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186 lines
9.2 KiB
C++
186 lines
9.2 KiB
C++
//
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// XToolsCommon.h
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// cpp_tests
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//
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// Created by jief on 25.04.20.
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// Copyright © 2020 JF Knudsen. All rights reserved.
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//
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#ifndef XToolsCommon_h
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#define XToolsCommon_h
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#ifdef __cplusplus
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struct _xtools__false_type {
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static constexpr bool value = false;
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bool v() const { return false; }
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};
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struct _xtools__true_type {
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static constexpr bool value = true;
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bool v() const { return true; }
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};
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/* make unsigned */
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template <class _Tp>
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struct _xtools__make_unsigned {};
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template <> struct _xtools__make_unsigned< char> {typedef unsigned char type;};
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template <> struct _xtools__make_unsigned< signed char> {typedef unsigned char type;};
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template <> struct _xtools__make_unsigned< unsigned char> {typedef unsigned char type;};
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template <> struct _xtools__make_unsigned< char16_t> {typedef char16_t type;};
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template <> struct _xtools__make_unsigned< char32_t> {typedef char32_t type;};
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#if WCHAR_MAX <= 0xFFFF
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template <> struct _xtools__make_unsigned< wchar_t> {typedef char16_t type;};
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#else
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template <> struct _xtools__make_unsigned< wchar_t> {typedef char32_t type;};
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#endif
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template <> struct _xtools__make_unsigned< short> {typedef unsigned short type;};
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template <> struct _xtools__make_unsigned< unsigned short> {typedef unsigned short type;};
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template <> struct _xtools__make_unsigned< int> {typedef unsigned int type;};
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template <> struct _xtools__make_unsigned< unsigned int> {typedef unsigned int type;};
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template <> struct _xtools__make_unsigned< long> {typedef unsigned long type;};
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template <> struct _xtools__make_unsigned< unsigned long> {typedef unsigned long type;};
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template <> struct _xtools__make_unsigned< long long> {typedef unsigned long long type;};
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template <> struct _xtools__make_unsigned<unsigned long long> {typedef unsigned long long type;};
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// is_integral
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template <class _Tp> struct _xtools__is_integral_st : public _xtools__false_type {};
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//template <> struct _xtools__is_integral_st<bool> : public _xtools__true_type {};
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//template <> struct _xtools__is_integral_st<char> : public _xtools__true_type {};
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//template <> struct _xtools__is_integral_st<signed char> : public _xtools__true_type {};
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//template <> struct _xtools__is_integral_st<unsigned char> : public _xtools__true_type {};
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//template <> struct _xtools__is_integral_st<wchar_t> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<short> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<unsigned short> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<int> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<unsigned int> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<long> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<unsigned long> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<long long> : public _xtools__true_type {};
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template <> struct _xtools__is_integral_st<unsigned long long> : public _xtools__true_type {};
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// is_char
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// Looks like I don't need to remove reference.
