Class invalid_iterator

• Defined in File json.hpp

Inheritance Relationships

Base Types

• public nlohmann::detail::exception (Class exception)

• public nlohmann::detail::exception (Class exception)

Class Documentation

class invalid_iterator : public nlohmann::detail::exception, public nlohmann::detail::exception

exception indicating errors with iterators

This exception is thrown if iterators passed to a library function do not match the expected semantics.

Exceptions have ids 2xx.

name / id	example message	description
json.exception.invalid_iterator.201	iterators are not compatible	The iterators passed to constructor basic_json(InputIT first, InputIT last) are not compatible, meaning they do not belong to the same container. Therefore, the range (first, last) is invalid.
json.exception.invalid_iterator.202	iterator does not fit current value	In an erase or insert function, the passed iterator pos does not belong to the JSON value for which the function was called. It hence does not define a valid position for the deletion/insertion.
json.exception.invalid_iterator.203	iterators do not fit current value	Either iterator passed to function erase(IteratorType first, IteratorType last) does not belong to the JSON value from which values shall be erased. It hence does not define a valid range to delete values from.
json.exception.invalid_iterator.204	iterators out of range	When an iterator range for a primitive type (number, boolean, or string) is passed to a constructor or an erase function, this range has to be exactly (begin(), end()), because this is the only way the single stored value is expressed. All other ranges are invalid.
json.exception.invalid_iterator.205	iterator out of range	When an iterator for a primitive type (number, boolean, or string) is passed to an erase function, the iterator has to be the begin() iterator, because it is the only way to address the stored value. All other iterators are invalid.
json.exception.invalid_iterator.206	cannot construct with iterators from null	The iterators passed to constructor basic_json(InputIT first, InputIT last) belong to a JSON null value and hence to not define a valid range.
json.exception.invalid_iterator.207	cannot use key() for non-object iterators	The key() member function can only be used on iterators belonging to a JSON object, because other types do not have a concept of a key.
json.exception.invalid_iterator.208	cannot use operator[] for object iterators	The operator[] to specify a concrete offset cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
json.exception.invalid_iterator.209	cannot use offsets with object iterators	The offset operators (+, -, +=, -=) cannot be used on iterators belonging to a JSON object, because JSON objects are unordered.
json.exception.invalid_iterator.210	iterators do not fit	The iterator range passed to the insert function are not compatible, meaning they do not belong to the same container. Therefore, the range (first, last) is invalid.
json.exception.invalid_iterator.211	passed iterators may not belong to container	The iterator range passed to the insert function must not be a subrange of the container to insert to.
json.exception.invalid_iterator.212	cannot compare iterators of different containers	When two iterators are compared, they must belong to the same container.
json.exception.invalid_iterator.213	cannot compare order of object iterators	The order of object iterators cannot be compared, because JSON objects are unordered.
json.exception.invalid_iterator.214	cannot get value	Cannot get value for iterator: Either the iterator belongs to a null value or it is an iterator to a primitive type (number, boolean, or string), but the iterator is different to begin().

@liveexample{The following code shows how an invalid_iterator exception can be caught.,invalid_iterator}

See also

- exception for the base class of the library exceptions

See also

- parse_error for exceptions indicating a parse error

See also

- type_error for exceptions indicating executing a member function with a wrong type

See also

- out_of_range for exceptions indicating access out of the defined range

See also

- other_error for exceptions indicating other library errors

Since

version 3.0.0

Public Static Functions

static inline invalid_iterator create(int id_, const std::string &what_arg)

static inline invalid_iterator create(int id_, const std::string &what_arg)