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Remove unused cast implementation

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PiperOrigin-RevId: 549456180
Change-Id: I10862e6de981087a5c590cccf6152255e9a176a0
This commit is contained in:
Derek Mauro 2023-07-19 16:21:08 -07:00 committed by Copybara-Service
parent d66ce58510
commit 1ed6a8c67a
1 changed files with 0 additions and 41 deletions
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41
googletest/include/gtest/internal/gtest-port.h
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@ -1146,47 +1146,6 @@ inline To ImplicitCast_(To x) {
return x; return x;
} }
// When you upcast (that is, cast a pointer from type Foo to type
// SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
// always succeed. When you downcast (that is, cast a pointer from
// type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
// how do you know the pointer is really of type SubclassOfFoo? It
// could be a bare Foo, or of type DifferentSubclassOfFoo. Thus,
// when you downcast, you should use this macro. In debug mode, we
// use dynamic_cast<> to double-check the downcast is legal (we die
// if it's not). In normal mode, we do the efficient static_cast<>
// instead. Thus, it's important to test in debug mode to make sure
// the cast is legal!
// This is the only place in the code we should use dynamic_cast<>.
// In particular, you SHOULDN'T be using dynamic_cast<> in order to
// do RTTI (eg code like this:
// if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
// if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
// You should design the code some other way not to need this.
//
// This relatively ugly name is intentional. It prevents clashes with
// similar functions users may have (e.g., down_cast). The internal
// namespace alone is not enough because the function can be found by ADL.
template <typename To, typename From> // use like this: DownCast_<T*>(foo);
inline To DownCast_(From* f) { // so we only accept pointers
// Ensures that To is a sub-type of From *. This test is here only
// for compile-time type checking, and has no overhead in an
// optimized build at run-time, as it will be optimized away
// completely.
GTEST_INTENTIONAL_CONST_COND_PUSH_()
if (false) {
GTEST_INTENTIONAL_CONST_COND_POP_()
const To to = nullptr;
::testing::internal::ImplicitCast_<From*>(to);
}
#if GTEST_HAS_RTTI
// RTTI: debug mode only!
GTEST_CHECK_(f == nullptr || dynamic_cast<To>(f) != nullptr);
#endif
return static_cast<To>(f);
}
// Downcasts the pointer of type Base to Derived. // Downcasts the pointer of type Base to Derived.
// Derived must be a subclass of Base. The parameter MUST // Derived must be a subclass of Base. The parameter MUST
// point to a class of type Derived, not any subclass of it. // point to a class of type Derived, not any subclass of it.