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BREAKING CHANGE: drops the old matcher API. See http://code.google.com/p/googlemock/wiki/FrequentlyAskedQuestions for details.

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This commit is contained in:
zhanyong.wan 2010-01-28 21:52:29 +00:00
parent 99643d2d1f
commit db22c22782
3 changed files with 114 additions and 241 deletions
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280
include/gmock/gmock-matchers.h
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@ -108,10 +108,7 @@ class MatcherInterface {
// Returns true iff the matcher matches x; also explains the match
// result to 'listener'.
//
// You should override this method when defining a new matcher. For
// backward compatibility, we provide a default implementation that
// just forwards to the old, deprecated matcher API (Matches() and
// ExplainMatchResultTo()).
// You should override this method when defining a new matcher.
//
// It's the responsibility of the caller (Google Mock) to guarantee
// that 'listener' is not NULL. This helps to simplify a matcher's
@ -119,19 +116,7 @@ class MatcherInterface {
// can talk to 'listener' without checking its validity first.
// However, in order to implement dummy listeners efficiently,
// listener->stream() may be NULL.
virtual bool MatchAndExplain(T x, MatchResultListener* listener) const {
const bool match = Matches(x);
if (listener->stream() != NULL) {
ExplainMatchResultTo(x, listener->stream());
}
return match;
}
// DEPRECATED. This method will be removed. Override
// MatchAndExplain() instead.
//
// Returns true iff the matcher matches x.
virtual bool Matches(T /* x */) const { return false; }
virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
// Describes this matcher to an ostream.
virtual void DescribeTo(::std::ostream* os) const = 0;
@ -147,18 +132,6 @@ class MatcherInterface {
DescribeTo(os);
*os << ")";
}
// DEPRECATED. This method will be removed. Override
// MatchAndExplain() instead.
//
// Explains why x matches, or doesn't match, the matcher. Override
// this to provide any additional information that helps a user
// understand the match result.
virtual void ExplainMatchResultTo(T /* x */, ::std::ostream* /* os */) const {
// By default, nothing more needs to be explained, as Google Mock
// has already printed the value of x when this function is
// called.
}
};
namespace internal {
@ -254,38 +227,6 @@ class MatcherBase {
::testing::internal::linked_ptr<const MatcherInterface<T> > impl_;
};
// The default implementation of ExplainMatchResultTo() for
// polymorphic matchers.
template <typename PolymorphicMatcherImpl, typename T>
inline void ExplainMatchResultTo(const PolymorphicMatcherImpl& /* impl */,
const T& /* x */,
::std::ostream* /* os */) {
// By default, nothing more needs to be said, as Google Mock already
// prints the value of x elsewhere.
}
// The default implementation of MatchAndExplain() for polymorphic
// matchers. The type of argument x cannot be const T&, in case
// impl.Matches() takes a non-const reference.
template <typename PolymorphicMatcherImpl, typename T>
inline bool MatchAndExplain(const PolymorphicMatcherImpl& impl,
T& x,
MatchResultListener* listener) {
const bool match = impl.Matches(x);
::std::ostream* const os = listener->stream();
if (os != NULL) {
using ::testing::internal::ExplainMatchResultTo;
// When resolving the following call, both
// ::testing::internal::ExplainMatchResultTo() and
// foo::ExplainMatchResultTo() are considered, where foo is the
// namespace where class PolymorphicMatcherImpl is defined.
ExplainMatchResultTo(impl, x, os);
}
return match;
}
} // namespace internal
// A Matcher<T> is a copyable and IMMUTABLE (except by assignment)
@ -350,29 +291,12 @@ class Matcher<internal::string>
// polymorphic matcher (i.e. a matcher that can match values of more
// than one type, e.g. Eq(n) and NotNull()).
//
// To define a polymorphic matcher in the old, deprecated way, a user
// first provides an Impl class that has a Matches() method, a
// DescribeTo() method, and a DescribeNegationTo() method. The
// Matches() method is usually a method template (such that it works
// with multiple types). Then the user creates the polymorphic
// matcher using MakePolymorphicMatcher(). To provide additional
// explanation to the match result, define a FREE function (or
// function template)
// To define a polymorphic matcher, a user should provide an Impl
// class that has a DescribeTo() method and a DescribeNegationTo()
// method, and define a member function (or member function template)
//
// void ExplainMatchResultTo(const Impl& matcher, const Value& value,
// ::std::ostream* os);
//
// in the SAME NAME SPACE where Impl is defined.
