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nlohmann::detail::parse_error Class Reference

exception indicating a parse error More...

`#include <json.hpp>`

Inheritance diagram for nlohmann::detail::parse_error:
Collaboration diagram for nlohmann::detail::parse_error:

## Static Public Member Functions
template<typename BasicJsonType >
static parse_error | create (int id_, const position_t &pos, const std::string &what_arg, const BasicJsonType &context)
| create a parse error exception More...
template<typename BasicJsonType >
static parse_error | create (int id_, std::size_t byte_, const std::string &what_arg, const BasicJsonType &context)

## Public Attributes
const std::size_t | byte
| byte index of the parse error More...
Public Attributes inherited from nlohmann::detail::exception
const int | id
| the id of the exception More...

## Private Member Functions
| parse_error (int id_, std::size_t byte_, const char *what_arg)

## Static Private Member Functions
static std::string | position_string (const position_t &pos)

## Additional Inherited Members
Public Member Functions inherited from nlohmann::detail::exception
const char * | what () const noexcept override
| returns the explanatory string More...
Protected Member Functions inherited from nlohmann::detail::exception
| exception (int id_, const char *what_arg)
Static Protected Member Functions inherited from nlohmann::detail::exception
static std::string | name (const std::string &ename, int id_)
template<typename BasicJsonType >
static std::string | diagnostics (const BasicJsonType &leaf_element)

## Detailed Description

exception indicating a parse error

This exception is thrown by the library when a parse error occurs. Parse errors can occur during the deserialization of JSON text, CBOR, MessagePack, as well as when using JSON Patch.

Member byte holds the byte index of the last read character in the input file.

Exceptions have ids 1xx.

name / id | example message | description
--- | --- | ---
json.exception.parse_error.101 | parse error at 2: unexpected end of input; expected string literal | This error indicates a syntax error while deserializing a JSON text. The error message describes that an unexpected token (character) was encountered, and the member byte indicates the error position.
json.exception.parse_error.102 | parse error at 14: missing or wrong low surrogate | JSON uses the `\uxxxx` format to describe Unicode characters. Code points above above 0xFFFF are split into two `\uxxxx` entries ("surrogate pairs"). This error indicates that the surrogate pair is incomplete or contains an invalid code point.
json.exception.parse_error.103 | parse error: code points above 0x10FFFF are invalid | Unicode supports code points up to 0x10FFFF. Code points above 0x10FFFF are invalid.
json.exception.parse_error.104 | parse error: JSON patch must be an array of objects | RFC 6902 requires a JSON Patch document to be a JSON document that represents an array of objects.
json.exception.parse_error.105 | parse error: operation must have string member 'op' | An operation of a JSON Patch document must contain exactly one "op" member, whose value indicates the operation to perform. Its value must be one of "add", "remove", "replace", "move", "copy", or "test"; other values are errors.
json.exception.parse_error.106 | parse error: array index '01' must not begin with '0' | An array index in a JSON Pointer (RFC 6901) may be `0` or any number without a leading `0`.
json.exception.parse_error.107 | parse error: JSON pointer must be empty or begin with '/' - was: 'foo' | A JSON Pointer must be a Unicode string containing a sequence of zero or more reference tokens, each prefixed by a `/` character.
json.exception.parse_error.108 | parse error: escape character '~' must be followed with '0' or '1' | In a JSON Pointer, only `~0` and `~1` are valid escape sequences.
json.exception.parse_error.109 | parse error: array index 'one' is not a number | A JSON Pointer array index must be a number.
json.exception.parse_error.110 | parse error at 1: cannot read 2 bytes from vector | When parsing CBOR or MessagePack, the byte vector ends before the complete value has been read.
json.exception.parse_error.112 | parse error at 1: error reading CBOR; last byte: 0xF8 | Not all types of CBOR or MessagePack are supported. This exception occurs if an unsupported byte was read.
json.exception.parse_error.113 | parse error at 2: expected a CBOR string; last byte: 0x98 | While parsing a map key, a value that is not a string has been read.
json.exception.parse_error.114 | parse error: Unsupported BSON record type 0x0F | The parsing of the corresponding BSON record type is not implemented (yet).
json.exception.parse_error.115 | parse error at byte 5: syntax error while parsing UBJSON high-precision number: invalid number text: 1A | A UBJSON high-precision number could not be parsed.

