GNU Texinfo 4.2: 13.9.5 @error{} (error-->): Indicating an Error Message

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### 13.9.5 `@error{}` (error-->): Indicating an Error Message

A piece of code may cause an error when you evaluate it. You can designate the error message with the `@error{}` command.

The `@error{}` command is displayed as ‘`error-->`’ in Info and as the word ‘error’ in a box in the printed output.

Thus,

    @lisp
    (+ 23 'x)
    @error{} Wrong type argument: integer-or-marker-p, x
    @end lisp

produces

    (+ 23 'x)
    error--> Wrong type argument: integer-or-marker-p, x

This indicates that the following error message is printed when you evaluate the expression:

    Wrong type argument: integer-or-marker-p, x

‘`error-->`’ itself is not part of the error message.

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