function.

See https://github.com/google/googletest/pull/2697 for breakage.

PiperOrigin-RevId: 293669752

Get rid of gmock-generated-function-mockers.h and
gmock-generated-function-mockers.h.pump.

Stop using pump for GMOCK_METHOD* macroses generation.

PiperOrigin-RevId: 293454519

...text exposed to GitHub repo https://www.github.com/google/googletest

PiperOrigin-RevId: 293438092

Pass method's parameters count to internal GMOCK_METHOD* macro.

This will help removing copypaste in every GMOCK_METHOD* macro in future.

PiperOrigin-RevId: 292932554

Fix std::move to std::forward where appropriate to support reference types.

PiperOrigin-RevId: 292923058

Fix use of reserved names.
Minimize code duplication needed for explict-vs-nonexplicit constructor.

PiperOrigin-RevId: 292555014

Add includes for type_traits and utility to gmock-function-mocker.h: macros in the file require these headers.

PiperOrigin-RevId: 291782497

Create implementation macroses for matchers to move variadic parameters to the
end of parameters list.

To save backward compatibility, old macroses will be still taking `description`
parameter as the last one. But they will use INTERNAL macro that takes
`description` as the second parameter.

PiperOrigin-RevId: 291724469

Move part of functionality of Matcher* class to the base one. Reduce copypaste.

Make constructor and conversion operator of Matcher* class independent of pump.

PiperOrigin-RevId: 291405510

Add missing explicit keyword for gmock_Impl constructor.

When switching to using GMOCK_PP in ACTION* macroses `explicit` keyword was
missed in gmock_Impl constructor causing ClangTidy warnings in ACTION_P macro.

PiperOrigin-RevId: 291159975

Allow copying of the string in MatchAndExplain.

Otherwise, conversions from std::string_view to std::string will fail as being
explicit

PiperOrigin-RevId: 290301103