//
// The new, recommended way to define a polymorphic matcher is to
// provide an Impl class that has a DescribeTo() method and a
// DescribeNegationTo() method, and define a FREE function (or
// function template)
//
// bool MatchAndExplain(const Impl& matcher, const Value& value,
// MatchResultListener* listener);
//
// in the SAME NAME SPACE where Impl is defined.
// bool MatchAndExplain(const Value& value,
// MatchResultListener* listener) const;
//
// See the definition of NotNull() for a complete example.
template <class Impl>
@ -408,14 +332,7 @@ class PolymorphicMatcher {
}
virtual bool MatchAndExplain(T x, MatchResultListener* listener) const {
// C++ uses Argument-Dependent Look-up (aka Koenig Look-up) to
// resolve the call to MatchAndExplain() here. This means that
// if there's a MatchAndExplain() function defined in the name
// space where class Impl is defined, it will be picked by the
// compiler as the better match. Otherwise the default
// implementation of it in ::testing::internal will be picked.
using ::testing::internal::MatchAndExplain;
return MatchAndExplain(impl_, x, listener);
return impl_.MatchAndExplain(x, listener);
}
private:
@ -578,7 +495,7 @@ class TuplePrefix {
// We remove the reference in type Value to prevent the
// universal printer from printing the address of value, which
// isn't interesting to the user most of the time. The
// matcher's ExplainMatchResultTo() method handles the case when
// matcher's MatchAndExplain() method handles the case when
// the address is interesting.
internal::UniversalPrinter<GMOCK_REMOVE_REFERENCE_(Value)>::
Print(value, os);
@ -782,7 +699,10 @@ GMOCK_IMPLEMENT_COMPARISON_MATCHER_(Ne, !=, "not equal to");
class IsNullMatcher {
public:
template <typename Pointer>
bool Matches(const Pointer& p) const { return GetRawPointer(p) == NULL; }
bool MatchAndExplain(const Pointer& p,
MatchResultListener* /* listener */) const {
return GetRawPointer(p) == NULL;
}
void DescribeTo(::std::ostream* os) const { *os << "is NULL"; }
void DescribeNegationTo(::std::ostream* os) const {
@ -790,18 +710,15 @@ class IsNullMatcher {
}
};
template <typename Pointer>
bool MatchAndExplain(const IsNullMatcher& impl, Pointer& p,
MatchResultListener* /* listener */) {
return impl.Matches(p);
}
// Implements the polymorphic NotNull() matcher, which matches any raw or smart
// pointer that is not NULL.
class NotNullMatcher {
public:
template <typename Pointer>
bool Matches(const Pointer& p) const { return GetRawPointer(p) != NULL; }
bool MatchAndExplain(const Pointer& p,
MatchResultListener* /* listener */) const {
return GetRawPointer(p) != NULL;
}
void DescribeTo(::std::ostream* os) const { *os << "is not NULL"; }
void DescribeNegationTo(::std::ostream* os) const {
@ -809,12 +726,6 @@ class NotNullMatcher {
}
};
template <typename Pointer>
bool MatchAndExplain(const NotNullMatcher& impl, Pointer& p,
MatchResultListener* /* listener */) {
return impl.Matches(p);
}
// Ref(variable) matches any argument that is a reference to
// 'variable'. This matcher is polymorphic as it can match any
// super type of the type of 'variable'.
@ -860,8 +771,8 @@ class RefMatcher<T&> {
public:
explicit Impl(Super& x) : object_(x) {} // NOLINT
// Matches() takes a Super& (as opposed to const Super&) in
// order to match the interface MatcherInterface<Super&>.
// MatchAndExplain() takes a Super& (as opposed to const Super&)
// in order to match the interface MatcherInterface<Super&>.
virtual bool MatchAndExplain(
Super& x, MatchResultListener* listener) const {
*listener << "is located @" << static_cast<const void*>(&x);
@ -936,14 +847,16 @@ class StrEqualityMatcher {
// When expect_eq_ is true, returns true iff s is equal to string_;
// otherwise returns true iff s is not equal to string_.
