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base/array_adapters.hpp
70 строк
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Sergey Yershov
Fix include path for base
23 сен 2015, 02:45
23 сен 2015, 02:45
1f90f0b
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#pragma once #include "base/assert.hpp" namespace detail { template <class T, class TPtr> class array_impl { protected: TPtr m_p; size_t m_size; public: typedef T value_type; typedef T const & const_reference; typedef T & reference; array_impl(TPtr p, size_t sz) : m_p(p), m_size(sz) {} T const & operator[](size_t i) const { ASSERT_LESS ( i, m_size, () ); return m_p[i]; } T const & back() const { ASSERT_GREATER ( m_size, 0, () ); return m_p[m_size-1]; } size_t size() const { return m_size; } bool empty() const { return (m_size == 0); } }; } template <class T> class array_read : public detail::array_impl<T, T const *> { public: array_read(T const * p, size_t sz) : detail::array_impl<T, T const *>(p, sz) { } }; template <class TCont> array_read<typename TCont::value_type> make_read_adapter(TCont const & cont) { return array_read<typename TCont::value_type>(cont.empty() ? 0 : &cont[0], cont.size()); } template <class T> class array_write : public detail::array_impl<T, T *> { size_t m_capacity; typedef detail::array_impl<T, T *> base_t; public: template <class TCont> explicit array_write(TCont & cont) : detail::array_impl<T, T *>(cont.empty() ? 0 : &cont[0], 0), m_capacity(cont.size()) { } void push_back(T const & t) { ASSERT_LESS ( base_t::m_size, m_capacity, () ); base_t::m_p[base_t::m_size++] = t; } };