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# throw(n) 1 tcllib "Forward compatibility implementation of [throw]"

## Name

throw - throw - Throw an error exception with a message

## Synopsis

- package require Tcl 8.5
- package require throw ?1?

- ::throw error_code error_message

## Description

This package provides a forward-compatibility implementation of Tcl 8.6's throw command (TIP 329), for Tcl 8.5. The code was directly pulled from Tcl 8.6 revision ?, when try/finally was implemented as Tcl procedure instead of in C.

::throw error_code error_message

  throw is merely a reordering of the arguments of the error command. It throws an error with the indicated error code and error message.

## EXAMPLES

    throw {MYERROR CODE} "My error message"

## Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category try of the Tcllib Trackers. Please also report any ideas for enhancements you may have for either package and/or documentation.

When proposing code changes, please provide unified diffs, i.e the output of diff -u.

Note further that attachments are strongly preferred over inlined patches. Attachments can be made by going to the Edit form of the ticket immediately after its creation, and then using the left-most button in the secondary navigation bar.

## See Also

error(n)

## Keywords

error, return, throw

## Category

Utility

## Copyright

Copyright © 2015 Miguel Martínez López, BSD licensed