bool Matches(ConstCharPointer s) const {
bool MatchAndExplain(ConstCharPointer s,
MatchResultListener* listener) const {
if (s == NULL) {
return !expect_eq_;
}
return Matches(StringType(s));
return MatchAndExplain(StringType(s), listener);
}
bool Matches(const StringType& s) const {
bool MatchAndExplain(const StringType& s,
MatchResultListener* /* listener */) const {
const bool eq = case_sensitive_ ? s == string_ :
CaseInsensitiveStringEquals(s, string_);
return expect_eq_ == eq;
@ -977,12 +890,6 @@ class StrEqualityMatcher {
GTEST_DISALLOW_ASSIGN_(StrEqualityMatcher);
};
template <typename StringType, typename T>
bool MatchAndExplain(const StrEqualityMatcher<StringType>& impl, T& s,
MatchResultListener* /* listener */) {
return impl.Matches(s);
}
// Implements the polymorphic HasSubstr(substring) matcher, which
// can be used as a Matcher<T> as long as T can be converted to a
// string.
@ -997,11 +904,13 @@ class HasSubstrMatcher {
// These overloaded methods allow HasSubstr(substring) to be used as a
// Matcher<T> as long as T can be converted to string. Returns true
// iff s contains substring_ as a substring.
bool Matches(ConstCharPointer s) const {
return s != NULL && Matches(StringType(s));
bool MatchAndExplain(ConstCharPointer s,
MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(StringType(s), listener);
}
bool Matches(const StringType& s) const {
bool MatchAndExplain(const StringType& s,
MatchResultListener* /* listener */) const {
return s.find(substring_) != StringType::npos;
}
@ -1022,12 +931,6 @@ class HasSubstrMatcher {
GTEST_DISALLOW_ASSIGN_(HasSubstrMatcher);
};
template <typename StringType, typename T>
bool MatchAndExplain(const HasSubstrMatcher<StringType>& impl, T& s,
MatchResultListener* /* listener */) {
return impl.Matches(s);
}
// Implements the polymorphic StartsWith(substring) matcher, which
// can be used as a Matcher<T> as long as T can be converted to a
// string.
@ -1042,11 +945,13 @@ class StartsWithMatcher {
// These overloaded methods allow StartsWith(prefix) to be used as a
// Matcher<T> as long as T can be converted to string. Returns true
// iff s starts with prefix_.
bool Matches(ConstCharPointer s) const {
return s != NULL && Matches(StringType(s));
bool MatchAndExplain(ConstCharPointer s,
MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(StringType(s), listener);
}
bool Matches(const StringType& s) const {
bool MatchAndExplain(const StringType& s,
MatchResultListener* /* listener */) const {
return s.length() >= prefix_.length() &&
s.substr(0, prefix_.length()) == prefix_;
}
@ -1067,12 +972,6 @@ class StartsWithMatcher {
GTEST_DISALLOW_ASSIGN_(StartsWithMatcher);
};
template <typename StringType, typename T>
bool MatchAndExplain(const StartsWithMatcher<StringType>& impl, T& s,
MatchResultListener* /* listener */) {
return impl.Matches(s);
}
// Implements the polymorphic EndsWith(substring) matcher, which
// can be used as a Matcher<T> as long as T can be converted to a
// string.
@ -1086,11 +985,13 @@ class EndsWithMatcher {
// These overloaded methods allow EndsWith(suffix) to be used as a
// Matcher<T> as long as T can be converted to string. Returns true
// iff s ends with suffix_.
bool Matches(ConstCharPointer s) const {
return s != NULL && Matches(StringType(s));
bool MatchAndExplain(ConstCharPointer s,
MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(StringType(s), listener);
}
bool Matches(const StringType& s) const {
bool MatchAndExplain(const StringType& s,
MatchResultListener* /* listener */) const {
return s.length() >= suffix_.length() &&
s.substr(s.length() - suffix_.length()) == suffix_;
}
@ -1111,12 +1012,6 @@ class EndsWithMatcher {
GTEST_DISALLOW_ASSIGN_(EndsWithMatcher);
};
template <typename StringType, typename T>
bool MatchAndExplain(const EndsWithMatcher<StringType>& impl, T& s,
MatchResultListener* /* listener */) {
return impl.Matches(s);
}
// Implements polymorphic matchers MatchesRegex(regex) and
// ContainsRegex(regex), which can be used as a Matcher<T> as long as
// T can be converted to a string.
