Danny Robson
34788756d2
GCC produces ODR error when including paths of the form './foo' and 'foo' in the same binary. Rather than managing duplication we just universally pick the absolute form over the relative form.
139 lines
3.8 KiB
C++
139 lines
3.8 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_VIEW_HPP
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#define __UTIL_VIEW_HPP
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#include "types/traits.hpp"
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#include <cstdlib>
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#include <ostream>
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#include <string>
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namespace util {
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template <typename T>
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struct view {
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public:
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using value_type = typename std::iterator_traits<remove_restrict_t<T>>::value_type;
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constexpr
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view (T first, T last) noexcept;
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template <typename K> constexpr explicit view ( K &klass);
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template <typename K> constexpr explicit view (const K &klass);
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constexpr T& begin (void) noexcept;
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constexpr T& end (void) noexcept;
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constexpr const T& begin (void) const noexcept;
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constexpr const T& end (void) const noexcept;
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constexpr const T& cbegin (void) const noexcept;
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constexpr const T& cend (void) const noexcept;
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constexpr T find (const value_type&) const noexcept;
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constexpr bool empty (void) const noexcept;
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constexpr size_t size (void) const noexcept;
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constexpr value_type& operator[] (size_t) noexcept;
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constexpr const value_type& operator[] (size_t) const noexcept;
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bool operator== (view) const noexcept;
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private:
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T m_begin;
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T m_end;
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};
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template <typename T, size_t N>
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auto
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make_view (const T (&)[N]);
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template <typename T>
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auto
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make_view (T&);
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template <typename T>
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auto
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make_view (const T&);
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template <typename T>
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auto
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make_view (T&&) = delete;
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template <typename T>
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auto
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make_cview (const T&);
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template <typename T>
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auto
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make_view (T first, T last)
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{
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return view<T> {first, last};
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}
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template <typename T>
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auto
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make_cview (T *first, T *last)
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{
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return view<const T*> {first, last};
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}
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// string conversions
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view<const char*> make_view (const char *str);
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view<char*> make_view (char *str);
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template <typename CharT, typename TraitsT, typename AllocT>
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view<const CharT*>
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make_view (const std::basic_string<CharT,TraitsT,AllocT>&);
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template <typename CharT, typename TraitsT, typename AllocT>
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view<CharT*>
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make_view (std::basic_string<CharT,TraitsT,AllocT>&);
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template <typename CharT, typename TraitsT, typename AllocT>
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view<const CharT*>
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make_view (const std::basic_string<CharT,TraitsT,AllocT>&&) = delete;
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template <typename CharT, typename TraitsT, typename AllocT>
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view<CharT*>
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make_view (std::basic_string<CharT,TraitsT,AllocT>&&) = delete;
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// boolean operationrs
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template <typename T>
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bool operator!= (view<T>, view<T>);
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bool operator== (const std::string&, view<const char*>);
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bool operator== (const std::string&, view<char*>);
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bool operator== (const std::string&, view<std::string::const_iterator>);
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bool operator== (const std::string&, view<std::string::iterator>);
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bool operator== (view<const char*>, const std::string&);
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bool operator== (view<char*>, const std::string&);
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bool operator== (view<std::string::const_iterator>, const std::string&);
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bool operator== (view<std::string::iterator>, const std::string&);
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template <typename T>
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std::ostream&
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operator<< (std::ostream&, view<T>);
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}
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#include "view.ipp"
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#endif
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