mirror of
https://github.com/catchorg/Catch2.git
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322 lines
8.9 KiB
C++
322 lines
8.9 KiB
C++
/*
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* Created by Phil on 8/5/2012.
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* Copyright 2012 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef TWOBLUECUBES_CATCH_TOSTRING_H_INCLUDED
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#define TWOBLUECUBES_CATCH_TOSTRING_H_INCLUDED
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#include "catch_common.h"
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#include <sstream>
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#include <iomanip>
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#include <limits>
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#include <vector>
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#include <cstddef>
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#ifdef __OBJC__
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#include "catch_objc_arc.hpp"
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#endif
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#include <tuple>
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#include <type_traits>
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#include <string>
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// We need a dummy global operator<< so we can bring it into Catch namespace later
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struct Catch_global_namespace_dummy;
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std::ostream& operator<<(std::ostream&, Catch_global_namespace_dummy);
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namespace Catch {
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// Bring in operator<< from global namespace into Catch namespace
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using ::operator<<;
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namespace Detail {
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std::string rawMemoryToString( const void *object, std::size_t size );
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template<typename T>
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std::string rawMemoryToString( const T& object ) {
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return rawMemoryToString( &object, sizeof(object) );
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}
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template<typename T>
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class IsStreamInsertable {
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template<typename SS, typename TT>
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static auto test(int)
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-> decltype(std::declval<SS&>() << std::declval<TT>(), std::true_type());
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template<typename, typename>
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static auto test(...)->std::false_type;
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public:
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static const bool value = decltype(test<std::ostream, const T&>(0))::value;
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};
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} // namespace Detail
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// If we decide for C++14, change these to enable_if_ts
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template <typename T>
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struct StringMaker {
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template <typename Fake = T>
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static
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typename std::enable_if<::Catch::Detail::IsStreamInsertable<Fake>::value, std::string>::type
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convert(const Fake& t) {
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std::stringstream sstr;
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sstr << t;
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return sstr.str();
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}
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template <typename Fake = T>
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static
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typename std::enable_if<!::Catch::Detail::IsStreamInsertable<Fake>::value, std::string>::type
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convert(const Fake&) {
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return "{?}";
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}
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};
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namespace Detail {
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extern const std::string unprintableString;
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// This function dispatches all stringification requests inside of Catch.
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// Should be preferably called fully qualified, like ::Catch::Detail::stringify
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template <typename T>
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std::string stringify(const T& e) {
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return ::Catch::StringMaker<typename std::remove_cv<typename std::remove_reference<T>::type>::type>::convert(e);
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}
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} // namespace Detail
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// Some predefined specializations
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template<>
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struct StringMaker<std::string> {
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static std::string convert(const std::string& str);
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};
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template<>
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struct StringMaker<std::wstring> {
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static std::string convert(const std::wstring& wstr);
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};
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template<>
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struct StringMaker<char const *> {
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static std::string convert(char const * str);
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};
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template<>
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struct StringMaker<char *> {
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static std::string convert(char * str);
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};
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template<>
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struct StringMaker<wchar_t const *> {
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static std::string convert(wchar_t const * str);
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};
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template<>
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struct StringMaker<wchar_t *> {
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static std::string convert(wchar_t * str);
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};
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template<int SZ>
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struct StringMaker<char[SZ]> {
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static std::string convert(const char* str) {
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return ::Catch::Detail::stringify(std::string{ str });
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}
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};
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template<int SZ>
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struct StringMaker<signed char[SZ]> {
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static std::string convert(const char* str) {
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return ::Catch::Detail::stringify(std::string{ str });
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}
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};
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template<int SZ>
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struct StringMaker<unsigned char[SZ]> {
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static std::string convert(const char* str) {
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return ::Catch::Detail::stringify(std::string{ str });
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}
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};
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template<>
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struct StringMaker<int> {
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static std::string convert(int value);
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};
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template<>
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struct StringMaker<long> {
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static std::string convert(long value);
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};
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template<>
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struct StringMaker<long long> {
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static std::string convert(long long value);
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};
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template<>
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struct StringMaker<unsigned int> {
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static std::string convert(unsigned int value);
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};
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template<>
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struct StringMaker<unsigned long> {
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static std::string convert(unsigned long value);
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};
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template<>