@ -1129,11 +1024,13 @@ class MatchesRegexMatcher {
// a Matcher<T> as long as T can be converted to string. Returns
// true iff s matches regular expression regex. When full_match_ is
// true, a full match is done; otherwise a partial match is done.
bool Matches(const char* s) const {
return s != NULL && Matches(internal::string(s));
bool MatchAndExplain(const char* s,
MatchResultListener* listener) const {
return s != NULL && MatchAndExplain(internal::string(s), listener);
}
bool Matches(const internal::string& s) const {
bool MatchAndExplain(const internal::string& s,
MatchResultListener* /* listener */) const {
return full_match_ ? RE::FullMatch(s, *regex_) :
RE::PartialMatch(s, *regex_);
}
@ -1157,12 +1054,6 @@ class MatchesRegexMatcher {
GTEST_DISALLOW_ASSIGN_(MatchesRegexMatcher);
};
template <typename T>
bool MatchAndExplain(const MatchesRegexMatcher& impl, T& s,
MatchResultListener* /* listener */) {
return impl.Matches(s);
}
// Implements a matcher that compares the two fields of a 2-tuple
// using one of the ==, <=, <, etc, operators. The two fields being
// compared don't have to have the same type.
@ -1438,7 +1329,8 @@ class TrulyMatcher {
// argument is passed by reference as the predicate may be
// interested in the address of the argument.
template <typename T>
bool Matches(T& x) const { // NOLINT
bool MatchAndExplain(T& x, // NOLINT
MatchResultListener* /* listener */) const {
#if GTEST_OS_WINDOWS
// MSVC warns about converting a value into bool (warning 4800).
#pragma warning(push) // Saves the current warning state.
@ -1464,12 +1356,6 @@ class TrulyMatcher {
GTEST_DISALLOW_ASSIGN_(TrulyMatcher);
};
template <typename Predicate, typename T>
bool MatchAndExplain(const TrulyMatcher<Predicate>& impl, T& x,
MatchResultListener* /* listener */) {
return impl.Matches(x);
}
// Used for implementing Matches(matcher), which turns a matcher into
// a predicate.
template <typename M>
@ -1744,11 +1630,20 @@ class FieldMatcher {
matcher_.DescribeNegationTo(os);
}
// The first argument of MatchAndExplain() is needed to help
template <typename T>
bool MatchAndExplain(const T& value, MatchResultListener* listener) const {
return MatchAndExplainImpl(
typename ::testing::internal::
is_pointer<GMOCK_REMOVE_CONST_(T)>::type(),
value, listener);
}
private:
// The first argument of MatchAndExplainImpl() is needed to help
// Symbian's C++ compiler choose which overload to use. Its type is
// true_type iff the Field() matcher is used to match a pointer.
bool MatchAndExplain(false_type /* is_not_pointer */, const Class& obj,
MatchResultListener* listener) const {
bool MatchAndExplainImpl(false_type /* is_not_pointer */, const Class& obj,
MatchResultListener* listener) const {
StringMatchResultListener inner_listener;
const bool match = matcher_.MatchAndExplain(obj.*field_, &inner_listener);
const internal::string s = inner_listener.str();
@ -1758,32 +1653,23 @@ class FieldMatcher {
return match;
}
bool MatchAndExplain(true_type /* is_pointer */, const Class* p,
MatchResultListener* listener) const {
bool MatchAndExplainImpl(true_type /* is_pointer */, const Class* p,
MatchResultListener* listener) const {
if (p == NULL)
return false;
// Since *p has a field, it must be a class/struct/union type and
// thus cannot be a pointer. Therefore we pass false_type() as
// the first argument.
return MatchAndExplain(false_type(), *p, listener);
return MatchAndExplainImpl(false_type(), *p, listener);
}
private:
const FieldType Class::*field_;
const Matcher<const FieldType&> matcher_;
GTEST_DISALLOW_ASSIGN_(FieldMatcher);
};
template <typename Class, typename FieldType, typename T>
bool MatchAndExplain(const FieldMatcher<Class, FieldType>& matcher,
T& value, MatchResultListener* listener) {
return matcher.MatchAndExplain(
typename ::testing::internal::is_pointer<GMOCK_REMOVE_CONST_(T)>::type(),
value, listener);
}
// Implements the Property() matcher for matching a property
// (i.e. return value of a getter method) of an object.
template <typename Class, typename PropertyType>
@ -1809,11 +1695,20 @@ class PropertyMatcher {
matcher_.DescribeNegationTo(os);
}
// The first argument of MatchAndExplain() is needed to help
template <typename T>
bool MatchAndExplain(const T&value, MatchResultListener* listener) const {
return MatchAndExplainImpl(
typename ::testing::internal::
is_pointer<GMOCK_REMOVE_CONST_(T)>::type(),
value, listener);
}
private:
// The first argument of MatchAndExplainImpl() is needed to help
// Symbian's C++ compiler choose which overload to use. Its type is
// true_type iff the Property() matcher is used to match a pointer.
