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A few tests are examining code locations and looking af the resulting line
numbers to verify that GoogleTest shows those to users correctly. Some of those
locations change when clang-format is run. For those locations, I've wrapped
portions in:
// clang-format off
...
// clang-format on

There may be other locations that are currently not tickled by running
clang-format.

PiperOrigin-RevId: 434844712
Change-Id: I3a9f0a6f39eff741c576b6de389bef9b1d11139d

Add a 3-arg overload for ResultOf() matcher that takes a description string for better error messages.

PiperOrigin-RevId: 427598749
Change-Id: I8c7a5d7b2dde017641534f1c7eed8dd56c33e845

PiperOrigin-RevId: 418497526
Change-Id: Ie53c3c0810c10a32cbcb941e3ca1ee8fb1ddd9f9

Fix typo in gmock-matchers_test.cc: CanDescribeNegationOfExpectingOneElment => CanDescribeNegationOfExpectingOneElement

PiperOrigin-RevId: 409484263
Change-Id: I7448d6f04a9868602e0bc8dec40ea3eb63d3e387

This was deprecated by P0174 in C++17.

Ensure `.what()` is printed in `ThrowsMessage(...)` to address https://github.com/google/googletest/issues/3582

Closes #3582

PiperOrigin-RevId: 399462851

Introduce a new matcher for unescaping Base-64 strings to gmock.

PiperOrigin-RevId: 388471904

Add `Conditional` wrapper to gtest

This follows an initial proposal for an 'EqIff` matcher. `Conditional` was considered more precise as an EqIff() matcher may suffer from `Iff` not being universally understood.

PiperOrigin-RevId: 383407665

Introduce GTEST_FLAG_GET and GTEST_FLAG_SET macros.

PiperOrigin-RevId: 382808313

Implement 'Contains(e).Times(n)' matcher modifier which allows to test for arbitrary occurrences including absence with Times(0).

PiperOrigin-RevId: 382210276

Change Matcher<T> to allow binding an implementation by value directly:
 - Drop the requirement of MatcherInterface. Doing manual type erasure avoid
   extra layers in many cases.
 - Avoid the adaptor for `MatcherInterface<T>` and `MatcherInterface<const T&>` mismatch.
 - Use a small object optimization when possible. This makes things like
   `_` and `Eq(1)` really cheap and do not require memory allocations.
 - Migrate some matchers to the new model to speed them up and to test the new framework. More matchers to come in future changes.

PiperOrigin-RevId: 350580998

Introduce a new `Address` matcher to gmock.

PiperOrigin-RevId: 346344591

Add a `Pointer` matcher as an analog to `Pointee`.

Similar to `Pointee`, `Pointer` works with either raw or smart pointers and
allows creating a matcher like Pointer(Eq(foo)) for smart pointers.

PiperOrigin-RevId: 346164768

Disable a gmock matcher test under MSVC 2015 (version 14) and earlier.  It interacts badly with Windows structured exceptions in a way we do not have the resources to investigate.  This test passes under MSVC 2017 and SEH.

PiperOrigin-RevId: 345496734

GMock: Make Truly explain when it fails

I just wrote a test that had a matcher of the form
  Optional(AllOf(
    SomeMatcher,
    SomeOtherMatcher,
    Truly(SomePredicate)))

The predicate failed, the other two matchers succeeded, and I got a hard-to-interpret message saying that the value in the optional "didn't match". Didn't match what?

This change improves situations like that slightly by having Truly explain to its result listener when it fails. When there are multiple Trulys in an AllOf, there will be some ambiguity, but it will at least provide more information than right now.

PiperOrigin-RevId: 341105141

Add ::testing::FieldsAre matcher for objects that support get<> and structured bindings.
PiperOrigin-RevId: 337165285

This PR adds matchers that accept a callable and verify that when invoked, it throws an exception with the given type and properties.

Fixes #952

Move matchers' tests from *generated* to common files.

PiperOrigin-RevId: 320954068

Change string matchers, like HasSubstr, to accept `string_view` input if available.

PiperOrigin-RevId: 315726484

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.

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

PiperOrigin-RevId: 301163657

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

PiperOrigin-RevId: 297115843

Add gmock Matcher<std::string_view> specialization.

PiperOrigin-RevId: 294443240

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

PiperOrigin-RevId: 292555014

fix unit test failure on NoShortCircuitOnFailure and DetectsFlakyShortCircuit when GTEST_HAS_RTTI is 1

Use standard C++11 integer types in gtest-port.h.

Remove testing::internal::{Int,Uint}{32,64} in favor of types
guaranteed to be in <cstdint> since C++11.

Tests for built-in integer type coverage are switched from
{Int,Uint}64 to [unsigned] long long, which is guaranteed by
C++11 to exist and be at least 64-bit wide.

PiperOrigin-RevId: 281565263

Rolling forward IsNan() matcher with fixes in test for -Wconversion issues. Use
std::nanf and std::nanl where appropriate.
PiperOrigin-RevId: 275523003

Added IsNan matcher

PiperOrigin-RevId: 275473218

Added IsNan matcher

PiperOrigin-RevId: 275278634