Danny Robson
4310366987
the class is used in some constexpr parsing routines, so constexpr for many methods is required.
142 lines
3.3 KiB
C++
142 lines
3.3 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 Danny Robson <danny@nerdcruft.net>
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*/
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#ifdef __UTIL_VIEW_IPP
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#error
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#endif
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#define __UTIL_VIEW_IPP
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#include "debug.hpp"
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#include <iterator>
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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template <size_t S>
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constexpr
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util::view<T>::view (const value_type(&arr)[S]) noexcept:
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m_begin (arr),
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m_end (arr + S)
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{ ; }
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr
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util::view<T>::view (T _begin, T _end) noexcept:
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m_begin (_begin),
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m_end (_end)
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{ ; }
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr T
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util::view<T>::begin (void) const noexcept
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{
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return cbegin ();
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}
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr T
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util::view<T>::end (void) const noexcept
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{
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return cend ();
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}
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr T
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util::view<T>::cbegin (void) const noexcept
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{
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return m_begin;
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}
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr T
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util::view<T>::cend (void) const noexcept
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{
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return m_end;
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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constexpr T
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util::view<T>::find (value_type v) const noexcept
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{
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for (T i = cbegin (); i != cend (); ++i)
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if (*i == v)
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return i;
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return cend ();
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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constexpr bool
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util::view<T>::empty (void) const noexcept
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{
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return m_begin == m_end;
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}
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr size_t
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util::view<T>::size (void) const noexcept
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{
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return m_end - m_begin;
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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constexpr const typename util::view<T>::value_type&
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util::view<T>::operator[] (size_t idx) const noexcept
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{
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CHECK_LT (m_begin + idx, m_end);
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return m_begin[idx];
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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bool
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util::view<T>::operator== (const view<T> rhs) const noexcept
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{
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return rhs.m_begin == m_begin &&
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rhs.m_end == m_end;
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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std::ostream&
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util::operator<< (std::ostream &os, util::view<T> v)
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{
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std::copy (v.begin (), v.end (), std::ostream_iterator<char> (os));
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return os;
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}
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