bool MatchAndExplain(false_type /* is_not_pointer */, const Class& obj,
MatchResultListener* listener) const {
bool MatchAndExplainImpl(false_type /* is_not_pointer */, const Class& obj,
MatchResultListener* listener) const {
StringMatchResultListener inner_listener;
const bool match = matcher_.MatchAndExplain((obj.*property_)(),
&inner_listener);
@ -1824,32 +1719,23 @@ class PropertyMatcher {
return match;
}
bool MatchAndExplain(true_type /* is_pointer */, const Class* p,
MatchResultListener* listener) const {
bool MatchAndExplainImpl(true_type /* is_pointer */, const Class* p,
MatchResultListener* listener) const {
if (p == NULL)
return false;
// Since *p has a property method, it must be a class/struct/union
// type and thus cannot be a pointer. Therefore we pass
// false_type() as the first argument.
return MatchAndExplain(false_type(), *p, listener);
return MatchAndExplainImpl(false_type(), *p, listener);
}
private:
PropertyType (Class::*property_)() const;
const Matcher<RefToConstProperty> matcher_;
GTEST_DISALLOW_ASSIGN_(PropertyMatcher);
};
template <typename Class, typename PropertyType, typename T>
bool MatchAndExplain(const PropertyMatcher<Class, PropertyType>& matcher,
T& value, MatchResultListener* listener) {
return matcher.MatchAndExplain(
typename ::testing::internal::is_pointer<GMOCK_REMOVE_CONST_(T)>::type(),
value, listener);
}
// Type traits specifying various features of different functors for ResultOf.
// The default template specifies features for functor objects.
// Functor classes have to typedef argument_type and result_type
@ -1947,13 +1833,6 @@ class ResultOfMatcher {
GTEST_DISALLOW_ASSIGN_(ResultOfMatcher);
};
// Explains the result of matching a value against a functor matcher.
template <typename T, typename Callable>
void ExplainMatchResultTo(const ResultOfMatcher<Callable>& matcher,
T obj, ::std::ostream* os) {
matcher.ExplainMatchResultTo(obj, os);
}
// Implements an equality matcher for any STL-style container whose elements
// support ==. This matcher is like Eq(), but its failure explanations provide
// more detailed information that is useful when the container is used as a set.
@ -2048,13 +1927,6 @@ class ContainerEqMatcher {
GTEST_DISALLOW_ASSIGN_(ContainerEqMatcher);
};
template <typename LhsContainer, typename Container>
bool MatchAndExplain(const ContainerEqMatcher<Container>& matcher,
LhsContainer& lhs,
MatchResultListener* listener) {
return matcher.MatchAndExplain(lhs, listener);
}
// Implements Contains(element_matcher) for the given argument type Container.
template <typename Container>
class ContainsMatcherImpl : public MatcherInterface<Container> {

14
test/gmock-generated-matchers_test.cc
View File

@ -68,6 +68,7 @@ using testing::Lt;
using testing::MakeMatcher;
using testing::Matcher;
using testing::MatcherInterface;
using testing::MatchResultListener;
using testing::Ne;
using testing::Not;
using testing::Pointee;
@ -217,21 +218,22 @@ class GreaterThanMatcher : public MatcherInterface<int> {
public:
explicit GreaterThanMatcher(int rhs) : rhs_(rhs) {}
virtual bool Matches(int lhs) const { return lhs > rhs_; }
virtual void DescribeTo(::std::ostream* os) const {
*os << "is greater than " << rhs_;
}
virtual void ExplainMatchResultTo(int lhs, ::std::ostream* os) const {
virtual bool MatchAndExplain(int lhs,
MatchResultListener* listener) const {
const int diff = lhs - rhs_;
if (diff > 0) {
*os << "is " << diff << " more than " << rhs_;
*listener << "is " << diff << " more than " << rhs_;
} else if (diff == 0) {
*os << "is the same as " << rhs_;
*listener << "is the same as " << rhs_;
} else {
*os << "is " << -diff << " less than " << rhs_;
*listener << "is " << -diff << " less than " << rhs_;
}
return lhs > rhs_;
}
private:

61
test/gmock-matchers_test.cc
View File

@ -135,21 +135,22 @@ class GreaterThanMatcher : public MatcherInterface<int> {
public:
explicit GreaterThanMatcher(int rhs) : rhs_(rhs) {}
virtual bool Matches(int lhs) const { return lhs > rhs_; }
virtual void DescribeTo(::std::ostream* os) const {
*os << "is greater than " << rhs_;
}
virtual void ExplainMatchResultTo(int lhs, ::std::ostream* os) const {
virtual bool MatchAndExplain(int lhs,
MatchResultListener* listener) const {
const int diff = lhs - rhs_;
if (diff > 0) {
*os << "is " << diff << " more than " << rhs_;
*listener << "is " << diff << " more than " << rhs_;
} else if (diff == 0) {
*os << "is the same as " << rhs_;
*listener << "is the same as " << rhs_;
} else {
*os << "is " << -diff << " less than " << rhs_;
*listener << "is " << -diff << " less than " << rhs_;
}
return lhs > rhs_;
}
private:
@ -188,7 +189,10 @@ string Explain(const MatcherType& m, const Value& x) {
// change.
