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// Copyright 2013-2025 Daniel Parker
// Distributed under the Boost license, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// See https://github.com/danielaparker/jsoncons for latest version
#ifndef JSONCONS_EXT_JSONPOINTER_JSONPOINTER_ERROR_HPP
#define JSONCONS_EXT_JSONPOINTER_JSONPOINTER_ERROR_HPP
#include <string>
#include <system_error>
#include <type_traits>
#include <jsoncons/json_exception.hpp>
namespace jsoncons { namespace jsonpointer {
class jsonpointer_error : public std::system_error, public virtual json_exception
{
public:
jsonpointer_error(const std::error_code& ec)
: std::system_error(ec)
{
}
jsonpointer_error(const std::error_code& ec, const std::string& what_arg)
: std::system_error(ec, what_arg)
{
}
jsonpointer_error(const std::error_code& ec, const char* what_arg)
: std::system_error(ec, what_arg)
{
}
jsonpointer_error(const jsonpointer_error& other) = default;
jsonpointer_error(jsonpointer_error&& other) = default;
const char* what() const noexcept override
{
return std::system_error::what();
}
};
enum class jsonpointer_errc
{
success = 0,
expected_slash = 1,
index_exceeds_array_size,
expected_0_or_1,
invalid_index,
key_not_found,
key_already_exists,
expected_object_or_array,
end_of_input,
unexpected_end_of_input,
argument_to_unflatten_invalid,
invalid_flattened_key,
invalid_uri_escaped_data
};
class jsonpointer_error_category_impl
: public std::error_category
{
public:
const char* name() const noexcept override
{
return "jsoncons/jsonpointer";
}
std::string message(int ev) const override
{
switch (static_cast<jsonpointer_errc>(ev))
{
case jsonpointer_errc::expected_slash:
return "Expected /";
case jsonpointer_errc::index_exceeds_array_size:
return "Index exceeds array size";
case jsonpointer_errc::expected_0_or_1:
return "Expected '0' or '1' after escape character '~'";
case jsonpointer_errc::key_not_found:
return "Key not found";
case jsonpointer_errc::invalid_index:
return "Invalid array index";
case jsonpointer_errc::key_already_exists:
return "Key already exists";
case jsonpointer_errc::expected_object_or_array:
return "Expected object or array";
case jsonpointer_errc::end_of_input:
return "Unexpected end of input";
case jsonpointer_errc::unexpected_end_of_input:
return "Unexpected end of jsonpointer input";
case jsonpointer_errc::argument_to_unflatten_invalid:
return "Argument to unflatten must be an object";
case jsonpointer_errc::invalid_flattened_key:
return "Flattened key is invalid";
default:
return "Unknown jsonpointer error";
}
}
};
inline
const std::error_category& jsonpointer_error_category()
{
static jsonpointer_error_category_impl instance;
return instance;
}
inline
std::error_code make_error_code(jsonpointer_errc result)
{
return std::error_code(static_cast<int>(result),jsonpointer_error_category());
}
} // namespace jsonpointer
} // namespace jsoncons
namespace std {
template<>
struct is_error_code_enum<jsoncons::jsonpointer::jsonpointer_errc> : public true_type
{
};
} // namespace std
#endif
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