nlohmann::detail::exception Class Reference

general exception of the basic_json class More...

#include <json.hpp>

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Public Member Functions
const char *	what () const noexcept override
	returns the explanatory string More...

Data Fields
const int	id
	the id of the exception More...

Protected Member Functions
	exception (int id_, const char *what_arg)

Static Protected Member Functions
template<typename BasicJsonType >
static std::string	diagnostics (const BasicJsonType &leaf_element)
static std::string	name (const std::string &ename, int id_)

Private Attributes
std::runtime_error	m
	an exception object as storage for error messages More...

Detailed Description

general exception of the basic_json class

This class is an extension of std::exception objects with a member id for exception ids. It is used as the base class for all exceptions thrown by the basic_json class. This class can hence be used as "wildcard" to catch exceptions.

Subclasses:

• parse_error for exceptions indicating a parse error
• invalid_iterator for exceptions indicating errors with iterators
• type_error for exceptions indicating executing a member function with a wrong type
• out_of_range for exceptions indicating access out of the defined range
• other_error for exceptions indicating other library errors

Note

To have nothrow-copy-constructible exceptions, we internally use std::runtime_error which can cope with arbitrary-length error messages. Intermediate strings are built with static functions and then passed to the actual constructor.

@liveexample{The following code shows how arbitrary library exceptions can be caught.,exception}

Since

version 3.0.0

Definition at line 2645 of file json.hpp.

Constructor & Destructor Documentation

exception()

nlohmann::detail::exception::exception ( int  id_, const char *  what_arg  )

inlineprotected

Definition at line 2659 of file json.hpp.

Member Function Documentation

diagnostics()

template<typename BasicJsonType >

static std::string nlohmann::detail::exception::diagnostics ( const BasicJsonType &  leaf_element )

inlinestaticprotected

Definition at line 2667 of file json.hpp.

References disinfect::a, nlohmann::detail::array, Ice::b, nlohmann::detail::binary, nlohmann::detail::boolean, replace::current, nlohmann::detail::discarded, board::element, nlohmann::detail::null, nlohmann::detail::number_float, nlohmann::detail::number_integer, nlohmann::detail::number_unsigned, nlohmann::detail::object, nlohmann::detail::string, and nlohmann::to_string().

Referenced by nlohmann::detail::parse_error::create(), nlohmann::detail::invalid_iterator::create(), nlohmann::detail::type_error::create(), nlohmann::detail::out_of_range::create(), and nlohmann::detail::other_error::create().

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name()

static std::string nlohmann::detail::exception::name ( const std::string &  ename, int  id_  )

inlinestaticprotected

Definition at line 2661 of file json.hpp.

References nlohmann::to_string().

Referenced by nlohmann::detail::parse_error::create(), nlohmann::detail::invalid_iterator::create(), nlohmann::detail::type_error::create(), nlohmann::detail::out_of_range::create(), and nlohmann::detail::other_error::create().

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what()

const char* nlohmann::detail::exception::what ( ) const

inlineoverridenoexcept

returns the explanatory string

Definition at line 2649 of file json.hpp.

References m.

Field Documentation

id

const int nlohmann::detail::exception::id

the id of the exception

Definition at line 2655 of file json.hpp.

m

std::runtime_error nlohmann::detail::exception::m

private

an exception object as storage for error messages

Definition at line 2732 of file json.hpp.

Referenced by what().

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The documentation for this class was generated from the following file:

• crossfire-crossfire-server/utils/mapper/nlohmann/json.hpp