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// Copyright 2013 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 JSON_EXCEPTION_HPP
#define JSON_EXCEPTION_HPP
#include <string> // std::string
#include <sstream> // std::ostringstream
#include <system_error> // std::error_code
#include <jsoncons/unicode_traits.hpp> // unicode_traits::convert
#include <jsoncons/config/jsoncons_config.hpp>
#include <jsoncons/more_type_traits.hpp>
namespace jsoncons {
// json_exception
class json_exception
{
public:
virtual ~json_exception() noexcept = default;
virtual const char* what() const noexcept = 0;
};
// json_runtime_error
template <class Base, class Enable = void>
class json_runtime_error
{
};
template <class Base>
class json_runtime_error<Base,
typename std::enable_if<std::is_convertible<Base*,std::exception*>::value &&
type_traits::is_constructible_from_string<Base>::value>::type>
: public Base, public virtual json_exception
{
public:
json_runtime_error(const std::string& s) noexcept
: Base(s)
{
}
~json_runtime_error() noexcept
{
}
const char* what() const noexcept override
{
return Base::what();
}
};
class key_not_found : public std::out_of_range, public virtual json_exception
{
std::string name_;
mutable std::string what_;
public:
template <class CharT>
explicit key_not_found(const CharT* key, std::size_t length) noexcept
: std::out_of_range("Key not found")
{
JSONCONS_TRY
{
unicode_traits::convert(key, length, name_,
unicode_traits::conv_flags::strict);
}
JSONCONS_CATCH(...)
{
}
}
virtual ~key_not_found() noexcept
{
}
const char* what() const noexcept override
{
if (what_.empty())
{
JSONCONS_TRY
{
what_.append(std::out_of_range::what());
what_.append(": '");
what_.append(name_);
what_.append("'");
return what_.c_str();
}
JSONCONS_CATCH(...)
{
return std::out_of_range::what();
}
}
else
{
return what_.c_str();
}
}
};
class not_an_object : public std::runtime_error, public virtual json_exception
{
std::string name_;
mutable std::string what_;
public:
template <class CharT>
explicit not_an_object(const CharT* key, std::size_t length) noexcept
: std::runtime_error("Attempting to access a member of a value that is not an object")
{
JSONCONS_TRY
{
unicode_traits::convert(key, length, name_,
unicode_traits::conv_flags::strict);
}
JSONCONS_CATCH(...)
{
}
}
virtual ~not_an_object() noexcept
{
}
const char* what() const noexcept override
{
if (what_.empty())
{
JSONCONS_TRY
{
what_.append(std::runtime_error::what());
what_.append(": '");
what_.append(name_);
what_.append("'");
return what_.c_str();
}
JSONCONS_CATCH(...)
{
return std::runtime_error::what();
}
}
else
{
return what_.c_str();
}
}
};
class ser_error : public std::system_error, public virtual json_exception
{
std::size_t line_number_;
std::size_t column_number_;
mutable std::string what_;
public:
ser_error(std::error_code ec)
: std::system_error(ec), line_number_(0), column_number_(0)
{
}
ser_error(std::error_code ec, const std::string& what_arg)
: std::system_error(ec, what_arg), line_number_(0), column_number_(0)
{
}
ser_error(std::error_code ec, std::size_t position)
: std::system_error(ec), line_number_(0), column_number_(position)
{
}
ser_error(std::error_code ec, std::size_t line, std::size_t column)
: std::system_error(ec), line_number_(line), column_number_(column)
{
}
ser_error(const ser_error& other) = default;
ser_error(ser_error&& other) = default;
const char* what() const noexcept override
{
if (what_.empty())
{
JSONCONS_TRY
{
what_.append(std::system_error::what());
if (line_number_ != 0 && column_number_ != 0)
{
what_.append(" at line ");
what_.append(std::to_string(line_number_));
what_.append(" and column ");
what_.append(std::to_string(column_number_));
}
else if (column_number_ != 0)
{
what_.append(" at position ");
what_.append(std::to_string(column_number_));
}
return what_.c_str();
}
JSONCONS_CATCH(...)
{
return std::system_error::what();
}
}
else
{
return what_.c_str();
}
}
std::size_t line() const noexcept
{
return line_number_;
}
std::size_t column() const noexcept
{
return column_number_;
}
#if !defined(JSONCONS_NO_DEPRECATED)
JSONCONS_DEPRECATED_MSG("Instead, use line()")
std::size_t line_number() const noexcept
{
return line();
}
JSONCONS_DEPRECATED_MSG("Instead, use column()")
std::size_t column_number() const noexcept
{
return column();
}
#endif
};
#if !defined(JSONCONS_NO_DEPRECATED)
JSONCONS_DEPRECATED_MSG("Instead, use ser_error") typedef ser_error serialization_error;
JSONCONS_DEPRECATED_MSG("Instead, use ser_error") typedef ser_error json_parse_exception;
JSONCONS_DEPRECATED_MSG("Instead, use ser_error") typedef ser_error parse_exception;
JSONCONS_DEPRECATED_MSG("Instead, use ser_error") typedef ser_error parse_error;
typedef ser_error codec_error;
#endif
} // namespace jsoncons
#endif
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