Previous: Condition Abstraction, Up: Condition Instances [Contents][Index]
The simple procedures described in this section are built on top of the more detailed abstraction of condition objects described above. While these procedures are sometimes easier to use, they are often less efficient.
Create a new condition object as an instance of condition-type,
associated with continuation. The continuation is provided
for inspection purposes only, not for restarting the computation.
The restarts argument is described in Restarts. The
field-plist is an alternating list of field names and values for
those fields, where the field names are those that would be returned by
(condition-type/field-names condition-type). It is used to
provide values for fields in the condition object; fields with no value
specified are set to #f. Once a condition object has been
created there is no way to alter the values of these fields.
Returns the value stored in the field field-name within
condition. Field-name must be one of the names returned by
(condition-type/field-names (condition/type condition)).
access-condition looks up the field-name at runtime, so it
is more efficient to use condition-accessor to create an access
function if the same field is to be extracted from several instances of
the same condition type.
Returns a string containing a report of the condition. This is
generated by calling write-condition-report on condition
and a string output port, and returning the output collected by the port
as a string.
Previous: Condition Abstraction, Up: Condition Instances [Contents][Index]