# Exception Base Classes

The :std/error library provides base classes for exceptions and errors.

# exception

(defsyntax exception)

Empty base class for library-defined exceptions.

# <error>

(defsyntax <error>)

Base class for commonly structured error objects.

It is a struct type with 3 fields:

• message: a string message describing the error
• irritants: a list containing the irritants pertaining to the error
• trace: an optional symbol tracing the originating procedure

# io-error

(defstruct (io-error <error>) ())

Errors raised by the standard library because of I/O conditions.

# raise-io-error

(raise-io-error where what . irritants)

Raises an io-error.

# timeout-error

(defstruct (timeout-error <error>) ())

Errors raised by the standard library because of timeouts.

# raise-timeout

(raise-timeout where what . irritants)

Raises a timeout-error.