class EvenMatcherImpl : public MatcherInterface<int> {
public:
virtual bool Matches(int x) const { return x % 2 == 0; }
virtual bool MatchAndExplain(int x,
MatchResultListener* /* listener */) const {
return x % 2 == 0;
}
virtual void DescribeTo(::std::ostream* os) const {
*os << "is an even number";
@ -330,7 +334,8 @@ const int bar = 1;
class ReferencesBarOrIsZeroImpl {
public:
template <typename T>
bool Matches(const T& x) const {
bool MatchAndExplain(const T& x,
MatchResultListener* /* listener */) const {
const void* p = &x;
return p == &bar || x == 0;
}
@ -373,20 +378,19 @@ class PolymorphicIsEvenImpl {
void DescribeNegationTo(::std::ostream* os) const {
*os << "is odd";
}
};
template <typename T>
bool MatchAndExplain(const PolymorphicIsEvenImpl& /* impl */,
T x, MatchResultListener* listener) {
// Verifies that we can stream to the listener directly.
*listener << "% " << 2;
if (listener->stream() != NULL) {
// Verifies that we can stream to the listener's underlying stream
// too.
*listener->stream() << " == " << (x % 2);
template <typename T>
bool MatchAndExplain(const T& x, MatchResultListener* listener) const {
// Verifies that we can stream to the listener directly.
*listener << "% " << 2;
if (listener->stream() != NULL) {
// Verifies that we can stream to the listener's underlying stream
// too.
*listener->stream() << " == " << (x % 2);
}
return (x % 2) == 0;
}
return (x % 2) == 0;
}
};
PolymorphicMatcher<PolymorphicIsEvenImpl> PolymorphicIsEven() {
return MakePolymorphicMatcher(PolymorphicIsEvenImpl());
@ -2135,8 +2139,8 @@ TEST(MatcherAssertionTest, WorksForByRefArguments) {
// ASSERT_THAT("hello", starts_with_he) fails to compile with Nokia's
// Symbian compiler: it tries to compile
// template<T, U> class MatcherCastImpl { ...
// virtual bool Matches(T x) const {
// return source_matcher_.Matches(static_cast<U>(x));
// virtual bool MatchAndExplain(T x, ...) const {
// return source_matcher_.MatchAndExplain(static_cast<U>(x), ...);
// with U == string and T == const char*
// With ASSERT_THAT("hello"...) changed to ASSERT_THAT(string("hello") ... )
// the compiler silently crashes with no output.
@ -3075,8 +3079,11 @@ class DivisibleByImpl {
public:
explicit DivisibleByImpl(int a_divider) : divider_(a_divider) {}
// For testing using ExplainMatchResultTo() with polymorphic matchers.
template <typename T>
bool Matches(const T& n) const {
bool MatchAndExplain(const T& n, MatchResultListener* listener) const {
*listener << "is " << (n % divider_) << " modulo "
<< divider_;
return (n % divider_) == 0;
}
@ -3095,14 +3102,6 @@ class DivisibleByImpl {
int divider_;
};
// For testing using ExplainMatchResultTo() with polymorphic matchers.
template <typename T>
void ExplainMatchResultTo(const DivisibleByImpl& impl, const T& n,
::std::ostream* os) {
*os << "is " << (n % impl.divider()) << " modulo "
<< impl.divider();
}
PolymorphicMatcher<DivisibleByImpl> DivisibleBy(int n) {
return MakePolymorphicMatcher(DivisibleByImpl(n));
}