//
// Copyright (c) 2021 Peter Dimov
// Copyright (c) 2021 Vinnie Falco (vinnie.falco@gmail.com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/json
//

#ifndef BOOST_JSON_PARSE_INTO_HPP
#define BOOST_JSON_PARSE_INTO_HPP

#include <boost/json/detail/config.hpp>

#include <boost/json/basic_parser.hpp>
#include <boost/json/string_view.hpp>
#include <boost/json/detail/parse_into.hpp>
#include <boost/system/result.hpp>

namespace boost {
namespace json {

/** @ref basic_parser that parses into a given type.

    This is an alias template for @ref basic_parser instantiations that use
    a dedicated handler that parses directly into an object provided by the
    user instead of creating a @ref value.

    Objects of type `parser_for<T>` have constructor signature equivalent to
    `parser_for( parse_options const&, T* )`.

    @tparam T the type to parse into. This type must be
    {req_DefaultConstructible}.
*/
template< class T >
using parser_for =
#ifndef BOOST_JSON_DOCS
    basic_parser<detail::into_handler<T>>;
#else
    __see_below__;
#endif

/** Parse a JSON text into a user-defined object.

    This function parses a string and fills an object provided by the user.
    If the buffer does not contain a complete serialized JSON text, an error
    occurs. In this case `v` may be partially filled. Overloads
    __(1)__--**(3)** consume the entire string `s`. Overloads **(4)**--**(6)**
    read characters from the input stream `is`. All overloads consume all
    available characters, and produce an error if there are non-whitespace
    characters after the initial JSON.

    The function supports default constructible types satisfying
    {req_SequenceContainer}, arrays, arithmetic types, `bool`, `std::tuple`,
    `std::pair`, `std::optional`, `std::variant`, `std::nullptr_t`, and structs
    and enums described using Boost.Describe.

    @par Complexity
    @li **(1)**--**(3)** linear in `sv.size()`.
    @li **(4)**--**(6)** linear in the size of consumed input.

    @par Exception Safety
    Basic guarantee. Calls to `memory_resource::allocate` may throw. Overloads
    __(3)__ and **(6)** throw @ref boost::system::system_error on error.
    The stream `is` may throw as described by @ref std::ios::exceptions.

    @param v The type to parse into.
    @param sv The string to parse.
    @param ec Set to the error, if any occurred.
    @param opt The options for the parser. If this parameter is omitted, the
           parser will accept only standard JSON.

    @{
*/
template<class V>
void
parse_into(
    V& v,
    string_view sv,
    system::error_code& ec,
    parse_options const& opt = {} );

template<class V>
void
parse_into(
    V& v,
    string_view sv,
    std::error_code& ec,
    parse_options const& opt = {} );

/// Overload
template<class V>
void
parse_into(
    V& v,
    string_view sv,
    parse_options const& opt = {} );

/** Overload

    @param is The stream to read from.
    @param v
    @param ec
    @param opt
*/
template<class V>
void
parse_into(
    V& v,
    std::istream& is,
    system::error_code& ec,
    parse_options const& opt = {} );

/// Overload
template<class V>
void
parse_into(
    V& v,
    std::istream& is,
    std::error_code& ec,
    parse_options const& opt = {} );

/// Overload
template<class V>
void
parse_into(
    V& v,
    std::istream& is,
    parse_options const& opt = {} );
/// @}

} // namespace boost
} // namespace json

#include <boost/json/impl/parse_into.hpp>

#endif