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Makes gmock work on Symbian (both 3rd & 5th editions), original patch contributed by Mika Raento.

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This commit is contained in:
zhanyong.wan
2009-09-25 18:55:50 +00:00
parent 2d970ee3ba
commit 95b12332c3
9 changed files with 185 additions and 92 deletions
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88
include/gmock/gmock-matchers.h
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@@ -320,47 +320,59 @@ inline PolymorphicMatcher<Impl> MakePolymorphicMatcher(const Impl& impl) {
template <typename T, typename M>
Matcher<T> MatcherCast(M m);
// TODO(vladl@google.com): Modify the implementation to reject casting
// Matcher<int> to Matcher<double>.
// Implements SafeMatcherCast().
//
// This overload handles polymorphic matchers only since monomorphic
// matchers are handled by the next one.
template <typename T, typename M>
inline Matcher<T> SafeMatcherCast(M polymorphic_matcher) {
return Matcher<T>(polymorphic_matcher);
}
// We use an intermediate class to do the actual safe casting as Nokia's
// Symbian compiler cannot decide between
// template <T, M> ... (M) and
// template <T, U> ... (const Matcher<U>&)
// for function templates but can for member function templates.
template <typename T>
class SafeMatcherCastImpl {
public:
// This overload handles polymorphic matchers only since monomorphic
// matchers are handled by the next one.
template <typename M>
static inline Matcher<T> Cast(M polymorphic_matcher) {
return Matcher<T>(polymorphic_matcher);
}
// This overload handles monomorphic matchers.
//
// In general, if type T can be implicitly converted to type U, we can
// safely convert a Matcher<U> to a Matcher<T> (i.e. Matcher is
// contravariant): just keep a copy of the original Matcher<U>, convert the
// argument from type T to U, and then pass it to the underlying Matcher<U>.
// The only exception is when U is a reference and T is not, as the
// underlying Matcher<U> may be interested in the argument's address, which
// is not preserved in the conversion from T to U.
template <typename T, typename U>
Matcher<T> SafeMatcherCast(const Matcher<U>& matcher) {
// Enforce that T can be implicitly converted to U.
GMOCK_COMPILE_ASSERT_((internal::ImplicitlyConvertible<T, U>::value),
T_must_be_implicitly_convertible_to_U);
// Enforce that we are not converting a non-reference type T to a reference
// type U.
GMOCK_COMPILE_ASSERT_(
internal::is_reference<T>::value || !internal::is_reference<U>::value,
cannot_convert_non_referentce_arg_to_reference);
// In case both T and U are arithmetic types, enforce that the
// conversion is not lossy.
typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(T)) RawT;
typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(U)) RawU;
const bool kTIsOther = GMOCK_KIND_OF_(RawT) == internal::kOther;
const bool kUIsOther = GMOCK_KIND_OF_(RawU) == internal::kOther;
GMOCK_COMPILE_ASSERT_(
kTIsOther || kUIsOther ||
(internal::LosslessArithmeticConvertible<RawT, RawU>::value),
conversion_of_arithmetic_types_must_be_lossless);
return MatcherCast<T>(matcher);
// This overload handles monomorphic matchers.
//
// In general, if type T can be implicitly converted to type U, we can
// safely convert a Matcher<U> to a Matcher<T> (i.e. Matcher is
// contravariant): just keep a copy of the original Matcher<U>, convert the
// argument from type T to U, and then pass it to the underlying Matcher<U>.
// The only exception is when U is a reference and T is not, as the
// underlying Matcher<U> may be interested in the argument's address, which
// is not preserved in the conversion from T to U.
template <typename U>
static inline Matcher<T> Cast(const Matcher<U>& matcher) {
// Enforce that T can be implicitly converted to U.
GMOCK_COMPILE_ASSERT_((internal::ImplicitlyConvertible<T, U>::value),
T_must_be_implicitly_convertible_to_U);
// Enforce that we are not converting a non-reference type T to a reference
// type U.
GMOCK_COMPILE_ASSERT_(
internal::is_reference<T>::value || !internal::is_reference<U>::value,
cannot_convert_non_referentce_arg_to_reference);
// In case both T and U are arithmetic types, enforce that the
// conversion is not lossy.
typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(T)) RawT;
typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(U)) RawU;
const bool kTIsOther = GMOCK_KIND_OF_(RawT) == internal::kOther;
const bool kUIsOther = GMOCK_KIND_OF_(RawU) == internal::kOther;
GMOCK_COMPILE_ASSERT_(
kTIsOther || kUIsOther ||
(internal::LosslessArithmeticConvertible<RawT, RawU>::value),
conversion_of_arithmetic_types_must_be_lossless);
return MatcherCast<T>(matcher);
}
};
template <typename T, typename M>
inline Matcher<T> SafeMatcherCast(const M& polymorphic_matcher) {
return SafeMatcherCastImpl<T>::Cast(polymorphic_matcher);
}
// A<T>() returns a matcher that matches any value of type T.