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ExceptionTypes[]

returns a list of all registered exception types.

ExceptionTypes[tagspec]

returns a list of all registered exception types that are subtypes of the type(s) specified in tagspec.

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ExceptionTypes

ExceptionTypes[]

returns a list of all registered exception types.

ExceptionTypes[tagspec]

returns a list of all registered exception types that are subtypes of the type(s) specified in tagspec.

Details

  • ExceptionTypes[All] is equivalent to ExceptionTypes[].
  • The specification tagspec can be one of the following:
  • taga single valid exception type (symbol or string)
    {tag1,tag2,…}a list of valid exception types
  • Parent exception types in tagspec are not required to be registered themselves.
  • Registered exception types in the tagspec will be included in the result.

Examples

Basic Examples  (2)

This returns all currently registered exception types:

Wolfram Language code: ExceptionTypes[]

This registers three subtypes of a single exception type "GeneralError":

Wolfram Language code: RegisterExceptionType[ArgumentError, "GeneralError"] RegisterExceptionType[IOError, "GeneralError"] RegisterExceptionType[ArgumentTypeError, ArgumentError]

Check that the newly registered types are in the type registry now:

Wolfram Language code: ExceptionTypes[]

Get the registered types that are subtypes of ArgumentError (including itself)

Wolfram Language code: ExceptionTypes[ArgumentError]

Unregister exception types:

Wolfram Language code: Unprotect[ArgumentError, IOError, ArgumentTypeError] DeleteObject /@ {ArgumentTypeError, ArgumentError, IOError}
Wolfram Research (2026), ExceptionTypes, Wolfram Language function, https://reference.wolfram.com/language/ref/ExceptionTypes.html.

Text

Wolfram Research (2026), ExceptionTypes, Wolfram Language function, https://reference.wolfram.com/language/ref/ExceptionTypes.html.

CMS

Wolfram Language. 2026. "ExceptionTypes." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ExceptionTypes.html.

APA

Wolfram Language. (2026). ExceptionTypes. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ExceptionTypes.html

BibTeX

@misc{reference.wolfram_2026_exceptiontypes, author="Wolfram Research", title="{ExceptionTypes}", year="2026", howpublished="\url{https://reference.wolfram.com/language/ref/ExceptionTypes.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_exceptiontypes, organization={Wolfram Research}, title={ExceptionTypes}, year={2026}, url={https://reference.wolfram.com/language/ref/ExceptionTypes.html}, note=[Accessed: 12-June-2026]}