191 lines
6.2 KiB
C++
191 lines
6.2 KiB
C++
// Copyright 2008 Google Inc.
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// All Rights Reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Type utilities needed for implementing typed and type-parameterized
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// tests.
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// IWYU pragma: private, include "gtest/gtest.h"
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// IWYU pragma: friend gtest/.*
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// IWYU pragma: friend gmock/.*
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#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
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#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
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#include <string>
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#include <type_traits>
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#include <typeinfo>
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#include "gtest/internal/gtest-port.h"
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// #ifdef __GNUC__ is too general here. It is possible to use gcc without using
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// libstdc++ (which is where cxxabi.h comes from).
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#if GTEST_HAS_CXXABI_H_
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#include <cxxabi.h>
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#elif defined(__HP_aCC)
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#include <acxx_demangle.h>
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#endif // GTEST_HASH_CXXABI_H_
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namespace testing {
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namespace internal {
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// Canonicalizes a given name with respect to the Standard C++ Library.
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// This handles removing the inline namespace within `std` that is
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// used by various standard libraries (e.g., `std::__1`). Names outside
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// of namespace std are returned unmodified.
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inline std::string CanonicalizeForStdLibVersioning(std::string s) {
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static const char prefix[] = "std::__";
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if (s.compare(0, strlen(prefix), prefix) == 0) {
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std::string::size_type end = s.find("::", strlen(prefix));
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if (end != s.npos) {
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// Erase everything between the initial `std` and the second `::`.
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s.erase(strlen("std"), end - strlen("std"));
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}
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}
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return s;
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}
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#if GTEST_HAS_RTTI
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// GetTypeName(const std::type_info&) returns a human-readable name of type T.
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inline std::string GetTypeName(const std::type_info& type) {
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const char* const name = type.name();
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#if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
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int status = 0;
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// gcc's implementation of typeid(T).name() mangles the type name,
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// so we have to demangle it.
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#if GTEST_HAS_CXXABI_H_
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using abi::__cxa_demangle;
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#endif // GTEST_HAS_CXXABI_H_
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char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
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const std::string name_str(status == 0 ? readable_name : name);
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free(readable_name);
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return CanonicalizeForStdLibVersioning(name_str);
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#else
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return name;
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#endif // GTEST_HAS_CXXABI_H_ || __HP_aCC
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}
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#endif // GTEST_HAS_RTTI
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// GetTypeName<T>() returns a human-readable name of type T if and only if
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// RTTI is enabled, otherwise it returns a dummy type name.
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// NB: This function is also used in Google Mock, so don't move it inside of
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// the typed-test-only section below.
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template <typename T>
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std::string GetTypeName() {
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#if GTEST_HAS_RTTI
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return GetTypeName(typeid(T));
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#else
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return "<type>";
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#endif // GTEST_HAS_RTTI
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}
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// A unique type indicating an empty node
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struct None {};
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#define GTEST_TEMPLATE_ \
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template <typename T> \
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class
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// The template "selector" struct TemplateSel<Tmpl> is used to
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// represent Tmpl, which must be a class template with one type
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// parameter, as a type. TemplateSel<Tmpl>::Bind<T>::type is defined
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// as the type Tmpl<T>. This allows us to actually instantiate the
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// template "selected" by TemplateSel<Tmpl>.
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//
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// This trick is necessary for simulating typedef for class templates,
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// which C++ doesn't support directly.
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template <GTEST_TEMPLATE_ Tmpl>
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struct TemplateSel {
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template <typename T>
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struct Bind {
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typedef Tmpl<T> type;
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};
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};
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#define GTEST_BIND_(TmplSel, T) TmplSel::template Bind<T>::type
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template <GTEST_TEMPLATE_ Head_, GTEST_TEMPLATE_... Tail_>
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struct Templates {
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using Head = TemplateSel<Head_>;
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using Tail = Templates<Tail_...>;
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};
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template <GTEST_TEMPLATE_ Head_>
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struct Templates<Head_> {
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using Head = TemplateSel<Head_>;
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using Tail = None;
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};
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// Tuple-like type lists
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template <typename Head_, typename... Tail_>
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struct Types {
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using Head = Head_;
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using Tail = Types<Tail_...>;
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};
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template <typename Head_>
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struct Types<Head_> {
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using Head = Head_;
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using Tail = None;
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};
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// Helper metafunctions to tell apart a single type from types
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// generated by ::testing::Types
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template <typename... Ts>
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struct ProxyTypeList {
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using type = Types<Ts...>;
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};
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template <typename>
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struct is_proxy_type_list : std::false_type {};
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template <typename... Ts>
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struct is_proxy_type_list<ProxyTypeList<Ts...>> : std::true_type {};
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// Generator which conditionally creates type lists.
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// It recognizes if a requested type list should be created
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// and prevents creating a new type list nested within another one.
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template <typename T>
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struct GenerateTypeList {
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private:
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using proxy = typename std::conditional<is_proxy_type_list<T>::value, T,
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ProxyTypeList<T>>::type;
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public:
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using type = typename proxy::type;
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};
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} // namespace internal
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template <typename... Ts>
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using Types = internal::ProxyTypeList<Ts...>;
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} // namespace testing
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#endif // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
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