Figure 9--1 lists the standardized condition types. Additional condition types can be defined by using define-condition.
arithmetic-error floating-point-overflow simple-type-error cell-error floating-point-underflow simple-warning condition package-error storage-condition control-error parse-error stream-error division-by-zero print-not-readable style-warning end-of-file program-error type-error error reader-error unbound-slot file-error serious-condition unbound-variable floating-point-inexact simple-condition undefined-function floating-point-invalid-operation simple-error warning
Figure 9--1: Standardized Condition Types
All condition types are subtypes of type condition. That is,
(typep c 'condition) => true
if and only if c is a condition.
Implementations must define all specified subtype relationships. Except where noted, all subtype relationships indicated in this document are not mutually exclusive. A condition inherits the structure of its supertypes.
The metaclass of the class condition is not specified. Names of condition types may be used to specify supertype relationships in define-condition, but the consequences are not specified if an attempt is made to use a condition type as a superclass in a defclass form.
Figure 9--2 shows operators that define condition types and creating conditions.
define-condition make-condition
Figure 9--2: Operators that define and create conditions.
Figure 9--3 shows operators that read the value of condition slots.
arithmetic-error-operands simple-condition-format-arguments arithmetic-error-operation simple-condition-format-control cell-error-name stream-error-stream file-error-pathname type-error-datum package-error-package type-error-expected-type print-not-readable-object unbound-slot-instance
Figure 9--3: Operators that read condition slots.
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