mirror of
https://github.com/matrix-construct/construct
synced 2024-07-04 17:48:35 +02:00
108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_JSON_VECTOR_H
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namespace ircd::json
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{
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struct vector;
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bool empty(const json::vector &);
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size_t size(const json::vector &);
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bool operator!(const json::vector &);
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}
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/// Interface for non-standard, non-delimited concatenations of objects
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///
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/// This class parses a "vector of objects" with a similar strategy and
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/// interface to that of json::array etc. The elements of the vector are
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/// JSON objects delimited only by their structure. This is primarily for
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/// test vectors and internal use and should not be used in public facing
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/// code.
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///
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/// As with json::array, the same stateless forward-iteration notice applies
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/// here. This object will not perform well for random access.
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///
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struct ircd::json::vector
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:string_view
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{
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struct const_iterator;
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using value_type = const object;
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using pointer = value_type *;
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using reference = value_type &;
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using iterator = const_iterator;
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using size_type = size_t;
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using difference_type = ptrdiff_t;
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const_iterator end() const;
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const_iterator begin() const;
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const_iterator find(size_t i) const;
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value_type at(const size_t &i) const;
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value_type operator[](const size_t &i) const;
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bool empty() const;
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operator bool() const;
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size_t count() const;
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size_t size() const;
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using string_view::string_view;
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};
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namespace ircd::json
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{
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bool operator==(const vector::const_iterator &, const vector::const_iterator &);
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bool operator!=(const vector::const_iterator &, const vector::const_iterator &);
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bool operator<=(const vector::const_iterator &, const vector::const_iterator &);
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bool operator>=(const vector::const_iterator &, const vector::const_iterator &);
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bool operator<(const vector::const_iterator &, const vector::const_iterator &);
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bool operator>(const vector::const_iterator &, const vector::const_iterator &);
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}
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struct ircd::json::vector::const_iterator
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{
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using value_type = const object;
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using pointer = value_type *;
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using reference = value_type &;
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using iterator = const_iterator;
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using size_type = size_t;
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using difference_type = ptrdiff_t;
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using iterator_category = std::forward_iterator_tag;
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protected:
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friend class vector;
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const char *start {nullptr};
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const char *stop {nullptr};
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object state;
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const_iterator(const char *const &start, const char *const &stop)
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:start{start}
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,stop{stop}
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{}
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public:
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value_type *operator->() const { return &state; }
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value_type &operator*() const { return *operator->(); }
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const_iterator &operator++();
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const_iterator() = default;
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friend bool operator==(const const_iterator &, const const_iterator &);
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friend bool operator!=(const const_iterator &, const const_iterator &);
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friend bool operator<=(const const_iterator &, const const_iterator &);
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friend bool operator>=(const const_iterator &, const const_iterator &);
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friend bool operator<(const const_iterator &, const const_iterator &);
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friend bool operator>(const const_iterator &, const const_iterator &);
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};
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