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//# This file is a part of toml++ and is subject to the the terms of the MIT license.
//# Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
//# See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
// SPDX-License-Identifier: MIT
#pragma once
#include "forward_declarations.hpp"
/// \cond
TOML_IMPL_NAMESPACE_START
{
template <typename T>
using parse_path_callback = bool(TOML_CALLCONV*)(void*, T);
TOML_NODISCARD
bool TOML_CALLCONV parse_path(std::string_view,
void*,
parse_path_callback<std::string_view>,
parse_path_callback<size_t>);
}
TOML_IMPL_NAMESPACE_END;
/// \endcond
TOML_NAMESPACE_START
{
/// \brief Returns a view of the node matching a fully-qualified "TOML path".
///
/// \detail \cpp
/// auto config = toml::parse(R"(
///
/// [foo]
/// bar = [ 0, 1, 2, [ 3 ], { kek = 4 } ]
///
/// )"sv);
///
/// std::cout << toml::at_path(config, "foo.bar[2]") << "\n";
/// std::cout << toml::at_path(config, "foo.bar[3][0]") << "\n";
/// std::cout << toml::at_path(config, "foo.bar[4].kek") << "\n";
/// \ecpp
///
/// \out
/// 2
/// 3
/// 4
/// \eout
///
///
/// \note Keys in paths are interpreted literally, so whitespace (or lack thereof) matters:
/// \cpp
/// toml::at_path(config, "foo.bar") // same as config["foo"]["bar"]
/// toml::at_path(config, "foo. bar") // same as config["foo"][" bar"]
/// toml::at_path(config, "foo..bar") // same as config["foo"][""]["bar"]
/// toml::at_path(config, ".foo.bar") // same as config[""]["foo"]["bar"]
/// \ecpp
/// <br>
/// Additionally, TOML allows '.' (period) characters to appear in keys if they are quoted strings.
/// This function makes no allowance for this, instead treating all period characters as sub-table delimiters.
/// If you have periods in your table keys, first consider:
/// 1. Not doing that
/// 2. Using node_view::operator[] instead.
///
/// \param root The root node from which the path will be traversed.
/// \param path The "TOML path" to traverse.
TOML_NODISCARD
TOML_EXPORTED_FREE_FUNCTION
node_view<node> TOML_CALLCONV at_path(node & root, std::string_view path) noexcept;
/// \brief Returns a const view of the node matching a fully-qualified "TOML path".
///
/// \see #toml::at_path(node&, std::string_view)
TOML_NODISCARD
TOML_EXPORTED_FREE_FUNCTION
node_view<const node> TOML_CALLCONV at_path(const node& root, std::string_view path) noexcept;
#if TOML_ENABLE_WINDOWS_COMPAT
/// \brief Returns a view of the node matching a fully-qualified "TOML path".
///
/// \availability This overload is only available when #TOML_ENABLE_WINDOWS_COMPAT is enabled.
///
/// \see #toml::at_path(node&, std::string_view)
TOML_NODISCARD
TOML_EXPORTED_FREE_FUNCTION
node_view<node> TOML_CALLCONV at_path(node & root, std::wstring_view path);
/// \brief Returns a const view of the node matching a fully-qualified "TOML path".
///
/// \availability This overload is only available when #TOML_ENABLE_WINDOWS_COMPAT is enabled.
///
/// \see #toml::at_path(node&, std::string_view)
TOML_NODISCARD
TOML_EXPORTED_FREE_FUNCTION
node_view<const node> TOML_CALLCONV at_path(const node& root, std::wstring_view path);
#endif
}
TOML_NAMESPACE_END;
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