Note
  For an input with n bytes, 1 is the index of the first character and n+1 is the index of the terminating null byte or the end of file. This also holds true when reading a byte vector (CBOR or MessagePack).

{The following code shows how a `parse_error` exception can be caught.,parse_error}

See also
  - exception for the base class of the library exceptions
  - 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

Since
  version 3.0.0

Definition at line 2769 of file json.hpp.

## Constructor & Destructor Documentation

## ◆ parse_error()

nlohmann::detail::parse_error::parse_error | ( | int | id_,
|  | std::size_t | byte_,
|  | const char * | what_arg
| ) |  |
| inline private

Definition at line 2810 of file json.hpp.

## Member Function Documentation

## ◆ create() [1/2]

template<typename BasicJsonType >

static parse_error nlohmann::detail::parse_error::create | ( | int | id_,
|  | const position_t & | pos,
|  | const std::string & | what_arg,
|  | const BasicJsonType & | context
| ) |  |
| inline static

create a parse error exception

Parameters

  [in] | id_ | the id of the exception
  [in] | pos | the position where the error occurred (or with chars_read_total=0 if the position cannot be determined)
  [in] | what_arg | the explanatory string

Returns
  parse_error object

Definition at line 2782 of file json.hpp.

References nlohmann::detail::position_t::chars_read_total, nlohmann::detail::exception::diagnostics(), nlohmann::detail::exception::name(), and nlohmann::detail::string.

Referenced by nlohmann::json_pointer< BasicJsonType >::array_index(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_bson_binary(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_bson_string(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_cbor_binary(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_cbor_string(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_msgpack_string(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_high_precision_number(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_size_type(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_size_value(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_string(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::get_ubjson_value(), nlohmann::detail::parser< BasicJsonType, InputAdapterType >::parse(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_bson_element_internal(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_cbor_internal(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::parse_msgpack_internal(), nlohmann::basic_json< ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer, BinaryType >::patch(), nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::sax_parse(), nlohmann::detail::parser< BasicJsonType, InputAdapterType >::sax_parse(), nlohmann::detail::parser< BasicJsonType, InputAdapterType >::sax_parse_internal(), nlohmann::json_pointer< BasicJsonType >::split(), and nlohmann::detail::binary_reader< BasicJsonType, InputAdapterType, SAX >::unexpect_eof().

## ◆ create() [2/2]

template<typename BasicJsonType >

static parse_error nlohmann::detail::parse_error::create | ( | int | id_,
|  | std::size_t | byte_,
|  | const std::string & | what_arg,
|  | const BasicJsonType & | context
| ) |  |
| inline static

Definition at line 2790 of file json.hpp.

References nlohmann::detail::exception::diagnostics(), nlohmann::detail::exception::name(), nlohmann::detail::string, and nlohmann::to_string().

## ◆ position_string()

static std::string nlohmann::detail::parse_error::position_string | ( | const position_t & | pos | ) |
| inline static private

Definition at line 2813 of file json.hpp.

References nlohmann::detail::position_t::chars_read_current_line, nlohmann::detail::position_t::lines_read, and nlohmann::to_string().

## Member Data Documentation

## ◆ byte

const std::size_t nlohmann::detail::parse_error::byte

byte index of the parse error

The byte index of the last read character in the input file.

Note
  For an input with n bytes, 1 is the index of the first character and n+1 is the index of the terminating null byte or the end of file. This also holds true when reading a byte vector (CBOR or MessagePack).

Definition at line 2807 of file json.hpp.

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

- json.hpp