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// This : template<typename O, enable_if(is_char(O))>
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// void strcpy(O otherChar)
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// is still enabled if parameter is a char&
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template <class _Tp> struct _xtools__is_char_st : public _xtools__false_type {};
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template <> struct _xtools__is_char_st<char> : public _xtools__true_type {};
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template <> struct _xtools__is_char_st<signed char> : public _xtools__true_type {};
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template <> struct _xtools__is_char_st<unsigned char> : public _xtools__true_type {};
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template <> struct _xtools__is_char_st<char16_t> : public _xtools__true_type {};
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template <> struct _xtools__is_char_st<char32_t> : public _xtools__true_type {};
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template <> struct _xtools__is_char_st<wchar_t> : public _xtools__true_type {};
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//
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//// STRUCT TEMPLATE remove_reference
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//template<class _Ty>
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// struct remove_ref
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// { // remove reference
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// using type = _Ty;
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// };
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//
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//template<class _Ty>
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// struct remove_ref<_Ty&>
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// { // remove reference
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// using type = _Ty;
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// };
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// STRUCT TEMPLATE remove_const
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//template<class _Ty>
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// struct remove_const
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// { // remove const
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// typedef _Ty type;
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// };
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//
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//template<class _Ty>
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// struct remove_const<const _Ty>
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// { // remove const
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// typedef _Ty type;
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// };
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template< class T > struct _xtools__remove_ref { typedef T type; };
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template< class T > struct _xtools__remove_ref<T&> { typedef T type; };
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template< class T > struct _xtools__remove_const { typedef T type; };
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template< class T > struct _xtools__remove_const<const T> { typedef T type; };
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template< class T > struct _xtools__remove_const<const T&> { typedef T& type; };
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template< class T > struct _xtools__remove_const<const T*> { typedef T* type; };
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template< class T > struct _xtools__remove_const_ptr { typedef T type; };
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template< class T > struct _xtools__remove_const_ptr<const T> { typedef T type; };
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template< class T > struct _xtools__remove_const_ptr<T*> { typedef T type; };
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template< class T > struct _xtools__remove_const_ptr<const T*> { typedef T type; };
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template< class T, int n > struct _xtools__remove_const_ptr<T[n]> { typedef T type; };
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template< class T, int n > struct _xtools__remove_const_ptr<const T[n]> { typedef T type; };
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// is_char_ptr
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template <class _Tp> struct _xtools__is_char_ptr_st : public _xtools__false_type {};
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template <> struct _xtools__is_char_ptr_st<char*> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<char[]> : public _xtools__true_type {};
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template <size_t _Np> struct _xtools__is_char_ptr_st<char[_Np]> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<signed char*> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<signed char[]> : public _xtools__true_type {};
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template <size_t _Np> struct _xtools__is_char_ptr_st<signed char[_Np]> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<unsigned char*> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<unsigned char[]> : public _xtools__true_type {};
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template <size_t _Np> struct _xtools__is_char_ptr_st<unsigned char[_Np]> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<char16_t*> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<char16_t[]> : public _xtools__true_type {};
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template <size_t _Np> struct _xtools__is_char_ptr_st<char16_t[_Np]> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<char32_t*> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<char32_t[]> : public _xtools__true_type {};
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template <size_t _Np> struct _xtools__is_char_ptr_st<char32_t[_Np]> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<wchar_t*> : public _xtools__true_type {};
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template <> struct _xtools__is_char_ptr_st<wchar_t[]> : public _xtools__true_type {};
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template <size_t _Np> struct _xtools__is_char_ptr_st<wchar_t[_Np]> : public _xtools__true_type {};
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/* enable_if */
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template <bool, typename T = void>
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struct _xtools_enable_if_t
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{};
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template <typename T>
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struct _xtools_enable_if_t<true, T> {
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typedef T type;
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};
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template< class... >
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using _xtools__void_t = void;
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/* has type member */
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// primary template handles types that have no nested ::type member:
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template< class, class = _xtools__void_t<> >
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struct _xtools__has_type_member : _xtools__false_type { };
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// specialization recognizes types that do have a nested ::type member:
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template< class T >
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struct _xtools__has_type_member<T, _xtools__void_t<typename T::char_t>> : _xtools__true_type { };
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#define remove_const(x) typename _xtools__remove_const<x>::type
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#define unsigned_type(x) typename _xtools__make_unsigned<remove_const(x)>::type
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#define remove_ref(x) typename _xtools__remove_ref<x>::type
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#define remove_const_ptr(x) typename _xtools__remove_const_ptr<x>::type
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#define is_integral(x) _xtools__is_integral_st<remove_const(x)>::value
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#define is_char(x) _xtools__is_char_st<remove_const(x)>::value
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#define is_char_ptr(x) _xtools__is_char_ptr_st<typename _xtools__remove_const<x>::type>::value
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#define enable_if_t(x) typename _xtools_enable_if_t<x>::type
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#define enable_if(x) typename enable_if_type = typename _xtools_enable_if_t<x>::type
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#endif // __cplusplus
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#endif /* XToolsCommon_h */
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