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struct StringMaker<unsigned long long> {
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static std::string convert(unsigned long long value);
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};
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template<>
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struct StringMaker<bool> {
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static std::string convert(bool b);
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};
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template<>
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struct StringMaker<char> {
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static std::string convert(char c);
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};
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template<>
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struct StringMaker<signed char> {
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static std::string convert(signed char c);
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};
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template<>
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struct StringMaker<unsigned char> {
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static std::string convert(unsigned char c);
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};
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template<>
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struct StringMaker<std::nullptr_t> {
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static std::string convert(std::nullptr_t);
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};
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template<>
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struct StringMaker<float> {
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static std::string convert(float value);
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};
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template<>
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struct StringMaker<double> {
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static std::string convert(double value);
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};
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template <typename T>
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struct StringMaker<T*> {
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template <typename U>
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static std::string convert(U* p) {
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if (p) {
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return ::Catch::Detail::rawMemoryToString(p);
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} else {
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return "nullptr";
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}
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}
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};
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template <typename R, typename C>
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struct StringMaker<R C::*> {
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static std::string convert(R C::* p) {
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if (p) {
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return ::Catch::Detail::rawMemoryToString(p);
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} else {
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return "nullptr";
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}
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}
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};
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namespace Detail {
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template<typename InputIterator>
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std::string rangeToString(InputIterator first, InputIterator last) {
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std::ostringstream oss;
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oss << "{ ";
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if (first != last) {
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oss << ::Catch::Detail::stringify(*first);
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for (++first; first != last; ++first)
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oss << ", " << ::Catch::Detail::stringify(*first);
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}
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oss << " }";
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return oss.str();
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}
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}
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template<typename T, typename Allocator>
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struct StringMaker<std::vector<T, Allocator> > {
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static std::string convert( std::vector<T,Allocator> const& v ) {
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return ::Catch::Detail::rangeToString( v.begin(), v.end() );
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}
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};
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// === Pair ===
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template<typename T1, typename T2>
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struct StringMaker<std::pair<T1, T2> > {
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static std::string convert(const std::pair<T1, T2>& pair) {
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std::ostringstream oss;
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oss << "{ "
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<< ::Catch::Detail::stringify(pair.first)
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<< ", "
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<< ::Catch::Detail::stringify(pair.second)
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<< " }";
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return oss.str();
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}
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};
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namespace Detail {
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template<
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typename Tuple,
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std::size_t N = 0,
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bool = (N < std::tuple_size<Tuple>::value)
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>
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struct TupleElementPrinter {
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static void print(const Tuple& tuple, std::ostream& os) {
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os << (N ? ", " : " ")
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<< ::Catch::Detail::stringify(std::get<N>(tuple));
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TupleElementPrinter<Tuple, N + 1>::print(tuple, os);
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}
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};
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template<
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typename Tuple,
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std::size_t N
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>
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struct TupleElementPrinter<Tuple, N, false> {
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static void print(const Tuple&, std::ostream&) {}
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};
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}
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template<typename ...Types>
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struct StringMaker<std::tuple<Types...>> {
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static std::string convert(const std::tuple<Types...>& tuple) {
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std::ostringstream os;
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os << '{';
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Detail::TupleElementPrinter<std::tuple<Types...>>::print(tuple, os);
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os << " }";
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return os.str();
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}
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};
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template<typename T>
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struct EnumStringMaker {
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static std::string convert(const T& t) {
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return ::Catch::Detail::stringify(static_cast<typename std::underlying_type<T>::type>(t));
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}
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};
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#ifdef __OBJC__
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template<>
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struct StringMaker<NSString const *> {
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static std::string convert(NSString const* const& nsstring);
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};
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template<>
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struct StringMaker<NSString * CATCH_ARC_STRONG> {
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static std::string convert(NSString * CATCH_ARC_STRONG const& nsstring);
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};
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template<>
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struct StringMaker<NSObject *> {
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static std::string convert(NSObject* const& nsObject);
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};
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#endif
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} // namespace Catch
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#endif // TWOBLUECUBES_CATCH_TOSTRING_H_INCLUDED
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